Service Manual RS2000 Toyota
Service Manual RS2000 Toyota
Service Manual RS2000 Toyota
1. Make sure to turn the power supply off before starting the repair work.
There is risk of electric shock.
2. After removing parts for repair, or others, make sure to secure the electrical safety for the handling of
the sewing machine in accordance with local laws and regulations concerning electrical operations.
There is risk of electric shock.
1. When leaving from the sewing machine, turn off the power supply switch or disconnect the power cable
plug from the power outlet.
There is risk of injury.
1. When replacing parts, use only the genuine parts supplied by us in order to assure the performance
of the sewing machine.
1
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CONTENTS
1.Specifications.......................................................................................... 4
2.Troubleshooting ...................................................................................... 5
1.Improper tightness of stitches......................................................................... 5
2.Skip stitch ....................................................................................................... 7
3.Thread breakage .......................................................................................... 10
4.Broken or bent needle .................................................................................. 13
5.Improper fabric feed ..................................................................................... 16
6.Disrupted pattern .......................................................................................... 18
7.Improper buttonhole sewing ......................................................................... 21
8.Improper lower thread winding length .......................................................... 22
9.Improper upper threading ............................................................................. 23
2
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MEMO
3
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Specifications
1.Specifications
RS2000
Item\Type SD 2D 3D
Stitch width Fixed for each pattern Adjust lever type: Max. 5 mm
RS2000 Series
* Pattern selection dial may be positioned on the right side face.
4
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Troubleshooting
2.Troubleshooting
1.Improper tightness of stitches
Reference
Step Item Diagnosing Method Standard
Page
5
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Troubleshooting
Reference
Step Item Diagnosing Method Standard
Page
Clearance
between
A = 0.3 to 0.6 [Adjustment]
3. Hook shuttle
<Diagnosis> mm page.42
driver and
Remove the extension table, and open
shuttle hook
the shuttle cover.
Remove the bobbin case from the
hook.
When the shuttle driver is turned to left
by rotating the handweel, measure the
clearance (A) between the shuttle driv-
er and the shuttle hook.
6
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Troubleshooting
2.Skip stitch
Reference
Step Item Diagnosing Method Standard
Page
Needle clamp
position:
Just beside
[Remove]
when seeing
Needle bar page.45
from the top
direction [Adjustment]
(right side see-
page.24
ing from the
<Diagnosis> front)
Remove the face cover. A= 0° to 1.5°
Check the needle clamp position.
When seeing from the top, measure the
angle (A) in the figure.
7
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Troubleshooting
Reference
Step Item Diagnosing Method Standard
Page
Clearance <Condition>
<SD>
between A = 0.03 to 0.08 [Adjustment]
Pattern selection dial: "6"
needle and mm page.26
<2D>
hook Pattern selection dial: "4"
<3D>
Pattern selection dial: "3"
Stitch width lever: "0"
<Diagnosis>
Turn the handweel beyond the lower dead
point of needle bar. When the hook blade
point has protruded by 0.1 to 0.2 mm from
the side face of needle, measure the clear-
ance (A) between the needle and the
hook.
1. Needle and
hook
<Condition>
Amount of <SD> A = 1.85 ± 0.15 [Adjustment]
needle Pattern selection dial: "5" mm page.26
elevation <2D>
Pattern selection dial: "3"
<3D>
Pattern selection dial: "4"
<Diagnosis>
Remove the extension table, and open the
shuttle cover.
When the hook blade point is aligned with
the needle center by rotating the hand-
weel, measure the travel distance (A) of
needle bar, regarding the lower dead point
of needle bar as 0.
8
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Troubleshooting
Reference
Step Item Diagnosing Method Standard
Page
Clearance
2. Needle and A = 0.5 to 1.2
between
upper mm [Adjustment]
needle and
plate B = 0.5 to 1.0 page.28
upper plate
spring <Condition> mm
spring
<SD>
Pattern selection dial: "11"
<2D>
Pattern selection dial: "7"
<3D>
Pattern selection dial: "3"
Stitch width lever: "5"
<Diagnosis>
When the needle bar is brought to the low-
er dead point at the right side by rotating
the handweel, measure the clearance
(A, B) between the needle and the upper
plate spring.
