EPSON WF-C20590 Service Manual - Page701-750

EPSON WF-C20590 Revision A
Pressure Pump Unit Pressure Pump Unit
Rear Rear
Pressure Pump Unit
Connector
Tube of Maintenance Unit

Hook
Dowel
No. Screw Type Air Tube
Air Tube
Connector S2 C.B.S-TITE R, SCREW, 3X8, F/ZN-3C
5. Remove the cable from the connector (x2). Surely connect the Air Tube.
6. Remove the four screws with stopper (S2: ), then remove the Pressure Pump Unit.
 When installing the Pressure Pump Unit, hook the hook (x2) on the frame on the
hole (x2) of the Pressure Pump Unit and fit the Dowel to the Positioning Hole.
 When installing the Pressure Pump Unit, take care not to damage the tube of the
Maintenance Unit.
Repair work Repair work 701

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Maintenance Unit
Maintenance Unit
D5 Rear
Rear Air Tube

Connector Connector
Connector
Maintenance Unit
Gray tube
Wiper Joint Tube

Tube clips
Maintenance Needle Assy

Maintenance Unit
Gray tube is connected to the ink collection pack to prevent ink from leaking to 2. Remove the Air Tube.
outside the printer. Make sure no ink collects on the ink tray in the unit. 3. Remove the cable from the connector (x3).
1. Disconnect the gray tube. When the Wiper Joint Tube is removed, the Ink may be discharged from the
connection point. Take care not to contaminate the periphery.
C H E C K The Tube Clips used in the next step are equipped to the container inside of the Front
P O IN T
Cover.
4. Hold the Ink Tube connected to the Wiper Joint Tube by the Tube Clip.

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Maintenance Unit Maintenance Unit
Wiper Joint Tube Rear left
Ink tube
Tube clip
Maintenance Needle Assy
Ink Supply Hole Cap Wiper Joint Tube Joint Cap Maintenance Needle Assy
Hook
Hook
No. Screw Type No. Screw Type

S13 C.B.SCREW, 3X12, F/ZN-3C S1 C.B.S-TITE R, SCREW, 3X8, F/ZN-3C
5. Remove the two screws (S13: ) fixing the Wiper Joint Tube. 7. Pinch the ink tube connected to the Maintenance Needle Assy with a tube clip.
C H E C K The Ink Supply Hole Cap used in the next step is contained to the Relay Ink Path Assy 8. Remove the two screws (S1: ) fixing the Maintenance Needle Assy.
P O IN T
supplied as ASF. C H E C K The Joint Cap used in the next step is contained to the Maintenance Unit supplied as
P O IN T
ASF.
6. Remove the Wiper Joint Tube, attach the Ink Supply Hole Cap to the connection point of
the edge, and then fix it with the hook (x4). The Joint Cap does not seal up the tip of the Maintenance Needle Assy. Therefore, ink
may flow out if you tilt the Maintenance Needle Assy.
9. Remove the Maintenance Needle Assy, attach the Joint Cap to the connection point of the
edge, and then fix it with the hook (x2).

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Maintenance Unit Maintenance Unit
Ink Supply Hole Cap Rear
Connection part with the

Cap Motion Unit
Maintenance Unit
No. Screw Type
Air Tube
S1 C.B.S-TITE R, SCREW, 3X8, F/ZN-3C
C H E C K Remove the Maintenance Unit in the next step, attach the Ink Supply Hole Cap to the Surely connect the Air Tube.
P O IN T
connection part with the Cap Motion Unit, and fix it with the hook.
10. Remove the three screws (S1: ), then remove the Maintenance Unit.
Tighten the screws in numerical order shown above.

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Cap Unit
Cap Unit
E6
Cap Rise/Fall Motor joint
OK: removing position NG: Head capping position
Cap Unit
Elevation Arm
No. Screw Type

S25 C.B.S-TITE, SCREW, 3X6, F/ZN-3C
S26 C.P SCREW, 3X35, F/ZN-3C (with washer)
1. Rotate the Cap Rise/Fall Motor joint and move the Cap Unit up to the removing position. 2. Remove the four screws: two (S25: ) and two (S26: ).
Make sure to remove the Cap Unit in the removing position. If you remove the Cap
Unit in the Head Cap position shown above, the Elevation Arm may get damaged.

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Cap Unit
Cap Rise/ Fall Motor

F6
Do not touch
Left
Cap Unit
Cap Rise/ Fall Motor
Connector
No. Screw Type

3. Remove the Cap Unit in the arrow direction while paying attention to the ink tube. 1. Disconnect the connector (x1).
Do not touch the Cap surface indicated in the red frame. 2. Remove the two screws (S25: ) and remove the Cap Rise/Fall Motor in the arrow
direction.

