Canon CP660 Service Manual
Canon CP660 Service Manual
Canon CP660 Service Manual
FEB.1999 FY8-13FJ-000
COPYRIGHT © 1999 CANON INC. CANON 660/2100 REV.0 FEB. 1999 PRINTED IN JAPAN (IMPRIME AU JAPON)
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IMPORTANT
Printed in Japan
Imprimé au Japon
Prepared by
CANON INC.
COPYRIGHT © 1999 CANON INC. CANON 660/2100 REV.0 FEB. 1999 PRINTED IN JAPAN (IMPRIME AU JAPON)
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INTRODUCTION
This Service Manual contains basic data and figures on the color printer needed to
service the machine in the field.
This machine consists of the following system units:
1. Reader unit
2. Editor
3. Original holder
4. Printer unit
5. Duplexing unit
6. R cassette
7. PS/PCL board*
For the reader unit, duplexing unit, R cassette, and PS/PCL board, refer to their
respective Service Manuals. This manual covers the printer unit, duplexing unit, and R
cassette, and consists of the following chapters:
Chapter 3 Laser Exposure System discusses the principles of operation used for the
mechanical/electrical operations of the machine’s laser system. It also explains the tim-
ing at which the various units involved are operated, and shows how they may be disas-
sembled/assembled and adjusted.
Chapter 4 Image Formation System discusses the principles of how images are
formed. It also explains the timing at which the various units involved in image formation
are operated, and shows how they may be disassembled/assembled and adjusted.
Chapter 5 Pick-Up/Feeding System discusses the principles of how the printer unit
picks up and moves paper inside it. It also explains the timing at which the various units
involved are operated, and shows how they may be disassembled/assembled and adjust-
ed.
Chapter 6 Fixing System discusses the principles of how the printer unit fuses toner
images to paper. It also explains the timing at which the various units involved are oper-
ated, and shows how they may be disassembled/assembled and adjusted.
Chapter 8 Installation introduces requirements for the site of installation, and shows
how the printer unit may be installed using step-by-step instructions.
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Chapter 10 Troubleshooting provides tables of maintenance/inspection,
standards/adjustments, and problem identification (image fault/malfunction).
Appendix contains a general timing chart and general circuit diagrams.
The descriptions in this Service Manual are subject to change without notice for prod-
uct improvement or other purposes, and major changes will be communicated in the
form of Service Information bulletins.
All service persons are expected to have a good understanding of the contents of this
Service Manual and all relevant Service Information bulletins and be able to identify and
isolate faults in the machine.
Reference:
Reader Unit Service Manual: FY8-13FH-000
PS/PCL Board Service Manual: FY8-13FK-000
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FOREWORD
System Configuration
This printer unit is designed to accommodate the following accessories:
• Upper 500 Sheet Cassette CS-82 A4R/A5R/B5R/LTRR*1
• Duplex Unit-A1 *1
• 1000-Sheet Paper Deck-D1 *2,3
• 2×500-Sheet Paper Deck-C1 *2,3
• 2000-Sheet Paper Deck-N1 *2,3
• ACC Controller-A1 *2,3
• ACC Interface Board-B1 *3
• ACC Interface Unit-B1 *3
(ACC controller-A1, ACC Interface Board-B1 and Plate)
• Sorter-H1 (requires the Attachment Kit for STR-H1 if the printer unit is mounted to
a Rack-A1) *2, *3
• Network Color PS/PCL Board-A1 *2
• Token Ring Board TB83
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CONTENTS
CHAPTER 1 GENERAL DESCRIPTION
I. FEATURES ..............................................1-1 VIII. IMAGE FORMATION .............................1-20
II. SPECIFICATIONS....................................1-2 A. Outline..............................................1-20
A. Printer Unit .........................................1-2 B. Latent Static Image Formation
III. SAFETY OF LASER LIGHT.....................1-6 Block ................................................1-22
IV. NAMES OF PARTS..................................1-7 C. Development Block ..........................1-25
A. External View .....................................1-7 D. Transfer Block ..................................1-27
B. Cross Section...................................1-11 E. ITD (intermediate transfer drum)
V. USING THE CONTROL PANEL.............1-13 Cleaning Block .................................1-31
VI. NOTES TO THE USER ..........................1-15 F. Photosensitive Drum Cleaning.........1-33
VII. NOTES TO THE SERVICE PERSON ....1-16 G. Fixing Block......................................1-34
A. Storing the Drum Cartridge and the
Toner Cartridges ..............................1-16
B. Points to Note When Handling the
Drum Cartridge and the Toner
Cartridges ........................................1-18
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CHAPTER 4 IMAGE FORMATION SYSTEM
I. OUTLINE..................................................4-1 V. IMAGE STABILIZATION CORRECTION
A. Construction.......................................4-1 CONTROL..............................................4-21
B. Operations..........................................4-2 A. Environmental Changes Correction
II. FORMING LATENT STATIC IMAGES......4-5 Control .............................................4-21
A. Outline................................................4-5 B. Image Density Correction Control (maxi-
B. Drum Cartridge Memory ....................4-6 mum density control)........................4-21
C. Checking the Life of the Photosensitive C. Image Gradation Correction Control
Drum ..................................................4-8 (requires a PS/PCL Board) ..............4-22
D. Monitoring the Waste Toner Case......4-9 D. Detecting the Density.......................4-23
III. DEVELOPMENT ....................................4-10 VI. HIGH-VOLTAGE POWER SUPPLY
A. Outline..............................................4-10 CIRCUIT.................................................4-24
B. Controlling the Developing Rotary ...4-12 A. Outline..............................................4-24
C. Locking the Developing Rotary ........4-14 B. High-Voltage PCB 1 .........................4-26
D. Detecting the Absence of the Toner C. High-Voltage PCB 2 .........................4-30
Cartridges ........................................4-14 D. Separation Static Eliminating Bias
E. Detecting the Level of Color Toner...4-16 PCB..................................................4-33
F. Checking the Presence/Absence of a VII. OTHER CONTROL MECHANISMS.......4-34
Color Toner Cartridge.......................4-17 A. Developing Rotary Motor Control ....4-34
G. Checking the Level of Black Toner and B. Controlling the Cartridge Motor .......4-36
the Presence/Absence of the Black C. Controlling the Drum Motor..............4-37
Toner Cartridge ................................4-17 VIII. DISASSEMBLY/ASSEMBLY ..................4-38
IV. TRANSFER............................................4-18 A. Drive System....................................4-39
A. Outline..............................................4-18 B. Charging, Developing, and
B. Locking the Secondary Transfer Cleaning ...........................................4-45
Belt ...................................................4-19 C. PCBs ................................................4-53
C. Controlling the ITD Cleaning
Roller................................................4-20
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CHAPTER 6 FIXING SYSTEM
I. OUTLINE..................................................6-1 D. Detecting a Fault in the Fixing
II. FIXING CONTROL CIRCUIT ...................6-2 Assembly............................................6-4
A. Controlling the Fixing Temperature ....6-2 III. DISASSEMBLY/ASSEMBLY ....................6-9
B. Preventing Rush Current ...................6-3 A. Fixing Assembly ...............................6-10
C. Protecting the Fixing Assembly .........6-4
CHAPTER 8 INSTALLATION
I. SELECTING THE SITE............................8-1 D. Selecting the Type of Message for
II. UNPACKING AND INSTALLATION..........8-3 the Printer Unit.................................8-14
A. Unpacking the Printer Unit.................8-3 III. RELOCATING THE MACHINE...............8-16
B. Installing the Printer Unit....................8-4 IV. INSTALLING THE DUPLEXING UNIT ...8-17
C. Making Settings and Checking Images V. INSTALLING THE VERTICAL FEED
and Operations ................................8-11 CASSETTE (A4R, LTRR, B5R, A5R) ....8-20
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CHAPTER 10 TROUBLESHOOTING
I. STANDARDS AND ADJUSTMENTS .....10-1 B. Thermistors, Lamps, and Heaters .10-72
A. Electrical System .............................10-1 C. Clutches and Solenoids .................10-74
II. TROUBLESHOOTING IMAGE D. Fans and Motors ............................10-75
FAULTS ................................................10-10 E. PCBs ..............................................10-76
A. Making Initial Checks .....................10-10 F. Duplexing Unit................................10-78
B. Guide to Test Prints for the Printer G. Variable Resistors (VR), Light-Emitting
Unit.................................................10-12 Diodes, and Check Pins PCB ........10-79
C. Troubleshooting Image Faults ........10-14 VI. SERVICE MODE..................................10-83
III. TROUBLESHOOTING A. Entering the Service Mode ............10-83
MALFUNCTIONS.................................10-28 B. Menu Structure and Key
A. Error Codes....................................10-29 Assignment ....................................10-83
B. Faults Not Identified by Error C. Main Menu .....................................10-85
Codes.............................................10-45 VII. TEST PAGE PRINT MODE..................10-93
IV. TROUBLESHOOTING FEEDING A. Generating the Test Page ..............10-93
PROBLEMS .........................................10-58 B. Test Pattern ....................................10-93
A. Paper Jams ....................................10-58 VIII. SELF DIAGNOSIS ...............................10-99
B. Faulty Feeding ...............................10-66 A. Printer unit......................................10-99
V. ARRANGEMENT AND FUNCTIONS OF
ELECTRICAL PARTS ..........................10-69
A. Sensors ..........................................10-70
APPENDIX
A. GENERAL TIMING CHART.....................A-1 D. SPECIAL TOOLS...................................A-17
B. SIGNALS AND ABBREVIATIONS...........A-7 E. SOLVENTS AND OILS ..........................A-18
C. GENERAL CIRCUIT DIAGRAM ............A-15
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CHAPTER 1
GENERAL DESCRIPTION
COPYRIGHT © 1999 CANON INC. CANON 660/2100 REV.0 FEB 1999 PRINTED IN JAPAN (IMPRIME AU JAPON)
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CHAPTER 1 GENERAL DESCRIPTION
I. FEATURES
4. Reader Unit
The installation of the reader unit (accessory in some areas) will generate sharp
prints at a resolution of 600 dpi x 600 lpi.
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CHAPTER 1 GENERAL DESCRIPTION
II. SPECIFICATIONS
A. Printer Unit
1. Type
Body Desk-top page printer (console when installed to a paper
deck)
Photosensitive medium OPC drum (62-mm dia.)
2. System
Printing Laser beam indirect photostatic reproduction (using an inter-
mediate transfer drum)
Laser Semiconductor laser
Scanning system Scanning by 6-facet mirror
Charging Roller charging
Exposure Laser beam
Contrast adjustment Auto
Development Toner projection
Toner Non-magnetic, single-component dry toner (Y, M, C)
Magnetic, single-component dry toner (Bk)
Toner supply By replacement of Y, M, C, and Bk toner cartridges
Pick-up Special front cassette (2 holders), multifeeder
Transfer Primary transfer: rubber blade
Intermediate transfer drum: cleaning roller
Fixing Heat roller (top: 595 W; bottom: 595 W (100/120 V))
(top: 550 W; bottom: 550 W (220/240 V))
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CHAPTER 1 GENERAL DESCRIPTION
3. Functions
Wait time 5 min or less
First print time See Table 1-201.
Printing speed See Table 1-202.
Cassette Universal cassette: about 500 sheets of 80 g/m2
R cassette (accessory): about 500 sheets of 80 g/m2
Multifeeder tray about 10 mm in height (about 100 sheets of 80 g/m2)
Duplexing unit Through-path (accessory)
Delivery tray Face-down: about 300 sheets (80 g/m2 paper), w/ limit sensor
Face-up: about 100 sheets (80 g/m2 paper)
Print size Cassette 1 Universal cassette: LGL, B4, LTR, A4
Special cassette (accessory): LTRR, A4R, B5R, A5R
Cassette 2 Universal cassette: 11×17, A3, LGL, B4, LTR, A4
Multifeeder Envelope, A3 (11×17) to A5 (if B5 and A5, horizontal only);
12×18.5
Print paper Cassette Plain paper (60 to 105 g/m2), colored paper, recycled paper
Multifeeder Plain paper (60 to 105 g/m2), transparency (special), thick
paper (106 to 135 g/m2), label sheet (special), envelope, col-
ored paper, recycled paper
Double-sided Duplexing unit (if installed) :A3 to B5R plain paper (60 to
printing 105 g/m2)
Image margin Single-sided Double-sided
Leading edge: 5.0 ±2.0 mm Leading edge: 5.0 ±2.0 mm
Trailing edge: 5.0 ±2.0 mm Trailing edge: 5.0 ±2.0 mm
Left/right: 5.0 ±2.0 mm Left/right: 5.0 ±2.0 mm
Non-image width Single-sided Double-sided
Leading edge: 5.0 ±2.0 mm Leading edge: 5.0 ±2.0 mm
Trailing edge: 5.0 ±2.0 mm Trailing edge: 5.0 ±2.0 mm
Left/right: 5.0 ±2.0 mm Left/right: 5.0 ±2.0 mm
Resolution Main scanning 600 dpi (dots per inch)
direction
Sub scanning 600 lpi (lines per inch)
direction
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CHAPTER 1 GENERAL DESCRIPTION
4. Others
Operating environment See p. 8-1.
Power supply (rated voltage ±10%) Power supply Serial No.
120V (USA) NLQ xxxxx
120V (TWN) NLX xxxxx
230V (KOR) PLC xxxxx
230V (Others) PLF xxxxx
230V (CA)
230V (UK) ULL xxxxx
230V (FRN)
230V (GER)
230V (AMS)
230V (ITA)
Weight (printer unit only) 91.6 kg (including drum cartridge weighing about 2.3
kg; black toner cartridge, about 1.5 kg; each color
toner cartridge, about 1.2 kg)
The duplexing unit weighs about 3.5 kg.
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CHAPTER 1 GENERAL DESCRIPTION
(copies/min)
Mono-color
Source Size 4-color
(YMCK)
Plain paper Cassette A3/B4/A4R/B5/A5R/ 3 12
Multifeeder 11×17/LGL/LTRR
A4/LTR 6 24
Thick paper Multifeeder A3/11×17 1.2 1.7
A4/LTR 2.4 3.4
Transparency Multifeeder A4/LTR 2.1 2.8
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CHAPTER 1 GENERAL DESCRIPTION
Warning:
Do not insert a screwdriver or other tools with a high reflectance into the laser path
when servicing areas around the laser scanning system.
Be sure to remove watches, rings, and the like before starting to service the machine.
Figure 1-301
This label is attached to those covers of the machine’s laser scanning system which
are used to protect against laser light.
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CHAPTER 1 GENERAL DESCRIPTION
A. External View
• Front View
r
t
Figure 1-401
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CHAPTER 1 GENERAL DESCRIPTION
!1
w
!0 t
!2 y
o u
i
Figure 1-402
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CHAPTER 1 GENERAL DESCRIPTION
• Back
t
e
r
Figure 1-403
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CHAPTER 1 GENERAL DESCRIPTION
• Duplexing Unit
Figure 1-404
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CHAPTER 1 GENERAL DESCRIPTION
B. Cross Section
• Printer Unit
q w e r t
@8
y
@7 u
@6 o
i
@4
@5
!0
!1
@3
!2
!3
@2 @1 @0 !9 @9 !8 !7 !6 !5 !4
Figure 1-405
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CHAPTER 1 GENERAL DESCRIPTION
• Duplexing Unit
q w e
y t r
Figure 1-406
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CHAPTER 1 GENERAL DESCRIPTION
Caution:
This control panel is available only when the printer unit is used as a printer after
equipping it with a printer board, and is not available if the printer unit is used as a
copier.
t e y
Cancel
Enter/Online Message
Menu
q r w u i o
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CHAPTER 1 GENERAL DESCRIPTION
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CHAPTER 1 GENERAL DESCRIPTION
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CHAPTER 1 GENERAL DESCRIPTION
Low 85 to 95%
Table 1-701
Note: The term “entire storage period” means a period of one year form the date
of manufacture indicated on the cartridge package.
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CHAPTER 1 GENERAL DESCRIPTION
4. Service Life
The service life of a cartridge is 2.5 years from the date of manufacture, indicated by
means of an abbreviation on the cartridges.
For the user, a “service life,” obtained by adding 2.5 years to the date of manufacture,
is indicated on the package and the cartridge itself.
Prints made using a cartridge older than its service life may have low image quality,
making it important to use up each cartridge before the end of its service life.
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CHAPTER 1 GENERAL DESCRIPTION
Figure 1-701
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CHAPTER 1 GENERAL DESCRIPTION
8) Do not touch the two waste toner detecting windows of the drum cartridges.
Figure 1-702
Protection shutter
Figure 1-703
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CHAPTER 1 GENERAL DESCRIPTION
A. Outline
Scanning lamp
Lens CCD
Image processing
Face-down delivery assembly
Laser scanner
assembly
Black toner Waste toner case
Primary charging
cartridge rollen
Pre-exposure LED
ITD cleaning
Upper fixing roller
Face-up Lower fixing roller
delivery Registration roller
Separation static Secondary transfer belt
eliminator
Duplexing unit
Pick-up roller
Feeding roller
Cassette 1
Separation roller
Figure 1-801
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CHAPTER 1 GENERAL DESCRIPTION
The machine’s image formation processes can be grouped into the following six
blocks (12 steps):
2. Primary charging
Delivery 1. Pre-exposure
3. Laser beam exposure
Photosensitive drum
10. ITD cleaning cleaning block
5. Primary transfer
Fixing block
8. Separation
12. Fixing Registration Multifeeder
7. Secondary transfer
Cassette
Figure 1-802
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CHAPTER 1 GENERAL DESCRIPTION
Time (t)
0
-100
Surface
potential
(V)
Light area
-500
Dark area
Pre-exposure Primary charging Laser beam exposure Primary transfer Pre-exposure Primary charging
(step 1) (step 2) (step 3) (step 5) (step 1) (step 2)
Figure 1-803
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CHAPTER 1 GENERAL DESCRIPTION
Step 1 (pre-exposure)
In preparation for primary charging, the light from the pre-exposure LED assembly is
directed to the surface of the photosensitive drum to remove the residual charges from
the surface, thereby preventing uneven density.
Photosensitive
drum
Figure 1-804
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CHAPTER 1 GENERAL DESCRIPTION
Photosensitive drum
AC bias
DC bias
Figure 1-805
Laser beam
Figure 1-806
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CHAPTER 1 GENERAL DESCRIPTION
C. Development Block
In this block, toner is deposited on the latent static image on the surface of the pho-
tosensitive drum, thereby turning it into a visible image. The machine’s black toner is a
magnetic, single-component toner, and its color toner is non-magnetic, single-component
toner; the printer unit uses the toner projection method of development.
Step 4 (development)
As previously mentioned, the machine’s black toner is a magnetic, signal-component
toner consisting of magnetite and resin. Its color toner, on other hand, is a non-magnet-
ic single-component toner composed of resin. These toners have insulating characteris-
tics, and are negatively charged by friction against the surface of a rotating cylinder and
the surface of a blade.
The color toner may be yellow, magenta, or cyan, and is in a specific toner cartridge.
The color toner cartridge is housed in a developing rotary, and the rotation of the rotary
positions each cartridge against the photosensitive drum.
The black toner cartridge is mounted outside the developing rotary, and is positioned
against the photosensitive drum at all times.
When an area of the photosensitive drum exposed to a laser beam approaches a
toner layer (charged to negative potential), the difference in potential between the surface
of the drum and the developing cylinder (higher on the drum side) causes the toner to
jump and adhere the surface of the drum. This is called “jumping development,” and turns
the latent static image on the surface of the photosensitive drum into a visible image.
The developing cylinder is given an AC bias to facilitate movement of toner to the sur-
face of the photosensitive drum and to improve contact on output images. The DC bias
applied to the developing cylinder is varied in reference to the result of image density cor-
rection control (p. 4-21) executed on the DC controller PCB.
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CHAPTER 1 GENERAL DESCRIPTION
,,,
yyy
Stirring plates
,,,
yyy
Blade
,,,
yyy
Developing cylinder
AC bias
Photosensitive
drum
DC bias
yy
,,
Color toner cartridge
,,
yy
yy
,,
Blade
,,
yy
Photosensitive
drum
Figure 1-807
Caution:
Although the light area on the surface of the photosensitive drum is expressed as hav-
ing positive potential, it in practice is charged to a negative potential. (When the poten-
tial of the cylinder is used as the reference, the potential of the photosensitive drum is
higher than that of the cylinder.)
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CHAPTER 1 GENERAL DESCRIPTION
D. Transfer Block
In this block, the toner image on the surface of the photosensitive drum is transferred
to paper by way of the intermediate transfer drum.
Toner
Conducting layer
Aluminum layer
Photosensitive
drum
DC bias
Figure 1-808
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CHAPTER 1 GENERAL DESCRIPTION
Secondary pre-transfer
charging assembly
AC bias
DC bias
Figure 1-809
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CHAPTER 1 GENERAL DESCRIPTION
Paper
Secondary transfer
belt assembly
DC bias
Figure 1-810
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CHAPTER 1 GENERAL DESCRIPTION
Step 8 (separation)
Paper is attracted to the secondary transfer belt to separate it from the intermediate
transfer drum.
To suit the type of paper and the selected environmental parameters, an AC bias is
applied to the separation static eliminator to prevent stray images (toner) caused by
charges used to separate paper from the secondary transfer belt.
Separation static
eliminator
Paper
AC bias
Secondary transfer
DC bias belt assembly
Figure 1-811
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CHAPTER 1 GENERAL DESCRIPTION
Note:
In the secondary transfer block, the toner on the intermediate transfer drum is trans-
ferred to paper, leaving a minute amount of toner behind. At the end of image stabi-
lization correction control or after a jam, further, the intermediate transfer drum
remains coated with toner. All such toner is referred to as “residual toner.”
Intermediate transfer
ITTD cleaning cam drum
AC bias
DC bias
Residual toner
Figure 1-812
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CHAPTER 1 GENERAL DESCRIPTION
Photosensitive
drum cartridge
Primary charging
bias
Intermediate transfer
ITD cleaning cam drum
DC bias
Figure 1-813
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CHAPTER 1 GENERAL DESCRIPTION
||||
,,,,
yyyy
zzzz
{{{{
Waste toner
,,,,
yyyy
zzzz
{{{{
||||
Cleaning blade Stirring plate
Figure 1-814
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CHAPTER 1 GENERAL DESCRIPTION
G. Fixing Block
The toner image transferred to paper in the transfer block merely “sits” on the paper
by the work of static electricity, and would collapse if subject to the slightest impact.
In this block, the four color toners are fused into the fibers of the paper so that they
will turn into a permanent image.
Step 12 (fixing)
The surface of the upper and lower rollers is coated with Teflon tubing material with
good separation characteristics.
A negative DC bias is applied to the upper fixing roller to prevent toner on the paper
from sticking to the rollers.
Halogen heaters
Upper roller
Toner
Paper
Lower roller
DC bias
Figure 1-815
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CHAPTER 2
BASIC OPERATION
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CHAPTER 2 BASIC OPERATION
I. BASIC OPERATIONS
A. Functional Construction
The printer unit consists of four functional blocks: pick-up/feeding system, laser expo-
sure system, image formation system, and control system.
Printer unit
Control system
Laser driver PCB
DC controller PCB Laser scanner
Development
Pre-exposure
ITD cleaning
Secondary
Delivery Fixing Separation transfer Registration Pick-up control
Multifeeder
Duplexing unit
Cassette 1
Figure 2-101
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CHAPTER 2 BASIC OPERATION
B. Electrical Circuitry
The machine’s electrical mechanisms are controlled by the two CPUs (Reference) on
the DC controller PCB.
Reader unit *
Figure 2-102
Reference:
The two CPUs on the DC controller PCB have the following functions:
1. D-CPU (IC201)
• System control for the printer unit.
• Video interface control (communication with the printer board PS/PCL).
2. M-CPU(IC202)
• Drive control for various loads (motor, solenoid).
• Control of the fixing heater.
• Control of the duplexing unit (accessory).
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CHAPTER 2 BASIC OPERATION
DC controller PCB
J15
J16-3 -1 -3 J212-8 P5SAVE
Registration -1 -3 -1 -10
paper sensor PS 1 -2 -2 -2 -9 REGS* When the sensor detects
paper, '0'.
J38 -3
J49-3 -1 J2 -5
Separation -1 -3 -1 -7 P5SAVE
sensor PS 5 -2 -2 -2 -6 SEPS* When the sensor detects
paper, '0'.
Pick-up PCB
-16 -6
Cassette 1
PS 1202 UDECKC* When the cassette 1 is
sensor detected, '1'.