[Remove]
Motor belt A = 7.0 to 9.0 page.45
3. Motor belt
tension mm [Adjustment]
page.43
<Diagnosis>
Remove external panels and others.
When pressing the center of motor belt
with a force of 3N, measure the depth of
flexure (A) on the belt.
9
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Troubleshooting
3.Thread breakage
Reference
Step Item Diagnosing Method Standard
Page
Upper
1. Upper thread A = 0.85 to 1.15 [Adjustment]
thread
tension dial N page.33
tension <Condition>
Upper thread tension dial: "5"
Thread: Cotton yarn # 60
<Diagnosis>
Pass the upper thread from the spool of
thread to the thread guide, pull the
thread vertically and measure the ten-
sion (A) when the value has stabilized.
(Using a measuring instrument)
10
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Troubleshooting
Reference
Step Item Diagnosing Method Standard
Page
Clearance
between
shuttle A = 0.3 to 0.6 [Adjustment]
driver and <Diagnosis> mm page.42
shuttle Remove the extension table, and open
hook the shuttle cover.
Remove the bobbin case from the hook.
When the shuttle driver is turned to left
3. Hook by rotating the handweel, measure the
clearance (A) between the shuttle driver
and the shuttle hook.
<Diagnosis>
Check the hook blade point by touching
the hook blade point with finger.
<Condition>
Amount of <SD>
4. Needle and A = 1.85 ± 0.15 [Adjustment]
needle Pattern selection dial: "5"
hook mm page.26
elevation <2D>
Pattern selection dial: "3"
<3D>
Pattern selection dial: "4"
<Diagnosis>
Remove the extension table, and open
the shuttle cover.
When the hook blade point is aligned
with the needle center by rotating the
handweel, measure the travel distance
(A) of needle bar, regarding the lower
dead point of needle bar as 0.
11
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Troubleshooting
Reference
Step Item Diagnosing Method Standard
Page
Clearance
A = 0.5 to 1.2
5. Needle and between
mm [Adjustment]
upper plate needle and
B = 0.5 to 1.0 page.28
spring upper plate
<Condition> mm
spring
<SD>
Pattern selection dial: "11"
<2D>
Pattern selection dial: "7"
<3D>
Pattern selection dial: "3"
Stitch width lever: "5"
<Diagnosis>
When the needle bar is brought to the
lower dead point at the right side by
rotating the handweel, measure the
clearance (A, B) between the needle and
the upper plate spring.
12
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Troubleshooting
Reference
Step Item Diagnosing Method Standard
Page
<Condition>
Needle <SD>
dropping Pattern selection dial: "6"
points <2D> [Adjustment]
A=B
(At Pattern selection dial: "4" page.30
straight <3D>
stitching) Pattern selection dial: "3"
Stitch width lever: "0"
<Diagnosis>
Rotate the handweel, bring down the
needle lower than the surface of needle
plate.
Measure the relative position (A, B) be-
1. Needle and tween the needle and the slot.
needle plate
<Condition>
Needle <SD>
dropping Pattern selection dial: "11"
points <2D>
C = 0.7 ± 0.3 [Adjustment]
(At Pattern selection dial: "7"
mm page.30
maximum <3D>
zigzag Pattern selection dial: "3"
stitching) Stitch width lever: "5"
<Diagnosis>
Rotate the handweel, bring down the
needle lower than the surface of needle
plate.
Measure the relative position (C) be-
tween the needle and the slot.
13
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Troubleshooting
Reference
Step Item Diagnosing Method Standard
Page
Clearance <Condition>
<SD>
2. Needle and between A = 0.03 to 0.08 [Adjustment]
Pattern selection dial: "6"
hook needle and mm page.26
<2D>
hook Pattern selection dial: "4"
<3D>
Pattern selection dial: "3"
Stitch width lever: "0"
<Diagnosis>
Turn the handweel beyond the lower
dead point of needle bar. When the hook
blade point has protruded by 0.1 to 0.2
mm from the side face of needle, mea-
sure the clearance (A) between the nee-
dle and the hook.