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7.3.3.13 Ink System 2/3
OUTLINE
Time
Part or Component Guide Disassembly/ Adjustment/
Total
Reassembly Inspection
Wiper Stroke Motor
A 6 min 45 sec 1 min 50 sec 8 min 35 sec
Assy
PF Belt B 10 min 40 sec --- 10 min 40 sec
Wiper Valve Assy C 15 min 20 sec --- 15 min 20 sec
Belt Drive Shaft Assy D 21 min 35 sec --- 21 min 35 sec
Wiper Cleaner Motor

E 24 min 50 sec 55 sec 25 min 45 sec
Assy
Wiper Assy F 28 min 2 min 55 sec 30 min 55 sec

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DISASSEMBLY FLOWCHART
Start
A1 B1 C1 Housing Rear, Right

D1 E1 F1 (→P. 709)
A2 B2 C2 Housing Rear, Left

D2 E2 F2 (→P. 709)
A3 B3 C3 Open the Board Box

D3 E3 F3 (→P. 710)
B4 C4 Frame Stay A4 Wiper Stroke Motor Assy

D4 E4 F4 (→P. 712) (→P. 711)
B5 EJ Drive Frame C5 Wiper Valve Assy E5 F5 Wiper Cleaner

Motor Assy
D5 (→P. 712) (→P. 714) (→P. 715)
B6 PF Belt F6 Wiper Valve Assy

(→P. 713) (→P. 716)
D6
D7 Belt Drive Shaft Assy F7 Wiper Assy ?

(→P. 715) (→P. 717)
C H E C K Parts with a star need operation or adjustment/indication

P O IN T before or after repair work. See "7.2.3 Adjustments
Required before/after Repair" (p.452) and carry out the
necessary operations.

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A1 B1 C1 A2 B2 C2
Housing Rear, Right Housing Rear, Left
D1 E1 F1 D2 E2 F2
Rear Right Rear Left
Hook
Rear Right Housing

Rear Left Housing
Dowel
Hook
Dowel Hook Rib
S7 C.B.S-TITE(P4), SCREW, 3X10, F/ZN-3C S7 C.B.S-TITE(P4), SCREW, 3X10, F/ZN-3C
1. Remove the six screws (S7: ). 1. Remove the three screws (S7: ).
2. Slide the Rear Right Housing in the direction of the arrow, then disengage the three hooks. 2. Slide the Rear Left Housing in the direction of the arrow to disengage the two hooks, and
3. Remove the Rear Right Housing while remove the two dowels. remove the Rear Left Housing.
When installing the Rear Left Housing, fix it with the hooks after fitting the three ribs
to the hole on the frame, then tighten the screws.

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Open the Board BOX

A3 B3 C3
Open the Board Box
D3 E3 F3 Right side Board BOX Fixing Wire
Rear
Board BOX
Hook
Rib
Hook
Board BOX
No. Screw Type

1. Remove the three screws (S1: ). 3. To fix the Board Box while it is in the open state, remove the Board Box fixed wire from
2. Lift up the Board BOX a little, disengage the two hooks, and open the Board BOX. the Rib of the Board Box and hook it onto the hook on the printer side.
Do not attempt to close the Board Box while the Board Box Fixed Wire is hooked
onto the hook on the printer side because the Board Box Fixed Wire will be bent and
the Board Box will become unable to be fixed.

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Wiper Stroke Motor Assy

A4
Wiper Stroke Motor Assy
Rear
Rear
Wiper Stroke Motor

Assy
Clamp
Clamp
Wiper Stroke Motor

Assy
Hole in frame
No. Screw Type

Connectors S9 C.B.SCREW, 3X6, F/ZN-3C
1. Disconnect the connectors (x3). 3. Remove the three screws (S9: ), then remove the Wiper Stroke Motor Assy.
2. Release the cables from the clamps (x5). When installing the Wiper Stroke Motor Assy, align the bush and the hole in the
frame, and then attach it.

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B4 C4 B5
Frame Stay EJ Drive Frame
D4 E4 F4 D5
Rear Rear
Ink Supply EJ Drive Frame
Unit
Cutout
Grounding
wire
Frame Stay
Cable
Clamp E Ring 4
E Ring 6 Bearing B
Pressure
Pump Unit
Bearing A
Maintenance Grounding
Unit wire
Hole No. Screw Type
No. Screw Type
Rib S1 C.B.S-TITE R, SCREW, 3X8, F/ZN-3C
1. Remove one each screw (S1: ) and remove one each Grounding Cable from the following 1. Remove the E Ring 4 and remove the Bearing A.
units. 2. Remove the E Ring 6 and remove the Bearing B.
Ink Supply Unit (x1), Pressure Pump Unit (x1), Maintenance Unit (x1) 3. Remove the four screws (S1: ), then remove the EJ Drive Frame.
2. Remove the four screws (S1: ).
3. Release the two cables from the Cable Clamp, then remove the Frame Stay.
 When installing the Frame Stay, insert the lower rib into the hole on the frame and
then fit the upper rib with the cutout of the frame.
 Pull the two cables connecting to the Pressure Pump Unit around the Cable Clamp
installed to the Frame Stay as shown above.