Cassette 1 paper
-5 -15
level sensor 1 PS 1206
UPVS1*
The level of paper inside
the cassette 1 is checked
based on combinations of
Cassette 1 paper -8 -14 the states of the two sensors.
level sensor 2 PS 1205
UPVS2*
For details, see p. 5-6.
Figure 2-103
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CHAPTER 2 BASIC OPERATION
Multifeeder tray
J1301-7 J213-7 When paper is present on
paper sensor PS 1301 MPTPS*
the multifeeder tray, '0'.
J42
Developing rotary J43-3 -1 -3 J207-3 P5SAVE
position sensor -1 -3 -1 -5
PS 3 -2 -2 -2 -4 DEVHP When the flag is detected, '1'.
J45
J1903-3 -1 -3 J207-10 P5SAVE
Fixing/delivery -1 -3 -1 -12
PS 1903
sensor -2 -2 -2 -11 FXOUTS When the sensor detects
paper, '1'.
J71
J631-3 -1 -3 J221-5 WTLED When '1', the LED turns on.
Waste toner -1 -3 -1 -7
-2 -2 -2 -6 WTNFUL When the waste toner case
detecting assembly
J633 J631 is full, '1'.
WTLED
GND
J70
J621-4 -1 -4 J221-1 CTNLED When '1', the LED turns on.
Color toner level -2 -3 -2 -3
PS 621 -1 -4 -1 -4 N.C
sensor CTNSNS When the color toner is
-3 -2 -3 -2
absent, '0'.
Figure 2-104
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CHAPTER 2 BASIC OPERATION
DC controller PCB
J53
J54-2 -2 -2 J215-2
Cassette 1 last -1 -3 -1 -3 P5SAVE When the cassette 1
PS 29 UCEDFS*contains 1 sheet of
paper sensor -3 -1 -3 -1
paper, '0'.
For details, see p. 5-15.
J32
J34-3 -1 -3 J208-1
Multifeeder tray
-1 -3 -1 -3 P5SAVE When the multifeeder
last paper
PS 19 -2 -2 -2 -2 MPDFS* tray contains more than
sensor 1 sheet of paper, pulse
signals are generated.
J8
J9-3 -1 -3 J705-7 J706-B3 J220-B7 P5SAVE
Left cover -1 -3 -1 -9 -A6 -A4
sensor PS 30 -2 -2 -2 -8
FMCOPN*
When the left cover is
open, '0'.
J1
J10-3 -4 -3 J705-4
Face-down tray -1 -6 -1 -6 -B4 -B6
delivery sensor PS 11 -2 -5 -2 -5 FDOUT* When the sensor detects
paper, '0'.
J1
J11-3 -1 -6 J705-1
Face-down tray -1 -3 -4 -3 -A7 -A3
full sensor PS 10 -2 -2 -5 -2 FDFULL When the face-down
tray is full of paper, '1'.
Figure 2-105
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CHAPTER 2 BASIC OPERATION
DC controller PCB
Cassette size PCB
J55
J801-1 -4 -1 J206-4 +5V
Temperature/ -2 -3 -2 -3 Machine internal humidity detection signal
-4 -1
HUMSNS
humidity -1 -4
-3 -2 -3 -2
TMPSNS Machine internal temperature detection signal
sensor
For details, see p. 4-21.
J209-4
-5 MSC1 Cartridge memory select signal
MPWR Cartridge memory power supply signal
-2
Drum MDO1 Cartridge memory data output signal
-3
cartridge -6 MSK1 Cartridge memory serial clock signal
memory -1 OPCSNS If the drum cartridge is present, '1'.
-7 MDI1 Cartridge memory data input signal.
-8 N.C
For details, see p. 4-6.
Figure 2-106
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CHAPTER 2 BASIC OPERATION
-7 -4
-4 -7
-1 -10
J40
J2-3 -1 -7 J211-1 +5V
BD -2 -2 -6 -2
PCB -1 -3 -5 -3
BD* Horizontal sync signal
J40
J901-4 -4 -4 J211-4 +5V
-3 -5 -3 -5 Scanner motor speed signal
M6 -7
SCMFG
-1 -7 -1 Scanner motor drive signal
-6 -2 -6
SCND
-2
Pick-up PCB
J1203-2
Feeding clutch CL2 -1 J1201-12 J210-7
FEDCLD* When '0', the feeding roller rotates.
J1201-3 J210-17 +24UH
Figure 2-107
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CHAPTER 2 BASIC OPERATION
DC controller PCB
Multifeeder tray PCB
J37
-2 -1 J212-4 +24UH
Registration CL1 -1 -2 -3 REGCLD* When '0', the registration roller rotates.
clutch
J36
-2 -1 J212-2 +24UH
Secondary transfer CL4 -2 -1 -1
belt clutch STRCLD* When '0', the secondary transfer belt
clutch turns on.
J41
Face-up delivery -2 -1 J207-2 +24UH
SL2 -2 -1 -1
solenoid FUSLD* When '0', paper is delivered face-up.
J224-1 +24UH
-2
-3 DRMPHA
Drum motor M2 -4 DRMPHA* Drum rotation control signal
-5
-6
DRMPHB
DRMPHB* Controls the rotation of the intermediate
transfer and the photosensitive drum.
Figure 2-108
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CHAPTER 2 BASIC OPERATION
Developing rotary
motor PCB Main relay PCB +24VB
J701-1 24VB J648-5 DC controller PCB
J641-1,2,3
-4,5 24VAR -1,2
Turret button
switch
SW673
J673-4 EXSW* J643-3 J647-B5 J227-B7 EXSW* When the turret button is
J673-3 GND J643-4 pressed, '0'.
Toner cartridge
cover switch
SW672
PBK J642-2
J671-1 PFUFR J642-4 J647-A9 J227-A3 DSW1 When the delivery cover/front
cover is closed, '1'.
+24UH
J647-B6 J227-B1
High- J5002-4,3 24UH J646-1,2 ∼ -B11 ∼ -B5
voltage
PCB 1
Figure 2-109
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CHAPTER 2 BASIC OPERATION
+24VB
Developing rotary
motor PCB J701-5,-4
J701-1
+24VB
J706-B1 J220-B9
J702-3 FAN1ON* When '0', the fan turns on.
Heat discharge -2 J706-A9 J220-A1
FM1 FAN1LK* When the fan is locked, '0'.
fan 1 -1
+24VB
J706-B2 J220-B8
J703-3 FAN2ON* When '0', the fan rotates.
Heat discharge -2 J706-A8 J220-A2
fan 2 FM2 FAN2LK* When the fan is locked, '0'.
-1
+24VAR
J704-1
-2
-3 Motor J706-A1 J220-A9 RMPHA
Developing driver RMPHA* Developing rotary
rotary motor
M1 -4 -B9 -B1
-5 IC701 -A2 -A8 RMPHB motor drive signal
-6 -B8 -B2 RMPHB*
For details, see p. 4-34.
+24VAR
J705
Developing -2 -2 J705-12
-11 J706-A4 J220-A6
rotary stopper SL5 -1 -3
J706-B6 J220-B4
RLSROT Developing rotary stopper
-3 -1 -10
solenoid STPROT lever drive control
For details, see 4-14.
Figure 2-110
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CHAPTER 2 BASIC OPERATION
High-voltage
PCB 1 DC controller PCB
+24UH
J5003-1
-2 J5001-A10 J226-A3
-3 -A9 -A4
SLVPHA
Cartridge motor M3 -4 -B3 -B10
SLVPHA* Cartridge motor rotation control
-5 -B4 -B9
SLVPHB
SLVPHB*
Controls the rotation of the
developing cylinder for the
color and black toner cartridges.
Separation
static J5600 J229
Controls the bias for separation
eliminating
6 static elimination.
bias PCB
Figure 2-111
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CHAPTER 2 BASIC OPERATION
J107-10 J216-3
FXSTS
Fixing assembly error Fixing heater status detection signal
detection circuit
-11 -2 FXSTS
J107-1 J216-12
Relay Fixing heater -4 -9
safety circuit
FXRON When '1', the relay turns on.
RL101
-5 -8 When pulses are generated,
FXENB the upper/lower heater may be
supplied with power.
-2 -11
-6 -7
FXUON When '1', the upper fixing heater turns on.
Fixing heater -7 -6
FXUONS When '1', the sub drive circuit turns on.
drive circuit -8 -5 FXLON When '1', the lower fixing heater turns on.
-9 -4 FXLONS When '1', the sub drive circuit turns on.
Fixing
assembly
Upper
thermal
TPU
Upper fixing heater
Upper
HU
thermistor
Upper fixing roller surface J222-1 FXTHU
temperature detection -2 If the temperature of the upper fixing
Lower thermal roll increases, the voltage decreases.
switch
HL Lower thermistor
-3 When the temperature of the lower fixing
Lower fixing roller surface FXTHL
temperature detection -4 roller increases, the voltage decreases.
JP2 -5
FXTYP When a 100-V fixing assembly is mounted, '1'.
-6 When a 200-V fixing assembly is mounted, '0'.
* When installing the reader unit, the printer unit power switch is turned on and blocked with a face plate;
as such, it remains on at all times.
Figure 2-112
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CHAPTER 2 BASIC OPERATION
+24VA
Reversing J2009-2
roller releasing SL7 -1
solenoid PRRESLD* When '0', the reversing roller is
released.
+24VA
J2002-2
Duplexing
flapper solenoid SL6 -1
DUPSLD* When '0', paper enters the duplexing
unit.
+24VA
J2003-2
Duplexing
feeding clutch CL5 -1
DUPCLD* When '0', the duplexing feeding
roller rotates.
J2004-1
SWBAD
-2
SWBAND Duplexing motor rotation
Duplexing motor M8 -3 control signal
SWBBD
-4
SWBBND
J2005-1
HRGCOMA
-2
HRGCOMB
Horizontal -3
HRGAD Horizontal registration motor
registration M7 -4 rotation control signal
motor
HRGAND
-5
HRGBD
-6
HRGBND
Figure 2-113
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D.
2-14
Power switch ON M-CPU* ON command (unit: sec)
Sequence WMUP STBY
Figure 2-114
10.0 10.0
Primary transfer (DC) bias (positive)
2.7 7.3 10.0
Primary transfer (DC) bias (negative)
15.0 2.9 12.4 4.1
Secondary transfer belt clutch(CL4)
0.1 4.0
1. Basic Sequence when the power switch is turned on.
WMUP (warm-up) From when the power To heat the fixing During the period,
switch is turned on to roller, thereby putting the presence/
when the surface tem- the printer unit into absence of paper
perature of the upper standby state. and toner cartridges
fixing roller reaches is checked, and
160°C and that of the image stabilization
lower fixing roller correction control is
reaches 165°C. performed.
Table 2-101
Reference:
For the sequence used to make prints when the reader unit is installed, see the
Reader Unit Service Manual.
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2-16
PRNT* signal Print sequence command
(unit: sec)
Sequence STBY INTR PRNT LSTR STBY
CHAPTER 2 BASIC OPERATION
10.0 min.
Laser scanner motor (M6)
Upper fixing heater (HU) 160°C Copying temp
1.8 1.8
Registration clutch (CL1)
1.0 1.6 1.0 2.3
Pick-up motor (M5)
0.2 0.2
Cassette pick-up solenoid (SL3)
4.3
Feeding clutchV (CL2)
0.3 2.5
Drum motor (M2)
1.1 4.7 4.7 4.7 3.5
Developing rotary motor (M1)
0.8 2.0 1.6 4.3 4.3 4.3 3.5 1.0
Cartridge motor(M3)
CCW CW CCW
1.0
Secondary transfer (DC) bias (negative)
1.0 13.4 5.0
ITD cleaning roller solenoid (DL1)
ITD cleaning (DC) bias (positive) 0.9 5.0 2.0 6.8 5.3
Horizontal sync signal (TOP*) 1.7 2.2 2.2 2.2 2.2 2.2 2.2 2.2 1.0
2-17
CHAPTER 2 BASIC OPERATION
LSTR From when the regis- To fully discharge the ITD cleaning is exe-
tration roller starts to paper after secondary cuted for each print.
rotate to when paper transfer and fixing. (Cleaning is execut-
is picked up once Also, to execute ITD ed also during
again and the main cleaning. PRINT in continuous
motor stops. printing mode.)
Table 2-102
Reference:
For the sequence used to make prints when the reader unit is installed, see the
Reader Unit Service Manual.
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CHAPTER 2 BASIC OPERATION
DC controller PCB
D-CPU
(IC201) +5V
M-CPU
(IC202)
+24UH
Figure 2-117
The main motor is a 3-phase 8-pole DC brushless motor. The main motor is controlled
by an M-CPU (IC202) by way of an extension I/O, and it serves to drive the pickup-, feed-
ing-, fixing-, and delivery-related rollers and the secondary transfer belt/ITD cleaning
roller cams.
When the print sequence command*1 is received from the D-CPU (IC201), the M-
CPU (IC202) causes the main motor drive signal (MON*) to go ‘0’ by way of the exten-
sion I/O (IC203) to rotate the main motor.
The main motor causes the main motor ready signal (MRDY*) to go ‘0’ when it reach-
es a specific speed.
The motor is switched to either of three speeds in response to combinations of main
motor speed switch signals (MSPED1, MSPED2); i.e., normal, 1/4 speed (transparency
mode), and 1/3 speed (thick paper mode).
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CHAPTER 2 BASIC OPERATION
Table 2-103 shows the relationship between speed and combinations of MSPED1
and MSPED2.
MSPED1 MSPED1
Normal mode (normal rotation) 0 0
Transparency mode (1/4 speed) 1 0
Thick paper mode (1/3 speed) 0 1
At rest 1 1
Table 2-103
In the event of the following (main motor error), the D-CPU communicates the fact to
the printer board*2:
1.MRDY* does not go ‘0’ 2.5 sec after the main motor starts to rotate.*3
2.MRDY* goes ‘1’ for 2.5 sec or more after MRDY* has gone ‘0’ once.*4
*1 Copy Start key ON command (when making copies with the reader unit installed).
*2 Reader controller PCB (when making copies with the reader unit installed).
*3 Indicates ‘E010’ on the control panel.
*4 Indicates ‘E011’ on the control panel.
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CHAPTER 3
LASER EXPOSURE SYSTEM
This chapter provides descriptions on the machine’s laser exposure operations, func-
tions of each operation, relationships between electrical and mechanical systems, and
timing at which each associated part is turned on.
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CHAPTER 3 LASER EXPOSURE SYSTEM
I. OUTLINE
Printer board*1
BD*
Scanner motor
BD PCB
Imaging lens
BD mirror
Reflecting mirror
Photosensitive drum
Figure 3-101
*1 Reader controller PCB (when making prints with the reader unit installed).
The video signals (DVDO0 through 7*) from the printer board1 are converted into
PWM video data signals (VDATA*; subjected to pulse width modulation on the DC con-
troller PCB); then, they are converted into two sets of low-voltage differential signals
(Note) with suppressed radiation noise, and are sent to the laser driver PCB.
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CHAPTER 3 LASER EXPOSURE SYSTEM
The signals are further converted into laser drive signals on the laser driver PCB
(internal signals of the laser/scanner assembly) used to turn on and off the laser diode,
thereby generating a laser beam.
The modulated laser beam is turned into a parallel beam by means of a collimating
lens and a cylindrical lens, and is directed to a 6-facet mirror rotating at a specific speed.
When reflected by the 6-facet mirror, the laser beam moves through an imaging lens
and a reflecting mirror arranged in front of the 6-facet mirror to focus on the photosensi-
tive drum.
The 6-faced mirror rotates at a specific speed, enabling the laser beam to scan the
surface of the photosensitive drum at a specific speed.
An image takes shape on the surface of the photosensitive drum as the drum rotates
at a specific speed and, while at the same time, as the laser beam scans its surface at a
specific speed.
Note:
Low Voltage Differential Signal
The machine’s PWM modulation circuit is on the DC controller PCB, requiring PWM-
modulated laser drive signals to move through a cable for turning on and off the laser.
If PWM-modulated laser drive signals were sent over a cable as they are, the noise
radiating from the cable would affect the PCBs on the way. To prevent such a problem,
the signals are processed to suppress amplitude. The printer unit generates two sets
of signals (differential signals) to avoid a decrease in the noise margin, otherwise
caused by low amplitude.
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CHAPTER 3 LASER EXPOSURE SYSTEM
A. Outline
DC controller PCB
BD*
BD PCB
+5V
PWM IC
Receiver IC
(IC208)
(IC1001) PD LD
PWMF1
VDATO
SAMPLE*
PCLK
DATA*
0Å`7
UBLON
LENB*
BD* Current/voltage
DTOP* conversion circuit
DLSYNC*
G. A. Switching
DPRNT*
(IC204) circuit
D-CPU
DCMD* (IC201) VDATIN8*
+ Laser current
DVDO0~7*
DVCLK RAM Reference voltage
setting circuit
(IC205)
VDATIN0~7*
BDO* Laser drive IC
BD sync IC (IC1002)
PCLK (IC206) C1004
Figure 3-201
The laser control circuit serves to control the laser mechanism according to the video
signals (DVDO0 through 7*) from the printer board. The GA (IC204) on the DC controller
PCB generates video data signals (VDATO0 through 7) and image mode setting signal
(PWMF1) using video signals from the printer board *1 and the image mode switch sig-
nals (VDATIN8*) coming by way of the D-CPU (IC201).
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CHAPTER 3 LASER EXPOSURE SYSTEM
The PWM IC (IC208) generates PWM modulation signals (VDATA*; PWM video sig-
nals); then, it sends two sets of laser drive signals (DATA*, BDATA) through the LVDS IC
(IC209) to the laser driver PCB. The receiver (IC1001) on the laser driver PBC demodu-
lates these two sets of signals to generate laser drive signals (DATA*) for the laser drive
IC (IC1002).
When the APC sampling timing signal (SAMPLE*) is ‘1’ and the image enable signal
(LENB*) is ‘0’, the laser drive IC turns on the laser diode in response to the laser drive
signal (DATA*).
*1 Reader controller PCB (when making prints with the reader unit installed).
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CHAPTER 3 LASER EXPOSURE SYSTEM
Note:
Switching the Image Mode
The printer unit switches image mode (text or halftone) in response to the image mode
switch command from the reader controller PCB so as to enable the best images in
text and halftone areas.
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CHAPTER 3 LASER EXPOSURE SYSTEM
Table 3-201
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CHAPTER 3 LASER EXPOSURE SYSTEM
Note:
1. Sampling Mode
In APC control, when the LENB* signal is ‘0’ and the SAMPLE* signal is ‘0’ (i.e., the
unblanking signal UBLON used to generate the SAMPLE* signal is generated by
the GA), the DATA* signal is forced to go ‘0’.
2. Hold/Print Mode
In this mode, the laser intensity resulting from APC control is retained. When the
SAMPLE* signal is ‘1’ and the LENB* signal is ‘0’, C1004 retains the laser intensity
in the form of a voltage without regard to DATA* signals.
When video signals are received, the laser diode is turned on and off according to
the DATA* signals.
3. Clear Mode
When the LENB8 signal is ‘1’, the C1004 is discharged without regard to DATA sig-
nals* and SAMPLE* signals.
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CHAPTER 3 LASER EXPOSURE SYSTEM
masking signal
Top/bottom
LSYNC*
TOPR*
VERTEN
Left/right T2
HORZEN masking signal
T1
5mm
T3
5 mm
5 mm 5 mm
Figure 3-202
Note:
1. The laser beam is capable of writing within the shaded area.
2. T1 throng T3 differ according to paper size.
3. If the paper size command from the printer board does not indicate a paper size
when the multifeeder is used, the printer unit assumes T3 is 12x18.5 (maximum
paper size) in the absence of data.
The multifeeder tray is equipped with a paper width sensor (PS1701) for detection
of the width of paper.
The CPU identifies the size of paper in relation to the length of print paper detect-
ed by PS1 when the trailing edge of the paper moves past the registration paper
sensor (PS1).
*1 Reader controller PCB (when making prints with the reader unit installed).
3-8 COPYRIGHT © 1999 CANON INC. CANON 660/2100 REV.0 FEB. 1999 PRINTED IN JAPAN (IMPRIME AU JAPON)
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CHAPTER 3 LASER EXPOSURE SYSTEM
DC controller PCB
Motor
drive
voltage
Lock generation
detection circuit
circuit
C286
SCMFG J901-3
5 M
Scanner motor
BD* J2-2 BD
2
BD PC
Figure 3-301
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CHAPTER 3 LASER EXPOSURE SYSTEM
The speed is controlled based on the laser scanner motor speed signal (SCMFG)
from the laser scanner motor, while the phase is controlled using the BD signal. (See
Note.)
When the printer unit is turned on and the PRNT* signal is sent to the D-CPU (PC201)
on the DC controller PCB, the D-CPU sends the rough adjustment acceleration signal
(VUP*) to the speed control voltage generation circuit through the GA (IC204).
As a result, the motor drive voltage generation circuit generates the laser scanner
motor drive signal (SCND) to rotate the laser scanner motor. The laser scanner motor
feeds the SCMFG signal to the GA (feedback) to communicate its revolution, and the GA
controls the VUP8 signal and the VDWN8 signal until a specific revolution is reached.
When the laser scanner motor reaches a specific revolution, the GA switches from the
SCMFG signal to the BD* signal as the target of detection to start control of the laser
scanner motor (including phase control).
The GA adds the fine adjustment acceleration signal (PLUP*) and the fine adjustment
deceleration signal (PLDWN*) to the rough adjustment signal, and controls the fine
adjustment signal (PLUP*, PLDWN*) until the phases match based on the BD* signal
from the BD PCB, consequently causing the laser scanner motor to rotate at a specific
speed.
When a specific revolution is reached, the GA writes BDRDY to the internal register
to enable the D-CPU (IC201) to judge whether the laser scanner motor is rotating at a
specific speed by monitoring the data.
Note:
The printer unit deposits four color toners on a single sheet of paper, requiring that the
laser write start position be accurate. To ensure correct laser rotation (revolution), the
printer unit controls the motor including its phase.
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CHAPTER 3 LASER EXPOSURE SYSTEM
Note:
1. If the cycle of the BD signals fails to be a specific cycle 7 sec after the scanner
motor starts to rotate (during initial drive).
2. If BDRDY is “false” for 2.5 sec or more after the scanner motor has reached its spe-
cific speed (after BDRDY has been written to the internal register of the GA).
3. The error memory capacitor (C286) is a protective mechanism preventing continu-
ous application of the scanner motor drive signal. The error of the lock detection cir-
cuit is initialized in 10 sec or so. The SCNON signal also forces the capacitor to dis-
charge, thereby initializing the error.
Reference:
E100: Fault in the laser.
E110: Fault in the laser scanner motor, or a BD fault.
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CHAPTER 3 LASER EXPOSURE SYSTEM
V. DISASSEMBLY/ASSEMBLY
Make sure of the following when disassembling or assembling the machine:
1. When the printer unit power switch is turned off, the fans will operate for about
30 min to cool the machine (so as to prevent caking of toner). Be sure to perform
either of the following in addition to disconnecting the power plug:
• Wait for 30 min after turning off the printer unit power switch; or
• Turn off the printer unit power switch, and remove the fixing assembly of the
printer unit.
2. Assemble the parts by reversing the steps used to disassemble them, unless other-
wise mentioned.
3. Identify the screws by type (length, diameter) and location.
4. Do not leave out the toothed washer that comes with one of the mounting screws on
the rear cover to protect against static electricity.
5. Do not leave out the washer that comes with the screw used for the grounding wire
and the varistor to ensure electrical continuity.
6. Do not operate the machine with any of its parts removed, unless otherwise men-
tioned.
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CHAPTER 3 LASER EXPOSURE SYSTEM
Figure 3-501
!0 Inside cover 1
!1 Inside cover 2
!2 Inside cover 3 !1
!3 Inside cover 4
!0
!2
!3
Figure 3-502
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CHAPTER 3 LASER EXPOSURE SYSTEM
3. Upper Cover
1) Remove the front right cover by fol-
lowing the steps on p. 3-14.
2) Open the left cover, and loosen the
two screws.
q
e
q Screws w Strap
e Metal fixing r Front cover
Figure 3-503
Figure 3-506
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CHAPTER 3 LASER EXPOSURE SYSTEM
Figure 3-507
q Strap w Screws
Caution: e Side cover
Put the connector w under the edge
saddle of the printer unit when mount- Figure 3-508
ing the upper cover.
4) Remove the seven screws, and
detach the side cover.