14
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Troubleshooting
Reference
Step Item Diagnosing Method Standard
Page
<Condition>
Amount of <SD>
2. Needle and A = 1.85 ± 0.15 [Adjustment]
needle Pattern selection dial: "5"
hook mm page.26
elevation <2D>
Pattern selection dial: "3"
<3D>
Pattern selection dial: "4"
<Diagnosis>
Remove the extension table, and open
the shuttle cover.
When the hook blade point is aligned with
the needle center by rotating the hand-
weel, measure the travel distance (A) of
needle bar, regarding the lower dead
point of needle bar as 0.
Clearance
3. Needle and between A = 0.5 to 1.2
[Adjustment]
upper plate needle and mm B = 0.5 to
page.28
spring upper plate 1.0 mm
<Condition>
spring <SD>
Pattern selection dial: "11"
<2D>
Pattern selection dial: "7"
<3D>
Pattern selection dial: "3"
Stitch width lever: "5"
<Diagnosis>
When the needle bar is brought to the
lower dead point at the right side by rotat-
ing the handweel, measure the clearance
(A, B) between the needle and the upper
plate spring.
15
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Troubleshooting
Reference
Step Item Diagnosing Method Standard
Page
16
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Troubleshooting
Reference
Step Item Diagnosing Method Standard
Page
Sideways
[Adjustment]
1. Feed dog position of A=B
page.34
feed dog
<Diagnosis>
Remove the presser foot.
When the feed dog is brought to the high-
est position (= upper dead point of needle
bar) by rotating the handweel, measure
the sideways position (A, B) of feed dog.
Presser [Adjustment]
2. Presser foot A = 5 to 6 mm
foot height page.37
<Diagnosis>
Set the presser foot.
Lift the presser foot.
Measure the clearance (A) between the
presser foot and the surface of needle
plate.
17
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Troubleshooting
6.Disrupted pattern
Reference
Step Item Diagnosing Method Standard
Page
Needle <Condition>
<SD>
dropping
Pattern selection dial: "6"
points [Adjustment]
<2D> A=B
(At Pattern selection dial: "4" page.30
straight <3D>
stitching) Pattern selection dial: "3"
Stitch width lever: "0"
<Diagnosis>
Rotate the handweel, bring down the nee-
dle lower than the surface of needle plate.
Measure the relative position (A, B) be-
1. Needle and tween the needle and the slot.
needle plate
Needle <Condition>
dropping <SD>
points Pattern selection dial: "11"
<2D> C = 0.7 ± 0.3 [Adjustment]
(At
Pattern selection dial: "7" mm page.30
maximum
<3D>
zigzag Pattern selection dial: "3"
stitching) Stitch width lever: "5"
<Diagnosis>
Rotate the handweel, bring down the nee-
dle lower than the surface of needle plate.
Measure the relative position (C) between
the needle and the slot.
18
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Troubleshooting
Reference
Step Item Diagnosing Method Standard
Page
2. Upper Upper
A = 0.85 to 1.15 [Adjustment]
thread thread
N page.33
tension dial tension <Condition>
Upper thread tension dial: "5"
Thread: Cotton yarn # 60
<Diagnosis>
Pass the upper thread from the spool of
thread to the thread guide, pull the thread
vertically and measure the tension (A)
when the value has stabilized.
(Using a measuring instrument)
19
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Troubleshooting
Reference
Step Item Diagnosing Method Standard
Page
A = 2.8 ± 0.3
3. State of Pattern mm
pattern stitch <Condition> [Adjustment]
(Exclude feeding <SD, 2D> Pattern shall not page.41
SDU type) amount Pattern selection dial: "16" be opened or
<3D> overlapped.