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EJ Drive Frame
B6
PF Belt
Rear D6
Rear
Timing Belt
Duplex Drive Shaft
EJ Drive Frame
Tensioner
Tensioner PF Belt
Belt Drive Shaft Assy
When installing the EJ Drive Frame, check that an appropriate tension is applied to 1. Remove the PF Belt from the Belt Drive Shaft Assy and Duplex Drive Shaft.
the timing belts (x2) by the tensioners.

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Wiper Valve Assy

C5
Wiper Valve Assy
Rear
Wiper Joint Tube

Wiper Valve Assy
Wiper Valve Assy
Ink Supply Hole Cap Wiper Joint Tube

Wiper Valve Assy
Connection
Hole
No. Screw Type Hook No. Screw Type

S13 C.B.SCREW, 3X12, F/ZN-3C S9 C.B.SCREW, 3X6, F/ZN-3C
1. Remove the two screws (S13: ) fixing the Wiper Joint Tube. When installing the Wiper Valve Assy, be careful while handling it because there is a
C H E C K The Ink Supply Hole Cap used in the next step is included with the Relay Ink Path possibility that ink adhered to the connection hole will get on it.
P O IN T
Assy supplied as the ASP.
3. Remove the two screws (S9: ), then remove the Wiper Valve Assy.
2. Remove the Wiper Joint Tube, then attach the Ink Supply Hole Cap to the connection parts
of the tips and fix it with the hooks (x4).

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Belt Drive Shaft Assy Wiper Cleaner Motor Assy

D7 E5 F5
Rear Rear
Connectors
PF Belt
Clamps
Bearing Hole in the frame
Clamps

Wiper Cleaner Motor Assy
1. Remove the PF Belt, then remove the Belt Drive Shaft Assy. 1. Disconnect the connectors (x3).
When attaching the Belt Drive Shaft Assy, insert the bearing in the hole in the frame 2. Release the cables from the clamps (x4).
and slide the PF belt onto the pulleys, then check that it rotates smoothly.

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Wiper Cleaner Motor Assy
Wiper Valve Assy

Rear F6
Wiper Cleaner Motor Assy Wiper Joint Tube

Wiper Valve Assy
Ink Supply Hole Cap Wiper Joint Tube
Positioning Hole and Dowel

No. Screw Type No. Screw Type Hook
3. Remove the three screws (S9: ), then remove the Wiper Cleaner Motor Assy. 1. Remove the two screws (S13: ) fixing the Wiper Joint Tube.
When installing the Wiper Cleaner Motor Assy, align the positioning holes of the C H E C K The Ink Supply Hole Cap used in the next step is included with the Relay Ink Path
P O IN T
Wiper Cleaner Motor Assy and Dowels of the Frame, and then attach it. Assy supplied as the ASP.
2. Remove the Wiper Joint Tube, then attach the Ink Supply Hole Cap to the connection parts
of the tips and fix it with the hooks (x4).

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Wiper Valve Assy
Wiper Assy
Rear F7
Rear
Wiper Assy
Wiper Valve Assy
Wiper Valve Assy

Dowels
Connection
Hole

Holes of Wiper Carriage S24 SCREW,M3,STEP TYPE
S9 C.B.SCREW, 3X6, F/ZN-3C
When installing the Wiper Valve Assy, be careful while handling it because there is a C H E C K The screws fixing the Wiper Assy have locking washers.
P O IN T
possibility that ink adhered to the connection hole will get on it.
3. Remove the two screws (S9: ), then remove the Wiper Valve Assy. 1. Remove the two screws (S24: ), then remove the Wiper Assy.
When installing the Wiper Assy, align the Dowels at the bottom with the holes in the
Wiper Carriage, and then attach it.

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7.3.3.14 Ink System 3/3
OUTLINE
Time
Total
Relay Ink Path Assy A 9 min 35 sec --- 9 min 35 sec
Interlock Switch, Valve

B 15 min 45 sec --- 15 min 45 sec
Unit

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Start
A1 B1 SCN Rear Cover A8 Reverse Guide Plate B8 Belt Cover

(→P. 720) (→P. 725) (→P. 732)
A2 B2 NFC Cover A9 Remove the Head Joint, Air B9 Front Housing Assy
(→P. 720) (→P. 725) (→P. 732)
A3 B3 SCN Housing Cap A10 Remove the Head Joint, ink B10 Housing FD
(→P. 721) (→P. 726) (→P. 733)
A4 B4 Open the ADF/SCN A11 Housing Rear, Right B11 Paper Guide End Assy
(→P. 721) (→P. 727) (→P. 734)
A5 B5 Front Tray Guide A12 Housing Rear, Left B12 Interlock Switch, Valve Unit
(→P. 723) (→P. 728) (→P. 735)
A6 B6 Rear Tray Guide A13 Open the Board Box

(→P. 724) (→P. 728)
A7 B7 Cable Cover A14 Frame Stay

(→P. 724) (→P. 729)
A15 Relay Ink Path Assy ★ C H E C K Parts with a star need operation or adjustment/indication
(→P. 730) P O IN T before or after repair work. See "7.2.3 Adjustments

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A1 B1 A2 B2
SCN Rear Cover NFC Cover
Rear
SCN Rear Cover
NFC Cover Inner
NFC Cover
Rib
Groove
S18 C.SHOULDER S-TITE, SCREW, 3X5 S3 C.B.S-TITE, SCREW, 3X8, F/ZB-3C
1. Remove the three screws (S18: ), remove the SCN Rear Cover. 1. Remove one black screw (S3: ).
2. Slide the NFC Cover in the direction of the arrow, and remove it.
To install the NFC Cover, fit the four Ribs of the NFC Cover to the Grooves of the
NFC Cover Inner, slide it in the rear direction.

