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1-NEEDLE LOCKSTITCH SEWING MACHINE WITH
AUTOMATIC THREAD TRIMMER FOR PROFESSIONAL
TL-98P/98Q
SERVICE MANUAL
R
C O N T E N T S
[1] SPECIFICATIONS OF TL-98P/98Q ................................................................ 1
[2] NAMES OF COMPONENTS ........................................................................... 3
[3] DISASSEMBLY AND ASSEMBLY ................................................................. 3
[4] PRINTED CIRCUIT BOARD DIAGRAM (CONNECTOR LAYOUT) ............. 15
[5] ADJUSTMENTS OF COMPONENTS ........................................................... 16
WARNING :
To avoid the risk of fire, electric shock, injury to persons or damage to components, especially keep the following :
• When disassembling, assembling or adjusting the sewing machine, remove the power plug.
• When assembling, be careful about the electrical cord being caught with other components, damage to the covered parts of the cord or miswiring.
• When replacing the part(s), use the genuine part(s).
[1] SPECIFICATIONS OF TL-98P/98Q
(1) Power switch
ON•OFF 2-step changeover switch (common to lamp) located at the belt cover section of the right-hand side of main unit.
(2) Drive control components
Drive
Control
: Built-in motor timing belt method
: Foot pedal controller method (2 m cord) 50 to 1,500 rpm
Low speed rotation of 50 rpm while needle up/down switch is ON
(3) Table, stand and handle components
Main unit : Portable type main unit with soft case (Case is folded in two and packed with main unit.)
One-touch type auxiliary table knee lifter is provided as standard. (Packed together)
Handle : Pull-up/down from machine main unit type
Table/stand : Separately sold fully-sunken type table and stand can be used.
(4) Arm and bed components
Material
Bed form
: Aluminum die casting arm and bed separate body type
: Flat bed portable type
(5) General mechanism
1. Thread take-up : Slit type link thread take-up for one-touch threading
2. Hook : DB type horizontal full-rotary hook
3. Pressing pressure adjustment : Stepless adjusting screw with pressing pressure indicator method
4. Lighting device : Built in face cover Switch : Slide type Lamp : Halogen lamp
5. Needle thread post : Two posts for small thread spool and large thread spool
Thread guide of thread post is of draw-out type and capable of one-touch
6. Bobbin thread winder
threading
: One-touch action : Starting method by controller Automatic stop when
bobbin thread winding completed
: One-touch threading from thread spool to needle tip 7. Needle thread threading
8. Presser foot : Commercially-available presser foot for industrial sewing machine (SL2)
can be used. (Setscrew type)
9. Lift of presser foot : By lever : 7 mm Max. by lever : 10 mm By knee lifter : 12 mm
10. Thread tension : Disk pressure adjusting type with simplified disk pressure scale
11. Drop feed
12. Power switch
: 2-step changeover by knob method (Feed dog : UP : DOWN)
: ON • OFF 2-step
(6) Feed mechanism
1. Feed amount adjustment
2. Reverse feed stitch
: Dial method ...... Stepless 0 to 6 mm
: Lever method .... Feed amount conforms to that of normal feed stitch.
–
1
–
(7) Special mechanism
1. Automatic thread trimming : Thread trimming switch is used in common for pushbutton type and for
external foot pedal switch type.
Switch fails to work even when pressing it within two seconds after the
2. Needle bar stop position
rotation of thread trimmer.
: Electric brake stop method
Stop by controller : Down stop
Stop by automatic thread trimming : UP stop
Stop by bobbin winder
3. Automatic needle hole threading
: UP stop
: Hook section rotates and automatically returns by lowering threading
4. Needle up/down switch
lever.
: Switch is of pushbutton type and up/down stop can be performed by half
rotation of main shaft when operating switch for a short period of time.
When switch is continuously held ON, sewing machine continuously runs
at a speed of 50 rpm until switch is turned OFF.
5. Prevention of reverse setting of needle : Needle is attachable to normal direction only.
6. Motor protection
Overcurrent
Overheat
: When motor is locked for 0.5 to 1 second due to sudden overload, motor power
is automatically turned OFF and returns to the ON state immediately.
: When motor temperature has abnormally risen, motor power is turned OFF(thermal
cut) and returns to the ON state when temperature has fallen.
(8) Dimensions and weight
Main unit
Weight
: 452W x 219L x 350H (mm)
: 11.5kg
(9) Power consumption
Whole sewing machine : 120V 1.4A 60Hz
Lamp
220 to 230V 95W 50Hz
: 12V 3W (Halogen lamp)
–
2
–
[2] Names of Components
Thread guide base
Presser spring regulator
Indicating needle of presser spring regulator
Face cover
Thread guide No.1
Pressure indicating plate
Thread take-up thread guide
Lamp switch
Thread take-up spring
Presser bar connection thread guide
Lamp bulb
Hand lifter lever
Needle bar thread guide
Needle bar thread bracket
(Hole for auxiliary table support plate)
Thread guide rod
Arm cover asm.