Pattern selection dial: "17"
Stitch width lever: "5"
<Diagnosis>
Measure the maximum feeding amount
(A) during pattern stitch.
4. Stitch width
Lever Stitches must [Adjustment]
lever
position be straight. page.29
(3D only) <Condition>
Pattern selection dial: "4"
<Diagnosis>
Move the stitch width lever to left till the le-
ver is stopped.
Check the state of stitch after sewing a
fabric.
20
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Troubleshooting
Reference
Step Item Diagnosing Method Standard
Page
Left:
<Condition> 35 stitches,
Presser foot: Buttonhole foot standard
Difference Buttonhole stitch adjuster : Center Right:
between <SD> [Adjustment]
30 to 41 stitches
right and left Pattern selection dial: "1" to "4" page.39
Feeding
stitches <2D>
Pattern selection dial: "11" to "14" amounts are
<3D> nearly the same
Pattern selection dial: "8" at right and left.
<Diagnosis>
When about 50 stitches have been
stitched each at right and left sides of
buttonhole, measure the difference of
1. State of stitches at right and left.
buttonhole
Differential
<Condition>
width at Presser foot: Buttonhole foot
Width must be
[Adjustment]
right and left Buttonhole stitch adjuster : Center the same at
page.39
(SD, 2D <SD> right and left.
only) Pattern selection dial: "1" to "4"
<2D>
Pattern selection dial: "11" to "14"
<Diagnosis>
When about 50 stitches have been
stitched each at right and left sides of
buttonhole, measure the difference of
stitch width at right and left.
21
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Troubleshooting
Reference
Step Item Diagnosing Method Standard
Page
<Condition>
Thread: Cotton yarn # 60
Winding Wind-up: When the wound thread contacts
amount of the bobbin stopper and the bobbin A = 1.5 mm or less [Adjustment]
1. Bobbin
lower stops B = 1.5 to 2.0 mm page.36
thread <Diagnosis>
Set the bobbin on the bobbin winder
shaft.
When the bobbin has returned to the
original position (to left) after winding up
the lower thread, measure the states of
winding (A, B).
A: Winding deviation
B: Winding amount
22
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Troubleshooting
Reference
Step Item Diagnosing Method Standard
Page
Threader hook
must pass
Needle
through the [Adjustment]
threader
needle hole page.38
height
without
<Condition> smoothly.
Needle: # 11 to # 16
<Diagnosis>
1. Needle When the needle bar is brought to the upper
threader dead point by turning the handweel, check
the movement of needle threader lever by
pressing it down.
<Diagnosis>
Chech the shape of threader hook.
23
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Adjustment of respective parts
[Diagnosis]
1. Remove the extension table, and open the
shuttle cover.
2. When the needle bar is brought to the lower
dead point by rotating the handweel, mea-
sure the clearance (A) between the needle
point and the shuttle hook center.(Fig. 1)
[Standard]
A = 11.2 ± 0.2 mm (Fig.1)
[Adjustment]
1. Turn the handweel, bring the needle bar to
the lower dead point.
2. Loosen the set screw, adjust the height and
direction of needle bar.(Fig. 2)
3. Tighten the set screw.(Fig. 2)
[Note]
After adjusting the height, confirm the orienta-
tion of needle bar as described in the next
step.
When the needle threader is equipped, con-
firm that the thread passes through properly.
(See:page.23)
[Standard]
Needle clamp position:
Just beside when seeing from the top (Fig. 3)
(Right side seeing from the front)
A = 0° to 1.5° (Fig.3)
24
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Adjustment of respective parts
[Adjustment]
1. See the needle bar height [Adjustment]
above.
[Note]
When the needle threader is equipped, con-
firm that the thread passes through properly.
(See:page.23)
25
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Adjustment of respective parts
[Diagnosis]
1. Remove the extension table, and open the
shuttle cover.