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A3 B3 A4 B4
SCN Housing Cap Open the ADF/SCN.
ADF Unit SCN Housing

Cap ADF Cover
ADF Unit
Hook
No. Screw Type

S8 C.B.S-TITE(P4), SCREW, 3X12, F/ZN-3C
1. Open the ADF Unit. 1. Close the ADF Unit.

2. Insert something whose edge is thin such as tweezers to disengage the hook, then remove 2. Remove the two screws (S8: ).
the SCN Housing Cap. 3. Open the ADF cover.

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Open the ADF/SCN. Open the ADF/SCN.
Top ADF Unit Rear
ADF Cover
ADF hinge
SCN Unit
ADF hinge
Marking “x12S” on the

frame No. Screw Type No. Screw Type
Hole A S8 C.B.S-TITE(P4), SCREW, 3X12, F/ZN-3C S1 C.B.S-TITE R, SCREW, 3X8, F/ZN-3C
To prevent ADF Unit from opening by the hinge force, secure the ADF Unit to the If you open the ADF/SCN without removing the screw, the hinges will be damaged.
SCN Unit as follows. It is dangerous if the ADF Unit opens during repair work, so Make sure to remove the screw before opening it.
make sure to secure it firmly.
4. Remove the screw (S8: ) near the marking “x12S” on the frame. 7. Remove the total of four screws (S1: ) on both left and right of the ADF Hinge.
5. Secure the ADF Unit to the SCN Unit by inserting the screw (S8: ) removed in step 4 into
the hole A and tightening it.
6. Close the ADF cover.

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Open the ADF/SCN.

A5 B5
Front Tray Guide
ADF Unit
Bracket
Stacker Unit
SCN Unit
Hole
Front Tray Guide
Hook Lever
SC Arm
Hook
Stacker Lever
No. Screw Type

Before proceeding to the next step, make sure: 1. Open the Stacker Unit.
• The four screws on the ADF Hinge are removed. 2. Remove one screw with stopper (S10: ).
• The ADF Unit and the SCN Unit are secured. (p.676) 3. Slide the Front Tray Guide in the direction of the arrow, then remove it while avoiding the
8. Set up the SC Arm while lifting up the ADF Unit and SCN Unit. Stacker Lever.
9. Fix the Bracket at the lower of the SCN Unit by the hook of the SC Arm to support the C H E C K If the Stacker Unit is fully opened, it is difficult to remove the Front Tray Guide. To
ADF Unit and SCN Unit. P O IN T
remove it easily, slightly open the Stacker Unit after loosening the screw.
C H E C K  Make sure the Hook Lever on the SC Arm clicks in place and the bracket is
P O IN T
secured firmly. When installing the Front Tray Guide, align the two hooks with the holes of the
 To close the ADF Unit and SCN Unit, push the Hook Lever of the SC Arm, and Stacker Unit, and then attach it.
remove the Bracket of the SCN Unit from the SC Arm.

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A6 B6 A7 B7
Rear Tray Guide Cable Cover
Housing
Frame
Hole Rear Tray Guide
Cable Cover
Hook
Stacker Unit Hook

S10 C.B.SCREW, 3X6, F/ZN-3C S3 C.B.S-TITE, SCREW, 3X8, F/ZB-3C
1. Remove one screw with stopper (S10: ). 1. Remove the two black screws (S3: ), slide it in the direction of the arrow, and remove the
2. Slide the Rear Tray Guide in the direction of the arrow, then remove it. Cable Cover.
C H E C K If the Stacker Unit is fully opened, it is difficult to remove the Rear Tray Guide. To To install the cable cover, hook the seven hooks on the holes of frame (x4) and
P O IN T
remove it easily, slightly open the Stacker Unit after loosening the screw. housing (x3).
When installing the Rear Tray Guide, align the two hooks with the holes of the
Stacker Unit, then attach it.

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A8 A9
Reverse Guide Plate Remove the Head Joint, Air
Stacker Unit
Dowel 2 Head Unit
Cutout B
Dowel
Positioning Hole Head Joint, Air
Reverse Guide Plate
Cutout A Positioning Hole

Dowel 1 Dowel No. Screw Type No. Screw Type
1. Open the Stacker Unit as wide as it goes. 1. Remove the two screws (S12: ), then remove the Head Joint, Air from the Head Unit.
2. Remove the two screws with stopper (S10: ).
3. Lift up the Reverse Guide Plate a little.
4. Remove the cutout A of the Reverse Guide Plate from the dowel 1, remove the cutout B of
the Reverse Guide Plate from the dowel 2, and remove the Reverse Guide Plate.
When installing the Reverse Guide Plate, fit the dowel (x2) to the positioning hole
(x2) of the Reverse Guide Plate.