Bobbin winder shaft
Belt cover
Handwheel
Stitch dial
Needle up/down switch
Automatic thread trimming switch
Reverse feed stitch lever
Drop-feed knob
(Hole for auxiliary table support plate)
Bed cover
Side cover
Throat plate asm.
Standard presser foot asm.
Bed cover rubber seat
Hole for knee lifter lever setting
Thread take-up spring adjusting plate
Needle threader lever
[3] Disassembly/assembly
Page
Outer Components
1. Arm cover asm. ...................................... 4
2. Belt cover and motor cover .................... 4
3. Face plate asm. ...................................... 4
4. Bed cover mas. asm. .............................. 5
5. MAIN circuit board asm. ......................... 5
Page
11. Wire holder ............................................. 9
12. Knee lifter lever ..................................... 10
13. Hook driving shaft pulley ......................... 11
14. Hand lifter lever ..................................... 12
15. Drop-feed knob ..................................... 12
Function components
1. Motor asm. and transformer asm. .......... 5
2. Handwheel and clutch ............................ 6
3. Thread tensioner asm. ........................... 6
4. Presser bar ............................................. 7
5. Needle bar .............................................. 7
6. Thread take-up ....................................... 8
7. Reverse feed stitch lever ........................ 8
8. Idler ........................................................ 8
9. Stitch dial ................................................ 9
10. Automatic thread trimming switch case .. 9
Automatic thread trimming components
1. Looper mas. asm. ................................. 13
2. Moving knife arm installing plate mas. asm. ..................... 13
3. Moving knife base mas. asm. ................. 14
4. Thread trimming solenoid mas. asm. ..... 14
–
3
–
Outer Components
1. Arm cover asm.
1
Arm cover setscrew
SM5042005SN
6
Convex of presser spring regulator knob
5
Slit of presser regulating screw
3
Arm cover
4
MAIN circuit board case cover
2
Bobbin winder connector
Disassembly
™ Remove two
1
setscrews.
™ D i s c o n n e c t a n d r e m o v e
2 connector.
Assembly
™
Insert
2
connector.
™ Align
6
convex with
5
slit and tighten the setscrew.
Point
™
There should be no torsion or distorsion in presser spring regulator.
™ Align precisely slit portion with convex portion.
™ Do not press each lead wire.
2. Belt cover and motor cover
1
Belt cover setscrew
SM5041255SN
2
Motor cover setscrew
SM5041255SN
Disassembly
™ Remove four
1
setscrews and remove belt cover.
™ Remove three
2
setscrews and remove motor cover.
Assembly
™ Attach belt cover and tighten
1 setscrews.
™ Attach motor cover and tighten
2 setscrews.
Point
™ There should be no difference in level between belt cover and front face of frame.
™ Make motor cover come closely contact with belt cover.
3. Face plate asm.
Preparation
™ Remove arm cover.
1
Lamp connector
5
Face cover
4
Indicating needle of presser spring regulator
3
Face plate asm.
2
Face plate asm. setscrew
SL5040631SE
6
Hand lifter lever spring
Disassembly
™ Disconnect
1
connector and
6 remove.
™ Remove
2
setscrews and remove
3
face plate asm.
(together with face cover).
Assembly
™ Attach
3
face plate asm., tighten i t w i t h f a c e p l a t e a s m .
2 setscrews, and attach
6
hand lifter lever spring.
™ Insert
1
connector.
Point
™ There should be no difference in level around the cover when face cover is closed.
™ 5
should not come in contact with
4
indicating needle.
–
4
–
4. Bed cover mas. asm.
1
Bed cover setscrew
1
Bed cover setscrew
SM5051255SN
Disassembly
™
Remove six
1
setscrews and remove bed cover.
Assembly
™
Attach bed cover and tighten setscrews.
Point
5. MAIN circuit board asm.
Preparation
™ Remove arm cover asm.
™
Remove MAIN circuit board case
cover and lamp connector.
Note)
3
Setscrew to set the circuit board and cover to circuit board case
Do not insert in the reverse direction. (See page 15.)
Do not loosen this screw.
Disassembly
™
Remove 7 connectors of each lead wire.
™
Cut
6
clip bands (3 places).
™ Remove
2
setscrews and
4 setscrew, and remove circuit board.
3
MAIN circuit board setscrew
2
MAIN circuit board case setscrew A
SL5030831SF
Porality exists.
