Janome HD9 Sewing Machine Service Manual
Janome HD9 Sewing Machine Service Manual
Janome HD9 Sewing Machine Service Manual
SERVICE MANUAL
MODEL: HD9
INDEX
Replacing the External Parts
Face Plate............................................................................................................................................... 1
Top Cover................................................................................................................................................ 1
Belt Cover................................................................................................................................................ 1
Motor Cover............................................................................................................................................. 1
Base........................................................................................................................................................ 1
Mechanical Adjustment
Needle Bar Height....................................................................................................................................2
Presser Bar Height ..................................................................................................................................2
Feed Dog Height......................................................................................................................................3
Feed Dog Alignment.................................................................................................................................3
Feed Cam Timing.....................................................................................................................................4
Feed Lifting Cam Timing..........................................................................................................................5
Needle to Hook Timing.............................................................................................................................6
Clearance Between Needle and Hook Point............................................................................................6
Hook Stopper Position..............................................................................................................................7
Bobbin Winder Stopper............................................................................................................................8
Check Spring Stroke................................................................................................................................9
Pre-tension Dial........................................................................................................................................9
Knee Lifter Lever....................................................................................................................................10
Needle Threader.....................................................................................................................................11
r
r 1. Face Plate
Remove the setscrew (4x10) q and washer w.
Remove the face plate e.
t
2. Top Cover
y
q
e
3. Belt Cover
Remove the 3 setscrews (4x12) u and the belt
cover i.
u
Pull out the socket connector !7 from the printed
circuit board UD connector !8.
NOTE:
When attaching the belt cover, engage the hooks
with the motor cover.
o
u !0
i 4. Motor Cover
!0
Remove the 2 setscrews (4x16) o,
setscrew (4x12) !0 and remove the motor
!8
!7 !1 cover !1.
5. Base
Remove the 4 hinge screws !2, washers !3,
rubber feet !4 and base washers !5.
Remove the base !6.
To attach:
Follow the above procedures in reverse.
!2
!6
!5
!4 !2
!3
1
Mechanical Adjustment
1. Needle Bar Height
2
3. Feed Dog Height
0.8 to 1.0mm When the feed dog is fully raised the height should be 0.8
to 1.0 mm above the needle plate.
q e
v Tighten the setscrew q.
r
3
5. Feed Cam Timing
To Check:
z Lower the needle bar by turning the handwheel until
the point of the needle is 17.5 mm above the upper
surface of the needle plate q.
x The feed dogs should not move when moving the
reverse stitch lever up and down.
q If the feed dogs move, adjust the feed cam timing as
17.5 mm follows.
To Adjust:
z Remove the base and lay the machine on its back.
w A
B
e
4
6. Feed Lifting Cam Timing
To check:
z Lower the needle bar until the point of needle is 0.4
mm below the needle plate q.
q w To adjust:
0 to 0.1mm
z Remove the base and lay the machine on its back.
r B
c Loosen the setscrew e.
v If the feed dogs are higher, turn the feed lifting cam r
in the direction A.
If the feed dogs are lower, turn the feed lifting cam r
in the direction B.
5
7. Needle to Hook Timing
c Raise the needle bar from the lowest position until the
lower hairline w of the needle bar matches the edge
of the needle bar bushing e.
NOTE:
1.8 to 2.2 mm The needle bar rises 2 mm from the lowest position.
r
v Rotate the hook to match the hook point r with the
e right side of the needle.
1.8 to 2.2 mm
w b Tighten the setscrews q slightly and proceed with the
adjustment of the clearance between the needle and
hook point.
Lowest position
6
9. Hook Stopper Position
7
10. Bobbin Winder Stopper
The amount of thread wound on the bobbin should be
20 to 22 mm in diameter.
w q
8
11. Check Spring Stroke
The amount of the needle thread supplied by the check
spring should be 11 to 15 mm.
r t
9
13. Knee Lifter Lever
The presser foot rises 7 to 8 mm when it is fully raised
with the knee lifter.
NOTE:
Lower the needle bar to the lowest position and check
if the needle cramp does not hit against the presser foot
when it is fully raised.
10
14. Needle Threader
w To remove:
z Remove the face plate.
r
x Pull the threader q out from the threader shaft w.
To attach:
q c Align the groove e of the threader with the pin r on
the threader shaft. Push the threader up until it snaps
e in place.
To adjust:
z If the threader hook q thrusts or hits against either
left or right edge of the needle eye w:
r
w
11
Replacing the Electronic Components
1. Location of the Electronic Components
Driving motor
LED
Machine socket
Capacitor
Power transformer
Printed circuit board MS
Capacitor
Push-pull
solenoid
Bobbin winder
switch
Power transformer
(secondary) LED Driving motor
Machine socket
Slide volume
(secondary)
12
3. Internal Wiring
To prevent the internal wirings from contacting the moving parts or being caught in the joint of the external parts,
the internal wirings should properly be routed and secured as illustrated.
Motor cord
Motor sensor cord
Machine socket cord (primary)
Machine socket cord (secondary)
Push-pull solenoid cord
Capacitor cord
Cord binder
Cord guide (1)
13
4. Circuit Board-A
To remove:
z Remove the top cover.
