Singer CONFIDENCE 7463 User manual

Service Manual
7463
7465
7467
7469
Confidence
104 72 89-26
16 Oct 2007

-2-
INDEX
Sec. 1 Disassembling of covers - - - - - - - - - - - - - - - - - - - - - - 4-9
Sec. 2 Test mode - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 10-12
Sec. 3 Adjustment of feed dog height - - - - - - - - - - - - - - - - - - 13
Sec. 4 Needle bar height - - - - - - - - - - - - - - - - - - - - - - - - - - - 14
Sec. 5 Needle threader height - - - - - - - - - - - - - - - - - - - - - - - 15-16
Sec. 6 Presser foot height and direction - - - - - - - - - - - - - - - - 17
Sec. 7 Needle position at zigzag stitching - - - - - - - - - - - - - - - 18
Sec. 8 Clearance between needle and shuttle - - - - - - - - - - - - 19-20
Sec. 9 Needle timing to feed dog - - - - - - - - - - - - - - - - - - - - - 21
Sec. 10 Needle timing to shuttle hook - - - - - - - - - - - - - - - - - - 22
Sec. 11 Needle stopper at right position - - - - - - - - - - - - - - - - 23
Sec. 12 Adjustment of thread tension - - - - - - - - - - - - - - - - - - 24
Sec. 13 Zigzag bight & stitch balance - -- - - - - - - - - - - - - - - - - 25-38
Sec. 14 Needle stops at heighest position - - - - - - - - - - - - - - - 39
Sec. 15 Bobbin holder stopper spring- - - - - - - - - - - - - - - - - - 40-41
Sec. 16 Motor belt tension- - - - - - - - - - - - - - - - - - - - - - - - - - 42
Sec. 17 Timing belt tension- - - - - - - - - - - - - - - - - - - - - - - - - 43
Sec. 18 Bobbin holder thread tension- - - - - - - - - - - - - - - - - - 44

-3-
Sec. 19 Electrical parts area
AC power board - - - - - - - - - - - - - - - - - - - - - - - - - - - - 45
CPU board - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -46-48
Switch board - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 49-53
Wiring harness - - - - - - - - - - - - - - - - - - - - - - - - - - - - -54-56

-4-
Sec.1 Disassembling of covers
(1) Face cover side
Remove screw A.
Removescrew Ｂ.
(2) Back cover side
Remove two self-tapping screws.
A
B
D E

-5-
Remove two screws F & G.
Remove screw H.
Loosen screw J with washer.
Remove screw K on bottom side.
F G
H
J
K

-6-
Remove screw L on bottom side.
Remove needle plate by loosening
two screws.
Push up front cove to open inserting
Small screw driver between front and
backcovers.
Open back and front covers.
L

-7-
Pull out front cover.
Open mating portion of front and back
covers using small screw driver.
Push back cover by small
screw driver.
Force front cover open by
small screw driver.
40mm

-8-
Lift up front cover as illustrated.
Lift up front cover as illustrated.
Lower presser foot lever to
removebackcovereasily.

-9-
Disassembling of covers for model 7422
An additional bottom cover is provided on model 7422.
Remove screws S for front cover and then 5 screws on the bottom cover.
Disassembling of covers for model 7424・7426・7428 *7436
An additional bottom cover is provided on model 7424, 7426 ,*7436 and 7428.
Remove screws S for front cover and then 6 screws on the bottom cover.
Bottom cover
S
Bottom cover
S

- 10 -
Sec.2 Test mode
1. Push bobbin winder to the right
2. Push and hold reverse switch in place.
3. Turn on power switch.
4. Release bobbin winder while pushing reverse switch, just after power switch is turned on.
5. LED is lit at the top left corner.
7422, 7442,
7462
7424, 7444,
7464 and
others

-11-
Note: Above operation is to be done in the following manner.
Steps 1 to 3
Steps 4 to 5
Release bobbin winder by the time when LED is lit at extreme right line.

- 12 -
Test mode;
Mode 1:
In case of model 7422, 7442 and 7462, push switch at top right corner after machine is under test
mode as described above, and pattern LED will be lit at top left corner.
In case of other models, push pattern switch at top left corner after machine is under test mode and
the switch will be lit.
Needle shifts from left to center to right position repeatedly with foot control depressed.
Stitch length is set at “0”.
Mode 2:
In case of model 7422, 7442 and 7462, push switch at second row after machine is under test
mode and pattern LED will be lit at extreme left position.
In case of other models, push pattern switch at second position from left and the switch will be lit.
Needle moves at center position with foot control depressed. Stitch length is set at “0”.
Mode 3:
In case of model 7422, 7442 and 7462, push switch at third row after machine is under test mode
and pattern LED will be lit at extreme left position.
In case of other models, push pattern switch at third position from left and the switch will be lit.
Machine sews 11 stitches in forward with length at 2 mm and then same number of stitches in
reverse with length at 2 mm and stops automatically. Needle position is set at center position.