4
MAIN circuit board case setscrew B SM5031401SE
6
clip band (3 places)
Never loosen this screw.
Assembly
™
Press play of circuit board to attach circuit board to the front side and tighten two setscrews.
™ I n s e r t e a c h l e a d w i r e i n t o connectors.
Point
™ Read the note and understand it.
™ Ther are color indications on the c i r c u i t b o a r d f o r i n s e r t i n g connectors.
Function Components
3
Motor setscrew nut
1. Motor asm. and transformer asm.
Preparation
™ Remove arm cover asm.
™
Remove belt cover and motor cover respectively.
Make a memorandum of cord wiring.
5
Cord guide
5
plate setscrew
-1
SM5030655SN
4
Disassembly
™ Remove cord guide plate
5 setscrews and
5
-1 in previous item, and cut
6
clip band.
™ Loosen
4
cord presser.
™ Remove two
1
setscrews and remove motor asm.
™ Remove two
2
setscrews and remove transformer asm.
Make sure of wiring route.
Assembly
™ Attach transformer and tighten
3
setscrews.
™ Attach motor asm. and tighten
1
setscrews.
™ Fix it with
4
cord presser.
™ Attach cord guide plate asm. and tighten
5
and
5
-1 setscrew.
™ Connect cord guide plate and cord.
1
Motor asm.
setscrew
SM5050855SN
2
Power transformer setscrew
SM5040855SN
Point
™ Loosen
3
nuts to adjust motor tension.
™ Belt tension : the belt should sag
3 to 4 mm when center of belt is applied with 1.96N load.
–
5
–
2. Handwheel and clutch
Preparation
™ Remove belt cover.
™
Remove arm cover.
!0
Groove of handwheel
7
Convex of handwheel bushing
1
Handwheel setscrew
9
Motor pulley
2
Handwheel
6
Groove of
handwheel bushing
5
Hook portion of clutch spring
4
Angle portion of clutch spring
When removing motor pulley, remove cord guide plate setscrews
5
and
5
-1 in previous item.
3
Groove of clutch spring support
8
Handwheel bushing stopper pin
Disassembly
™
Remove
1
setscrew.
™ R e m o v e c o r d g u i d e p l a t e setscrew and remove cord guide plate asm.
™
Remove
3
spring support.
™ Move
4
in the direction where clutch spring is released and remove clutch spring.
™
Face
6
to motor side and
8
is hard to drop.
™
Draw out
8
and remove
9
.
Assembly
™
Attach
9
and enter
8
.
™ Enter
6
groove of bushing to
8 stopper pin and attach bushing.
™ Enter
5
hook portion of spring to slit in the center of handwheel bushing
™
Enter
5
clutch spring to
3
groove of spring support and attach cord guide plate asm. Then tighten setscrew.
Point
™
Align
7
convex of bushing with
!0
groove of handwheel and attach handwheel. Then tighten setscrew.
™
Clearance provided between convex of
3
clutch spring support and clutch plate is 2
±
0.5 mm.
™ See item 12 on page 19 for adjustment.
3. Thread tensioner asm.
3
Thread take-up spring
4
Thread tensioner asm.
5
Thread tension disk presser
2
Thread tensioner setscrew
SM8040602TP
1
Thread take-up spring adjusting plate setscrew
SL5030801SN
6
Thread take-up spring adjusting plate
Disassembly
™ Remove
1
setscrew.
™ Lower presser foot and remove
2 setscrew.
™ Remove
3
spring together with
4
thread tensioner asm. and adjusting plate.
Assembly
™ Attach
6
adjusting plate and
3 spring to thread tensioner asm.
and attach it to frame. Then fix it with
2
setscrew.
™ T i g h t e n
1
a d j u s t i n g p l a t e setscrew.
Point
™ Place upward the scale of
5 thread tension disk presser.
™ See items 9 and 10 on page 19 for adjustment of pressure and thread take-up spring of stroke.
–
6
–
4. Presser bar
Preparation
™ Remove arm cover asm.
™
Remove face plate mas. asm.
4
Presser spring
™ Remove presser foot and setscrew.
2
Presser spring regulator
Threader support plate setscrew (upper)
SL5040631SE
7
Indicating needle of presser spring regulator
Threader support plate mas. asm.
1
Presser bar connection setscrew
SM8060502TP
5
Presser bar connection asm.
6
Presser bar lifting lever
Threader support plate setscrew (lower)
SM4040655SN
8
Hand lifter lever
3
Presser bar
Disassembly
™ Lower
8
lever and loosen
1 setscrew.
™ Drawing
3
upward, remove
4 spring.
™ Remove
5
connection and
6
lever.