Caution:
When mounting the upper cover to the
printer unit, check to make sure that
the two claws q of the upper cover are
fitted in the delivery assembly cover.
w
Figure 3-509
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CHAPTER 3 LASER EXPOSURE SYSTEM
Figure 3-512
Figure 3-510 q
q Open/close lever
w Fan cover
Figure 3-513
q Rear cover w Screws
Figure 3-511
3-16 COPYRIGHT © 1999 CANON INC. CANON 660/2100 REV.0 FEB. 1999 PRINTED IN JAPAN (IMPRIME AU JAPON)
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CHAPTER 3 LASER EXPOSURE SYSTEM
q w
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CHAPTER 3 LASER EXPOSURE SYSTEM
3) Lift the delivery cover slightly to 4) Disconnect the two connectors, and
detach its right; then, detach its left. detach the pre-exposure LED assem-
bly.
w
q
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CHAPTER 3 LASER EXPOSURE SYSTEM
q Claws
Figure 3-524
q
3) Disconnect the connector, and
q Screws w Fan duct remove the multifeeder tray.
Figure 3-522
w
q Connector
w Multifeeder tray
Figure 3-525
q
Figure 3-523
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CHAPTER 3 LASER EXPOSURE SYSTEM
q w
q Claws
w Toner catch tray cover q Screw w Releasing lever
5) Pull out the toner catch tray, and 5) Remove the three screws, and detach
remove the eight screws; then, detach
the inside cover 1. q
w w
q
the inside cover 2.
q Screws w Inside cover 2
q Toner catch tray w Screw
e Inside cove 1 Figure 3-529
Figure 3-527
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CHAPTER 3 LASER EXPOSURE SYSTEM
q
w
w
e
q Screws q Screw
w Releasing lever button w Jam removing screw
e Releasing lever 2
Figure 3-532
Figure 3-530
w
w
Figure 3-531
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CHAPTER 3 LASER EXPOSURE SYSTEM
Figure 3-534
3-22 COPYRIGHT © 1999 CANON INC. CANON 660/2100 REV.0 FEB. 1999 PRINTED IN JAPAN (IMPRIME AU JAPON)
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CHAPTER 3 LASER EXPOSURE SYSTEM
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CHAPTER 3 LASER EXPOSURE SYSTEM
3-24 COPYRIGHT © 1999 CANON INC. CANON 660/2100 REV.0 FEB. 1999 PRINTED IN JAPAN (IMPRIME AU JAPON)
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CHAPTER 3 LASER EXPOSURE SYSTEM
q
w
w Connectors
q Scanner assembly
e Laser/scanner assembly assembly
w Laser assembly
Figure 3-540
Figure 3-539
Caution:
Do not disassemble the laser or scan-
ner assemblies. They cannot be
adjusted in the field.
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CHAPTER 4
IMAGE FORMATION SYSTEM
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CHAPTER 4 IMAGE FORMATION SYSTEM
I. OUTLINE
A. Construction
The image formation system is the core of the machine, and consists of the latent sta-
tic image formation block (drum cartridge, pre-exposure LED assembly); developing
block (color toner cartridges, black toner cartridge, developing rotary assembly); and
transfer block (intermediate transfer drum, secondary pre-transfer charging assembly,
secondary transfer belt, separation static eliminator, ITD cleaning roller).
Laser beam
Developing block
Black toner
cartridge
Latent static image
formation block
Drum cartridge
Photosen- Pre-exposure
sitive LED assembly
Color toner drum
cartridge Secondary
pre-transfer
charging assembly
Intermediate
Developing transfer drum
rotary assembly
ITD
cleaning
roller
Separation static
eliminator
Secondary
transfer belt
Transfer block
Figure 4-101
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CHAPTER 4 IMAGE FORMATION SYSTEM
B. Operations
In response to the print signal (PRNT*) from the printer board*1, the DC controller
PCB drives the photosensitive drum, primary charging roller, developing rotary assembly,
intermediate transfer drum, secondary transfer belt, and ITD cleaning roller.
At the same time, it turns on the LEDs of the pre-exposure LED assembly to remove
the residual charges from the surface of the photosensitive drum. The primary charging
roller then charges the surface of the photosensitive drum to a uniform negative poten-
tial; the laser diode directs a laser beam modulated by video data signals to the surface
of the photosensitive drum to form a latent static image.
The latent static image formed on the surface of the photosensitive drum is turned
into a visible image by toner from the toner cartridge, and is transferred (primary trans-
fer) to the intermediate transfer drum.
1. Full-Color Prints
First, Y (yellow) video data is used to form a latent static image on the photosensitive
drum, and the color developing cylinder is positioned against the photosensitive drum by
rotating the developing rotary to develop the Y toner. After development, the toner is
transferred to the intermediate transfer drum by the positive bias applied to the interme-
diate transfer drum to end the primary transfer process for Y toner.
The developing rotary is then rotated once again to position the M (magenta) devel-
oping cylinder against the photosensitive drum. A latent static image is then formed on
the photosensitive drum using M video data, and is developed and transferred (primary)
as in the case of Y toner.
The same sequence of operations is performed for C (cyan) toner to complete the
development processes, upon which the developing rotary is rotated. At this time, each
color developing cylinder is stopped where it will not face the photosensitive drum in
preparation for black development. (See Reference.)
Since the black developing cylinder is positioned always to face the photosensitive
drum, mere application of a bias starts development unlike color toners. When each color
has been developed and primary transfer has been performed four times in sequence, as
many as four color toners exist on the intermediate transfer drum to complete a series of
primary transfer processes for full-color printing.
2. Mono-Color Printing
In the case of mono-color toner, the toner is deposited on the intermediate transfer
drum when the foregoing processes have been performed once, thereby completing the
primary transfer processes.
To increase the efficiency of toner from intermediate transfer drum to paper (sec-
ondary transfer), the secondary pre-transfer charging assembly makes the charges of
toner even. When paper is moved to the intermediate transfer drum, the secondary trans-
fer belt is pushed up so that the paper is brought into contact with the intermediate trans-
fer drum.
The toner on the intermediate transfer drum is transferred to print paper by the work
of the positive bias applied to the secondary transfer belt to complete the secondary
transfer processes.
The paper is then separated from the secondary transfer belt and sent to the fixing
assembly.
*1 Reader controller PCB (when making prints with the reader unit installed).
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CHAPTER 4 IMAGE FORMATION SYSTEM
The residual toner on the photosensitive drum is removed by the cleaning blade, and
is collected in the waste toner case inside the drum cartridge. Then, the potential of sur-
face of the photosensitive drum is made even by the pre-exposure assembly and the pri-
mary charging roller to prepare for a new latent static image.
The residual toner on the intermediate transfer drum is changed by the ITD cleaning
roller, transferred to the photosensitive drum, and collected in the waste toner case inside
the drum cartridge.
Caution:
As shown in Figure 4-102, the black developing cylinder is found behind the roller
developing cylinders when we think in terms of the direction of rotation of the photo-
sensitive drum. If a color developing cylinder is in contact with the photosensitive drum
when black toner is being developed, the black toner image would be disrupted by the
color developing cylinder. This is why each color developing cylinder is moved away
from the photosensitive drum when developing black toner.
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CHAPTER 4 IMAGE FORMATION SYSTEM
FAN3ON*
Separation static
eliminating high-voltage High-voltage PCB 1/2
PCB
Main relay
PCB
Primary
charging
Bk toner roller
cartridge
Drum
cartridge
Color
developing Photosen-
cylinder sitive Pre-exposure LED assembly
drum
Color toner
cartridge Secondary transfer
charging assembly
ITD cleaning
roller Separation static
eliminator
Secondary
transfer belt
Figure 4-102
*1 Reader controller PCB (when making copies with the reader unit installed).
4-4 COPYRIGHT © 1999 CANON INC. CANON 660/2100 REV.0 FEB. 1999 PRINTED IN JAPAN (IMPRIME AU JAPON)
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CHAPTER 4 IMAGE FORMATION SYSTEM
A. Outline
The latent static image formation block consists of the drum cartridge and the pre-
exposure LED assembly.
The drum cartridge houses the photosensitive drum, primary charging roller, waste
toner case, drum cartridge memory, toner feeding roller, and stirring plate.
The photosensitive drum, toner feeding roller, and stirring plate are rotated by the
drum motor (M2), and the primary charging roller rotates in conjunction with the photo-
sensitive drum.
The waste toner inside the drum cartridge is monitored by the waste toner detecting
assembly. The life of the photosensitive drum, on the other hand, is monitored by the DC
controller PCB, and the findings are stored in the drum cartridge memory inside the drum
cartridge.
The pre-exposure LEDs are designed to expose the surface of the photosensitive
drum at specific timing.
DC controller PCB
Waste toner detection signal
(WTNFUL)
(WTLED)
Stirring plate
Detecting
window
Light-emitting
assembly
Toner feeding roller
Pre-exposure LED
Main relay PCB
PCB
Pre-exposure LED assembly
Figure 4-201
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CHAPTER 4 IMAGE FORMATION SYSTEM
*1 Reader controller PCB (when making copies with the reader unit installed).
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CHAPTER 4 IMAGE FORMATION SYSTEM
MDO1
MDI1
MSK1
DC controller PCB
Drum cartridge MSC1
OPCSNS
Figure 4-202
Reference:
E810: absence of the drum cartridge.
Caution:
If you have replaced the drum cartridge, be sure to execute auto gradation correction
control in user mode.
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CHAPTER 4 IMAGE FORMATION SYSTEM
*1 Reader controller PCB (when making prints with the reader unit installed).
Reference:
Service mode DISPLAY
0: normal
1: end of life warning 1
2: end of life warning 2
4: drum cartridge memory error
E814: stops the machine at the end of life.
If the reader unit is installed, checks may be made by selecting COPIER>
DISPLAY>SENSOR>DRUMLIFE in service mode.
Reference:
The term “imaging pages” means the number of images (Y, M, C, or Bk) written on the
photosensitive drum. For example, in the case of a 4-full-color print, the count is incre-
mented by ‘4’; in the case of a mono-color print (Y, M, C, or Bk), it is incremented by
‘1’.
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CHAPTER 4 IMAGE FORMATION SYSTEM
Reference:
COPIER>DISPLAY>SENSOR>W-TONER (indicated on the control panel if the read-
er unit is installed)
0: not full.
1: full warning.
Reference:
E013: stops the machine in response to waste toner case full condition.
E019: waste toner detecting assembly malfunction.
Light-receiving section
,,,,,,
,,,,,,
Stirring
plate
,,,,,,
Detecting
window
,,,,,,
,,,,,, Light-emitting
section
Photosensitive drum
Figure 4-203
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CHAPTER 4 IMAGE FORMATION SYSTEM
III. DEVELOPMENT
A. Outline
The developing assembly consists of three color toner cartridges and the developing
rotary assembly to which they are mounted and the black toner cartridge.
The developing rotary assembly rotates clockwise by the work of the developing
rotary motor (M1); inside, the yellow, magenta, and cyan color toner cartridges are
arranged in the order indicated and are positioned against the photosensitive drum as
needed.
The black toner cartridge is positioned so that it always faces the photosensitive
drum; during development of black toner, all color toner cartridges are moved away so
that they will not face the photosensitive drum.
The color developing cylinder and the black developing cylinder are rotated by the
cartridge motor (M3).
The developing assembly is equipped with four sensors, each serving to detect the
position of the developing rotary position (PS3), color toner cartridge level (PS621), pres-
ence of a color toner cartridges (PS1901C), or color toner cartridge releasing lever
(PS1902).
A single switch is used to check the presence/absence of the black toner cartridge
(SW644), and the toner antenna inside the black toner cartridge is used to detect the
level of black toner.
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CHAPTER 4 IMAGE FORMATION SYSTEM
DC controller PCB
q w e r t y u i o !0
Developing rotary
High-voltage PCB1
motor PCB
Main relay
PCB
M1 M3
SL5
SW644
Sub relay Black
PCB developing
Black
toner cylinder
cartridge
Stopper
arm PS1901C Black
developing
cylinder
PS1902
PS621
PS3 Intermediate
transfer drum
Developing rotary
Color toner
assembly
cartridges
Color developing
cylinder
Figure 4-301
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CHAPTER 4 IMAGE FORMATION SYSTEM
Magenta cartridge
(black cartridge C removal stop position
deceleration position flag)
Yellow cartridge stop
Yellow cartridge removal position flag
stop position PS3
Home position flag (magenta cartridge)
Yellow cartridge
(black cartridge) deceleration position
flag
Yellow Cartridge Stop Position (facing against the photo sensitive drum)
Figure 4-302
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CHAPTER 4 IMAGE FORMATION SYSTEM
If PS3 detects any of the following as a fault in the developing rotary assembly, the
DC controller PCB recognizes the fault and communicates the fact to the printer board*1
to stop the machine.
1) PS3 does not detect the home position flag.
2) PS3 detects an error between rotation position flags.
3) PS3 cannot detect a flag width different from the stop position flag.
*1 Reader controller PCB (when making prints with the reader unit installed).
Reference:
E021: fault in the developing rotary assembly.
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CHAPTER 4 IMAGE FORMATION SYSTEM
*1 Reader controller PCB (when making prints with the reader unit installed).
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CHAPTER 4 IMAGE FORMATION SYSTEM
DC controller PCB
RLOCKS
STPROT
RLSROT
Sub relay PCB
Cartridge
releasing lever
Developing rotary
stopper solenoid SL5
Color
Stopper lever cartridge
PS1902
Cartridge releasing
Toner cartridge cover lever sensor
Developing rotary
assembly
Figure 4-303
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CHAPTER 4 IMAGE FORMATION SYSTEM
Light-
receiving
section
Color toner
cartridge
Color toner Light-
level sensor emitting
(PS621) section
Figure 4-304
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CHAPTER 4 IMAGE FORMATION SYSTEM
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CHAPTER 4 IMAGE FORMATION SYSTEM
IV. TRANSFER
A. Outline
The transfer block consists of the intermediate transfer drum, secondary pre-transfer
charging assembly, secondary transfer belt, separation static eliminator, and ITD clean-
ing roller, and serves to transfer the toner image from the photosensitive drum to paper
and to remove residual toner.
The intermediate transfer drum is rotated by the drum motor (M2), and the secondary
transfer belt is rotated by the main motor (M4). When the secondary transfer belt clutch
(CL4) turns on, the secondary transfer belt is forced against the intermediate transfer
drum. When the ITD cleaning roller solenoid (SL1) turns on, on the other hand, the ITD
cleaning roller is forced against the intermediate transfer drum.
DC controller PCB
CLNRON
Maim motor drive signal
Photosensitive
drum cartridge
photo-
sensitive
drum
M4
Secondary transfer
Main motor belt clutch
Figure 4-401
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CHAPTER 4 IMAGE FORMATION SYSTEM
Secondary transfer
belt assembly
STRCLD*
DC controller PCB
Figure 4-402
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CHAPTER 4 IMAGE FORMATION SYSTEM
Intermediate
transfer drum
SL1
Figure 4-403
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CHAPTER 4 IMAGE FORMATION SYSTEM
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CHAPTER 4 IMAGE FORMATION SYSTEM
Note:
1. A color toner cartridge is assumed to have been taken out and put back in when
the toner cartridge cover is opened. For the control mechanism to start when the
color toner cartridge cover is closed, the right cover must be closed and, at the
same time, the black toner cartridge and the drum cartridge must be inside (so that
the color toner cartridge cover may be checked).
The black toner cartridge is checked by the black toner cartridge detecting switch.
For the control mechanism to start, the right cover and the color toner cartridge
cover must be closed and, at the same time, the black toner cartridge and the drum
cartridge must be set inside.
2. The right cover and the toner cartridge cover must be closed and, at the same time,
the black toner cartridge and the drum cartridge must be set inside for the presence
of the drum cartridge to be recognized. (Otherwise, density correction control is not
performed.)
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CHAPTER 4 IMAGE FORMATION SYSTEM
Photodiode 2
LED
Photodiode 1
Density sensor
Figure 4-501
The density of the density detection pattern drawn on the intermediate transfer drum
is checked by the density sensor. The density sensor is mounted on the density detec-
tion PCB; the light of a LED is directed to the density pattern on the intermediate trans-
fer drum, and the reflected light is received by the photodiode 1.
The DC controller PCB generates the LED activation signal (LEDCNT) at such times
as needed. The light from the LED is checked by the photodiode 2 directly, and the result
is sent to the density detection circuit as the intensity feedback signal (DENREF), and is
used to control the intensity of the LED to a specific level.
The light from the LED is also directed to the density detection pattern on the inter-
mediate transfer drum, and the reflected light is directed to the photodiode 1.
The density detection PCB forwards the density signals to the DC controller PCB as
the toner density detection signal (DNS). The DC controller PCB, in turn, converts the
density detection signal (analog value) into density levels (digital value) for storage in
memory.
DC controller
PCB Density detection PCB
Density sensor
Photodiode
DENREF 2
LED
LEDCNT Intermediate
transfer
drum
Photodiode
DNS 1
Figure 4-502
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CHAPTER 4 IMAGE FORMATION SYSTEM
A. Outline
Black
developing
cylinder
Black toner level
detecting antenna
Intermediate
transfer drum
(ITD)
ITD cleaning roller
Secondary
transfer belt
Separation
static
eliminating
assembly
Separation static
eliminating
high-voltage PCB
DC controller PCB
Figure 4-601
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CHAPTER 4 IMAGE FORMATION SYSTEM
Figure 4-602
Note:
The level of the primary transfer DC (positive) bias differs between mono-color print-
ing and full-color printing.
In the case of full-color printing, four color toners are deposited on the intermediate
transfer drum for primary transfer; as such, the toner with negative charges increases
for the second and subsequent colors, requiring increased transfer strength. To this
end, the copier increases the primary transfer bias DC component when it deals with
the second and subsequent colors.
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CHAPTER 4 IMAGE FORMATION SYSTEM
The copier’s high-voltage circuit consists of three PCBs; i.e., high-voltage PCB 1,
high-voltage PCB 2, and separation static elimination high-voltage PCB. These PCBs are
controlled by the DC controller PCB, and each in turn controls the following:
High-voltage PCB 1: primary charging roller, black/color developing cylinder
High-voltage PCB 2: intermediate transfer drum, ITD cleaning roller, secondary
transfer belt, secondary pre-transfer charging assembly,
upper fixing roller
Separation static elimination high-voltage PCB:
paper after secondary transfer
The DC controller PCB sets the various high-voltage levels and pulse outputs of ref-
erence frequency, and turns on and off the various high-voltage loads.
B. High-Voltage PCB 1
The high-voltage power supply PCB 1 consists of the following three circuits:
High-voltage PCB 1
DC controller PCB
Figure 4-603
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CHAPTER 4 IMAGE FORMATION SYSTEM
DC controller
PCB Primary charging AC bias drive signal Primary
charging bias
generation AC
circuit +
Primary charging bias level control signal DC (negative)
Figure 4-604
Note:
The primary charging DC bias level for image areas is varied in conjunction with the
developing DC bias of each color according to the density adjustment command from
the printer board*1 or based on the result of image density correction control (p. 4-21).
*1 Reader controller PCB (when making prints with the reader unit installed).
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CHAPTER 4 IMAGE FORMATION SYSTEM
DC controller
PCB Color developing AC bias drive signal Color
developing bias
generation AC
circuit
+
Color developing bias level control signal DC (negative)
Figure 4-605
Note:
The color developing DC bias level for image areas is varied in response to the den-
sity command from the printer board*1 or based on the result of image density cor-
rection control (p. 4-21).
*1 Rear controller PCB (when making prints with the reader unit installed).
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CHAPTER 4 IMAGE FORMATION SYSTEM
Black toner
level
detecting
antenna
Black toner
Black toner level detection signal level
detection
circuit
DC controller Black developing DC bias drive signal
PCB
AC
Black Black developing
Black developing AC bias drive signal developing bias +
DC (negative) cylinder
generation
Black developing bias level control signal circuit
Figure 4-606
Note:
The black developing DC bias level for image areas is varied in response to the den-
sity command from the printer board*1 or based on the result of image density cor-
rection control (p. 4-21).
*1 Rear controller PCB (when making prints with the reader unit installed).
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CHAPTER 4 IMAGE FORMATION SYSTEM
C. High-Voltage PCB 2
The high-voltage power supply PCB 2 consists of the five circuits shown in Figure 4-
607.
Secondary pre-transfer
charging assembly
Intermediate transfer
drum
Separation Secondary
static
eliminating transfer belt
assembly
High-voltage PCB 2
DC controller PCB
Figure 4-607
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CHAPTER 4 IMAGE FORMATION SYSTEM
Secondary pre-transfer
charging bias level switch
signal
Figure 4-608
Figure 4-609
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CHAPTER 4 IMAGE FORMATION SYSTEM
Figure 4-610
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CHAPTER 4 IMAGE FORMATION SYSTEM
Intermediate
transfer drum
Separation
static
eliminating
assembly
Secondary
transfer belt
AC
+
DC (positive)
Separation static
eliminating bias
generation circuit
Separation static eliminating DC bias drive signal Separation static eliminating AC bias drive
DC controller PCB
Figure 4-611
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CHAPTER 4 IMAGE FORMATION SYSTEM
D-CPU
(IC201)
M-CPU -2
Developing
(IC202) +5V DEVPHA rotary
DEVOFF -3 motor
J220-A9 J706-A1 6 8 RMAO
21 Q242
+5V DEVPHA* M1
44 -B1 -B9 5 1 RMAO* -4
Q247 Q245
+5V DEVPHB
-A8 -A2 RMBO -5
16 11
45 Q244
Q246 +5V DEVPHB*
-B2 -B8
17 18 RMBO* -6
Q243
Figure 4-701
The developing rotary motor is a 2-phase stepping motor, controlled by the rotary
motor driver (IC701) on the developing rotary motor PCB, and is used to rotate the devel-
oping rotary.
In response to a print sequence command from the D-CPU (IC202), the M-CPU
(IC201) sends the developing rotary motor control signals (DEVPHA, DEVPHA*,
DEVPHB, DEVPHB*) to the rotary motor driver (IC701) on the developing rotary motor
PCB.
The rotary motor driver uses these signals to send drive signals (RMAO, RMAO*,
RMBO, RMBO*) to the developing rotary motor, switching the motor between normal and
low-speed rotation modes.
The motor torque would fluctuate according to the speed of the motor, requiring vari-
ation of the current level.
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CHAPTER 4 IMAGE FORMATION SYSTEM
Rotation speed
Detection of home position or shift to cartridge Low-speed
removal position
Other than above Normal
Table 4-701
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CHAPTER 4 IMAGE FORMATION SYSTEM
7
+24UH J5003-1 Cartridge
12 motor
A9 SL VPHA* 5 8 SLVPHA -2
SL VPHB* 11 SLVPHA* -3
B4 17 M3
SLVPHB 18 SLVPHB -4
B3 16
A10 SLVPHA 6 SLVHPB* -5
M-CPU 1
(IC202)
Figure 4-702
The cartridge motor is a 2-phase stepping motor, and is controlled by the cartridge
motor driver (IC5001) on the high-voltage PCB 1 to drive the developing cylinder of the
color toner cartridge and the developing cylinder.
In response to a print sequence command from the D-CPU (IC202), the M-CPU
(IC201) sends the cartridge motor control signals (SLVPHA, SLVPHA*, SLVPHB,
SLVPHB*) to IC5005 on the high-voltage PCB through the expansion I/O (IC203).
IC5005 uses these signals to supply the motor with drive signals (SLVPHA, SLVPHA*,
SLVPHB, SLVPHB*) to rotate the developing cylinders of the color toner cartridges and
the black toner cartridges.
The machine’s drive gear arrangement would cause the developing cylinder of the
color toner cartridges and the developing cylinder of the black toner cartridge to rotate in
opposite directions if the cartridge motor was rotated in a single direction. To avoid this,
IC5005 rotates the motor clockwise when the color toner cartridge is used, while it rotates
the motor counterclockwise when the black toner cartridge is used.
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CHAPTER 4 IMAGE FORMATION SYSTEM
DC controller PCB
D-CPU
(IC201) Drum motor
+24UH
driver
(IC210)
J224-1
Drum motor
7 24UH
24UH -2
12
DRMPHA* DRMPHA* -4
44 5 1
DRMPHB* DRMPHB* -6
46 17 18 M2
DRMPHB DRMPHB -5
45 16 11
DRMPHA DRMPHA -3
43 6 8
Figure 4-703
The drum motor is a 2-phase stepping motor, and is controlled by the drum motor
driver (IC210) to drive the intermediate transfer drum and the photosensitive drum.
In response to a print sequence command from the D-CPU (IC202), the M-CPU
(IC201) sends drum motor drive signals (DRMPHA, DRMPHA*, DRMPHB, DRMPHB*)
to the drum motor driver (IC210).