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Remove the Head Joint, Ink

A10
Remove the Head Joint, ink
Head Joint Cap Head Joint, Ink
Ink Tube
Tube Clip
Head Unit
Hook
Head Joint, Ink
No. Screw Type

When the Head Joint, Ink is removed, the ink may be discharged from the Head Joint, C H E C K The Head Joint Cap is contained to the Relay Ink Path Assy supplied as ASP.
P O IN T
Ink. Take care not to contaminate the periphery.
C H E C K The Tube Clips used in the next step are equipped to the container inside of the front 3. Remove the Head Joint, Ink, attach the Head Joint Cap to the connection point of the tip,
P O IN T
cover. and then fix it with the hook (x2).
1. Hold all the ink tubes shown above two by two by the Tube Clip (x2).
2. Remove the two screws (S12: ).

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Remove the Head Joint, Ink

A11
Housing Rear, Right
Hole Head Joint Cap
Rear Right
Hook
Hook
Rear Right Housing
Dowel
Hook
Dowel
No. Screw Type
4. Hook the hook of the Head Joint Cap on the hole of the printer to fix the Head Joint, Ink. 1. Remove the six screws (S7: ).
2. Slide the Rear Right Housing in the direction of the arrow, then disengage the three hooks.
3. Remove the Rear Right Housing while remove the two dowels.

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A12 A13
Housing Rear, Left Open the Board Box
Rear Left Rear
Board BOX
Rear Left Housing
Hook
Hook Rib
S7 C.B.S-TITE(P4), SCREW, 3X10, F/ZN-3C S1 C.B.S-TITE R, SCREW, 3X8, F/ZN-3C
1. Remove the three screws (S7: ). 1. Remove the three screws (S1: ).
2. Slide the Rear Left Housing in the direction of the arrow to disengage the two hooks, and 2. Lift up the Board BOX a little, disengage the two hooks, and open the Board BOX.
remove the Rear Left Housing.

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Open the Board BOX

A14
Frame Stay
Right side Board BOX Fixing Wire
Rear
Ink Supply
Unit
Cutout
Grounding
wire
Hook
Frame Stay
Cable
Rib Clamp
Board BOX
Pressure
Pump Unit
Maintenance Grounding
Unit wire
Hole
No. Screw Type
Rib S1 C.B.S-TITE R, SCREW, 3X8, F/ZN-3C
3. To fix the Board Box while it is in the open state, remove the Board Box fixed wire from 1. Remove one each screw (S1: ) and remove one each Grounding Cable from the following
the Rib of the Board Box and hook it onto the hook on the printer side. units.
Do not attempt to close the Board Box while the Board Box Fixed Wire is hooked Ink Supply Unit (x1), Pressure Pump Unit (x1), Maintenance Unit (x1)
onto the hook on the printer side because the Board Box Fixed Wire will be bent and 2. Remove the four screws (S1: ).
the Board Box will become unable to be fixed. 3. Release the two cables from the Cable Clamp, then remove the Frame Stay.
 When installing the Frame Stay, insert the lower rib into the hole on the frame and
then fit the upper rib with the cutout of the frame.
 Pull the two cables connecting to the Pressure Pump Unit around the Cable Clamp
installed to the Frame Stay as shown above.

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Relay Ink Path Assy

A15
Relay Ink Path Assy
Rear
Rear
Gray tube
Ink Tube
Relay Ink Path Assy

Tube Clip
Relay Ink Path Assy Supply Joint, Ink Relay Ink Path Assy
Gray tube Supply Relay Joint, Air
No. Screw Type

Gray tube is connected to the ink collection pack to prevent ink from leaking to 2. Remove the two screws (S14: ), then remove the Supply Relay Joint, Air.
outside the printer. Make sure no ink collects on the ink tray in the unit. When the Supply Ink Joint is removed, the Ink may be discharged from the
connection point. Take care that the surroundings are not soiled.
1. Disconnect the gray tubes (x2) from the Relay Ink Path Assy.
C H E C K The Tube Clips used in the next step are attached to the container inside of the Front
P O IN T
Cover.
3. Clip all the Ink Tubes shown in the figure above in twos with the Tube Clips (x2).
4. Remove the two screws (S14: ) fixing the Supply Joint, Ink.

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Relay Ink Path Assy Relay Ink Path Assy
Rear Rear
Hook and Rib
Supply Joint, Ink Holes in Frame Stopper Ring
Relay Ink Path Assy
Relay Joint Cap
Protrusion
Groove
No. Screw Type
Hook
C H E C K  The Relay Joint Cap used in the next step is included with the Relay Ink Path Assy 6. Remove the three screws (S1: ), and then remove the rib of the Relay Ink Path Assy from
P O IN T
supplied as ASF. the hook on the frame.
 Engage the protrusions on the Supply Joint, Ink with the grooves on the Relay 7. Remove the Stopper Rings (x2).
Joint Cap. When pulling out the Relay Ink Path Assy from the hole in the frame, take care that
the part connected with the head at the front does not catch on the frame.
5. Remove the Supply Ink Joint, attach the Relay Joint Cap to the connection parts of the tips,
and then fix it with the hooks (x4).
8. Pull out the Relay Ink Path Assy from the hole in the frame in the direction of the arrow,
and remove it.