To attach:
Install the printed circuit board A and secure it with the
setscrews r.
e
b Insert the following connectors:
t Machine socket (primary)
y Power transformer (primary)
u Driving motor
NOTE:
Replace the fuse with the same type and rating.
If there is any trace of burning, browning or other
abnormalities on the printed circuit board A, replace it.
F1 SOC ET-3.15A-250V
F2 SOC ET-3.15A-250V
14
5. Circuit Board-F and Slide Volume
(A) r
w (A)
To remove:
(B) z Removed the top cover.
r
y
x Pull out the printed circuit board F connector q,
slide volume connector w from the printed circuit
board A e.
c
Loosen the 3 setscrew (A). Remove the
t u ornamental panel r.
v
Remove the 3 setscrews (B) and remove the
printed circuit board F t from the panel.
b
Remove the 2 CS-rings y and slide volume u.
To attach:
Follow the above procedure in reverse.
15
6.To Replace the Printed Circuit Board UD
Cord binder
To remove:
z Remove the top cover, belt cover and base.
To attach:
Follow the procedure above in reverse.
16
q 7. Driving Motor
To remove:
z Remove the belt cover and motor cover.
NOTE:
Do not disconnect the connectors by pulling on cord.
To disconnect, grasp the connector, not the cord.
17
8. Driving Motor (continued)
To attach:
e u z Install the driving motor q to the motor bracket w
and attach the motor belt e. Tighten the nuts r
firmly.
w
v Attach the motor cover and belt cover.
7 to 9 mm
18
9. Needle Stop Position
t
v Loosen the setscrew t. Rotate the upper shaft
shielding plate y toward you until the green LED u
turns on.
y
18.7 mm
19
10. Power Transformer
To remove:
w q z Remove the top cover and motor cover.
To attach:
Follow the procedure above in reverse.
e
To attach:
Follow the above procedure in reverse.
e
r
20
12. LED and Printed circuit board UD1
LED
w To replace:
z Remove the face plate and top cover.
To attach:
Follow the procedure above in reverse.
q To attach:
Follow the procedure above in reverse.
e w
21
Adjustment of the Thread Cutter Mechanism
1. Thread Cutter Blade
u
q
To replace:
z Remove the needle plate and base.
To adjust:
z Remove the needle plate and base.
y
2 to 2.5 mm
NOTE:
i Check if there is approximately 5 mm distance between
the tail of the hook wing i and the end point o of the
thread cutter blade when the end point o of the thread
cutter blade is aligned with the center of the needle drop
position u.
Apploximately 5 mm
22
2. Thread Guide Plate
e w q
1.4 mm
23
3. Static Cutter Blade
q
c Loosen the setscrews r and adjust the position of the
static cutter blade e so that the distance between the
center of the needle drop position t and the static
cutter blade e is 4 mm and the left edges of the
static blade and thread cutter blade are aligned.
e
r
4 mm
4 mm
24
4. Needle to Cutter Cam Timing
z Remove the base.
• If the needle point is too high, turn the hook shaft gear
in the direction A.
• If the needle point is too low, turn the hook shaft gear in
the direction B.
NOTES:
Hold the hook so that it will not rotate when turning the
q hook shaft gear.
r e
Check the needle to hook timing and adjust it if
necessary.
u y
u A
25
5. Thread Drawing Lever
r
e
26
6. Auto Tension Release
z Turn the handwheel toward you to raise the needle
0.5 to 1.0mm bar until the needle point is just above the needle
plate.
q
e w
27
Thread Cutter Troubleshooting
The needle thread is not cut. The static cutter is dull. Replace or grind the static cutter blade.
The static cutter blade is Adjust the position of the static cutter blade position
out of position. (see page 24).
The bobbin thread is not cut. The thread cutter blade is Adjust the stroke of the thread cutter blade position
out of position. (see page 22).
The thread guide plate is Adjust the position of the thread guide plate position
out of position. (see page 23).
The thread slips out the The needle to cutter cam Adjust the needle to cutter cam timing (see page 25).
needle eye when starting timing is too late.
sewing.
The thread drawing lever is Adjust the thread drawing lever position (see page 26).
out of position.
The needle thread bunches A too long tail of the needle Adjust the needle to cutter cam timing (see page 25).
up on the wrong side of the thread is left after thread Adjust the position of the static cutter blade position
fabric at the beginning of the cutting. (see page 24).
seam.
The tail of the needle thread The pre-tension is too loose. Tighten the pre-tension.
appears on the right side of
the fabric. The needle to cutter cam Adjust the needle to cutter cam timing (see page 25).
timing is too late.
The static cutter blade is Adjust the position of the static cutter blade position
out of position. (see page 24).
Skipped stitches at the The auto tension release is Adjust the auto tension release (see page 27).
beginning of the seam due not enough.
to a too short tail of the
thread after thread cutting. The needle to cutter cam Adjust the needle to cutter cam timing (see page 25).
timing is too early.
The thread drawing lever is Adjust the thread drawing lever position (see page 26).
out of position.
The static cutter blade is Adjust the static cutter blade position (see page 24).
out of position.
28