2. When the hook blade point is aligned with the
needle center by rotating the handweel, mea-
sure the travel distance (A) of needle bar,
regarding the lower dead point of needle bar
as 0.(Fig. 1)
[Standard]
A = 1.85 ± 0.15 mm (Fig.1)
[Adjustment]
1. Remove external panels and others to allow
sewing machine seen from the bottom.
(See:page.45)
2. Loosen the screw at the right side of lower
shaft, adjust the position of hook.(Fig. 2)
3. Tighten the screw.(Fig. 2)
[Diagnosis]
1. Turn the handweel beyond the lower dead
point of needle bar. When the hook blade
point has protruded by 0.1 to 0.2 mm from the
side face of needle, measure the clearance
(A) between the needle and the hook.(Fig. 3)
26
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Adjustment of respective parts
[Standard]
A = 0.03 to 0.08 mm (Fig. 3)
[Adjustment]
1. Remove the face cover to see the adjuting
section.(See:page.45)
2. Loosen the adjustment shaft nut at the upper
part of needle and adjust by turning the
adjustment shaft.(Fig. 4)
Right turn increases the clearance.
Left turn decreases the clearance.
3. Tighten the nut.(Fig. 4)
27
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Adjustment of respective parts
[Diagnosis]
1. When the needle bar is brought to the lower
dead point at the right side by rotating the
handweel, measure the clearance (A, B)
between the needle and the upper plate
spring.(Fig. 2)
[Standard]
A = 0.5 to 1.2 mm
B = 0.5 to 1.0 mm (Fig. 2)
[Adjustment]
1. Remove the extension table, and open the
shuttle cover.
2. Remove the shuttle hook cover.
3. Loosen the shuttle hook cover adjustment
screw, adjust the position of upper plate
spring.(Fig. 3)
28
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Adjustment of respective parts
4.Stitch width
(3D only)
[Condition]
Pattern selection dial: "4"
[Diagnosis]
1. Move the stitch width lever to left till the lever
is stopped.
2. Check the state of stitch after sewing a fabric.
(Fig. 1)
[Standard]
Stitches must be straight. (Fig. 1)
[Adjustment]
1. Remove the external panels and others to
see the adjusting section. (See:page.45)
2. Loosen the screw, move the stitch width lever
to left till the lever is stopped.(Fig. 2)
3. Push the stitch width lever till it contacts
stopper, them tighten the screw.(Fig. 2)
29
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Adjustment of respective parts
5.Needle location
Straight needle dropping points
[Condition]
<SD>
Pattern selection dial: "6"
<2D>
Pattern selection dial: "4"
<3D>
Pattern selection dial: "3"
Stitch width lever: "0"
[Diagnosis]
1. Rotate the handweel, bring down the needle
lower than the surface of needle plate.
2. Measure the relative position (A, B) between
the needle and the slot.(Fig. 1)
[Standard]
A = B (Fig. 1)
[Adjustment]
1. Remove the external panels and others to
see the adjusting section. (See:page.45)
2. Turn the eccentric pin, adjust the needle
location.(Fig. 2)
Right turn moves the needle location to "Left".
Left turn moves the needle location to "Right".
[Diagnosis]
1. Rotate the handweel, bring down the needle
lower than the surface of needle plate.
2. Measure the relative position (C) between the
needle and the slot.(Fig. 3)
[Standard]
C = 0.7 ± 0.3 mm (Fig.3)
30
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Adjustment of respective parts
[Adjustment]
1. Remove the external panels and others to
see the adjusting section. (See:page.45)
2. Turn the adjustment screw, adjust the needle
location.(Fig. 4)
31
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Adjustment of respective parts
[Diagnosis]
1. When the needle travels from left to right,
measure the distance (A) from the surface of
needle plate to the needle point.(Fig. 1)
[Standard]
<SD, 2D>
A = 5 to 7 mm
<3D>
A = 3 to 5 mm (Fig. 1)
[Adjustment]
1. Remove the external panels and others to
see the adjusting section. (See:page.45)
2. Loosen the upper shaft width worm set screw,
adjust the phase of pattern cam.(Fig. 2)
3. Tighten the upper shaft width worm set
screw.(Fig. 2)
[Note]
Pay attention not to move the width worm in
the axial direction.