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B8 B9
Belt Cover Front Housing Assy
Front
Front Cover
Hinge
Front Cover
Tab
Belt Cover
No. Screw Type

1. Open the Front Cover. 1. Raise up the Front Cover and remove it from the Hinge.
C H E C K The screw of the belt cover cannot be removed because there is a stopper.
P O IN T
2. Loosen the two screws (S4: ), then remove the belt cover in the direction of the arrow.
Insert the tab (x2) into the hole of the front housing before installing the belt cover.

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Front Housing Assy

B10
Housing FD
Front
Front Housing Assy I/C Cover

Stacker Unit
Housing FD

S7 C.B.S-TITE(P4), SCREW, 3X10, F/ZN-3C S3 C.B.S-TITE, SCREW, 3X8, F/ZB-3C
2. Open the I/C Cover. 1. Close the Stacker Unit.

3. Remove the 11 screws (S7: ), then remove the Front Housing Assy. 2. Remove the four black screws (S3: ), then remove the Housing FD.

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Paper Guide End Assy

B11
Right Side Paper Guide End Assy
Connector Connector
Front
Bearing
Clamp
Shaft of EJ Roller 5
Connector
Stopper Ring
Cutout Part No. Screw Type

1. Remove the Stopper Ring. 3. Disconnect the connectors (x3).

2. Remove the bearing, then hook the shaft of EJ Roller 5 onto the cutout part of the Frame. 4. Release the cable from the clamp.
5. Remove the three screws (S1: ).

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B12
Interlock Switch, Valve Unit
Right Side EJ Roller 5

Shaft, Interlock Switch, Valve Unit
Interlock Switch, Valve Unit
Insert the tips of the

comb-shaped part of
EJ Roller 5 the Paper Guide End Paper Guide End Assy
Assy into this part and
attach the assembly.
Air Tube
Shaft, Interlock Switch, Valve Unit
Star Wheel Parts Tips of Comb- No. Screw Type

shaped Part
Be careful not to touch the Static Eliminator Brush of the Paper Guide End Assy when 1. Remove the Air Tube.
attaching the Paper Guide End Assy. 2. Remove the two screws (S1: ).
3. Slide the Interlock Switch, Valve Unit in the direction of the arrow and remove the Shaft,
6. Remove the Paper Guide End Assy in the direction of the arrow. Interlock Switch, Valve Unit, then remove the Interlock Switch, Valve Unit.
Insert the tips of the comb-shaped part of the Paper Guide End Assy between the EJ Make sure you connect the Air Tube properly.
Roller 5 and Star Wheel Parts shown in the figure above while lowering the Star
Wheel Parts with a finger.

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7.3.3.15 Paper Feed
OUTLINE
Time
Total
Belt Drawer Unit A 3 min 30 sec --- 3 min 30 sec
PG Motor B 6 min 20 sec 40 sec 7 min
Anti Static Brush

C 6 min 35 sec --- 6 min 35 sec
Positioning Motor
Anti Static Brush D 23 min 40 sec 2 min 20 sec 26 min

Confidential
Start
A1 Belt Cover B1 C1 Housing Rear, Right D9 Register Unit D17 Rear Tray Guide
(→P. 738) D1 (→P. 740) (→P. 747) (→P. 754)
A2 Belt Drawer Unit ★ B2 C2 Housing Rear, Left D10 Belt Cover D18 Cable Cover
(→P. 738) D2 (→P. 741) (→P. 748) (→P. 755)
B3 C3 Open the Board Box D11 Belt Drawer Unit D19 Reverse Guide Plate
D3 (→P. 741) (→P. 748) (→P. 755)
B4 C4 Paper Dust Duct Leg D12 SCN Rear Cover D20 Lift the head
D4 (→P. 742) (→P. 750) (→P. 756)
B5 PG Motor C5 Anti Static Brush D13 NFC Cover D21 Anti Static Brush ★
Positioning Motor
(→P. 743) D5 (→P. 751) (→P. 757)
(→P. 743)
D6 Cassette Unit, C1 D14 SCN Housing Cap

(→P. 744) (→P. 751)
D7 Cable Cover C1, Upper D15 Open the ADF/SCN.

(→P. 746) (→P. 752)
D8 Paper Assist Assy D16 Front Tray Guide

(→P. 746) (→P. 754)
C H E C K Parts with a star need operation or adjustment/indication

P O IN T before or after repair work. See "7.2.3 Adjustments

Confidential
A1 A2
Belt Cover Belt Drawer Unit
Front Cover
Tab
Belt Cover
No. Screw Type

1. Open the Front Cover.

P O IN T

Confidential
Paper Feed Belt Unit
Front
Connector
MP Tray Unit
Connector
(With lock)
No. Screw Type

Paper Feed Belt Unit S16 C.B.SCREW, 4X8, F/ZN-3C
1. Pull the lever and open the MP Tray Unit.
2. Remove the cable from the connector (x3).