IC210 uses these signals to supply the motor with drive signals (DRMPHA, DRM-
PHA*, DRMPHB, DRMPHB*), thereby rotating the intermediate transfer drum and the
photosensitive drum.
In transparency mode and thick paper mode, the drum motor is rotated at low speed
(1/4 for transparency mode, 1/3 for thick paper mode) to slow down the movement of
paper through the fixing assembly.
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CHAPTER 4 IMAGE FORMATION SYSTEM
VIII. DISASSEMBLY/ASSEMBLY
Make sure of the following when disassembling or assembling the machine:
1. When the printer unit power switch is turned off, the fans will operate for about
30 min to cool the machine (so as to prevent caking of toner). Be sure to perform
either of the following in addition to disconnecting the power plug:
• Wait for 30 min after turning off the printer unit power switch; or
• Turn off the printer unit power switch, and remove the fixing assembly of the
printer unit.
2. Assemble the parts by reversing the steps used to disassemble them, unless other-
wise mentioned.
3. Identify the screws by type (length, diameter) and location.
4. Do not leave out the toothed washer that comes with one of the mounting screws on
the rear cover to protect against static electricity.
5. Do not leave out the washer that comes with the screw used for the grounding wire
and the varistor to ensure electrical continuity.
6. Do not operate the machine with any of its parts removed, unless otherwise men-
tioned.
For removal of the external covers of the printer unit, see IV.A. “External Covers of the
Printer Unit” in Chapter 3.
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CHAPTER 4 IMAGE FORMATION SYSTEM
q
e
q Screws w Connector
e Drum drive assembly
Figure 4-801
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CHAPTER 4 IMAGE FORMATION SYSTEM
w
q
q
w
Figure 4-803
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CHAPTER 4 IMAGE FORMATION SYSTEM
q Screws
w
w Delivery drive assembly
q
Figure 4-807
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CHAPTER 4 IMAGE FORMATION SYSTEM
6) Remove the E-shaped stop ring and 8) Remove the screw, and disconnect
the bushing. the connector; then, remove the metal
fixing and the secondary transfer belt
clutch.
q
w
e
r
Figure 4-809
q Screw
7) Remove the E-shaped stop ring and w Connector
the bushing; then, detach the releas- e Metal fixing
ing lever 2. r Secondary transfer belt clutch
Figure 4-811
q
q E-shaped top ring w Bushing
e Shaft of the releasing lever 2
Figure 4-810
q Screw
w Main drive assembly
Figure 4-812
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CHAPTER 4 IMAGE FORMATION SYSTEM
Screws
Screws
q Screws w Connector
Video interface PCB
e Main motor
w q
q q
q Screws
Figure 4-816
q Screws w Connector
e Cartridge motor
Figure 4-814
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CHAPTER 4 IMAGE FORMATION SYSTEM
5) Remove the five screws, and detach 7) Remove the five screws, and detach
the shielding box. the rear cover stay.
q
w
q Screws q Screws
w Shielding box w Rear cover stay
q
q
r
w
w
e
q Screw
w Connector
e Cable clamp
r Heat discharge fan 2
Figure 4-818
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CHAPTER 4 IMAGE FORMATION SYSTEM
q Screws w Connector
e Developing rotary motor
Figure 4-821
Figure 4-822
Figure 4-823
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CHAPTER 4 IMAGE FORMATION SYSTEM
Figure 4-824
Note:
The intermediate transfer drum is
heaviest at the rear. Remove it as if to Figure 4-826
lift its rear.
3) Shift back the bottom releasing lever
of the front cover to close the cover.
2. Mounting a New Immediate
Transfer Drum
1) Remove the protective sheet from the Note:
new intermediate transfer drum as The intermediate transfer drum must
shown. be mounted correctly to set the bottom
releasing lever.
Figure 4-825
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CHAPTER 4 IMAGE FORMATION SYSTEM
w
w
q
q
q Screws
w Secondary pre-transfer charging
assembly
Figure 4-827
Note: q Claws
1. Be sure to place the intermediate w Stopper arm cover
transfer drum on a level surface.
Use paper under the drum. Figure 4-828
2. Do not clean the intermediate trans-
fer drum. If absolutely necessary,
wipe its surface with a flannel cloth
moistened with water, and then dry
wipe it.
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CHAPTER 4 IMAGE FORMATION SYSTEM
Figure 4-829
q e
Figure 4-830
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CHAPTER 4 IMAGE FORMATION SYSTEM
Figure 4-833
1
c. Color Toner Cartridge
• Do not open the shutter of a color
toner cartridge (Y, M, C) unnecessari-
ly.
2 • Put the color toner cartridge (Y, M, C)
in a protective bag whenever it is
taken out of the printer unit.
Figure 4-832
Note:
After replacing the drum cartridge, be
sure to execute auto gradation correc-
tion.
Figure 4-834
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CHAPTER 4 IMAGE FORMATION SYSTEM
q q
w
q Screw w Connector
e ITD cleaning roller solenoid
Figure 4-836
q Lever
w Secondary transfer belt assembly 4) Using a high-accuracy screwdriver,
free the two springs from the stay.
Figure 4-835
Note:
1. When replacing the secondary
transfer belt assembly, take care not
to touch the belt. w
2. Do not clean the belt.
3. When removing the secondary
transfer belt assembly, be sure to
remove the separation static elimi-
nator in advance.
4. After mounting a new secondary q
transfer belt assembly to the printer
unit, be sure to remove the protec-
tive sheet wrapped around the belt q Spring
assembly. w Stay
Figure 4-837
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CHAPTER 4 IMAGE FORMATION SYSTEM
• Enlarged View of the Right End 6) As in step 5), match the releasing
knob found on the right end of the ITD
cleaning holder assembly.
7) Pull out both ends of the ITD cleaning
holder assembly to take out the ITD
cleaning holder assembly horizontally.
w q
q Sprint w Stay
Figure 4-838
Releasing knob
Claw
Point of Removal
q
Releasing knob
q Roller roll
Claw w ITD cleaning roller solenoid
Figure 4-841
Figure 4-839
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CHAPTER 4 IMAGE FORMATION SYSTEM
w w
q
q Releasing lever
w Separation static eliminator
Figure 4-843
Caution:
When replacing the separation static
q Releasing button eliminator, take care not to touch the
w Releasing lever 2 charging wire.
Figure 4-842
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CHAPTER 4 IMAGE FORMATION SYSTEM
w q
e w w w
e q
q Screws
w Connectors
e Sub relay PCB
Figure 4-845
q Screw w Connectors
e Main relay PCB
Figure 4-844
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CHAPTER 4 IMAGE FORMATION SYSTEM
3. Removing the Video Interface PCB 3) Remove the two screws and the two
1) Perform the steps on p. 3-16 to hex nuts; then, detach the video inter-
remove the rear cover. face PCB from the metal plate.
2) Remove the four screws, and discon-
nect the two connectors on the DC
controller PCB; then, detach the video
interface PCB. Screw
Connector Connector
Hex nuts
Screws
Screws
Screw
Video Interface PCB
Video Interface PCB
Figure 4-847
Figure 4-846
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CHAPTER 4 IMAGE FORMATION SYSTEM
r
q
w w
q
q Screws w Connectors
e Claw r DC controller PCB
Figure 4-848
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CHAPTER 4 IMAGE FORMATION SYSTEM
w w
q
e
e
q r
Note:
Do not touch the VR on the high-volt- Note:
age PCB 1. It is for the factory only. Do not touch the VR on the high-volt-
age PCB 2. It is for the factory only.
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CHAPTER 4 IMAGE FORMATION SYSTEM
r e
e
q
w
q
q Screw w Connectors
e Separation static eliminating bias q Screw w Claws
PCB e Connectors
r Developing rotary motor PCB
Figure 4-851
Figure 4-852
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CHAPTER 4 IMAGE FORMATION SYSTEM
q
w
q
w
q Connector
w Density detection PCB
Figure 4-853
Note:
When replacing the density detection
3) Remove the two screws. PCB, take care not to touch the sensor
assembly.
q Screws
Figure 4-854
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CHAPTER 4 IMAGE FORMATION SYSTEM
q Screws w Connectors
e Sub transformer 2
e
Figure 4-857
q 12. Removing the Sub Transformer 3
1) Perform the steps on p. 4-57 to
remove the separation static eliminat-
ing bias PCB.
2) Remove the two screws, and detach
q Screws w Connector the duct cover.
e Sub transformer 1
Figure 4-856
Figure 4-858
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CHAPTER 4 IMAGE FORMATION SYSTEM
3) Remove the screw, and remove the 14. Removing the Color Toner
sub transformer 3. Cartridge Level Sensor
1) Perform steps 2) through 6) on p. 4-43
to remove the rear cover, shielding
box, and heat discharge fan 1.
2) Remove the screw, and disconnect
w
the connector; then, detach the color
toner cartridge level sensor.
q
Figure 4-859
e
13. Removing the Color Toner
Cartridge Sensor
1) Perform the steps on p. 3-20 to
remove the inside cover 1. q Screw w Connector
2) Remove the screw, and disconnect e Color toner cartridge level sensor
the connector; then, remove the color
toner cartridge sensor. Figure 4-861
Note:
When replacing the color toner car-
tridge level sensor, take care not to
touch the light-receiving/-emitting sec-
tion.
q
w
e
q Screw w Connector
e Color toner cartridge sensor
Figure 4-860
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CHAPTER 4 IMAGE FORMATION SYSTEM
w
e
q
q
q Claws
q Screw w Connector
w Connector e Temperature/humidity sensor
e Color toner cartridge releasing lever
sensor Figure 4-863
Figure 4-862
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CHAPTER 5
PICK-UP/FEEDING SYSTEM
This chapter provides descriptions on the machine’s operations between pickup and
delivery, functions of each operation, relationships between electrical and mechanical
systems, and timing at which each associated part is turned on.
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CHAPTER 5 PICK-UP/FEEDING SYSTEM
I. OUTLINE
A. Outline
When the PRNT* signal arrives from the printer board*1 and the scanner motor
becomes ready, the DC controller PCB starts printing operation.
In the case of pick-up from the cassette, paper is fed into the printer unit by the pick-
up roller and is moved by the feeding roller; in the case of pick-up from the multifeeder,
on the other hand, the multifeeder pick-up roller feeds paper into the printer unit.
The orientation of the paper is corrected by the registration roller so that it will not
move askew; the paper is then stopped and kept in wait. Then, the paper is started once
again so that its leading edge and the leading edge of the image on the intermediate
transfer drum will match; the paper is further moved through the transfer, separation, and
fixing/delivery assemblies all the way to the face-down tray or the face-up tray.
*1 Reader controller PCB (when making prints with the reader unit installed).
Face-down tray
Photosensitive drum
Intermediate transfer
drum
Upper fixing
roller Multifeeder pick-up
Face-up tray roller
Face-up delivery
roller
Registration Feeding roller 2
Secondary roller
Lower fixing roller transfer
belt
Pick-up roller
Feeding
rollers 1
Cassette 1 Separation roller
Pick-up roller
Figure 5-101
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CHAPTER 5 PICK-UP/FEEDING SYSTEM
The printer unit switches over three feeding speeds according to the paper type mode
signal from the printer board*1. Table 5-101 shows the speed used for each paper type.
The feeding speed is switched when paper arrives at the registration paper sensor
(PS1).
Table 5-101
The printer unit enters transparency mode when the user selects transparencies on
the control panel. To enable the printer unit to identify a transparency, transparency sen-
sors 1 and 2 (PS1801, PS1802; Figure 5-213) are mounted in front of the pick-up roller.
The DC controller PCB monitors the states of the sensors to identify a transparency
(Note).
A Canon-recommended transparency (OHT TH-1) or a transparency for a color copi-
er has a marking on its leading edge. The marking blocks either of the two sensors
(PS1801, PS1802), causing the DC controller PCB to assume that the transparency is of
a type that cannot be used for the printer unit; it then communicates the fact to the print-
er board1 and, at the same time, stops the printer unit (Note 2).
*1 Reader controller PCB (when making prints with the reader unit installed).
Note:
1. Paper is stopped once at the registration roller before re-pickup, and the DC con-
troller PCB checks the two sensors (PS1801, PS1802) during this period.
The sensors are of a feedback type, consisting of a light-emitting section and a
light-receiving section. If a transparency exists between the sections, the light from
the light-emitting section passes through it to reach the light-receiving section,
enabling the DC controller PCB to identify the medium as a transparency, thereby
starting transparency mode.
2. Canon-recommended transparencies (OHT TH-10) are extremely thin, and are
impregnated with oil. The printer unit, on the other hand, uses two fixing heaters,
and the high caloric value can cause such transparencies to jam inside the fixing
assembly.
Likewise, the printer unit rejects transparencies intended for a color copier (identi-
fying them as such in response to the marking on the leading edge by stopping the
ongoing operation).
5-2 COPYRIGHT © 1999 CANON INC. CANON 660/2100 REV.0 FEB. 1999 PRINTED IN JAPAN (IMPRIME AU JAPON)
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CHAPTER 5 PICK-UP/FEEDING SYSTEM
1. Pick-Up Operation
The printer unit moves up the paper inside the cassette using a lifter to pick-up posi-
tion; then, it brings down a rotating pick-up roller to come into contact with the paper for
pick-up.
The series of pick-up operations is executed in response to the PRNT* signal, and the
main motor is used to bring down the pick-up roller to the stack of paper, while the pick-
up motor is used to rotate the pick-up roller.
When the printer board1 sends the PRNT* signal to the printer unit, the main motor
(M4) and the pick-up motor (M5) start to rotate. When the cassette pick-up solenoid (SL3)
turns on, the drive of the main motor is sent to the cassette pick-up cam through gears,
and the rotation of the cam moves the lift arm.
At the same time, the drive of the pick-up motor is sent through the feeding roller
gears to reach the cassette pick-up roller. The rotating cassette pick-up roller moves
down to the stack of paper, and a single sheet of paper is picked up, at the end of which
the pick-up roller moves to its initial position and stops.
When the pick-up motor rotates clockwise, the pick-up roller of the cassette 1, feed-
ing roller 1, and separation roller are driven to pick up paper from the cassette 1. When
the motor rotates counterclockwise, on the other hand, the pick-up roller of the cassette
2, feeding roller 1, and separation roller are driven to pick up paper from the cassette 2.
*1: Reader controller PCB (when making prints with the reader unit installed).
Pick-up roller
Cassette pick-up cam
Feeding roller 1
Print paper
Lift arm M4 Main motor
Pick-up roller shaft
Gear
Separation roller
Cassette pick-up
solenoid (SL3)
Pick-up motor M5
Lift-up releasing arm
Figure 5-201
COPYRIGHT © 1999 CANON INC. CANON 660/2100 REV.0 FEB. 1999 PRINTED IN JAPAN (IMPRIME AU JAPON) 5-3
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CHAPTER 5 PICK-UP/FEEDING SYSTEM
DC controller PCB
q w e r t
Pick-up PCB
M4
CL1
CL2
Registration
roller
Feeding
roller 2
SL3
Pick-up Feeding
roller roller 1
Separa-
tion roller
Cassette 1
Lifter
Pick-up Feeding
roller roller 1
CW rotation
Separa-
M5 tion roller
CCW rotation
Cassette 2
Lifter
Figure 5-202
5-4 COPYRIGHT © 1999 CANON INC. CANON 660/2100 REV.0 FEB. 1999 PRINTED IN JAPAN (IMPRIME AU JAPON)
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CHAPTER 5 PICK-UP/FEEDING SYSTEM
DC controller PCB
q w e r t y u i o !0 !1 !2 !3
Pick-up PCB
PS1
PS17
PS1208
Cassette 1
SW1601 PS1202
~SW1604 PS1205
PS1206
PS29
PS120
Cassette 2
SW1601 PS1201
~
PS1203
SW1604
PS1204
q : Cassette 1 last paper detection signal (UCEDFS) PS1: Registration paper sensor
w : Cassette 2 size detection signal PS17: Pick-up assembly paper sensor
e : Cassette 1 size detection signal PS29: Cassette 1 last paper sensor
r : Cassette 2 paper level detection signal 1 (LPVS1*) PS1201: Cassette 2 sensor
t : Cassette 2 paper level detection signal 2 (LPVS2*) PS1202: Cassette 1 sensor
y : Cassette 2 detection signal (LDECKC*) PS1203: Cassette 2 paper level sensor 1
PS1204: Cassette 2 paper level sensor 2
u : Cassette 2 paper absent detection signal (LDECKS)
PS1205: Cassette 1 paper level sensor 1
i : Cassette 1 paper level detection signal 1 (UPVS1*) PS1206: Cassette 1 paper level sensor 2
o : Cassette 1 paper level detection signal 2 (UPVS2*) PS1207: Cassette 2 paper absent sensor
!0 : Cassette 1 detection signal (UDECKC*) PS1208: Cassette 1 paper absent sensor
!1 : Cassette 1 paper absent detecting signal (UDECKS) SW1601: Cassette size switch
!2 : Pick-up assembly paper detection signal (FEEDS) SW1602: Cassette size switch
!3 : Registration paper detection signal (REGS*) SW1603: Cassette size switch
SW1604: Cassette size switch
Figure 5-203
COPYRIGHT © 1999 CANON INC. CANON 660/2100 REV.0 FEB. 1999 PRINTED IN JAPAN (IMPRIME AU JAPON) 5-5
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CHAPTER 5 PICK-UP/FEEDING SYSTEM
The level of paper inside the cassette is checked in relation to the position of the lifter
used to move up the stack of paper. The lifter is equipped with a light-blocking plate, and
the position of the lifter is checked when the light-blocking plate blocks two sensors,
thereby enabling the identification of the level of paper.
In the case of the cassette 1, the outputs of the cassette 1 paper levels sensor 1
(PS1205) and the cassette 1 paper level sensor 2 (PS1206) are used; in the case of the
cassette 2, on the other hand, the outputs of the cassette 2 paper level sensor 1
(PS1203) and the cassette 2 paper level sensor 2 (PS1204) are used. Figure 5-204
shows the combinations of the states of PS1205 and PS1206 (or, of PS1203 and
PS1204).
5-6 COPYRIGHT © 1999 CANON INC. CANON 660/2100 REV.0 FEB. 1999 PRINTED IN JAPAN (IMPRIME AU JAPON)
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CHAPTER 5 PICK-UP/FEEDING SYSTEM
Pick-up assembly
Pick-up PCB
PS1204 or PS1206
PS1203 or PS1205
Light-
blocking
plate
Lifter
4
Figure 5-204
COPYRIGHT © 1999 CANON INC. CANON 660/2100 REV.0 FEB. 1999 PRINTED IN JAPAN (IMPRIME AU JAPON) 5-7
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CHAPTER 5 PICK-UP/FEEDING SYSTEM
3. Lift-Up Operation
The term “lift-up operation” is used to refer to the operation executed when the cas-
sette is slid in or when the pick-up roller shaft falls a specific distance under a lowering
stack of paper. The operation is driven by the main motor, and is executed as in the fol-
lowing two cases:
Feeding roller 1
(main motor drive)
Separation Lift arm
roller Pick-up roller shaft
Cassette pick-up
solenoid (SL3)
Gear
Lift-up cam
Lifter
Pick-up roller shaft fixing arm
Lift-up arm
Lifter gear
Figure 5-205
5-8 COPYRIGHT © 1999 CANON INC. CANON 660/2100 REV.0 FEB. 1999 PRINTED IN JAPAN (IMPRIME AU JAPON)
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CHAPTER 5 PICK-UP/FEEDING SYSTEM
Lift arm
Lift-up cam
Figure 5-206
COPYRIGHT © 1999 CANON INC. CANON 660/2100 REV.0 FEB. 1999 PRINTED IN JAPAN (IMPRIME AU JAPON) 5-9
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CHAPTER 5 PICK-UP/FEEDING SYSTEM
w When the lift arm lowers, the pick-up roller shaft moves down, pushing the lift-up
releasing arm to free the lift-up cam. At the same time, the lift arm is locked to the
pick-up roller shaft fixing arm, stopping the pick-up roller shaft at a specific position.
Pick-up
roller shaft Lift arm
Pick-up roller
shaft fixing arm
Lift-up
releasing arm
Lift-up arm
Lift-up cam
Cassette
Lifter gear
holding plate Print paper
Figure 5-207
e When the lift-up cam is freed, the lift-up cam starts to rotate so that the lift-up arm
pushes up the lifter gear by a distance equivalent to a single tooth. These opera-
tions are repeated to move up the cassette holding plate.
Lift-up arm
Lift-up cam
Print paper
Lifter gear Cassette
holding plate
Figure 5-208
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CHAPTER 5 PICK-UP/FEEDING SYSTEM
r When the paper on the cassette holding plate comes into contact with the pick-up
roller, the pick-up roller shaft is pushed up, freeing the fixing arm so that the lift-up
releasing arm will move up the pick-up roller shaft to wait position by the force of a
spring. At the same time, the pick-up roller shaft fixing arm and the lift-up releasing
arm are driven to fix the lift-up cam in place, thereby stopping the lift-up arm and
ending the lift-up operation.
Cassette pick-up roller
Lift-up arm
Lifter gear
Lift-up releasing arm
Paper
Lift-up cam
Cassette holding plate
Figure 5-209
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CHAPTER 5 PICK-UP/FEEDING SYSTEM
Paper
Figure 5-210
5-12 COPYRIGHT © 1999 CANON INC. CANON 660/2100 REV.0 FEB. 1999 PRINTED IN JAPAN (IMPRIME AU JAPON)
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CHAPTER 5 PICK-UP/FEEDING SYSTEM
w When the lift-up cam is freed, the lift-up cam starts to rotate so that the lift-up arm
pushes up the lifter gear by a distance equivalent to a single tooth. These opera-
tions are repeated to move up the cassette holding plate. (Figure 5-208)
e When the pick-up roller comes into contact with the paper on the cassette holding
plate, the pick-up roller shaft is moved up, freeing the fixing arm to cause the lift-up
releasing arm to move up the pick-up roller shaft to wait position by the force of a
spring. At the same time, the pick-up roller shaft fixing arm and the lift-up releasing
arm are driven to keep the lift-up cam in place, causing the lift-up arm to stop and
end the lift-up operation. (Figure 5-209)
COPYRIGHT © 1999 CANON INC. CANON 660/2100 REV.0 FEB. 1999 PRINTED IN JAPAN (IMPRIME AU JAPON) 5-13
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CHAPTER 5 PICK-UP/FEEDING SYSTEM
Feeding roller 1
Pick-up roller (drive from the feeding
roller 1)
Separation roller
Paper
(drive from the pick-up roller
through a torque limiter)
Normal
Double feeding
Figure 5-211
5-14 COPYRIGHT © 1999 CANON INC. CANON 660/2100 REV.0 FEB. 1999 PRINTED IN JAPAN (IMPRIME AU JAPON)
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CHAPTER 5 PICK-UP/FEEDING SYSTEM
Figure 5-212
COPYRIGHT © 1999 CANON INC. CANON 660/2100 REV.0 FEB. 1999 PRINTED IN JAPAN (IMPRIME AU JAPON) 5-15
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CHAPTER 5 PICK-UP/FEEDING SYSTEM
1. Operation
The presence/absence of paper on the multifeeder tray is checked by the multifeed-
er tray paper sensor (PS1301).
In response to the PRNT* signal, the DC controller PCB starts the main motor (M4).
At the same time, it turns on the holding plate solenoid (SL4) to free the holding plate (so
that it may move up), causing the pick-up roller to come into contact with the stack of
paper.
The up/down movement of the holding plate is checked by the holding plate sensor
(PS1302). If the holding plate is up during the wait period, the holding plate solenoid
(SL4) is turned on to bring down the holding plate.
Thereafter, the multifeeder pick-up clutch (CL3) is turned on so that the drive of the
main motor (M4) is transmitted to the multifeeder tray pick-up roller.
The stack of paper butted against the multifeeder tray pick-up roller by the holding
plate gives up one sheet in response to the rotation of the pick-up roller. After the extra
sheet, if any, has been removed by the work of the separation pad, the paper is moved
inside the printer unit. The operations that follow are the same as in cassette pick-up;
however, the holding plate solenoid (SL4) is additionally turned on immediately after the
registration roller starts to rotate to move down the holding plate.
The multifeeder tray paper width sensor (PS1701) is mounted inside the feeder tray,
detecting the width of paper in relation to the slide resistor operating in conjunction with
the size guide plate.
The DC controller PCB detects the width of paper, if any on the multifeeder tray; if the
paper is of a width different from the width specified by the printer board*1, it will identify
a paper size mismatch, and communicate the fact to the printer board1 and, at the same
time, issues a message on the printer control panel to warn the user.