™ Remove regulator
2
screw.
™ Do not remove
7
indicating needle.
3
is hard to remove since secrew mark is attached.
Assembly
™ Attach regulator
2
screw.
™
Set
6
lever to frame, and then set
5
connection.
™
Attach
4
spring when setting
3
presser bar from upper side.
Point
™ Set
4
spring under
7
indicating needle.
™ Lower
8
lever and temporarily tighten it at the position where top end of
3
protrudes approximately
4 mm from frame.
For the adjustment, see item 3 on page 17.
™ Needle should not interfere with presser foot.
1
Needle bar upper bushing felt
5. Needle bar
Preparation
™ Remove arm cover asm.
™ Remove face plate mas. asm.
™ Remove presser bar.
™ Remove needle bar threading guide as well.
Needle bar crank
left screw
2
Needle bar connection setscrew
SM8060510SP
5
Needle bar
6
Needle bar threader guide setscrew
3
Needle bar thread bracket setscrew A1420-001-000
4
Needle clamp
Disassembly
™
Remove
3
and
4
.
™ Remove
1
felt. (Push up needle bar upper bushing
1
felt with
5 and draw it out.)
™
Loosen setscrew of
2
and
6
.
(Pushing needle bar
5
upward is acceptable.)
™ Draw out
5
upward.
™
Remove left
6
screw and remove crank rod.
Assembly
™
Attach crank rod and tighten it with
6
.
™
Perform positioning of needle bar and tighten needle bar connection
2
setscrew.
™ Set needle bar and attach
4
and
3
.
™
Insert
1
into hole.
™ T e m p o r a r i l y t i g h t e n
6
, a n d perform adjustment of vertical height after attaching threader support plate asm.
Point
™
Position of needle bar is the place where upper engraved line of needle bar is aligned with lower end face of needle bar bushing at the needle lower dead point.
See item 2 on page 17 for the adjustment.
™
See item 15 on page 22 for height adjustment of threader hook of threader support plate mas. asm.
–
7
–
6. Thread take-up
Preparation
™ Remove arm cover asm.
™
Remove face plate mas. asm.
™ Remove presser bar.
™
Remove needle bar.
3
1
Thread take-up supporting shaft setscrew
Thread take-up
SM8050602TP
6
Thread take-up support
supporting shaft
4
Needle bar crank
5
Thread take-up
2
Needle bar crank setscrew
Disassembly
™ Loosen
1
setscrew.
™ Loosen two
2
setscrews.
™ Draw out thread
3
take-up supporting shaft.
™ Remove
5
and
6
together with
4
needle bar crank.
Assembly
™ Set needle bar crank to thread take-up, attach it onto main unit and tighten setscrews (2 pcs.).
™ Set
6
to
5
, enter thread take-up supporting shaft
3
to
6
, attach it o n t o f r a m e a n d t i g h t e n
1 setscrew.
Point
™ Tighten setting portion (flat portion) of needle bar crank with screw No. 1.
™ Press
3
shaft to frame side while viewing the torque and tighten
1 setscrew.
7. Reverse feed stitch lever
Preparation
™ Remove belt cover.
5
Feed regulator
4
Reverse feed stitch lever arm
3
Reverse feed stitch lever mas. asm.
1
Reverse feed stitch lever spring
2
Reverse feed stitch lever
setscrew SM5040855SN
Disassembly
™
Remove
1
spring from arm.
™ Remove two
2
setscrews.
™
Remove
4
lever arm from the slot of
5
regulator when removing
3
.
™
Attach
3 setscrews.
lever and set with
2
™
Hook lever spring
1
to lever arm
4
.
Assembly Point
™
Set
4
lever arm to the slot of
5 regulator.
8. Idler
Preparation
™
Remove belt cover.
2
Convex portion of idler installing plate
1
Idler setscrew
SM5040855SN
Disassembly
™ Remove
1
setscrew and remove idler asm.
Assembly
™ Assemble idler and tighten it with
1
setscrew.
™ Belt tension : Belt sags 6 to 7 mm when center of the belt is applied with a 1.96N load.
Point
™ Belt tension can be changed only by removing belt cover. Move
2 convex portion to the left or right.
–
8
–
9. Stitch dial
Preparation
™ Remove arm cover asm.
5
Feed regulating screw
• Stopper screw
• Stopper nut
3
Feed regulating screw stopper asm. setscrew
4
Feed regulating screw
2
Feed regulating pin
1
Stitch dial setscrew
SM8030402TP
Disassembly
™
Loosen two
1
setscrews and remove the dial.
™
Be careful since
2
pin jumps.
™ 3 may not be removed.
(Stopper screw SM8031400TP)
Assembly
™
Turn regulating
4
screw full to the right.