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B1 C1
Housing Rear, Right
Receiving Part D1
Rear Right
Hook
Belt Drawer Unit Rail Part
Rear Right Housing
Dowel
Hook
Paper Feed Belt Unit Dowel

No. Screw Type
Do not touch the surface of the Paper Feeder Belt directly. 1. Remove the six screws (S7: ).
This Feeder Belt adopts the electrostatic absorption system. The poor suction caused 2. Slide the Rear Right Housing in the direction of the arrow, then disengage the three hooks.
by the dirty or damaged surface of the belt results in the defective paper conveyance. 3. Remove the Rear Right Housing while remove the two dowels.
4. Pull out and remove the Paper Feed Belt Unit in the direction of the arrow.
When installing the Paper Feed Belt Unit, fit the rail part of the Paper Feed Belt Unit
to the receiving part of the printer as shown above.

Confidential
B2 C2 B3 C3
Housing Rear, Left Open the Board Box
D2 D3
Rear Left Rear
Board BOX
Rear Left Housing
Hook
Hook Rib
S7 C.B.S-TITE(P4), SCREW, 3X10, F/ZN-3C S1 C.B.S-TITE R, SCREW, 3X8, F/ZN-3C
1. Remove the three screws (S7: ). 1. Remove the three screws (S1: ).
2. Slide the Rear Left Housing in the direction of the arrow to disengage the two hooks, and 2. Lift up the Board BOX a little, disengage the two hooks, and open the Board BOX.
remove the Rear Left Housing.

Confidential
Open the Board BOX

B4 C4
Paper Dust Duct Leg
Right side Board BOX Fixing Wire D4
Rear
Dowel and Positioning hole

Hook
Rib
Paper Dust Duct Leg
Board BOX
No. Screw Type

3. To fix the Board Box while it is in the open state, remove the Board Box fixed wire from 1. Remove the three screws (S1: ), then remove the Paper Dust Duct Leg.
the Rib of the Board Box and hook it onto the hook on the printer side.
When installing the Paper Dust Duct Leg, align the dowels (x3) with the positioning
Do not attempt to close the Board Box while the Board Box Fixed Wire is hooked holes (x3).
onto the hook on the printer side because the Board Box Fixed Wire will be bent and
the Board Box will become unable to be fixed.

Confidential
B5 C5
PG Motor Anti Static Brush Positioning Motor
D5
PG Motor Stopper Ring

Pulley
Clamp
Timing Belt
Stopper Ring
Flange Bush
Connector
Shaft
EJ Drive Frame
Connector Anti Static Brush
Positioning Motor
No. Screw Type
1. Disconnect the connector (x1). 1. Disconnect the connector (x1).

2. Remove the clamp and release the cable. 2. Remove the Stopper Ring (x1), then remove the Flange Bush.
3. Remove the two screws (S9: ). 3. Remove the Timing Belt from the Pulley.
4. Remove the Stopper Ring (x1), then remove the PG Motor from the shaft.

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Anti Static Brush Positioning Motor
Cassette Unit, C1
D6
Right side
Timing Belt
Pulley
Anti Static Brush
Positioning Motor
MP Tray Unit
EJ Drive Frame Multi-Cassette Feed

Cover Assy
Pulley
Lever
Dowel and Positioning hole

No. Screw Type
4. Remove the three screws (S9: ), then remove the Anti Static Brush Positioning Motor. 1. Pull the lever and open the MP Tray Unit.
 When installing the Anti Static Brush Positioning Motor, align the dowels with the 2. Pull the lever Multi-Cassette Feed Cover Assy.
positioning holes (x2).
 Check that the Timing Belt is correctly attached to the Pulley and the Pulley on the
Anti Static Brush Positioning Motor Side.

Confidential
Cassette Unit C1 Cassette Unit C1
Front Front Cassette Front Support
C1: first cassette C2: second cassette C3: third cassette C4: fourth cassette
Cassette Unit C1
C1
C2
C3
C4
3. Pull out the Cassette Unit C1. The Cassette Unit, C1 and the Cassette Unit, C2 to C4 are basically the same. When
4. Remove the Cassette Unit C1 while lifting it a little. shipping, each cassette is customized for which slot it should be used by changing the
Cassette Front Support position as shown above. The Side Register Adjustment is
performed with the Cassette Units installed.
When replacing or exchanging the Cassette Units, attach the Cassette Front Support
correctly according to which slots they are used for and then perform the Side
Register Adjustment.