*1 Reader control PCB (when making prints with the reader unit installed).
5-16 COPYRIGHT © 1999 CANON INC. CANON 660/2100 REV.0 FEB. 1999 PRINTED IN JAPAN (IMPRIME AU JAPON)
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CHAPTER 5 PICK-UP/FEEDING SYSTEM
DC controller PCB
q w e r t y u i o !0 !1
Multifeeder
pick-up
clutch
M4 CL3
Multifeeder
Registration pick-up
clutch roller PS19
PS1301
CL1
PS1
PS1701
Figure 5-213
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CHAPTER 5 PICK-UP/FEEDING SYSTEM
Figure 5-214
5-18 COPYRIGHT © 1999 CANON INC. CANON 660/2100 REV.0 FEB. 1999 PRINTED IN JAPAN (IMPRIME AU JAPON)
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CHAPTER 5 PICK-UP/FEEDING SYSTEM
DC controller PCB
D-CPU
(IC201)
+24UH
M-CPU
(IC202)
Pick-up PCB
FEDPHA
FEDPHA J210-2 J1201-20 J1202-2
66 6 9 Pick-up motor
FEDPHB -4 FEDPHB -17 -4
67 23 15
FEDI0
70 47 Pick-up
FEDI1 motor
71 24 driver
(IC211)
Figure 5-215
The pick-up motor is a 2-phase stepping motor, and is controlled by the pick-up motor
driver (IC211) for pick-up operation.
When the print sequence command is received from the D-CPU (IC202), the M-CPU
(IC201) sends the pick-up motor drive signal (FEDPHA, FEDPHA*, FEDPHB, FEDPHB*)
and the pick-up motor current level switch signal (FEDI0, FEDI1) to the pick-up motor dri-
ver (IC211) by way of the expansion I/O (IC203).
The pick-up motor driver (IC211) uses these signals to supply the motor with the drive
signals (FEDPHA, FEDPHA*, FEDPHB, FEDPHB*) to switch among three motor speeds:
for normal clockwise rotation, normal counterclockwise rotation, and high-speed coun-
terclockwise rotation.
The motor torque varies in relation to rotation speed, requiring variation of the current
level, and the printer unit uses combinations of FEDI0 and FEDI1 signals to find the
appropriate current level for each motor speed.
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CHAPTER 5 PICK-UP/FEEDING SYSTEM
Table 5-202 shows the relationship between the combinations of FEDI0 and FEDI1
signal states and speeds:
FEDI0 FEDI1
Cassette 1 pick-up (normal CW) L L
Cassette 2 pick-up (1st sheet; normal
H L
CCW)
Cassette 2 pick-up (2nd sheet and after;
L H
high-speed CCW)
Stationary H H
Table 5-202
5-20 COPYRIGHT © 1999 CANON INC. CANON 660/2100 REV.0 FEB. 1999 PRINTED IN JAPAN (IMPRIME AU JAPON)
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CHAPTER 5 PICK-UP/FEEDING SYSTEM
A. Outline
The printer unit switches between face-up and face-down delivery paths using the
delivery flapper.
The face-up delivery roller and the face-down delivery roller are driven by the main
motor (M4); when the face-up solenoid drive signal (FUSLD*) goes ‘0’, the face-up sole-
noid (SL2) operates the face-up flapper so that it will face the face-up tray, delivering
paper to the face-up tray. When FUSLD* is ‘1’, on the other hand, paper will be delivered
to the face-down tray found at the top of the printer unit.
Paper on the face-down tray is checked by the face-down tray delivery sensor (PS11).
When the face-down tray becomes full of paper, the condition is identified by the face-
down tray full sensor (PS10).
DC controller PCB
q w e r
Face-down
delivery roller
M4
Face-up
delivery roller
SL2
Fixing
delivery Lower fixing roller
q : Face-up solenoid drive signal (FUSLD*) PS10: Face-down tray full sensor
w : Face-down tray delivery paper signal (FDOUT*) PS11: Face-down delivery paper sensor
e : Face-down full detection signal (FDFULL) SL2: Face-up solenoid
r : Main motor drive signal (MON*) M4: Main motor
Figure 5-301
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CHAPTER 5 PICK-UP/FEEDING SYSTEM
5-22 COPYRIGHT © 1999 CANON INC. CANON 660/2100 REV.0 FEB. 1999 PRINTED IN JAPAN (IMPRIME AU JAPON)
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CHAPTER 5 PICK-UP/FEEDING SYSTEM
DC control PCB
q w e r t y u i o
Duplexing
lower guide
Reversing
assembly
M8 Lower cassette
Figure 5-401
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CHAPTER 5 PICK-UP/FEEDING SYSTEM
qw e r t y u
!2 !1 !0 o i
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CHAPTER 5 PICK-UP/FEEDING SYSTEM
B. Reversing Operation
When the duplexing command arrives from the DC controller PCB, the duplexing dri-
ver PCB turns on the duplexing flapper solenoid (SL6), operating the duplexing flapper
so that paper will be moved to the duplexing unit.
When the leading edge of paper is detected by the reversal sensor (PS26), the
duplexing driver PCB rotates the duplexing motor (M8) counterclockwise (CCW; Note) to
move the paper to the machine’s reversing assembly.
Then, a specific period of time after the reversal paper sensor (PS26) has detected
the trailing edge of the paper, the duplexing driver PCB switches the rotation of the
duplexing motor (M8) to clockwise direction to switch the paper path so that paper will be
moved along the duplexing lower guide to the feeding roller side of the duplexing unit.
Note:
If paper is not 11x17, A3, B4, or LGL, the duplexing driver PCB first drives the duplex-
ing motor (M8) and then will switch its rotation to high speed to move the paper to the
reversing assembly.
PS26
Duplexing feeding roller 1
Reversing
roller
releasing Duplexing lower guide
plate
Duplexing unit
Reversing
assembly
M8 Duplexing motor
Rear
assembly M8 Duplexing motor
Figure 5-403
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CHAPTER 5 PICK-UP/FEEDING SYSTEM
Duplexing unit
ON
Figure 5-404
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CHAPTER 5 PICK-UP/FEEDING SYSTEM
When all is ready, the duplexing driver PCB drives the horizontal registration motor for
a specific number of pulses based on the paper size data from the DC controller PCB to
shift the horizontal registration guide according to the size of the paper for horizontal reg-
istration (Note).
The horizontal registration guide returns to its home position a specific period of time
after the leading edge of paper is moved and detected by the duplexing unit paper sen-
sor (PS24). The horizontal registration motor (M7) is a stepping motor, capable of con-
trolling the shift distance with high accuracy.
The duplexing driver PCB will identify a fault in the registration guide if the shift dis-
tance exceeds the value stored in advance (i.e., the distance the horizontal registration
guide moves from its home position), communicating the fact to the printer board*1 by
way of the DC controller PCB.
*1 Reader controller PCB (when making prints with the reader unit installed).
Reference:
E055: A fault in the drive of the duplexing unit horizontal registration guide.
Note:
If the paper is not A3, 11x17, A4R, LTRR, or B4, the horizontal registration guide must
move a longer distance. As such, the duplexing driver PCB drives the horizontal reg-
istration motor (M7) while the reversing roller is rotating counterclockwise to move the
horizontal registration guide to a point suited to the paper size.
COPYRIGHT © 1999 CANON INC. CANON 660/2100 REV.0 FEB. 1999 PRINTED IN JAPAN (IMPRIME AU JAPON) 5-27
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CHAPTER 5 PICK-UP/FEEDING SYSTEM
D. Re-Pickup
The duplexing driver PCB turns on the duplexing feeding clutch (CL5) at the end of
horizontal registration so as to move paper once gain.
About 0.5 sec after the duplexing unit paper sensor (PS24) has detected the leading
edge of paper, the duplexing driver PCB turns of the reversing roller releasing solenoid
(SL7; if the paper is not A4R, LTRR, or A5); about 1.0 sec later, it turns off the duplexing
feeding clutch (CL5). While keeping the paper at re-pickup wait position, the duplexing
driver PCB waits for a re-pickup command from the DC controller PCB.
When the re-pickup command is received from the DC controller PCB, the duplexing
driver PCB controls the speed of the duplexing motor (M8) so that it matches the
machine’s feeding speed; thereafter, it turns on the duplexing feeding clutch (CL5) to
move the paper to the machine’s feeding assembly.
M8
SL7 Reversing roller releasing solenoid
CL5
Duplexing upper guide
Duplexing unit
Reversing Duplexing feeding roller 1 paper sensor lever
roller
releasing Duplexing
plate Duplexing lower guide
feeding roller 2
Duplexing unit
OFF
Figure 5-405
5-28 COPYRIGHT © 1999 CANON INC. CANON 660/2100 REV.0 FEB. 1999 PRINTED IN JAPAN (IMPRIME AU JAPON)
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CHAPTER 5 PICK-UP/FEEDING SYSTEM
V. DETECTING JAMS
Face-down tray
delivery sensor
Face-down tray
PS11
Face-down
delivery
roller
Separation
sensor
Fixing delivery PS5 Registration paper
sensor sensor
PS19 Intermediate
transfer drum PS1
Face-up tray Upper
fixing roller Multifeeder
pick-up roller
Face-up
delivery roller Registration roller Feeding roller 2
Lower Transparency sensor
PS1802 PS17
fixing roller Transparency sensor Pick-up
Secondary PS1801 assembly
transfer belt Pick-up roller paper sensor
Cassette 1
Pick-up roller
Cassette 2
Figure 5-501
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CHAPTER 5 PICK-UP/FEEDING SYSTEM
5-30 COPYRIGHT © 1999 CANON INC. CANON 660/2100 REV.0 FEB. 1999 PRINTED IN JAPAN (IMPRIME AU JAPON)
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CHAPTER 5 PICK-UP/FEEDING SYSTEM
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CHAPTER 5 PICK-UP/FEEDING SYSTEM
Note:
T1 and T2 times represent minimum print size and maximum print size.
Normal Error
Reversal paper sensor
Figure 5-502
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CHAPTER 5 PICK-UP/FEEDING SYSTEM
T1 = about 3.2 sec for A4 (horizontal), about 6.3 sec for LDG.
Figure 5-503
T2 T2
Jam check
CCW CW CCW CW
Duplexing motor
T2 = about 1.7 sec for A4R, about 2.4 sec for 11x17.
figure 5-504
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CHAPTER 5 PICK-UP/FEEDING SYSTEM
VI.DISASSEMBLY/ASSEMBLY
Make sure of the following when disassembling or assembling the machine:
1. When the printer unit power switch is turned off, the fans will operate for about 30
min to cool the machine (so as to prevent caking of toner). Be sure to perform either
of the following in addition to disconnecting the power plug:
• Wait for 30 min after turning off the printer unit power switch; or
• Turn off the printer unit power switch, and remove the fixing assembly of the print-
er unit.
2. Assemble the parts by reversing the steps used to disassemble them, unless other-
wise mentioned.
3. Identify the screws by type (length, diameter) and location.
4. Do not leave out the toothed washer that comes with one of the mounting screws on
the rear cover to protect against static electricity.
5. Do not leave out the washer that comes with the screw used for the grounding wire
and the varistor to ensure electrical continuity.
6. Do not operate the machine with any of its parts removed, unless otherwise men-
tioned.
7. Do not throw a toner cartridge into fire. It may explode.
8. Keep any toner cartridge in a protective cover whenever it has been taken out of the
printer unit for disassembly/assembly work even for a short time.
9. Remove the cartridge and the intermediate transfer drum before disassembly/assem-
bly work or moving the machine.
10. Touch the copier’s metal section before starting the work to discharge the build-up of
static electricity so as to prevent static damage before handling any PCBs.
11. To slide out the printer unit from the rack (if the reader unit is also mounted to the
rack), pull halfway out the two side pins at the bottom of the rack (middle pin orienta-
tion *), and then remove the printer unit fixing member from the left of the printer unit.
Be sure also to remove the printer side power cord and the interface cable.
For removal of the external covers of the printer unit, see IV.A. “External Covers of the
Printer Unit” in Chapter 3.
5-34 COPYRIGHT © 1999 CANON INC. CANON 660/2100 REV.0 FEB. 1999 PRINTED IN JAPAN (IMPRIME AU JAPON)
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CHAPTER 5 PICK-UP/FEEDING SYSTEM
q Screws
q
w Pick-up cassette cover
Figure 5-602
q Strap
Figure 5-601
q
q Connector
w DC control PCB
Figure 5-603
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CHAPTER 5 PICK-UP/FEEDING SYSTEM
q q
q Screws
w Pick-up assembly
Figure 5-604
Note:
1. If you are replacing any of the parts
of the pick-up assembly, be sure to
remove the pick-up roller, feeding
roller, and separation roller first to
avoid soiling them with grease.
Further, take care not to soil the
paper feeding guide with grease.
2. If you are replacing the gears shown
in Figure 5-605, be sure to apply
grease to prevent abnormal noise.
Use the appropriate grease (SHV-
2), and never use any that is not rec-
ommended.
To apply, put a small amount (size of
a small bean) over three or more
contiguous teeth.
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CHAPTER 5 PICK-UP/FEEDING SYSTEM
4
6
q 57T gear
w Lift-up cam
e Pick-up cam
r 100T gear
t Lift-up cam (lower)
y 31T/47T gear
u 20T/41T gear
Figure 5-605
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CHAPTER 5 PICK-UP/FEEDING SYSTEM
2. Removing the Pick-Up Motor 4) Remove the E-shaped stop ring, and
1) Disconnect the connector. detach the feeding clutch.
2) Remove the two screws, and slide the
pick-up motor in the direction of the
arrow to detach. q e
e
w
w
r
q
w
w
r q
e
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CHAPTER 5 PICK-UP/FEEDING SYSTEM
e
w
w
q Screws
w Delivery assembly
Figure 5-611
q Screws w Connector
e Upper stay
Figure 5-610
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CHAPTER 5 PICK-UP/FEEDING SYSTEM
w w
Figure 5-612
q q
Figure 5-613
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CHAPTER 5 PICK-UP/FEEDING SYSTEM
w r
w
q
Caution: q
When replacing each part of the regis-
tration roller assembly, take extra care w
not to touch the sensor window.
q Spring
w E-shaped stop ring
e Bushing
Figure 5-617
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CHAPTER 5 PICK-UP/FEEDING SYSTEM
t w
r
w
q
q Claw w Gear
q
e Spring
r E-shaped stop ring
t Bushing
y Registration lower roller
Figure 5-618
q Connector
w DC controller PCB
Figure 5-619
q Screw w Claws
e Gear cover
Figure 5-620
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CHAPTER 5 PICK-UP/FEEDING SYSTEM
7) Extend the rod, and remove it from the 9) Remove the E-shaped stop ring.
rod holder of the multifeeder pick-up
assembly.
q
w
q Screw
w Rod holder cover q Fixing hook
w Multifeeder pick-up assembly
Figure 5-622
Figure 5-624
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CHAPTER 5 PICK-UP/FEEDING SYSTEM
r w
q
q Screws w Connector
e Claws
r Multifeeder pick-up assembly
e
Figure 5-625
q Holding plate
w Multifeeder separation pad
e Multifeeder pick-up roller
Figure 5-626
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CHAPTER 5 PICK-UP/FEEDING SYSTEM
q Separation pad
Figure 5-627
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CHAPTER 5 PICK-UP/FEEDING SYSTEM
e
r
e
q q
w e w
Figure 5-630
Note:
When replacing the cassette feeding
roller or the cassette separation roller,
be sure to replace them at the same
time.
5-46 COPYRIGHT © 1999 CANON INC. CANON 660/2100 REV.0 FEB. 1999 PRINTED IN JAPAN (IMPRIME AU JAPON)
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CHAPTER 5 PICK-UP/FEEDING SYSTEM
q
q
e
w
w
q
q Claws w Connector
e Cassette 1 last sheet sensor
q Sub tray w Claws
Figure 5-632
Figure 5-633
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CHAPTER 5 PICK-UP/FEEDING SYSTEM
e
q
q Screw w Connector
e Multifeeder tray paper width detection
PCB
Figure 5-634
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CHAPTER 6
FIXING SYSTEM
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CHAPTER 6 FIXING SYSTEM
I. OUTLINE
The upper fixing roller, lower roller, and fixing delivery roller are driven by the main
motor (M4).
Paper separated from the intermediate transfer drum is fed inside the fixing assem-
bly, moved between upper and lower fixing rollers and past the fixing delivery roller to the
outside of the fixing assembly.
Paper coming out of the fixing assembly is detected by the fixing delivery sensor
(PS1903).
DC controller PCB
q w
M4
SL2
Fixing
delivery
roller Lower fixing roller
q : Fixing delivery paper detection signal (FXOUTS*) PS1903: Fixing delivery sensor
w : Main motor drive signal M4: Main motor
Figure 6-101
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CHAPTER 6 FIXING SYSTEM
Expansion
+5V I/O
FXUON 21
FXUONS 22
FXLON 23
FXLONS 24
Sub driver circuit
+5V IC203
FXTHL
FXTHU
Figure 6-201
The fixing temperature is monitored by the upper thermistor (THU) mounted on the
upper fixing roller and the lower thermistor (THL) mounted on the lower fixing roller.
When the surface temperature of the upper fixing roller and the lower fixing roller
increases, the resistance of THU and THL will decrease, gradually lowering the voltage
of the fixing temperature detection signal (FXTHU, FXTHL) sent to the M-CPU (IC202)
on the DC controller PCB.
The M-CPU on the DC controller PCB controls the fixing heater drive signal (FXUON,
FXLON) according to the voltage of the FXTHU and FXTHL signals and through the
expansion I/O (IC203) so that the fixing temperature remains a specific value.
6-2 COPYRIGHT © 1999 CANON INC. CANON 660/2100 REV.0 FEB. 1999 PRINTED IN JAPAN (IMPRIME AU JAPON)
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CHAPTER 6 FIXING SYSTEM
Reference:
The voltage is highest in the reader unit while the scanner is moved in reverse during
printing operation with the reader unit installed. As such, the fixing heater is turned off.
Note:
Fixing Mode
The printer unit sets the target temperature for the upper/lower fixing roller as follows
according to the mode communicated by the printer board*1:
Fixing mode
Color mode Plain paper Transpar- Thick paper Envelope Special fixing
Target temperature mode ency mode mode mode mode
Full-color 180°C 175°C 175°C 185°C 180°C
Mono-color 180°C 175°C 175°C 185°C 180°C
Table 6-201
*1 Reader controller PCB (when making prints with the reader unit installed).
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CHAPTER 6 FIXING SYSTEM
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CHAPTER 6 FIXING SYSTEM
e. The sensitivity of the thermsitor (Note 2) is on the high temperature side at power-on
(during initial state), but the upper and lower fixing roller detection signals (FXTHU,
FXTHL) are 60°C or less. The thermistor sensitivity is switched from the high to the
lower temperature side.
At this time, either FXTHU or FXTHL is -10°C or less. (thermistor open circuit)
However, if both FXTHU and FXTHL are -10°C or less, the absence of the fixing
assembly will be indicated (E813).
Caution:
1. If an error high or low temperature is detected, the M-CPU uses the D-CPU to store
a fixing heater error in the error memory capacitor (C259).
Once this happens, turn off the power once, leave the printer unit alone for 30 min
or more, and turn on the power once again to reset the printer unit.
2. Switching the Thermistor Sensitivity
The machine’s M-PCU switches the thermistor sensitivity (between low-tempera-
ture sensitive mode and high-temperature sensitive mode) to ensure accurate
detection regardless of the range of temperature (low or high) using the thermistor
sensitivity switch signal (FXSEL). When the FXSEL signal is ‘0’, the thermistor will
be in low-temperature detection mode; when ‘1’, high-temperature detection mode.
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CHAPTER 6 FIXING SYSTEM
2. Fixing Heater Safety Circuit (on the power supply circuit; E808)
The fixing heater safety circuit is found in the power supply assembly, and serves to
check the upper and lower fixing heaters for a fault.
a. When the fixing heater safety circuit finds a fault in the upper fixing heater,
If the fixing temperature increases abnormally, the power from the power supply
assembly to the upper/lower heater will be cut off.
DC control PCB
RL101
THU FXSTS 60
Upper thermistor M-CPU
Q101
Upper Upper fixing T101 IC202
thermal roller 31 30
switch FXUON
FXUONS +5V
Lower Fixing heater
thermal drive circuit
switch +5V Q203
+5V IC102
Lower IC102
fixing roller 10
9
14 Q20
13
THL 11
8
+5V Q204
Lower
thermistor Fixing assembly BUS
Q112
error detection FXSEL
circuit
Q111
Expansion
I/O
21
22
12 10 5 FXLON 23
10
Fixing heater 13 FXLONS 24
safety circuit 14 FXRON 20
IC101 11
6 2 15 9 18
14
FXTYP 96
8 +5V IC203
FXRON
97 19
+5V
Q237
ACTYP
JP1
FXTHL FXENB
FXTHU
Figure 6-202
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CHAPTER 6 FIXING SYSTEM
See Figure 6-202 and the following text for the functions of the circuit:
The fixing heater safety circuit in the power supply monitors the upper fixing roller
temperature detection signal (FXTHU) at pin No. 14. When increases in the fixing tem-
perature causes the output voltage of the upper thermistor to be about 1.4 V, the output
of pin No. 13 of IC101 goes ‘1’, and the signal at pin No. 14 of the fixing heater safety cir-
cuit will be ‘1’. In response, the fixing heater safety circuit causes the output of pin No. 5
to go ‘0’.
Then, Q111 of the fixing assembly error detection circuit turns off to turn off Q112 and
thereby to turn off the relay (RL101), cutting off the power to the upper fixing heater and
the lower fixing heater.
b. If the fixing heater safety circuit finds a fault in the lower fixing heater,
The fixing heater safety circuit is in the power supply and, if an abnormal increase
occurs in the fixing temperature, it cuts off the power to the upper and lower fixing
heaters.
See Figure 6-202 and the following text for the functions of the circuit:
The fixing heater safety circuit in the power supply monitors the lower fixing roller tem-
perature detection signal (FXTHL) at pin No. 14. When increases in the fixing tempera-
ture causes the output voltage of the upper thermistor to be about 1.4 V, the output of pin
No. 9 of IC101 goes ‘1’, and the signal at pin No. 14 of the fixing heater safety circuit will
be ‘1’. In response, the fixing heater safety circuit causes the output of pin No. 5 to go ‘0’.
Then, Q111 of the fixing assembly error detection circuit turns off to turn off Q112 and
thereby to turn off the relay (RL101), cutting off the power to the upper fixing heater and
the lower fixing heater.
3. Fixing Assembly Error Detection Circuit (in the power supply circuit)
This circuit is in the power supply, and monitors the fixing assembly for an open con-
dition of the thermal switch and the fixing heater for an open circuit.
a. Displaced Fixing Assembly (E009)
The fixing assembly error detection circuit checks to find out whether the rated volt-
age of the power supply and the rated voltage of the fixing assembly match. For instance,
if a 100-V power supply and a 220V fixing assembly are connected, it will identify a rated
voltage mismatch. If the fixing assembly is not mounted, the expansion I/O (IC203) on the
DC controller PCB will assume a fixing assembly type mismatch, and communicates the
fact to the printer board*1 to stop the operation of the printer unit.
The rated voltage of the power supply is set by means of a jumper wire (JP1; for a
100V power supply, JP1 is open, while JP1 is shorted for a 200V power supply). The set-
ting is monitored by the expansion I/O using the power supply type detection signal
(ACTYP).
The rated voltage of the fixing assembly, on the other hand, is set by means of a
jumper wire (JP2) inside the fixing assembly (for a 100-V fixing assembly, JP2 is open,
while it is shorted for a 200-V model). The setting is monitored by the expansion I/O as
the fixing assembly type detection signal (FXTYP).
If the rated voltage of the power supply and the rated voltage of the fixing assembly
do not match, the expansion I/O will identify the condition as displacement of the fixing
assembly.
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CHAPTER 6 FIXING SYSTEM
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CHAPTER 6 FIXING SYSTEM
III. DISASSEMBLY/ASSEMBLY
Make sure of the following when disassembling or assembling the machine:
1. When the printer unit power switch is turned off, the fans will operate for about 30
min to cool the machine (so as to prevent caking of toner). Be sure to perform either
of the following in addition to disconnecting the power plug:
• Wait for 30 min after turning off the printer unit power switch; or
• Turn off the printer unit power switch, and remove the fixing assembly of the printer
unit.
2. Assemble the parts by reversing the steps used to disassemble them, unless other-
wise mentioned.