™
Assemble stitch dial with its scale
0 up and tighten
1
screw (2 pcs.).
Point
™
There should be no play in feed regulator when operating lever.
(When scale is 0.)
™ Loosen
5
stopper nut. Make stopper screw strike against regulating
4
screw and tighten nut.
10.Thread trimming switch case
Preparation
™ Remove arm cover asm.
™
Remove motor cover and belt cover.
™ Remove motor mas. asm.
1
Thread trimming switch circuit board case setscrew
SL4040655SN
Disassembly
™ Remove two
1
setscrews in thread trimming switch case.
™ Remove thread trimming switch case.
Assembly
™ Attach the switch case to frame and tighten with
1
setscrews.
Point
™ There should not be no torsion between switch and frame.
11.Wire holder
Preparation
™ Remove outer components.
(Excluding belt cover and
motor cover)
™ Remove presser bar.
2
Wire tube presser setscrew
SM4040655SN
1
Nut of setscrew
(opposite side 9 mm)
NS6620310SP
4
Thread release plate
3
Wire holder setscrew
SM5040855SN
5
Disk pressure release connecting link
6
Thread release plate shaft
–
9
–
Disassembly
™
Remove
1
nut (left side only).
™ Remove
2
setscrew and remove tube presser.
™ R e m o v e
3
s e t s c r e w s a n d remove wire holder mas. asm.
™ Remove setscrew in thread release
6
plate shaft and remove thread release
4
plate.
When removing the wire from frame, make sure of wire route in frame.
Assembly
™
Lay wire in frame.
™ Connect thread release
4
plate w i t h d i s k p r e s s u r e r e l e a s e connecting
5
link.
™
Assemble wire holder mas. asm.
and tighten with
3
setscrews.
™
Fix
2
and
1
in the reverse side of machine bed.
Point
™
Pass the wire through full reverse side of stitch dial.
™
Contact
4
and
5
with each other.
™ For
2
, tube has to come out by
13 mm from tube presser.
™ Tube presser and tube regarding
2
should be on the same face.
See item 5 on page 27 for
1
.
12.Knee lifter lever
Preparation
™
Remove outer components.
(Excluding belt cover and motor cover)
™
Raise presser foot.
1
Knee lifter lever shaft spring setscrew
SM5030455SF
!0
Knee lifter
lever shaft
6
Knee lifter lever
4
Knee lifter link snap pin
2
3
Claw lever actuating plate setscrew SM8040602TP
Knee lifter lever shaft
8
Knee lifter link asm
(claw lever plate)
5
Knee lifter lever shaft stop plate setscrew
SM5040855SN
9
Claw lever
actuating
plate
7
Claw lever shaft setscrew
SM5041255SN
Disassembly
™
Remove snap
4
pin.
™ R e m o v e
5
s e t s c r e w s a n d remove
6
.
™ Remove
1
setscrew and take out lever spring.
™ Lower
2
and turn it to the position where
3
can be removed.
™ Remove
3
, remove claw lever actuating plate, and draw out
2
.
™ Remove claw lever shaft
7 setscrew.
™ Remove
8
link asm..
Assembly
™
Attach
8
to frame and tighten
7 setscrews.
™
Set
2
lever shaft, attach
9
claw lever actuating plate and tighten it with
3
.
™ Attach lever spring and tighten with
1
.
™ Raise frame, attach
6
knee lifter lever to knee lifter lever
!0
shaft, and tighten it with
5
.
™
Enter
4
snap pin.
Point
™
There should not be a play in the axial direction of
2
knee lifter lever shaft.
–
10
–
13. Hook driving shaft pulley
Preparation
™ Remove outer components.
(Excluding stop solenoid)
™ Loosen idler.
™
Remove needle.
9
5
Hook driving shaft pulley eccentric shaft
Thread trimmer cam screw No. 1
3
Hook driving shaft pulley E-ring (E-6)
1
Timing belt
6
Hook driving shaft pulley
eccentric shaft bushing
Slit on
4
hook driving shaft pulley eccentric shaft
A B
!0
Moving knife roller arm
!1
Thread trimmer cam
2
Hook driving shaft pulley eccentric shaft setscrew
SM8040602TP
Hexagon 2.0 mm
(Illustration of hook driving shaft pulley)
Make
7
hook driving shaft pulley come out downward.
6
4
5
8
E-ring groove
Disassembly
™
Remove timing belt from main shaft pulley.
™
Remove
1
belt and loosen two
2
setscrews.
™
Remove
3
E-ring and turn
4
to find a place where backlash in hook driving shaft pulley is large.
™ Press
5
and push out
6
bushing to the right side.