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Cable Cover C1, Upper Paper Assist Assy

D7 D8
Right side Right Side
Paper Assist Assy
Dowel and Link Lever

Positioning hole
Hole
Cable Cover C1, Upper

S1 C.B.S-TITE R, SCREW, 3X8, F/ZN-3C S1 C.B.S-TITE R, SCREW, 3X8, F/ZN-3C
1. Remove the one screw (S1: ), then remove the Cable Cover C1, Upper. 1. Remove the one screw (S1: ).
 When installing the Cable Cover C1, Upper, align the dowels with the positioning 2. Slide the Paper Assist Assy in the direction of the arrow, and remove it.
holes. When installing the Paper Assist Assy, pass the Link Lever through the hole in the
 Take care not to catch the cable. Paper Assist Assy and then align the tabs (x5) with the cutouts in the frame.

Confidential
Register Unit
Register Unit
D9 Right Side
Right Side
Link Lever Register Unit

Press the Link Lever to lower the Register Connector Clamp
Unit.
Release Lever
Release Lever
Hole
Hole
Register Unit
Register Unit
C H E C K The Register Unit can be kept in the lowered state without moving up and down in 4. Release the clamp, release the cable, and disconnect the connector (x1).
P O IN T
conjunction with the Link Lever by performing the following procedure. 5. Pull out and remove the Register Unit.
 After installing the Register Unit, check that the Register Unit moves up and down
1. Press the Link Lever. in conjunction with the Link Lever.
2. With the Link Lever kept in the pressed state, pinch the Release Levers (x2) at the center in  Fix the cable in the cable clamp so that it does not become caught when the
the direction of the red arrows, and remove the Release Levers from the holes at the left Register Unit moves up and down.
and right ends of the Register Unit.
3. Release your hand from the Link Lever and check that the Register Unit is in the lowered
state.

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Belt Cover Belt Drawer Unit

D10 D11
Front Cover
Tab
Belt Cover
No. Screw Type

1. Open the Front Cover.

P O IN T

Confidential
Front
Connector
MP Tray Unit
Connector
(With lock)
No. Screw Type

Paper Feed Belt Unit S16 C.B.SCREW, 4X8, F/ZN-3C
1. Pull the lever and open the MP Tray Unit.
2. Remove the cable from the connector (x3).


Confidential
SCN Rear Cover

Receiving Part D12
Rear
SCN Rear Cover

Belt Drawer Unit Rail Part

No. Screw Type
S18 C.SHOULDER S-TITE, SCREW, 3X5
Do not touch the surface of the Paper Feeder Belt directly. 1. Remove the three screws (S18: ), remove the SCN Rear Cover.
This Feeder Belt adopts the electrostatic absorption system. The poor suction caused
by the dirty or damaged surface of the belt results in the defective paper conveyance.
4. Pull out and remove the Paper Feed Belt Unit in the direction of the arrow.
When installing the Paper Feed Belt Unit, fit the rail part of the Paper Feed Belt Unit
to the receiving part of the printer as shown above.

Confidential

EPSON WF-C20590 Service Manual - Page701-750

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EPSON WF-C20590 Revision A

Pressure Pump Unit Pressure Pump Unit

Pressure Pump Unit

Tube of Maintenance Unit

Repair work Repair work 701

Rear Air Tube

Wiper Joint Tube

Maintenance Needle Assy

Repair work Repair work 702

Maintenance Unit Maintenance Unit

Wiper Joint Tube Rear left

No. Screw Type No. Screw Type

Repair work Repair work 703

Maintenance Unit Maintenance Unit

Ink Supply Hole Cap Rear

Connection part with the

Repair work Repair work 704

Cap Rise/Fall Motor joint

OK: removing position NG: Head capping position

No. Screw Type

Repair work Repair work 705

Cap Rise/ Fall Motor

No. Screw Type

Repair work Repair work 706

7.3.3.13 Ink System 2/3

PF Belt B 10 min 40 sec --- 10 min 40 sec

Wiper Valve Assy C 15 min 20 sec --- 15 min 20 sec

Belt Drive Shaft Assy D 21 min 35 sec --- 21 min 35 sec

Wiper Cleaner Motor

Wiper Assy F 28 min 2 min 55 sec 30 min 55 sec

Repair work Repair work 707

A1 B1 C1 Housing Rear, Right

A2 B2 C2 Housing Rear, Left

A3 B3 C3 Open the Board Box

B4 C4 Frame Stay A4 Wiper Stroke Motor Assy

B5 EJ Drive Frame C5 Wiper Valve Assy E5 F5 Wiper Cleaner

B6 PF Belt F6 Wiper Valve Assy

D7 Belt Drive Shaft Assy F7 Wiper Assy ?

C H E C K Parts with a star need operation or adjustment/indication

Repair work Repair work 708

Rear Right Rear Left

Rear Right Housing

Repair work Repair work 709

Open the Board BOX

No. Screw Type

Repair work Repair work 710

Wiper Stroke Motor Assy

Wiper Stroke Motor

Wiper Stroke Motor

No. Screw Type

Repair work Repair work 711

Repair work Repair work 712

Duplex Drive Shaft

Belt Drive Shaft Assy

Repair work Repair work 713

Wiper Valve Assy

Wiper Joint Tube

Wiper Valve Assy

Ink Supply Hole Cap Wiper Joint Tube