3. Identify the screws by type (length, diameter) and location.
4. Do not leave out the toothed washer that comes with one of the mounting screws on
the rear cover to protect against static electricity.
5. Do not leave out the washer that comes with the screw used for the grounding wire
and the varistor to ensure electrical continuity.
6. Do not operate the machine with any of its parts removed, unless otherwise men-
tioned.
7. Do not throw a toner cartridge into fire. It may explode.
8. Keep any toner cartridge in a protective cover whenever it has been taken out of the
printer unit for disassembly/assembly work even for a short time.
9. Remove the cartridge and the intermediate transfer drum before disassembly/assem-
bly work or moving the machine.
10. Touch the copier’s metal section before starting the work to discharge the build-up of
static electricity so as to prevent static damage before handling any PCBs.
11. To slide out the printer unit from the rack (if the reader unit is also mounted to the
rack), pull halfway out the two side pins at the bottom of the rack (middle pin orienta-
tion *), and then remove the printer unit fixing member from the left of the printer unit.
Be sure also to remove the printer side power cord and the interface cable.
For removal of the external covers of the printer unit, see IV.A. “External Covers of the
Printer Unit” in Chapter 3.
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CHAPTER 6 FIXING SYSTEM
A. Fixing Assembly
1. Construction
The fixing assembly serves to fuse
toner into the fibers of paper, and con-
structed as shown in Figure 6-301 (cross
sectional view). q w e r
!0 o i
Figure 6-301
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CHAPTER 6 FIXING SYSTEM
q Figure 6-304
e
w
Figure 6-302
Figure 6-303
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CHAPTER 6 FIXING SYSTEM
4) Push down the fixing assembly 1 to 2) Remove the three screws, and detach
place it correctly. Then, shift up the the upper thermal switch.
levers 2 to secure it in place.
q
w
w
Figure 6-308
Figure 6-306
Figure 6-307
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CHAPTER 6 FIXING SYSTEM
3) While pushing the claws with a high- 5) Remove the screw, and detach the
accuracy screwdriver, pull up the fix- upper thermistor.
ing assembly inlet guide to the front to
detach.
q
w
q
q Claw
w Fixing assembly inlet guide
q Screw
Figure 6-310 w Upper thermistor
q Connector
Figure 6-311
w e r
q
Figure 6-313
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CHAPTER 6 FIXING SYSTEM
2) Remove the two screws, and detach 7. Removing the Lower Thermal
the thermal switch cover. Switch
1) Perform steps 1) through 6) on p. 6-17
q to remove the fixing assembly right
cover.
2) Disconnect the connector (lack).
q Screws
w Thermal switch cover
q
Figure 6-314
q Connector
3) Remove the three screws, and detach
the lower thermal switch. Figure 6-316
q Screws w
w Lower thermal switch
Figure 6-317
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CHAPTER 6 FIXING SYSTEM
4) Slide the fixing assembly lower cover 8. Removing the Upper Fixing Heater
to the right to detach. 1) Perform steps 1) on p. 6-12 to remove
the fixing cover 1.
2) Remove the screw, and detach the
q lead wire.
q
w
q Lower cover
Figure 6-318
Figure 6-321
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CHAPTER 6 FIXING SYSTEM
4) Remove the two screws, and pull out 9. Removing the Lower Fixing Heater
the connector; then, pull out the lead 1) Perform step 1 on p. 6-12 to remove
wire. the fixing cover 1.
2) Remove the screw, and detach the
lead wire.
w
e
q Screws w Connector w
e Lead wire q
Figure 6-322
Figure 6-325
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CHAPTER 6 FIXING SYSTEM
4) Remove the two screws, and pull out Points to Note When Mounting
the connector; then, pull out the lead When securing the lead wire terminal
wire. of the fixing heater or the like with a
screw, take care not to subject the lead
wire to excess force.
q Screw w Connector
e Lead wire q
Figure 6-326
Figure 6-328
q
e
Figure 6-327
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CHAPTER 6 FIXING SYSTEM
5) Remove the two screws, and detach 7) Remove the grounding ring; then,
the two lead wires and the two contact remove the C-shaped stop ring.
plates.
w
q
w
e
q
6) Remove the two screws, and detach 8) Remove the gear; then, remove the
the fixing assembly right cover. bushing and the bearing.
q
w
q Screws
w Fixing assembly right cover
Figure 6-330
q Gear w Bushing
e Bearing
Figure 6-332
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CHAPTER 6 FIXING SYSTEM
9) Remove the screw, and detach the 11)Remove the two screws, and detach
thermal holder together with the upper the fixing assembly upper safety.
thermal switch.
q
q
w
w
q Screw w Thermal holder
w q
q
w
q Screws
w Fixing assembly left cover
e r
Figure 6-334
Figure 6-336
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CHAPTER 6 FIXING SYSTEM
11. Removing the Fixing Assembly 4) Remove the bushing and the bearing.
Lower Roller
1) Perform the steps on p. 6-17 to
remove the upper fixing roller.
2) Remove the C-shaped stop ring, and
remove the bushing and the bearing.
q Bushing w Bearing
w Figure 6-339
e
5) Remove the two screws, and detach
the two upper separation guides; then,
q C-shaped stop ring detach the lower fixing roller.
w Bushing
e Bearing
w e
Figure 6-337
q Screws
w Upper separation guides
e Lower fixing roller
q
Figure 6-340
w
q Grounding ring
w C-shaped stop ring
Figure 6-338
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CHAPTER 7
EXTERNALS/AUXILIARY MECHANISMS
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CHAPTER 7 EXTERNALS/AUXILIARY MECHANISMS
I. CONTROL PANEL
A. Outline
The printer unit’s control panel has ten LEDS, one LCD, eight switches, and one
buzzer.
The control panel is connected to the printer board, and has the following functions:
• Using the LCD, indicates printer unit status and errors.
• Using the LEDs, indicates printer unit operations.
• In response to a switch input, selects a printing environment, operation mode,
utility, and pick-up/delivery slot.
• In response to a faulty switch input, sounds the buzzer.
Figure 7-101
B. Operations
The control panel uses a single-line, dual-direction serial interface.
The ASIC on the printer board serves to exchange data between the control panel
and the CPU. The data to the LEDs, LCD, and buzzer on the control panel and the vari-
ous data occurring as a result of switch inputs are controlled by the FPI* signal (bi-direc-
tional data).
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CHAPTER 7 EXTERNALS/AUXILIARY MECHANISMS
II. FANS
The printer unit is equipped with three fans to cool the inside and to discharge ozone.
Figure 7-101 shows the arrangement of the fans. Table 7-101 shows the functions of
the fans, filters used by the fans, orientation of the fans, and error codes associated with
the operation of the fans, while Figure 7-102 shows the timing at which each fan is turned
on.
FM2
FM1
FM3
Figure 7-201
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CHAPTER 7 EXTERNALS/AUXILIARY MECHANISMS
Table 7-201
30 min
(approx.)
Heat discharge fan 1
Figure 7-202
Note:
1. At the end of a printing run, the heat discharge fan 3 (FM3) stops once. However,
the heat discharge fan 2 (FM2) will stop 30 min after the printer unit power switch
is turned off to prevent increase in temperature inside the printer unit.
2. The heat discharge fan 1 (FM1) is equipped with a built-in thermistor used as part
of the mechanism to vary the rotation speed of the fans to suit the machine inter-
nal temperature.
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CHAPTER 7 EXTERNALS/AUXILIARY MECHANISMS
A. Power Supply
The low-voltage power supply circuit in the power supply generates +24 VB and +5 V
DC power needed by the printer unit.
+24 VB is used as it is as the source of power by the heat discharge fan 1 and the
heat discharge fan 2.
+24 VB, further, is also sent through each cover switch and is turned into +24 VAR
supplied to the developing rotary motor PCB and +24 UH (Note) supplied to each PCB
by way of the FET switch on the main relay PCB.
+24 VAR is used as the source of power by the color developing rotary motor and
solenoids, while +24 UH is used by loads and PCBs.
+5 V is supplied to the DC controller PCB as its source of power. The DC controller
PCB uses +5 V to generate the PSAVE* and P5SAVE signal, causing PSAVE* to go ‘0’
in response to a power save command, thereby turning off the FET switch and, ultimate-
ly, cutting +24 UH. At this time, the sensors will also be deprived of power, since P5SAVE
is also used by the sensors.
+5 V is also used to generate the +5 R signal to supply the printer board with 5 V
power.
The low-voltage power supply circuit monitors the 5 VS signal fed back by the DC con-
troller PCB to ensure that 5 V supplied to the printer board remains at a correct level.
Note:
+24 UH is 24 V sent through the right cover switch and the delivery cover/front cover
switch and then through the FET switch; the 24 V power supplied to the heat discharge
fan 3 and the pre-exposure LED without being lead through the FET switch is also
called +24 UH.
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CHAPTER 7 EXTERNALS/AUXILIARY MECHANISMS
Power supply
Delivery cover/front
SW642
cover switch
Drum
cartridge
detecting
switch SW671
FET
switch
P5SAVE
+24VAR
+24VB
P5SAVE
+24UH
+24UH
+24UH
+24UH
P5SAVE
High-voltage
/P5SAVE
High- Developing
PCB2/ Pick-up voltage
separation
Loads rotary motor Sensor
PCB PCB 1
static PCB
+24VAR
+24UH
elimination
+24UH
+24UH
+24VB
high-voltage
PCB
P5SAVE
up motor motor
discharge fan 2 motor/solenoid PCB
Heat discharge
Laser driver fan 3/pre-exposure
Sensor Printer
sensor/BD LED assembly
board
PCB
Figure 7-301
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CHAPTER 7 EXTERNALS/AUXILIARY MECHANISMS
B. Remote Switch
When the machine’s printer unit power switch is turned off, the low-voltage power sup-
ply circuit sends the power-off signal (POFF) to the DC controller PCB. Thereafter, when
the printer unit is ready for power-off, the DC controller PCB causes the power-off con-
trol signal (PCONT) to go ‘1’, thereby turning off the switching transistor of the power sup-
ply circuit to stop +5 V and +24 VB power.
This condition will turn off +5 R, PSAVE* and P5SAVE of the +5 V system and +24
VAR and +24 UH of the +24 VB system.
Rectification
circuit
Anti-rush 24 V overvoltage
current circuit detection circuit
Switching Rectification
Transformer
transistor circuit
24 V overcurrent
detection circuit DC-DC
Regulator IC
Rectification converter
Control IC
smoothing
circuit
Power
+5VS 5V
supply
overcurrent/
switch
overvoltage
Photo Photo
+24VB
/PSAVE
P5SAVE
+24UH
+24UH
+24VB
+24VB
P5SAVE
+24UH
+24UH
+5R
+5V
High-voltage
PCB2/ Pick-up Laser Printer Developing Sub relay High- Pre-
separation PCB driver/sensor/ board rotary PCB PCB voltage exposure
static eliminator BD PCB PCB 1 LED relay
high-voltage PCB
PCB
Figure 7-302
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CHAPTER 7 EXTERNALS/AUXILIARY MECHANISMS
C. Protective Mechanisms
The +24 VB power supply circuit and the +5 V power supply circuit are equipped with
an overcurrent protective mechanism and an overvoltage protective function, which auto-
matically shuts off output voltage to prevent damage to the power supply circuits in the
event that a load should suffer a short circuit or overcurrent/overvoltage.
If the overcurrent protective mechanism or the overvoltage protective mechanism
turns on to cut of the DC voltage from the low-voltage power supply circuit, turn off the
power switch, disconnect the power cable, and correct the fault on the load in question;
then, connect the power cable, and turn on the power switch.
The circuit is quipped with a circuit breaker (CB101) and a fuse (F1), which shut off
the output voltage in response to overcurrent (i.e., CB101 turns off). If such has occurred,
wait about 60 sec and then turn on the power once again.
Note that an overvoltage blows F1 to shut off the power.
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CHAPTER 7 EXTERNALS/AUXILIARY MECHANISMS
(IC201) D-CPU
PSAVE*
Switching
circuit
FET
switch
P5SAVE
+24VAR
+24UH
+24VB
+24UH
P5SAVE
+24UH
+24UH
P5SAVE
P5SAVE
High-voltage High- Developing
Pick-up voltage
PCB2/ Loads rotary motor Sensor
PCB PCB 1
separation PCB
Sensor
+24VAR
static elimination
+24UH
+24UH
+24VB
+24UH
high-voltage
PCB
P5SAVE
Heat discharge
Laser driver/ fan 3/
Sensor sensor BD Printer
board Pre-exposure
PCB LED assembly
Figure 7-303
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CHAPTER 7 EXTERNALS/AUXILIARY MECHANISMS
IV. DISASSEMBLY/ASSEMBLY
Make sure of the following when disassembling or assembling the machine:
1. When the printer unit power switch is turned off, the fans will operate for about 30 min
to cool the machine (so as to prevent caking of toner). Be sure to perform either of the
following in addition to disconnecting the power plug:
• Wait for 30 min after turning off the printer unit power switch; or
• Turn off the printer unit power switch, and remove the fixing assembly of the printer
unit.
2. Assemble the parts by reversing the steps used to disassemble them, unless other-
wise mentioned.
3. Identify the screws by type (length, diameter) and location.
4. Do not leave out the toothed washer that comes with one of the mounting screws on
the rear cover to protect against static electricity.
5. Do not leave out the washer that comes with the screw used for the grounding wire
and the varistor to ensure electrical continuity.
6. Do not operate the machine with any of its parts removed, unless otherwise men-
tioned.
7. Do not throw a toner cartridge into fire. It may explode.
8. Keep any toner cartridge in a protective cover whenever it has been taken out of the
printer unit for disassembly/assembly work even for a short time.
9. Remove the cartridge and the intermediate transfer drum before disassembly/assem-
bly work or moving the machine.
10. Touch the copier’s metal section before starting the work to discharge the build-up of
static electricity so as to prevent static damage before handling any PCBs.
11. To slide out the printer unit from the rack (if the reader unit is also mounted to the
rack), pull halfway out the two side pins at the bottom of the rack (middle pin orienta-
tion *), and then remove the printer unit fixing member from the left of the printer unit.
Be sure also to remove the printer side power cord and the interface cable.
For removal of the external covers of the printer unit, see IV.A. “External Covers of the
Printer Unit” in Chapter 3.
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CHAPTER 7 EXTERNALS/AUXILIARY MECHANISMS
Figure 7-404
q w
Caution:
When replacing the fan, take care not
q Grip lever w Thermistor holder to touch the surface of the thermistor.
Figure 7-402 Caution:
When mounting the heat discharge
fan, be sure that the logo of the manu-
facturer is toward the outside of the
printer unit.
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CHAPTER 7 EXTERNALS/AUXILIARY MECHANISMS
2. Removing the Heat Discharge Fan 2) Disengage the two claws, and detach
(FM2; printer unit) the duct cover.
1) Perform the steps on p. 3-16 to
remove the rear cover.
2) Disconnect the connector, and disen- w
gage the two claws; then, detach the
heat discharge fan 2.
q
q
Figure 7-405
Caution:
When mounting the heat discharge
fan, be sure that the logo of the manu-
facturer is toward the outside of the q
printer unit.
q Heat discharge fan 3
3. Removing the Heat Discharge Fan
(FM3; printer unit) Figure 7-407
1) Perform steps 1) through 5) on p. 3-18
to remove the right cover together with
the fan duct. Caution:
When mounting the heat discharge
fan, be sure that the logo of the manu-
facturer is toward the outside of the
printer unit.
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CHAPTER 7 EXTERNALS/AUXILIARY MECHANISMS
4. Replacing the Air Filter (FM1/2) 5. Replacing the Ozone Filter (FM3)
1) Open the exhaust vent of the printer 1) Open the right cover of the printer
unit. unit.
Figure 7-410
Figure 7-408
2) Slide the lid of the ozone filter holder.
2) Remove the existing air filters. Slide.
Lid
Figure 7-411
Air filters
Figure 7-409
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CHAPTER 7 EXTERNALS/AUXILIARY MECHANISMS
Figure 7-412
Figure 7-413
q w e
q Screws w Connectors
e Power supply assembly
Figure 7-414
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CHAPTER 8
INSTALLATION
This chapter provides instructions on how to install the machine and its accessories.
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CHAPTER 8 INSTALLATION
Humidity
(%RH)
80
60
40
20
10
0 10 15 20 27.5 30 °C
(32) (50) (59) (68) (81.5)(86) (˚F)
Temperature
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CHAPTER 8 INSTALLATION
3. Avoid areas near a source of fire, areas subjected to dust or ammonium gas, and
areas exposed to direct sunshine. As necessary, provide curtains.
4. Make sure the room will be kept well-ventilated.
Note:
The level of ozone generated by the machine will not affect the health of the individu-
als working around it. Some individuals, however, may find the odor to be unpleasant
if the machine is used for a long time in a poorly ventilated room, indicating the impor-
tance of ventilation.
5. Be sure that the machine’s feet will remain in contact with the floor, and the printer
unit will remain level.
6. Be sure that there will be adequate space around the printer unit for maintenance and
other work.
2450mm
1850mm
Figure 8-102
100mm min.
1070mm
1245.1mm
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CHAPTER 8 INSTALLATION
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CHAPTER 8 INSTALLATION
2
3
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CHAPTER 8 INSTALLATION
Protective film
Drive releasing lever
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CHAPTER 8 INSTALLATION
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CHAPTER 8 INSTALLATION
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CHAPTER 8 INSTALLATION
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CHAPTER 8 INSTALLATION
19 Look in the color toner replacement cover to Color toner replacement cover
make sure that the color of the color marker
on the turret is yellow. (If not, press the turret
button unit it is yellow.)
Color marker
Turret button
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CHAPTER 8 INSTALLATION
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CHAPTER 8 INSTALLATION
Stopper
2
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CHAPTER 8 INSTALLATION
Unlocking position
1
Locking position
Locking lever
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CHAPTER 8 INSTALLATION
Stack limit
marking
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CHAPTER 8 INSTALLATION
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CHAPTER 8 INSTALLATION
Caution:
• If the jumper head is not fitted to J27, the menu for ‘CHANGE DEFAULT LOCALE:’
will not appear during the above procedure.
• Do not change any items except ‘CHANGE DEFAULT LOCALE:’.
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CHAPTER 8 INSTALLATION
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CHAPTER 8 INSTALLATION
Caution:
The areas near the fixing assembly
and the delivery assembly behind the
printer unit delivery cover are hot, pos-
sibly burning the skin upon contact.
If the printer unit has been used, turn it
off, and wait for a while for its inside to
cool before starting the work.
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CHAPTER 8 INSTALLATION
Caution:
Do not push on the metal plate at the
back of the duplexing unit; otherwise,
the plate may deform to cause pick-up
faults or jams.
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CHAPTER 8 INSTALLATION
Caution:
Do not push on the metal plate found
at the back of the duplexing unit; oth-
erwise, the plate may deform to cause
pick-up faults or jams.
Locking lever
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CHAPTER 8 INSTALLATION
Blue lever
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CHAPTER 8 INSTALLATION
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CHAPTER 9
MAINTENACE AND SERVICING
This chapter discusses those of the machine’s parts that require inspection and main-
tenance.
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CHAPTER 9 MAINTENANCE AND SERVICING
The values are estimates only and are subject to change based on future data.
Note:
The toner catch tray must be cleaned to prevent caking of toner by the heat from fix-
ing. Replace the tray only when the cake of toner cannot be removed.
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CHAPTER 9 MAINTENANCE AND SERVICING
Items to Clean
Unit Part Remarks
Multifeeder roller
Cassette pick-up roller
Feeding roller 1 Use lint-free paper or alcohol.
Feeding roller 2
Separation roller
Separation pad Use lint-free paper.
Use lint-free paper. If the dirt cannot
Pick-up feeding be removed, use alcohol on the
rubber area and solvent on other
Registration roller assembly
areas.
Do not remove the spring when
cleaning; a displaced spring will
cause skew movement of paper or
jams. Correct the spring if displaced.
Separation guide Use lint-free paper.
Transparency sensor 1/2 Use a blower brush.
Sub cover sheet Use lint-free paper or alcohol.
Development
Toner catch tray Remove any cake of toner.
Fixing assembly inlet guide Use solvent.
Fixing assem-
bly Upper/lower fixing separation Use solvent to remove cakes of
guide toner. (Do not force.)
Intermediate Density sensor
Use the special brush.
transfer drum Pre-exposure LED assembly
Secondary pre-transfer charging
Charging assembly Use a cleaning lever.
assembly
Separation static assembly
Note:
1. As a rule, do not clean the following:
• ITD cleaning roller
• Photosensitive drum cartridge
• Secondary transfer belt assembly
2. The surface of the intermediate transfer drum may develop condensation during
installation work. If such happens, dry wipe the surface with lint-free paper. If the
output images are soiled, suspect dirt on the surface of the intermediate transfer
drum. To correct, wipe it with a flannel cloth moistened with water, and then dry
wipe it with lint-free paper.
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CHAPTER 9 MAINTENANCE AND SERVICING
Work as follows:
Item Description
Density sensor Use the density sensor cleaning brush attached to the printer unit to
Pre-exposure LED clean the detecting window of the sensor. For the pre-exposure LED
assembly assembly, move the same brush in the direction of the arrow to clean
each LED.
Cleaning brush
Detecting
window
Registration roller When replacing each drum cartridge, clean the registration roller
assembly assembly.
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CHAPTER 9 MAINTENANCE AND SERVICING
Item Description
Separation static Remove the separation static eliminator from the printer unit. Then,
eliminating move the cleaning lever in the direction of the arrow several times to
clean it.
Cleaning lever
Note:
After cleaning, be sure to fit the cleaning lever in the static elim-
inator before mounting it back to the printer unit.
Secondary pre- Move the cleaning handle of the secondary pre-transfer charging
transfer charging assembly in the direction of the arrow several times to clean the sec-
assembly ondary pre-transfer charging assembly
Marking
Intermediate
transfer drum
Note:
After cleaning, be sure to move the cleaning handle of the sec-
ondary pre-transfer charging assembly to the right end where
a marking is found.
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CHAPTER 9 MAINTENANCE AND SERVICING
Item Description
Toner catch tray Disengage the two claws of the toner catch tray cover, and slid out
the toner catch tray.
Toner catch
cover
Claws
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CHAPTER 10
TROUBLESHOOTING
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Guide to Tables
The tables used in this Service Handbook have been prepared from flow charts; study
the sample table below.
AC power is absent.
Cause Step Check Yes/No Action
Power plug 1 Is the power plug connected to the NO Connect the plug.
outlet?
Covers 2 Are the front door and/or delivery NO Close the door and/or
cover closed properly? cover properly.
Power source 3 Is the rated voltage (100 VAC) pre- NO The problem is not of
sent at the outlet? the copying machine;
advise the user.
4 Is the rated voltage present between YES Check step 6) and
J 1-1 and J 1-2? onward.
■ To find the cause (faulty part) for a single problem, see the items under “Cause.” For
“AC power is absent,” the cause may be the power plug, covers, or power source.
■ To find checks to make or actions to take for a single problem, make checks in the
order given, answer the question Yes or No, and take the action given; move onto the
next step as necessary.
Step Check Result Action
Is the power
plug con- NO Connect the
1
nected to the piug.
outlet?
YES
YES
YES
■ Checks on the voltage using a tester call for special note; the description “Check the
voltage between J 109-1 (+) and J 109 (-) on the DC controller PCB” means that the
positive probe of the tester should be connected to J 109-1 (+) and the negative probe,
to J 109-2 (-).
■ The left door switch goes OFF and, at the same time, the laser shutter closes as
soon as the front left door is opened; as such, put the door switch actuators into left
door switch and laser shutter if the machine needs to be opened with its front left
door open. DO NOT BLOCK THE LASER PATH WITH LIGHT REFLECTING
OBJECTS.
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CHAPTER 10 TROUBLESHOOTING
A. Electrical System
• Without the Reader Unit Installed (with the printer board installed)
1) Connect the power plug to the power outlet; and while holding on the “Menu key,
Enter/Online key, and Cancel key” on the control panel at the same time until ”Start
SELF-TEST” displays. The panel displays will show “Display” to indicate that service
mode has started after the printer unit checks itself.
2) Using the Menu key on the control panel, select “READ MEMORY”.
3) Press the ENTER key to select “READ FROM DCON”.
4) Using the or key, select ‘YES’.
5) Press the ENTER key to execute.
6) See that “READ FROM DCON EXECUTING>” is indicated.
7) Turn off the printer unit power switch and disconnect the power plug.
8) Perform the steps under VIII.C.4 “Removing the DC Controller PCB” in Chapter 4 to
remove the DC controller PCB and mount the new DC controller PCB.