™ Draw out
5
and
6
, and remove
7
following the point of
7
.
Do not make a flaw on
8
E-ring groove when removing
3
E-ring.
Assembly
™
Enter hook driving shaft
7
pulley.
™ Enter eccentric
5
shaft and
6
.
™
Set
3
E-ring.
™ Remove the play in hook driving shaft with
6
and tighten
2 setscrew B.
™
Turn
4
shaft slit to adjust backlash in pulley and tighten
2 setscrew A.
™ Set
1
belt.
Adjust backlash in eccentric shaft by right rotation.
Point
When setting
6
bushing, do not make a flaw on the end face of bushing.
When setting belt onto main shaft, refer to thread trimming timing.
(Simple method)
™
Lower needle bar 1.95 mm from its upper dead point.
™
Turn hook driving shaft and orient
9
screw No. 1 to this side (just front).
™ Enter contact of
!0
roller arm to groove of
!1
cam.
™ Turn hook driving shaft in the reverse direction and set belt at the position where it stops.
–
11
–
14. Hand lifter lever
1
Hand lifter lever
2
Hand lifter lever shaft
3
M4 screw
Disassembly
™
Enter 3 to 4 screw threads of M4 screw (arm cover setscrew) in the hole of hand lifter lever shaft on frame.
™
Hold screw head and draw out the screw. At the same time,
2
hand lifter lever shaft is drawn out.
™ Remove
1
hand lifter lever.
Assembly
™
Enter
2
hand lifter lever shaft into the hole on frame.
™
Tap head of lever shaft to fit the shaft by force and set the shaft to hole in hand lifter lever.
Point
™
End face of lever shaft that is fit by force should not be convex from frame face.
15. Drop-feed knob
1
Drop-feed knob
3
E-ring
5
Wire installing plate asm.
2
DF adjusting arm spring
6
DF adjusting arm asm.
4
Drop feed knob shaft setscrew
Disassembly
™ Set
1
drop-feed knob to "NOT
FEED", remove
4
drop feed knob shaft setscrew, and remove
3
Ering of drop feed knob.
™ Remove
2
DF adjusting arm spring while removing
6
DF adjusting arm asm..
Assembly
™ Pass
1
drop feed knob through
5
wire installing plate.
™ Assemble
2
DF adjusting arm spring while assembling
6
DF adjusting arm asm..
™ Place
3
E-ring to
1
drop feed knob.
™ Assemble drop feed knob shaft with
4
setscrew.
Point
™ It is easy to remove
2
spring when
1
drop-feed knob is set to
“NOT FEED” side.
–
12
–
Automatic Thread Trimming Components
1. Looper mas. asm.
Preparation
™ Remove bed cover.
5
Looper mas. asm.
setscrew
SM5040855SN
3
Looper link asm.
7
Bobbin case
6
Looper
(Center of inner hook)
2
Looper link holding shaft
(Washer A1731090000
E-ring E-3)
4
M o v i n g k n i f e arm spring
1
Looper link B
E-ring E-3
Disassembly
™ Remove
1
E-ring.
™ Remove E-ring and washer of
2
.
™
™
Remove looper link asm of
Remove moving knife arm spring of
4
.
™ Remove setscrews of
5
and remove looper mas. asm.
3
.
Assembly
™ Attach looper mas. asm. and tighten
5
setscrews. (Adjust looper link B shaft to hole.)
™ Hook moving knife arm
4
spring.
™ Set looper link and attach E-ring, washer, etc.
Point
™ Place
6
looper in the center
7 of inner hook and securely tighten
5
.
See item 4-2 on page 27 for adjustment of looper moving amount.
2. Moving knife arm installing plate mas. asm.
Preparation
2
Looper
mas.asm
™ Remove bed cover.
3
Nut (9 mm) of wire
setscrew
™ Remove
2
looper mas. asm..
™
Remove moving knife arm
6
spring.
4
Moving knife arm installing plate mas.
asm. set screw SM4050855SP
Disassembly
™ Remove
1
E-ring.
Do not remove
5
moving knife link.
(Remove together with moving knife arm installing plate.)
™ Remove
3
nut on the left side only.
™
Remove thread trimmer clutch plate
7
collar setscrew and
8 thread trimmer clutch plate collar.
™ Remove two
4
screws and remove installing plate mas. asm.
At this time, simultaneously remove moving knife link.
( To prevent moving knife link from warping)
1
Moving knife link shaft A
E-ring E-4
8
Thread trimmer clutch
5
Moving knife link
7
plate collar
Thread trimmer clutch plate
collar setscrew
6
Moving knife arm spring
Assembly
™ Attach moving knife arm installing plate mas. asm.
Note : See the point on the right side.