- 13 -
Sec. 3 Adjustment of feed dog height
Checking:
1. Move feed dog to its highest position by turning hand wheel.
Check to see if feed dog height is as illustrated below.
Adjustment:
1. Remove needle plate. Loosen nut with wrench.
2. Adjust height by turning screw as illustrated. Tighten nut securely after adjustment..
0.9 – 1.0 mm

- 14 -
Sec. 4 Needle bar height
Note: Make this checking before checking “Needle timing to shuttle”
Checking:
1. Remove needle plate and bobbin case.
Select straight stitch (center needle position).
Raise needle to its highest position by turning hand wheel.
2. Check to see if distance from needle point to the surface of needle plate is as
illustrated below.
Adjustment:
1. Remove face cover.
2. Loosen screw (A) of needle bar clamp using hex screw driver
and adjust the height of needle bar.
3. Check to see if needle threader operates correctly and there is not interference in vertical
movement of needle bar.
Tighten screw (A) securely after adjustment.
15.5 to 16 mm from
the surface of needle plate
Highest position
of Needle
Needle position
at center
A
B

- 15 -
Sec.5 Needle threader height
Checking:
1. Select straight stitch at center needle position.
2. Raise needle to its highest position by rotating hand wheel towards you.
3. Lowering needle threader lever (A), check and see if hook is inserted into the needle hole.
Adjustment:
1. Remove face cover
2. Turning hand wheel by hand, bring needle bar to its highest position.
3. Loosen of threader stopper screw(B)
4. Insert hook into the upper side of needle-hole moving the needle bar (C).
5. While holding above situation, tighten the screw attaching the threader stopper onto stopper
pin (D).
6. The direction of threader stopper should be facing toward you as the threader stopper (E) may
hit the support.
Added : November, 2006
A
C
D B
E

- 16 -
＊Insert the hook into the upper side of needle hole at all times as the smaller needle size, the
shorter needle hole.
7. If the direction of insert hook is deviated from right position.
・Adjust the hook position with the attached small screw driver.
8. Recheck that the needle threader works correctly.
Added: November 2006
Needle hole Hook
#14 #11 #9
Insert the hook into the
upper side of needle hole.
Hook

- 17 -
Sec. 6 Presser foot height and direction
Checking:
1. Lower the feed dog below the needle plate.
2. Raise the presser foot lever.
3. Check and see if clearance between the needle plate and the presser foot is about 5.6mm.
Adjustment:
1. Remove the face cover, and Raise the presser foot lever.
2. Loosen the screw (A) and adjust the presser foot height moving the presser bar.
3. Tighten the screw securely after checking the presser foot is parallel with the needle plate.
Added : November, 2006
5.6 mm
A
A

- 18 -
Sec. 7 Needle position at zigzag stitching
Checking:
1. Set test mode at 1.
2. Turn hand wheel by hand and see if needle leaves the same clearance at both right
and left end of needle plate hole.
Adjustment:
1. Loosen hex screw (A) and adjust needle position by turning eccentric pin using 7mm
wrench.
b
a
a＝b
A

- 19 -
Sec. 8 Clearance between needle and shuttle
Note: Make this checking before checking “Needle timing to shuttle”
Checking:
1. Remove needle plate, bobbin case and face cover.
2. Set test mode at 1.
3. Shift shuttle hook at the rear of needle by turning hand wheel.
Check to see if needle clearance to shuttle is within 0.05 to 0.15 mm.
Adjustment:
1. Turn screw to either direction as illustrated and adjust needle position by moving support
shaft back and forth.
To decrease clearance, turn screw to counter-clockwise.
Shuttle
0.05～0.15ｍｍ 0.05～0.15ｍｍ
At left position At right position
0.05～0.15ｍｍ
At left position At right position

- 20 -
2. If needle clearance to shuttle at right and left position is not same, adjust position
of fulcrum for needle swing support .
Loosen bolt located under bottom of support plate and adjust position of fulcrum.
3. After adjustment, tighten the bolt securely.
Do not loosen
this screw.