9) Put back the parts that have been removed. (However, it is better not to mount the
rear cover of the printer unit until after checking to see that copier operates normal-
ly.)
10)Connect the power plug to the power outlet; and enter the service mode once agein.
11)Using the Menu key on the control panel, select “WRITE MEMORY”.
12)Press the ENTER key to select “WRITE TO DCON”.
13)Using the or key, select ‘YES’.
14)Press the ENTER key to execute.
15)See that “WRITE TO DCON EXECUTING>” is indicated.
16)End.
Reference:
For details of “READ MEMORY” and “WRITE MEMROY,” see p. 10-88 and p. 10-92.
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CHAPTER 10 TROUBLESHOOTING
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CHAPTER 10 TROUBLESHOOTING
a. Using a Meter
1) SET the meter range to 30 VDC.
2) Connect the - probe of the meter to GND on the DC controller PCB.
3) Connect the + probe of the meter to the terminals (on the DC controller PCB) indi-
cated on the pages that follow.
4) Make checks as indicated. (See the tables on pp. 10-5 ff.)
S E N S O R M O N I T O R I N G
x x y y z z
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CHAPTER 10 TROUBLESHOOTING
Note:
1. The notation “zz” shown on the display (2nd row) is for use at the factory for checks
and is not relevant to servicing work.
2. Each sensor has its own response time, some requiring as much as about 5 sec.
Be sure to allow an adequate period of time before making a decision on each sen-
sor.
3. If multiple sensors are turned on at the same time, the result will be the sum of the
codes obtained for all sensors (in hexadecimal notation).
4. To execute sensor monitor mode, be sure to remove the intermediate transfer drum,
all cartridges, and secondary transfer belt assembly before starting service mode.
(Otherwise, you could inadvertently touch operating parts.)
Further, you need to remove the following parts for respective sensors in view of the
type of work to perform:
• For PS1903 and PS5, the fixing assembly.
• For PS11, the upper cover assembly.
• For PS1207, the cassette 1.
• For PS1208, the cassette 2.
P008 xxxxxxxx
Address
bit 0
bit 1
:
bit 7
Figure 10-102
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CHAPTER 10 TROUBLESHOOTING
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CHAPTER 10 TROUBLESHOOTING
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CHAPTER 10 TROUBLESHOOTING
No. PS1903
Name Fixing delivery sen-
sor
Meter probe (+) J207-12
Service Printer unit
mode panel
Reader DC-CON, P001 bit 3
unit panel
Checks (normal as While in standby,
described) the white lever over
the fixing delivery
sensor is
• pushed, ‘1’.
• not pushed, ‘0’.
Note that this sensor
is a photosensor.
*1: Open the right cover, and use the door switch actuator.
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CHAPTER 10 TROUBLESHOOTING
1. Site Environment
a. The voltage must be as rated (±10%).
b. The machine must not be in a high-temperature/-humidity environment (near water
faucet, water boiler, humidifier), or it must not be in a cold place. There must not be a
source of fire nearby, and the machine must not be subjected to excess dust.
c. The machine must not be subjected to ammonium gas.
d. The machine must not be exposed to direct sunshine. As necessary, curtains must be
provided.
e. The room must be well ventilated.
f. The machine must be kept level.
g. The power plug of the printer unit must be connected to the power outlet. However, if
the reader unit is installed, the power plug of the printer unit must be connected to the
reader unit and the power plug of the reader unit must be connected to the power out-
let.
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CHAPTER 10 TROUBLESHOOTING
7. Others
In winter, bringing a machine from a cold to warm place can cause condensation
inside it, leading to various problems.
a. Condensation in the original exposure system or the drum exposure system (6-facet
mirror, reflecting mirror, lens) can produce light images.
b. Condensation in the charging system can cause leakage.
c. Condensation on the pick-up/feeding guide can cause feeding faults.
d. When cold, the photo-conducting layer of the photosensitive drum inside the drum
cartridge tends to have a high resistance, causing poor contrast on prints.
e. Condensation on the surface of the intermediate transfer drum can cause ITD clean-
ing faults.
If condensation is found, dry wipe the parts, or leave the machine powered for 10 to
20 min. Opening a toner cartridge immediately after brining it in from a cold place will also
cause condensation. Instruct the user to make sure that the cartridges have become
used to the room temperature by leaving them alone (for 1 to 2 hr) before opening them.
Note:
If the reader unit is installed, it is important to find out whether the cause of the image
fault, if any, is in the reader unit or the printer unit.
• If the problem occurs when the CA-1 Chart is copied but does not occur on a test
print generated in service mode using the reader unit,
→ the cause is in the reader unit. (See the Reader Unit Service Manual.)
• If the problem occurs on the test print generated in service mode using the reader
unit.
→ the cause is in the printer unit. (See the pages that follow.)
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CHAPTER 10 TROUBLESHOOTING
The printer unit contains the test print patterns (horizontal lines) of four colors (yellow,
magenta, cyan, and black) shown in Figure 10-202. Generate test prints if a problem
occurs in the printer unit to find out its cause.
To generate a test print without a printer board, turn on the power while holding down
the Test Print switch. Then, press the switch when the printer unit has entered standby
state.
To generate a test print with the printer board installed, turn on the power, and press
the switch when the machine has entered standby state.
Do not turn on the power while holding down the switch if the printer board is installed.
The display panel will indicate “Service Call,” and the printer unit will enter an error state.
Be sure to turn on the power as normally done if the printer board is installed.
If the display panel indicates “Service call,” turn off and then on the power effort gen-
erating a test print.
When generating test prints, the machine uses the cassette 2. Make sure that the
cassette 2 contains paper before pressing the switch.
Figure 1-201
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CHAPTER 10 TROUBLESHOOTING
Output direction
Figure 10-202
Reference:
If the reader unit is installed, you may use its control panel to select
COPIER>TEST>PG>TYPE to generate test prints (16 types), i.e., thereby generating
common color copier test prints (16 type).
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CHAPTER 10 TROUBLESHOOTING
Table 10-201
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CHAPTER 10 TROUBLESHOOTING
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CHAPTER 10 TROUBLESHOOTING
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CHAPTER 10 TROUBLESHOOTING
Image Development
Problem part Diameter* interval* White Soiled Faulty
Soiling
(mm) (mm) spot back fixing
Cassette pick-up roller 24 75 ✓
Separation roller 24 75 ✓
Feeding roller 1 24 75 ✓
Feeding roller 2 38 119 ✓
Multifeeder pick-up roller 30 94 ✓
Registration roller 16 52 ✓ ✓
Primary charging roller 14 44 ✓
Photosensitive drum 62 195 ✓ ✓
Developing cylinder 21 66 ✓
Upper fixing roller 46 144 ✓ ✓
Lower fixing roller 46 144 ✓ ✓
ITD cleaning roller 18 57 ✓
*Approximate.
Table 10-202
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CHAPTER 10 TROUBLESHOOTING
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CHAPTER 10 TROUBLESHOOTING
Note:
See Table 10-202.
Note:
See Table 10-202.
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CHAPTER 10 TROUBLESHOOTING
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CHAPTER 10 TROUBLESHOOTING
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CHAPTER 10 TROUBLESHOOTING
Caution:
1. If you must measure the voltage using the indicated terminals of a connector, be
sure to check the connector for poor contact.
2. When handling PCBs, be sure to touch a metal area of the printer unit before start-
ing the work to discharge the build-up of static electricity, thereby preventing dam-
age to the PCBs.
3. When replacing the DC controller PCB, see p. 10-1.
4. The machine’s scanner/laser assembly and the intermediate transfer drum (ITD)
cannot be adjusted in the field. Do not try to disassemble it. (The secondary pre-
transfer charging assembly inside the intermediate transfer drum, however, may be
replaced on its own.)
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CHAPTER 10 TROUBLESHOOTING
A. Error Codes
No. Item Page No. Item Page
1 E000/E003 10-30 16 E196/E197/E198 10-39
2 E001 10-31 17 E240 10-39
3 E004 10-31 18 E677/E678/E679 10-40
4 E009 10-32 19 E805 10-40
5 E010/E011 10-32 20 E806 10-41
6 E013 10-32 21 E807 10-42
7 E019 10-33 22 E808 10-42
8 E020 10-33 23 E810 10-43
9 E021 10-34 24 E812 10-43
10 E040 10-35 25 E813 10-43
11 E054 10-36 26 E814 10-44
12 E055 10-37 27 E545/E546 10-44
13 E066 10-38 28 E903 10-44
14 E100 10-38 29 Service Call Check Reader 10-44
15 E110 10-39 30 Others 10-44
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CHAPTER 10 TROUBLESHOOTING
1 E000/E003
Caution:
If E001 or E003 is indicated, be sure to discharge the error memory capacitor (C259)
on the DC controller PCB after troubleshooting the problem, as it may contain error
memory. (Short JP201 on the DC controller PCB to discharge C259.)
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CHAPTER 10 TROUBLESHOOTING
2 E001
Caution:
If E001 or E003 is indicated, be sure to discharge the error memory capacitor (C259)
on the DC controller PCB after troubleshooting the problem, as it may contain error
memory. (Short JP201 on the DC controller PCB to discharge C259.)
3 E004
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CHAPTER 10 TROUBLESHOOTING
4 E009
5 E010/E011
6 E013
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CHAPTER 10 TROUBLESHOOTING
7 E019
8 E020
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CHAPTER 10 TROUBLESHOOTING
9 E021
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CHAPTER 10 TROUBLESHOOTING
10 E040
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CHAPTER 10 TROUBLESHOOTING
11 E054
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CHAPTER 10 TROUBLESHOOTING
12 E055
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CHAPTER 10 TROUBLESHOOTING
13 E066
14 E100
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CHAPTER 10 TROUBLESHOOTING
15 E110
16 E196/E197/E198
17 E240
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CHAPTER 10 TROUBLESHOOTING
18 E677/E678/E679
19 E805
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CHAPTER 10 TROUBLESHOOTING
20 E806
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CHAPTER 10 TROUBLESHOOTING
21 E807
22 E808
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CHAPTER 10 TROUBLESHOOTING
23 E810
24 E812
25 E813
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CHAPTER 10 TROUBLESHOOTING
26 E814
27 E545/E546
28 E903
30 Others
Turn off and then on the printer unit. If the problem is not corrected, replace the print-
er board. (For details, see the Service Manual for the PS/PCL Board.)
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CHAPTER 10 TROUBLESHOOTING
Note:
1: Be sure to wait 60 sec after the circuit breaker has turned on before turning it back
on. Be sure to turn on the power switch and check the AC line for a short circuit and
the condition of the circuit breaker (continuity, and contact resistance) with a meter
before connecting the printer unit power plug to the power outlet.
2: The printer unit power switch (SW1) is blocked by a face cover after turning on the
printer unit at time of installing the reader unit. Do not touch unless this step must
be performed. Be sure to turn it on, and attach the face cover after the work.
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CHAPTER 10 TROUBLESHOOTING
Note:
The printer unit power switch (SW1) is blocked by a face cover after turning on the
printer unit at time of installing the reader unit. Do not touch unless this step must be
performed. Be sure to turn it on, and attach the face cover after the work.
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CHAPTER 10 TROUBLESHOOTING
3 +24 UH is absent.
Note:
The printer unit power switch (SW1) is blocked by a face cover after turning on the
printer unit at time of installing the reader unit. Do not detach the cover unless this step
must be performed. Be sure to turn it on, and attach the face cover after the work.
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CHAPTER 10 TROUBLESHOOTING
Note:
The printer unit power switch (SW1) is blocked by a face cover after turning on the
printer unit at time of installing the reader unit. Do not detach the cover unless this step
must be performed. Be sure to turn it on, and attach the face cover after the work.
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CHAPTER 10 TROUBLESHOOTING
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CHAPTER 10 TROUBLESHOOTING
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CHAPTER 10 TROUBLESHOOTING
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CHAPTER 10 TROUBLESHOOTING
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CHAPTER 10 TROUBLESHOOTING
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CHAPTER 10 TROUBLESHOOTING
A. Paper Jams
Inside the printer unit, jams tend to be limited to the following locations:
Figure 10-401
Reference:
If the reader unit is installed, you can check the location and the type of any jam (last
50) in the copier in service mode (Display>JAM) on its control panel.
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CHAPTER 10 TROUBLESHOOTING
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CHAPTER 10 TROUBLESHOOTING
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CHAPTER 10 TROUBLESHOOTING
3 Transfer/Fixing Assembly
A. After executing test printing in service mode, a jam occurs without the leading edge
of print paper reaching the secondary transfer belt assembly.
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CHAPTER 10 TROUBLESHOOTING
B. After executing test print in service mode, the leading edge of print paper reaches the
secondary transfer belt assembly. Or, the print paper is wrapping around the inter-
mediate transfer drum.
Caution:
If the cause of the jam is the drum motor, the intermediate transfer drum can lock dur-
ing initial rotation and trigger abnormal noise.
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CHAPTER 10 TROUBLESHOOTING
C. After executing test printing in service mode, the leading edge of print paper jams at
a location after the secondary transfer belt.
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CHAPTER 10 TROUBLESHOOTING
4 Delivery Assembly
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CHAPTER 10 TROUBLESHOOTING
5 Duplexing Unit
Sensor lever 5 Is any sensor lever damaged or YES Position the sensor
deformed? lever correctly so that it
moves smoothly. If
damaged or deformed,
replace it.
NO Replace the duplexing
unit.
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CHAPTER 10 TROUBLESHOOTING
B. Faulty Feeding
1 Double Feeding
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CHAPTER 10 TROUBLESHOOTING
2 Wrinkles/Bending (leading
3 Skew
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CHAPTER 10 TROUBLESHOOTING
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CHAPTER 10 TROUBLESHOOTING
A. Sensors
PS11 PS10
PS30
PS3
PS1903
PS1901C
PS1902
PS5 PS1302
PS1802 PS1301
PS17 PS18
PS1
PS1801 PS1208 PS1206
PS1202
PS1205
PS19
PS29
PS1207
PS1201
PS1204
PS1203
Figure 10-501
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CHAPTER 10 TROUBLESHOOTING
Table 10-501
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CHAPTER 10 TROUBLESHOOTING
SW644
SW642 SW641
SW672 HU LED1
TPU HL
THU SW201
SW1601
SW671 SW1602
TPL THL SW1603 SW202
SW673
SW1604
SW1601
SW1602
SW1 SW1603
SW1604
Figure 10-502
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CHAPTER 10 TROUBLESHOOTING
Table 10-502
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CHAPTER 10 TROUBLESHOOTING
SL5
SL2
SL4
CL3
CL1
CL4
SL1
CL2
SL3
Figure 10-503
Table 10-503
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CHAPTER 10 TROUBLESHOOTING
FM2
M6
M1
FM1 M3
M2
FM3
M4
M5
Figure 10-504
Table 10-504
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CHAPTER 10 TROUBLESHOOTING
E. PCBs
w y
@0
e
r i
q t
u
!7 !9
!6 !0
!3 #5
!5
!2 #9
!4
!1
!8
Figure 10-505
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CHAPTER 10 TROUBLESHOOTING
Table 10-505
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CHAPTER 10 TROUBLESHOOTING
F. Duplexing Unit
M8
SL7
SL6
PS26
M7 PS23
PS25
CL5
PS24 q
Figure 10-506
Table 10-506
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CHAPTER 10 TROUBLESHOOTING
Caution: Caution:
Do not touch the VRs and check pins 1. Some LEDs emit dim light even
not discussed herein. They are for the when they are off. It is a normal
factory only and require special tools condition, and must be kept in
and high accuracy. mind.
2. VRs that may be used in the
field …
A1 A32
B1 J2104 B32
C1 C32
B20 B1
J2111
A1 A20
A50 A1
J2101
B50 B1
Figure 10-507
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CHAPTER 10 TROUBLESHOOTING
2. DC Controller PCB
6 8 1
1 8
J218 J204
10 4
1 1
1 J231 J228
J219 6 8
SW201 1
1
6 JP201 7 J201 1
J225
A1 J229
B9 1
C259 C1 C32 6
J220 6 B1 B32
SW202 J230 J224
A1 A32
B1 B1
A9 1 J221 7 1 J222 6 1 J223 8 B32 J202 1
A32 A1
Figure 10-508
Caution:
If E001 or E003 occurs, the error data may have been stored in the error memory
capacitor (C259) on the DC controller PCB. Be sure to discharge the capacitor after
removing the cause of the problem. (Short J201 on the DC controller PCB to dis-
charge the capacitor.)
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CHAPTER 10 TROUBLESHOOTING
A11 B1
J647
A1 B11
SW641 SW642
SW No. Name
SW641 Right cover switch
SW642 Drum cartridge detecting switch
Figure 10-509
2 6
J675
J671
1
1 SW671
2
1 J674
SW673 1
J673
6
1
J676
4
SW No. Name
SW671 Delivery cover/front cover switch
SW672 Turret button switch
Figure 10-510
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CHAPTER 10 TROUBLESHOOTING
SW No. Name
SW1601
SW1602 Cassette detecting switch
(p. 5-6)
SW1603
SW1604
Figure 10-511
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CHAPTER 10 TROUBLESHOOTING
Table 10-601
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CHAPTER 10 TROUBLESHOOTING
Caution:
1. Do not disconnect the power cord while the printer is in service mode. (Be sure to
turn off the power first to end service mode; however, do not turn off the power
while test mode, read memory mode, or write memory mode is under way.)
2. When the power is turned on normally, various adjustment data in the EEPROM on
the DC controller PCB is mounted to the printer unit and the paper is turned on nor-
mally, the data stored on the printer board will be lost. If you are replacing the DC
controller PCB, be sure to write the various adjustment data in read memory mode
to the RAM on the printer board, and then write it to the EEPROM on the new DC
controller PCB in write memory mode.
RAM Writing
EEPROM
EEPROM
For back-up
Figure 10-601
RAM Writing
EEPROM
EEPROM
Figure 10-602
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CHAPTER 10 TROUBLESHOOTING
C. Main Menu
No. Main Menu
1 DISPLAY
2 SENSOR MONITOR
3 TEST
4 PAPER FEED
5 READ MEMORY
6 PARAMETER
7 BIAS
8 WRITE MEMORY
Table 10-602
• After entering the service mode, the following message is displayed on LCD “DISPLAY”.
• If the “MENU” key is pressed, the next item of main menu is displayed on LCD.
• If the “MENU” key is pressed while “MESSAGE/NAME” is displayed, “DISPLAY” is dis-
played again.
• If the “MENU” key is pressed, go to the sub menu of each main menu items. For details,
see the detail information of each main menu item.
• If the “CANCEL” key is pressed, exit service mode and reboot.
1. DISPLAY
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CHAPTER 10 TROUBLESHOOTING
2. SENSOR MONITOR
Sensor monitor mode is for displaying the state of the sensors in the paper path of
the printer unit.
Sub Menu Description Remarks
SENSOR Use it to monitor the state of the sensors used
MONITORING in the printer unit. Turn on the sensor manually;
the results of execution will be indicated on the
control panel.
For ‘xx yy zz’, see Table 10-603.
Table 10-603 shows the display position and the display reading of each sensor.
Sensor Display reading Display position
(hexadecimal)
Face-down tray delivery sensor (PS11) 10 xx
Fixing delivery sensor (PS1903) 08
Separation sensor (PS5) 04
Pick-up assembly sensor (PS17) 02
Registration paper sensor (PS1) 01
Lower cassette paper absent sensor 08 yy
(PS1207)
Upper cassette paper absent sensor 02
(PS1208)
Multifeeder tray paper sensor (PS1301) 01
Table 10-603
Caution:
1. The notation “zz” in the display panel (2nd row) is for checks at the factory, and is
not relevant for servicing work.
2. Each sensor has its own response time, some requiring as much as 5 sec. Be sure
to allow adequate time before making a decision.
3. If multiple sensors are turned on at once, the reading will be the sum of the results
in hexadecimal notation.
4. Execution sensor monitor mode can drive some major parts. To avoid contact and,
therefore, injuries, be sure to remove the intermediate transfer drum, various car-
tridges, and secondary transfer belt assembly before starting service mode.
In view of the work, remove the following for each respective sensor:
• For PS1903 and PS5, remove the fixing assembly.
• For PS11, remove the upper cover assembly.
• For PS1207, remove the cassette 1.
• For PS1208, remove the cassette 2.
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CHAPTER 10 TROUBLESHOOTING
3. TEST
Caution:
1. If you want to execute test mode while keeping the door covers open, use the door
switch actuators to keep the door switches on.
2. Do not put your hand or face inside when checking the operation of the engine
while the door cover is open.
3. Do not execute operation/inspection mode until the engine stops operation.
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CHAPTER 10 TROUBLESHOOTING
4. PAPER FEED
Use it to pick up one sheet of paper from the selected pick-up slot and deliver to the
selected delivery slot.
Caution:
1. If you want to execute test mode while keeping the door covers open, use the door
switch actuators to keep the door switches on.
2. Do not put your hand or face inside when checking the operation of the engine
while the door cover is open.
3. Do not execute operation/inspection mode until the engine stops operation.
5. READ MEMORY
This mode is stored in the EEPROM on the printer board, and is used to read various
backup data items (e.g., PARAMETER, BIAS) to the work area.
Printer board
RAM
Reading
EEPROM
Figure 10-603
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CHAPTER 10 TROUBLESHOOTING
6. PARAMETER
Parameter mode is for checking the adjustment data specific to each printer unit and
stored in the EEPROM on the DC controller PCB at time of shipment. Normally, it is the
data stored in the RAM on the printer board.
Changing each data item and executing memory write mode thereafter will update the
data in the EEPROM on the DC controller PCB.
Sub Menu Description Remarks
REG-V-Y Use it to fine-adjust the write start position (sub Unit: 1 pixel
scanning) on the intermediate transfer drum for A higher setting will shift
the Y pattern using M as reference. (1st page of the pastern toward the
1-page mode, and 1st and 2nd pages of 2-page rear.
mode).
Settings: -7 to +8
REG-V-C Use it to fine-adjust the write start position (sub
Standard: 0
scanning) on the intermediate transfer drum for
the C pattern using M as reference. (1st page of Enter setting, and exe-
1-page mode, and 1st and 2nd pages of 2-page cute ‘WRITE MEMORY’.
mode).
REG-V-K Use it to fine-adjust the write start position (sub
scanning) on the intermediate transfer drum for
the K pattern using M as reference. (1st page of
1-page mode, and 1st and 2nd pages of 2-page
mode).
REG2-V-Y Use it to fine-adjust the write start position (sub
scanning) on the intermediate transfer drum for
the Y pattern using M as reference. (2nd and
subsequent pages of 1-page mode, and 3rd
and subsequent pages of 2-page mode).
REG2-V-C Use it to fine-adjust the write start position (sub
scanning) on the intermediate transfer drum for
the Y pattern using C as reference. (2nd and
subsequent pages of 1-page mode, and 3rd
and subsequent pages of 2-page mode).
REG2-V-K Use it to fine-adjust the write start position (sub
scanning) on the intermediate transfer drum for
the Y pattern using K as reference. (2nd and
subsequent pages of 1-page mode, and 3rd
and subsequent pages of 2-page mode).
REG-V-M Use it to set the leading edge registration for M
to serve as a reference.(1st page of 1-page
mode, and 1st and 2nd pages of 2-page mode).
REG2-V-M Use it to set the leading edge registration for M
to serve as a reference.(2nd and subsequent
pages of 1-page mode, and 3rd and subse-
quent pages of 2-page mode).
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CHAPTER 10 TROUBLESHOOTING
Note:
1. The term “1st page” means the first image formed on the intermediate transfer
drum. In 2nd page mode, a 2nd page image is formed at the same time; as such,
the term “1st page” is used to mean the first and second images formed on the
drum.
2. The term “2nd page” means the second image formed on the intermediate transfer
drum. In 2nd page mode, however, two pages of images are formed at the same
time; as such, the term is used to mean the third and subsequent images formed
on the drum.
Reference:
Halftone
Halftone or solid
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CHAPTER 10 TROUBLESHOOTING
7. BIAS
Use this item when adjusting the level of the secondary transfer bias to suit various
environmental and printing conditions.
Sub Menu Description Remarks
TR-N1H For a H/H environment, use it to adjust the sec- Settings: 0 to +15
ondary transfer bias for single-sided printing or Standard: +8
first side printing of double-sided printing on
Enter setting, and exe-
plain paper.
cute ‘WRITE MEMORY’.
TR-N2M For a N/N environment, use it to adjust the sec-
Adjustment in the field is
ondary transfer bias for second side printing of
not usually needed.
double-sided printing on plain paper.