™
Temporarily tighten
4
setscrews.
™ Attach
1
E-ring of link shaft.
™
Temporarily tighten
2
looper mas. asm..
™
Attach
6
moving knife arm spring.
™ Determine position of moving knife and securely tighten
4
.
Note : Refer to assembling of moving
knife and looper mas. asm.
™
™
3
setscrew.
Point
™ Set
1
moving knife link and wire
Position of moving knife
Remove hook and see from the reverse side of bed.
(See item 1 on page 23.)
See item 5 on page 27 for adjustment of
3
nut of wire.
–
13
–
3. Moving knife base mas. asm.
Preparation
™ Remove bed cover.
™
Remove throat plate asm.
3
Feed dog
2
M o v i n g k n i f e base mas. asm.
setscrew
SM4040855SP
1
Moving knife link shaft A E-ring
Disassembly
™ Remove
1
E-ring and raise frame.
™ Remove two
2
setscrews.
™ Bring
3
feed dog to its highest position.
™ Raising moving knfe base by hand, lightly press moving knife link A from upper side.
(Release coupling.)
Assembly
™ Attach moving knife base to frame while setting moving knife base to moving knife link shaft A.
™ Temporarily tighten
2
setscrews.
™ Push moving knife base in the direction of right rear 45˚ and securely tighten it.
™ Tilt frame, set moving knife link shaft A and enter
1
E-ring.
Point
™ When assembling, it is better to raise by finger moving knife link
A from below.
4. Thread trimmer solenoid mas. asm.
Preparation
™
Remove outer components.
(Remove arm cover asm., belt cover, motor
1
Thread trimmer
5
Moving knife solenoid link A
Washer and E-ring roller arm
cover and cord guide.)
™ Remove solenoid cover.
™
Remove washer, E-ring and eccentric shaft of
thread trimmer solenoid link A.
4
Moving knife arm
3
Thread trimmer solenoid mas. asm. setscrew
SM5040655SN
Eccentric shaft setscrew
Disassembly
™ Remove washer, E-ring, eccentric shaft and setscrews of
1
thread trimmer solenoid link A.
™
R e m o v e
1
t h r e a d t r i m m e r solenoid link A.
™
Remove three setscrews in thread trimmer solenoid asm. to take it out.
* It is easy to remove setscrews when top end of thread trimmer auxiliary link is moved to the right-hand side of thread trimmer auxiliary cam.
Assembly
™ Attach thread trimmer solenoid and temporarily tighten it with
3 setscrews.
™
Adjust clearance between pin at top end of thread trimmer auxiliary link and thread trimmer auxiliary cam to 0.5 to 1.0 mm and securely tighten
3
setscrews.
™ Fix
1
thread trimmer solenoid link
A with eccentric shaft, washer and
E-ring.
(See item 2 on page 23 and item 3-5 on page 24 for the adjustment.)
Point
™ Move thread trimmer solenoid asm. to the left and right so that pin at top end of thread trimmer auxiliary link comes in contact with thread trimmer auxiliary cam when the solenoid performs suction and securely tighten setscrews.
* Solenoid has to properly work when the solenoid performs suction.
–
14
–
[4] PRINTED CIRCUIT BOARD DIAGRAM (CONNECTOR LAYOUT)
AC120V (TL-98Q)
AC230V (TL-98P)
Plug socket
Lamp
Thread trimmer solenoid
Lamp SW
Power SW
2
Controller
Controller socket
2
2
2
2
CN5
CN4
CN2
CN23
Thread trimmer socket
2
2
CN11
Thread trimmer
SW circuit board
3
3
CN3
MAIN circuit board
CN9
2
CN22
FILTER circuit board
External thread trimmer SW
Bobbin winder SW
CN1
CN6
3
MP detection circuit board
CN7
3
Motor
CN8
4
(AC 22V),
(AC19.8V)
Transformer
CN21
2
AC120V(TL-98Q)
AC230V(TL-98P)
Description
Motor
Power connecting wire
Transformer secondary side
(AC 22V, 19.8V)
Lamp
Bobbin winder SW
MP detection circuit board
Thread trimmer SW circuit board
MAIN circuit board
Terminal Pin
CN7 1
3
CN9
CN8
2
1
5
1
CN2
CN1
2
3
2
1
4
1
2
3
CN6
CN3
3
1
1
2
2
3
Yellow
Red
Red
Gray
Gray
Purple
-
Gray
Cord color
Blue
Brown
Black
Blue
Brown
Yellow
Black
-
Red
Orange
-
Brown
Description
Controller socket
Thread trimmer solenoid
Description
Transformer Primary
side (AC 100V)
Power connecting wire
Power input
(AC 100V)
Description
External thread trimmer socket
MAIN circuit board
Terminal Pin
CN5 1
2
CN4 1
2
FILTER circuit board
Terminal Pin
CN21 1
2
CN22
CN23 1
2
1
2
Cord color
Yellow
White
Blue
Blue
Cord color
White
Blue
Brown
Blue
Blue
Yellow
Thread trimmer SW circuit board
Terminal
CN11
Pin
1
2
Cord color
Black
Brown
(Caution) 1. CN Nos. in frame of MAIN circuit board denote connector Nos. in MAIN circuit board.