32
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Adjustment of respective parts
7.Thread tension
Upper thread tension
[Condition]
Upper thread tension dial: "5"
Thread: Cotton yarn # 60
[Diagnosis]
1. Pass the upper thread from the spool of
thread to the thread guide. Pull the thread
vertically and measure the tension (A) when
the value has stabilized .
(Using a measuring instrument) (Fig. 1)
[Standard]
A = 0.85 to 1.15 N (Fig. 1)
[Adjustment]
1. Remove the external panels and others to
see the adjusting section. (See:page.45)
2. Turn the upper thread tension dial, adjust the
upper thread tension.(Fig. 2)
Turn to deep side increases the tension.
Turn to front side decreases the tension.
[Diagnosis]
1. After setting a bobbin in the bobbin case, pull
out the lower thread through the lower thread
guide. Measure the tension (A) when the
value has stabilized.
(Using a measuring instrument) (Fig. 3)
[Standard]
A = 0.3 to 0.4 N (Fig. 3)
[Adjustment]
1. Turn the bobbin case adjustment screw,
adjust the lower thread tension.(Fig. 4)
Right turn increases the tension.
Left turn decreases the tension.
33
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Adjustment of respective parts
[Standard]
A = 1.15 ± 0.1 mm (Fig.1)
[Adjustment]
1. Remove the external panels and others to
see the adjusting section. (See:page.45)
2. Turn the adjustment screw at the left side of
lower shaft, adjust the feed dog height.(Fig. 2)
Right turn raises the feed dog.
Left turn lowers the feed dog.
[Diagnosis]
1. Remove the presser foot.
2. When the feed dog is brought to the highest
position (= upper dead point of needle bar) by
rotating the handweel, measure the fore and
aft position (A) of feed dog.(Fig. 3)
[Standard]
A = 1.0 ± 0.5 mm (Fig.3)
[Adjustment]
1. Remove the external panels and others to
see the adjusting section. (See:page.45)
2. Loosen the feed rock arm set screw at the
right side of lower shaft, adjust the fore and
aft position of feed dog.(Fig. 4)
34
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Adjustment of respective parts
[Standard]
A = B (Fig. 5)
[Adjustment]
1. Remove the face cover and the rear cover to
see the adjusting section. (See:page.45)
2. Loosen the feed bar set screws, position the
feed dog at the center between right and
left.(Fig. 6)
35
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Adjustment of respective parts
[Diagnosis]
1. Set the bobbin on the bobbin winder shaft.
2. When the bobbin has returned to the original
position (to left) after winding up the lower
thread, measure the states of winding (A, B).
(Fig. 1)
A: Winding deviation
B: Winding amount
[Standard]
A = 1.5 mm or less (One-sided winding)
B = 1.5 to 2.0 mm (Winding amount) (Fig. 1)
[Adjustment]
1. Adjustment of one-sided winding
(1)Loosen the thread guide plate set screw,
adjust the position of the thread guide
plate up and down.(Fig. 2)
Higher bracket position increases the wind-
ing amount of higher side of bobbin.
Lower bracket position increases the wind-
ing amount of lower side of bobbin.
(2)Tighten the thread guide plate set
screw.(Fig. 2)
36
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Adjustment of respective parts
[Standard]
A = 5 to 6 mm (Fig. 1)
[Adjustment]
1. Remove the face cover to see the adjusting
section. (See:page.45)
2. Loosen the presser bar bracket set screw,
adjust the presser foot height.(Fig. 2)
3. Tighten the presser bar bracket set screw.
(Fig. 2)
[Note]
Confirm that the presser foot is not tilted to
right or left.