TR-N2H For a H/H environment, use it to adjust the sec-
ondary transfer bias for second side printing of
double-sided printing on plain paper.
TR-N2L For a L/L environment, use it to adjust the sec-
ondary transfer bias for second side printing of
double-sided printing on plain paper
TR-N2N/L For a N/L environment, use it to adjust the sec-
ondary transfer bias for second side printing of
double-sided printing on plain paper.
8. WRITE MEMORY
This memory is used to write the various adjustment data items (e.g., PARAMETER,
BIAS) read into the RAM on the printer board to the EEPROM on the printer board and
the EEPROM on the DC controller PCB.
RAM Writing
Writing EEPROM
EEPROM
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CHAPTER 10 TROUBLESHOOTING
Caution:
· If you have started the machine as you would normally, the above menu for service
test page would not be indicated.
· For displacement of registration, use the test page intended for the engine side
generated by pressing the DCON button. You may, however, use the test page
generated by selecting “PRINT SERVICE PAGE 5”.
B. Test Pattern
TYPE Remarks
1 PRINT SERVICE PAGE 1 Full-color 16 gradations (YMCK)
2 PRINT SERVICE PAGE 2 Gradation (YMCKRGB)
3 PRINT SERVICE PAGE 3 Full face halftone (Y, M, C, K)
4 PRINT SERVICE PAGE 4 YMCK vertical stripe
5 PRINT SERVICE PAGE 5 Controller Test Chart
Table 10-701
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CHAPTER 10 TROUBLESHOOTING
Note:
· The page consists of patches of Bk, Y, RGB, M, and C.
· Cassette 2 is used as the source of paper.
· The page consists of a single sheet.
· Regardless of the size of paper, the patches are printed at the center.
a. Gray Balance
Check to find out if the gray scale is even for all colors.
b. Gradation
Check the gradation and the difference in density of each color (YMCK).
c. Fogging
If the white area is foggy, the photosensitive drum inside the drum cartridge or the
laser system of the printer unit is likely to be faulty.
Figure 10-701
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CHAPTER 10 TROUBLESHOOTING
2. Gradation (YMCKRGB)
Use the gradation (YMCKRGB) test print to check the gradation of all colors (YMCK-
RGB) at a glance.
Note:
· The page consists of gradations of Bk, B, G, R, Y, M, and C.
· Cassette 2 is used as the source of paper.
· The page consists of a single sheet.
· Regardless of the size of paper, the patches are printed at the center.
Figure 10-702
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Figure 10-703
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CHAPTER 10 TROUBLESHOOTING
Figure 10-704
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CHAPTER 10 TROUBLESHOOTING
Note:
· Cassette 1 is used as the source of paper.
· The page consists of a single sheet.
· The page consists of a total 4 sheets.
· The chart contains various objects for checks.
Figure 10-705
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CHAPTER 10 TROUBLESHOOTING
A. Printer unit
Code Cause Description
• The fixing assembly warm-up is • When the time taken to reach the
faulty. standby temperature from 20°C after
E000 the fixing heater has been turned on
is longer than the reference time.
E001 • The fixing assembly has overheated. • The fixing temperature during stand-
by or printing exceeds about 230°C.
• The fixing temperature is abnormally • The fixing assembly temperature
E003 low. drops below 120°C after it has
reached the target value.
• The upper/lower fixing heater has an • A check is made for an open circuit
open circuit. at the start of temperature control.
E004 The AC current expected in the fix-
ing heater is absent.
• The fixing assembly type is wrong. • The rated voltage of the machine’s
E009 power supply and that of the fixing
assembly do not match.
E010 • The main motor start-up is faulty. • The revolution of the main motor
fails to reach a specific value.
E011 • The main motor rotation is faulty. • The revolution of the main motor
deviates from a specific value.
• The waste toner case is full. • A specific number of prints have
been made after the waste toner
E013 case full warning has been issued
(DISPLAY>SENSOR>W-TONER).
• The waste toner detection assembly • At time of power-on or while the
operation is faulty. drum motor is rotating during print-
E019 ing operation, the light-receiving cell
of the waste toner sensor does not
detect light for a specific time even
when the waste toner case is not
full.
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CHAPTER 10 TROUBLESHOOTING
Note:
For troubleshooting faults related to the printer unit, see III. "Troubleshooting
Malfunctions" in Chapter 10; however, for disassembly/assembly, see the Reader
Unit Service Manual.
*1: See the Copy Data Controller Service Manual.
*2: See the Feeder Service Manual.
*3: See the ACC Controller Service Manual.
*4: See the 7-Bin Sorter Service Manual.
*5: See the Paper Deck Service Manual.
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CHAPTER 10 TROUBLESHOOTING
Note:
1. The EEPROM on the DC controller PCB contains various data (e.g., registration
adjustment values) of each machine model. If you are replacing the DC controller
PCB, be sure to transfer the data to the new DC controller PCB as instructed under
I.A.1. “Replacing the DC Controller PCB” in Chapter 10.
2. Upon detection of E000, E001, E003, E004, E009, or E808, the printer unit issues
a service person call and then turns itself off in 20 sec.
3. In the case of a fault associated with E001 or E003, the data may be stored in the
error memory capacitor (C259) on the DC controller PCB. After removing the
cause, be sure to discharge the capacitor. (Short JP201 on the DC controller PCB
to discharge C259; see p. 10-80.)
4. The machine’s laser/scanner assembly and intermediate transfer drum unit are not
designed for adjustment in the field. Do not disassemble them. (However, the sec-
ondary pre-transfer charging assembly inside the intermediate transfer drum may
be replaced.)
5. The control panel of the printer unit indicates error codes associated with the print-
er unit; if the reader unit is installed, error codes related to the reader unit will be
dealt with by indicating “SERVICE CALL CHECK READER.
• The control panel of the reader unit indicates error codes associated with the
reader unit. Check the code, if any, and work according to the instructions in the
Reader Unit Service Manual.
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APPENDIX
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A. GENERAL TIMING CHART
0.5 10 (approx.)
2 Scanner motor
8 Pre-exposure LED
CWW CW 2.6
17 Primary charging bias (AC)
2.8
18 Primary charging bias (DC)
9.6 9.4
19 Black developing bias (AC)
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Timing Chart during WAIT (2/2)
Power ON M-CPU ON command (unit: sec)
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Timing Chart 1 during PRINT (1/2)
A3,
Full-color,
1 Page,
Plain Paper
PRINT* signal Print sequence command (unit: sec)
10.0 min.
2 Scanner motor
3.6
12 Registration clutch (CL1)
0.2
14 Cassette pick-up solenoid (SL3)
2.4
16 Drum motor (M2)
1.3 0.3 4.7 4.7 4.7 3.5
17 Developing rotary motor (M1)
0.7 2.0 1.6 4.1 4.1 4.1 3.5 0.4 1.1 1.5
18 Cartridge motor (M3)
1.4
20 Primary charging bias (DC)
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Timing Chart 1 during PRINT (2/2)
A3,
Full-color,
1 Page,
Plain Paper
PRINT* signal Print sequence command (unit: sec)
1.7 14.0
24 Color developing bias (DC)
0.8 2.5
25 Primary transfer (DC) bias (positive)
0.5 1.1
26 Primary transfer (DC) bias (negative)
1.6 2.8
27 Secondary pre-transfer bias (AC)
1.6 2.8
28 Secondary pre-transfer bias (DC)
0.2 6.1
29 Secondary transfer belt clutch (CL4)
0.5 3.7
30 Secondary transfer (DC) bias (positive)
2.1
31 Secondary transfer (DC) bias (negative)
1.0
35 ITD cleaning (DC) bias (negative)
3.4 4.4 1.2 3.8 1.2
36 Separation static eliminating (AC) bias
2.4
38 Fixing separation (DC) bias
A-4 COPYRIGHT © 1999 CANON INC. CANON 660/2100 REV.0 FEB. 1999 PRINTED IN JAPAN (IMPRIME AU JAPON)
Timing Chart 2 during PRINT (1/2)
A4, Horizontal,
Full-color,
2 Pages,
Plain Paper
PRINT* signal Print sequence command (unit: sec)
3.1
9 Heat discharge fan (FM3)
3.1
10 Pre-exposure LED
1.8 1.8
12 Resignation clutch (CL1)
0.2 0.2
14 Cassette pick-up solenoid (SL3)
2.4
16 Drum motor (M2)
0.3
1.3 4.7 4.7 4.7 3.5
17 Developing rotary motor (M1)
0.7 2.0 1.6 4.5 4.5 4.5 3.5 0.9 0.6 1.5
18 Cartridge motor (M3)
1.4
20 Primary charging bias (DC)
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Timing Chart 2 during PRINT (2/2)
A4, Horizontal,
Full-color,
2 Pages,
Plain Paper
PRINT* signal Print sequence command
(unit: sec)
Sequence STBY INTR PRNT LSTR STBY
14.5
24 Color developing bias (DC)
0.8 2.5
25 Primary transfer (DC) bias (positive)
0.5 1.1
26 Primary transfer (DC) bias (negative)
2.0 2.8
27 Secondary pre-transfer bias (AC)
2.0 2.8
28 Secondary pre-transfer bias (DC)
0.2 6.1
29 Secondary transfer belt clutch (CL4)
1.8
31 Secondary transfer (DC) bias (negative)
2.5
38 Fixing separation (DC) bias
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APPENDIX
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APPENDIX
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APPENDIX
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APPENDIX
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APPENDIX
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APPENDIX
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APPENDIX
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APPENDIX
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C. GENERAL CIRCUIT DIAGRAM
PRINTER UNIT (1/2)
FAN3ON
fan 1 J672 J642 J683-1
FM1 J702 J704 Black toner -2 Pre-exposure
1
GND
P S 3 N.C
GND 1 1 24VAR cartridge detecting LED assembly
FAN1LK* 2 2 24VAR 3
3 CCRGLED Toner cartridge 2 PYMC 2
FAN1ON 3 3 RMPHA PS1901C 2 GND cover switch 1 PBK 3 switch J18M J18F J74M J74F
Developing 2 FM3
N.C 4 4 RMPHA* M1 1 CCRGSNS 4 1 PMP 3 1 GND 3 1 J681-4 J682-1
1 SW672
rotary motor 2 PBK 2 2 FAN3LK* 2 2 -3 -2
5 RMPHB Color J1901C Pre-exposure
Heat discharge 6 RMPHB* J675 3 N.C 1 3 FAN3ON 1 3 -2 -3
cartridge sensor J671 LED relay
fan 2 1 Delivery cover/front N.C -1
2 PMP Heat discharge
1
2
1
2
3
FM2 J703 Face-down tray Face-down tray Left cover 2 SW644 PCB
GND 1 cover switch 1 PFUFR J644 J645 fan 3
full sensor delivery sensor sensor 3
FAN2LK* 2 PS10 PS11 PS30 P5 SAVE 4 SW671
J641 J102
FAN2ON 3 RLOCKS 5 6 CCRGLED 1 Right cover Drum cartridge 6 GND 1 Power
GND 6 5 CCRGSNS 2 switch detecting switch
3 2 1 5 GND 2 switch
4 EXSW* 3 SW641 SW642
J1902 Turret button 3 GND 4 Main relay PCB 4 GND 3 SW1
J11 J10 J9 Cartridge 3 +24VB 4
J220 J706 switch 2 CLNRON 5
3
2 +24VB 5
2
1
2
1
2
1
P SS releasing SW673 1 +24UH 6
lever sensor 1 +24VB 6
A1 FAN1LK* A9
1
2
3
4
5
6
1
2
3
B9 FAN1ON* B1 PS1902 J674 J673 J643
A2 FAN2LK* A8 J12F J8F CLNRON 1
SL1
B8 FAN2ON* B2 +24UH 2
J647
A3 FDFULL A7 Sub relay PCB J103
B7 P5SAVE B3 J12M J8M ITD cleaning GND 1
3
2
1
1
2
3
4
5
A10
B10
A11
roller solenoid
B11
2
6
5
4
3
2
1
A4 FMCOPN* A6 GND
A9
A8
A7
A6
A5
A4
A3
A2
A1
B1
B2
B3
B4
B5
B6
B7
B8
B9
J676 3
B6 FDOUT* B4 GND
3 1
4
CCRGSNS
A5 GND A5 +5VS
CCRGLED
F AN3ON*
FMCOPN*
2 2
F AN3LK*
SL5
CLNRON
P5SAVE
B5 B5 5
STPROT
RLSROT
GND +5V
FDOUT*
P5SAVE
P5SAVE
P5SAVE
FDFULL
EXSW*
1 3
DSW1
DSW4
DSW2
DSW5
DSW3
24VAR
A6 RLSROT A4 +5V 6
24UH
24UH
24UH
24UH
24UH
GND
GND
GND
GND
GND
GND
GND
GND
B4 STPROT B6 +5V 7
A7 DEVICH1 A3 J23M J23F To J207 (p. 2/2) N.C 8
B10
A10
B11
A11
Developing rotary
10
12
11
B3 DEVICH2 B7
B9
B8
B7
B6
B5
B4
B3
B2
B1
A1
A2
A3
A4
A5
A6
A7
A8
A9
1
2
3
4
5
6
7
8
9
A8 DEVPHB A2 J705 stopper solenoid
B2 DEVPHB* B8 J648
Power supply
7
6
5
4
3
2
1
A9 DEVPHA A1 5 24VAR 1 J227 J201
1
B1 DEVPHA* B9 4 24VAR 2
2 J217 J106
3 GND 3
3
2 GND 4 6 GND 1
Developing rotary motor PCB 4
1 +24VB 5 5 PCONT 2
5
4 POFF 3
J701 J5002 J646 3 ACTYP 4
4 +24UH 1 2 N.C 5
J55M J55F J801 To secondary pre-transfer charging assembly 3 +24UH 2
1
1 N.C 6
2
4 1 4 2 GND 3
3 2 3 Temperature/ T5016 1 GND 4
3
J107
humidity 1 4 J222 J216
2 3 2 FXTHU 1
J206
1
2
3
4
5
6
7
8
9
10
11
12
6
5
4
3
2
1
TMPSNS
1 4 1 sensor 2 High- FXTHL 2
1 To fixing 6
GND
FXTYP
GND
FXTHL
GND
FXTHU
Cassette 1 GND 3
2 GND 5 voltage
assembly J5001 last paper sensor FXRON 4
3 HUMSNS 3 J226
4 +5V J46M J46F J75M J75F J1101 4
PCB 1 PS29 FXENB 5
A12 BTNSNS A1 FXUON 6
5 +24UH 6 1 6 1 6
B1 FBK B12 FXUONS 7
6 GND 5 2 5 2 5 Density To intermediate A11 BDEVAC A2 FXLON 8
7 DNS 4 3 4 3 4
detection B2 FCOLOR B11 FXLONS 9
HVFIXR
3
9
2
1
N.C
J63
1
2
3
B4 50KHzA B9 J63F
1
A8 CDEVDC A5
To ITD J5006
B5 25KHz B8
cleaning roller A7 +21.5V A6 J63M
1 4 J5007
B6 CDEVPWM B7
N.C
N.C
3
2
1
1 J101
1 A6 GND A7 J215
1
2
3
4
5
6
2 5 6 7
5 2 B7 BDEVPWM B6 1 GND
3
N.C
N.C
3 A5 SLVICH A8 2 P5SAVE To high
1
2
3
4
1
2
3
4
3 J5008 B8 50KHzB B5 3 UCEDFS -voltage PCB 2
2 HVFIX
6
4 HTUC
3 HTUH
A4 SLVPHA* A9 J30
2 5 5 B9 SLVPHB* B4 To high-voltage PCB 2
J26FB J26FA N.C
A3 SLVPHA A10
B1
B2
B3
B4
A1
A2
A3
A4
B1
B2
B3
B4
A1
A2
A3
A4
1 3 4 2 J224
4
3
2
1
J225 J73M J73F J2101 B10 SLVPHB B3
T5011 1 +24UH J27F J26F
1 8 1 8 A2 CHGAC A11
GND 2 +24UH
2 7 2 7 B11 CHGPWM B2 J27M J26M
FP5* 3 DRMPHA*
3 6 3 6 A1 CHGDC A12 Drum To lower
B4
B3
B2
B1
A4
A3
A2
A1
4
3
2
1
B4
B3
B2
B1
A4
A3
A2
A1
4
3
2
1
FP4* T5009 4 DRMPHA* M2
4 5 4 5 Display J60 B12 FCHG B1 motor
FP3* 5 DRMPHB roller
5 4 5 4
High-voltage PCB 2 To upper roller
FP2*
6 3 6 3
panel 6 DRMPHB*
J122 J26MA J129
FP1* J5003 J130
7 2 7 2
1
2
2 3
1 4
FP0* 1 +24UH J208 THU
8 1 8 1
+5R J61 2 SLVPHA PS19 1 2
3 SLVPHA* Cartridge
1 P5SAVE 3 1 3
2 1 J121M Fixing
To M3 2 GND 2 2 2 Multifeeder
4 SLVPHB motor 3 MPDFS* 1 3 1
J121F assembly
J5005 secondary 5 SLVPHB* tray last paper J120F J120M
1
2
transfer 4 GND sensor
5 MPTWID J32M J32F J34 TPU TH TPL HL
20 belt 6 P5SAVE 1 3 J126 J124
4 3
7 N.C 3 2 2 PS1701 J127 J123
J203 2 HU
2 3 1 Multifeeder J128 J125
1
DC controller PCB 1 4
N.C tray paper
J1701 width sensor
J33M J33F
A-15
COPYRIGHT © 1999 CANON INC. CANON 660/2100 REV.0 FEB. 1999 PRINTED IN JAPAN (IMPRIME AU JAPON)
Download free service manual at http://printer1.blogspot.com
PRINTER UNIT (2/2)
P S Light-receiving P S Laser
J5604 Face-up Developing rotary unit scanner motor BD PCB
To separation 1 PS1901B PS621
static eliminator opened position sensor (M6)
6 2 Fixing Color toner
5 delivery sensor level sensor
PS3 J631
3
2
1
1
2
3
1
2
3
4
1
2
3
4
5
4
3
2
1
4 J621 J901 J2
3
SL2
J1901B J631 J621 J901 J2
5
4
3
2
1
1
2
3
4
1
2
3
4
1
2
3
3
2
1
J43
1 WTLED
Laser driver PCB
2 GND
5
4
3
2
1
3
2
1
J5602
7
6
5
4
3
2
1
4
3
2
1
3
2
1
1
2
3
1
2
3
1
2
J5601 J633
J41F J42F J45F J71F J70F J40F
1
2
3
4
5
6
7
8
9
Separation J633 J1001
2
1
J676
1 static eliminating J41M J42M J45M Light-emitting J71M J70M J40M
high-voltage unit
10
1
2
3
4
5
6
7
1
2
3
4
1
2
3
3
2
1
3
2
1
2
1
1
2
3
4
5
6
7
8
9
4
3
2
1
PB
detection block
BSAMPLE*
BSAMPLE
DUPCMD*
Reserved
WTNLED
WTNFUL
CTNSNS
CTNLED
DUPSTS*
RLOCKS
DUPIDS*
SCMFG
FXOUTS
DUPCLK
BDA TA*
TSEL4*
TSEL3*
TSEL2*
TSEL1*
P5SAVE
P5SAVE
P5SAVE
FUSLD*
DEVHP
SCND
BDATA
IOTR*
+24UH
IOTT*
LENB*
+24UH
+24UH
6 50kHzB
5 DISDC
4 DISAC
3 +21.5V
2 GND
1 +24UH
GND
GND
GND
GND
GND
GND
GND
GND
+5V
+5V
BD*
+5V
GND
GND
GND
GND
GND
+5V
N.C
PD
10
12
11
10
7
6
5
4
3
2
1
7
6
5
4
3
2
1
1
2
3
4
5
6
7
8
1
2
3
4
5
6
7
8
9
1
2
3
4
5
6
7
8
J223
9
8
7
6
5
4
3
2
1
J204 J228 J229 J207 J221 J211 J205
DC controller PCB
J202
1
2
3
4
5
6
7
8
9
10
1
2
3
4
5
6
7
8
9
10
11
12
13
1
2
3
4
5
6
7
8
1
2
3
4
5
6
1
2
3
4
5
6
1
2
3
4
5
6
7
8
1
2
3
4
5
6
7
8
9
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
STRCLD*
REGCLD*
SEPS*
REGS*
OHPSNS1*
OHPSNS2*
MPTCLD*
MPTSLD*
MPTLS*
MPTPS*
MRDY*
MON*
+24UH
+24UH
P5SAVE
GND
P5SAVE
GND
N.C
N.C
N.C
P5SAVE
GND
P5SAVE
GND
GND
+24UH
+5V
N.C
N.C
MSPED1
MSPED2
GND
+24UH
8
7
6
5
4
3
2
1
FEDPHA*
FEDPHB*
UDECKS*
UDECKC*
FEDCLD*
FFEDS*
PUPSLD*
LDECKC*
LDECKS*
LPVS2*
LPVS1*
UPVS2*
UPVS1*
RDOORS*
J1
FEDPHA
FEDPHB
+24UH
P5SAVE
GND
GND
Printer board
(PS/PCL)
ECO2 PCB
6
5
4
3
2
1
J1
OPCSNS
20
19
18
17
16
15
14
13
12
10
11
USIZE4
USIZE3
USIZE2
USIZE1
9
8
7
6
5
4
3
2
1
LSIZE4
LSIZE3
LSIZE2
LSIZE1
MPWR
MDO1
MSC1
MSK1
MDI1
GND
GND
GND
N.C
N.C
J1201 M4
4
3
2
1
5
4
3
2
1
5
4
3
2
1
5
4
3
2
1
Pick-up PCB Main motor J1601A J1601B
J47M J48M
A4
A3
A2
A1
B5
B4
B3
B2
B1
5
4
3
2
1
5
4
3
2
1
1
2
3
4
5
6
7
8
9
J1301
6
5
4
3
2
1
2
1
2
1
3
2
1
3
2
1
PS1201 PS1203 PS1204 PS1207
J36M J37M J38M J15M J17M Cassette 2 Cassette 1
Cassette 2 Cassette 2 paper Cassette 2 paper Cassette 2 paper Multifeeder tray PCB
4
3
2
1
8
7
6
5
sensor level sensor 2 level sensor 1 sensor size detecting size detecting
J38F J15F J17F switch switch
1
2
3
4
5
6
1
2
3
1
2
3
1
2
1
2
4
3
2
1
8
7
6
5
Cassette Cassette
PS1202 PS1205 PS1206 PS1208 PS1302 PS1301 size detection size detection
Memory PCB
Cassette 1 Cassette 1 paper Cassette 1 paper Cassette 1 paper Holding pale Multifeeder PCB PCB
(photosensitive drum)
3
2
1
3
2
1
3
2
1
3
2
1
sensor level sensor 2 level sensor 1 sensor position sensor paper sensor J1801 J1802
J49 J16
CL4 CL1
1
2
3
PS5 PS1 P S P S
FEDCLD* 1
+24UH 2
PUPSLD* 1
+24UH 2
MPTSLD* 1
+24UH 2
MPTCLD* 1
+24UH 2
1
2
3
4
+5V
GND
1 RDOORS
FEDAD
FEDAND
FEDBD
FEDBND
+5V
GND
FEEDS
3
2
J13 J14
PS17 PS18
Pick-up motor Pick-up Pick-up Feeding Cassette Holding Multifeeder
assembly unit cover clutch pick-up plate paper
paper sensor sensor solenoid solenoid pick-up clutch
A-16 COPYRIGHT © 1999 CANON INC. CANON CP660/2100 REV.0 JAN. 1999 PRINTED IN JAPAN (IMPRIME AU JAPON)
APPENDIX
D. SPECIAL TOOLS
You will need the following special tools in addition to the standard tools set:
*Rank.
A. Each service person is expected to carry on.
B: Each group of about five service persons is expected to carry one.
C: Each workshop is expected to carry one.
COPYRIGHT © 1999 CANON INC. CANON 660/2100 REV.0 FEB. 1999 PRINTED IN JAPAN (IMPRIME AU JAPON) A-17
Download free service manual at http://printer1.blogspot.com
APPENDIX
Note:
Be sure to clean the external covers with a moist (however, well wrung) cloth.
A-18 COPYRIGHT © 1999 CANON INC. CANON 660/2100 REV.0 FEB. 1999 PRINTED IN JAPAN (IMPRIME AU JAPON)
Download free service manual at http://printer1.blogspot.com
Prepared by
Office Imaging Products Technical Support Department 3
Office Imaging Products Quality Assurance Center
CANON INC
Printed in Japan