37
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Adjustment of respective parts
11.Needle threader
Needle threader height
[Condition]
Needle: # 11 to # 16
[Diagnosis]
1. When the needle bar is brought to the upper
dead point by turning the handweel, check
the movement of needle threader lever by
pressing it down.(Fig. 1)
[Standard]
Threader hook must pass through the needle
hole without smoothly. (Fig. 1)
[Adjustment]
1. Remove the face cover to see the adjusting
section. (See:page.45)
2. Loosen the threader arm set screw, adjust the
height of threader arm.(Fig. 1)
[Standard]
Threader hook should not be bent. (Fig. 2)
[Adjustment]
1. Straighten the threader hook using a screw-
driver or the like, so that hook can pass
through the needle hole smoothly.
2. If the bent cannot be corrected properly,
replace the threader hook.
38
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Adjustment of respective parts
12.Buttonhole sewing
Difference of stitches at right and left
[Condition]
Presser foot: Buttonhole foot
Buttonhole stitch adjuster: Center
<SD>
Pattern selection dial: "1" to "4"
<2D>
Pattern selection dial: "11" to "14"
<3D>
Pattern selection dial: "8"
[Diagnosis]
1. When about 50 stitches have been stitched
each at right and left sides of buttonhole,
measure the difference of stitches at right and
left.(Fig. 1)
[Standard]
Left: 35 stitches, standard
Right: 30 to 41 stitches
Feeding amounts are nearly the same at right
and left (Fig. 1)
[Adjustment]
1. Remove the external panels and others to
see the adjusting section. (See:page.45)
2. Turn the adjustment screw, eliminate the
difference of stitch numbers at right and left.
(SD: Fig. 2, 2D/3D: Fig. 3)
When the stitches at left is coarser than the
right, turn the screw to right.
When the stitches at right is coarser than the
left, turn the screw to left.
[Diagnosis]
1. When about 50 stitches have been stitched
each at right and left sides of buttonhole,
measure the difference of stitch width at right
and left.(Fig. 4)
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Adjustment of respective parts
[Standard]
Width must be the same at right and left. (Fig. 4)
[Adjustment]
1. Remove the external panels and others to
see the adjusting section. (See:page.45)
2. Turn the adjustment screw, eliminate the
difference of stitch width at right and left.
(Fig. 5)
When the width at left is narrower than right,
turn the screw to right.
When the width at right is narrower than left,
turn the screw to left.
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Adjustment of respective parts
13.Feeding amount
(Exclude SDU type)
Pattern stitch feeding amount
[Condition]
<SD, 2D>
Pattern selection dial: "16"
<3D>
Pattern selection dial: "17"
Stitch width lever: "5"
[Diagnosis]
1. Measure the maximum feeding amount (A)
during pattern stitching.(Fig. 1)
[Standard]
A = 2.8 ± 0.3 mm, and
Pattern shall not be opened or overlapped.(Fig.1)
[Adjustment]
1. Remove the external panels and others to
see the adjusting section. (See:page.45)
2. Turn the adjustment screw, adjust the pattern
feeding amount.(SD: Fig. 2, 2D/3D: Fig. 3)
Right turn increases the feeding amount.
Left turn decreases the feeding amount.
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Adjustment of respective parts
[Standard]
A = 0.3 to 0.6 mm (Fig. 1)
[Adjustment]
1. Bend or extending the tip of driver spring,
adjust the clearance between the shuttle
driver and the shuttle hook.(Fig. 2)
[Note]
If it cannot be adjusted, replace the driver
spring.
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Adjustment of respective parts
15.Belt tension
Motor belt tension
[Diagnosis]
1. Remove the external panels and others.
(See:page.45)
2. When pressing the center of motor belt with a
force of 3N, measure the depth of flexure (A)
on the belt.(Fig. 1)
[Standard]
A = 7.0 to 9.0 mm (Fig. 1)
[Adjustment]
1. Loosen a pair of adjustment screws and
adjust the motor position.(Fig. 2)
[Standard]
A = 3.0 to 5.0 mm (Fig. 3)
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Adjustment of respective parts
[Adjustment]
1. Loosen the idler pulley adjustment screw,
adjust the idler pulley position.(Fig. 4)
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Removal and reassembling of main components
45
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