2. Portions enclosed with thick lines denote circuit boards.
3. Numerals outside of frame of MAIN circuit board denote number of lead wires.
(MAIN circuit board)
CN6
CN4
CN2
CN1
CN3
CN5
CN8
CN7
CN9
–
15
–
(Caution) Convex portion of connectors, CN7, CN8 and CN9 should be placed up.
Convex portion
Connector insertion diagram
∼
CR1
−
−
CN21 1
∼
L1
CN22
(FILTER circuit board)
L2
ZNR1
WHT
C1
C2
BLU
1
CN23
[5] ADJUSTMENT OF COMPONENTS
General mechanism
1. Height of neddle bar bushing ........................... 17
2. Height of needle bar ......................................... 17
3. Height of presser foot....................................... 17
4. Height of feed dog ............................................ 18
5. Feed timing ...................................................... 18
6. Needle-to-hook timing ...................................... 18
7. Clearance between needle and hook .............. 18
8. Position of bobbin case positioning finger ........ 19
9. Stroke of thread take-up spring
(absorbing amount of thread) ........................... 19
10.Tension of thread take-up spring ....................... 19
11. Bobbin thread tension ...................................... 20
12. Position of bobbin winder clutch ...................... 20
13. Adjustment of bobbin winder ............................ 21
14. Position of threader support plate mas. asm. .. 22
15. Vertical position of threader hook .................... 22
Automatic thread trimmer mechanism
1. Positioning of moving knife arm installing plate
(adjustment of position of moving knife) .......... 23
2. Installing position of thread trimmer solenoid
(moving amount of thread trimmer cam contactor shaft) ................................................ 23
3. Thread trimmer cam timing
(needle-to-cam position) .................................. 24
4. Position and protruding amount of looper
(left/right position and adjustment of movement)
......................................................................... 27
5. Position of nut of wire setscrew
(adjustment of thread tension disk open/close)
......................................................................... 27
–
16
–
General Mechanism
1. Height of needle bar bushing
™ Set dimension from top surface of throat plate to lower end face of needle bar bushing to 67.0
±
0.1mm. (bushing : driving fit)
Lower end face of needle bar bushing
67.0
±
0.1 mm
Top surface of throat plate
2. Height of needle bar
™ Lower dead point of needle bar.
™ Attach length gauge (needle) of #14 needle to needle bar, and adjust dimension from tip of needle to installing plane of throat plate on frame to 17.8
±
0.1 mm.
™ Perform adjustment with needle bar connection setscrew.
Position of standard
Upper engraved line
A
on needle bar aligns with bottom end of
3
needle bar bushing when needle bar is at lower dead point.
3
Needle bar connection setscrew
A
2
17.8
±
0.1 mm
Installing plane of throat plate on frame
Frame
3. Height of presser foot
™ Adjust the height in the state that hand lifter lever is raised.
™ Clearance provided between top surface of throat plate and lower face of presser foot is 7.0
±
0.5 mm.
™ Perform adjustment with presser bar connection setscrew.
Presser foot
Throat plate
7.0
±
0.5 mm
–
17
–
4. Height of feed dog
™ Set stitch dial to 2 and bring feed dog to its highest position.
™ See the height on the rear side of feed dog.
™ Bottom of tooth of feed dog should be aligned with top surface of throat plate.
(Figure on the right side : protruding amount from top surface of throat plate is 1.2
±
0.1 mm.)
™ Perform adjustment with
1
vertical feed shaft arm.
Top surface of throat plate
1.2
±
0.1 mm
2
Shaft arm setscrew
1
Vertical feed shaft arm
5. Feed timing
™ Set stitch dial to P=2.
™ Lower feed dog in the normal feed operation and align it with top surface of throat plate.
™
At this time, clearance provided between needle top and top surface of throat plate is 0
±
0.2 mm.
™ Perform adjustment with feed cam setscrew.
Feed cam setscrew
Needle (HA x 1 #14)
Top surface of throat plate
0
±
0.2 mm
6. Needle-to-hook timing
™
Loosen three setscrews in hook.
™ Adjust blade point of hook and left edge of needle to 0 to 0.2 mm when needle bar lifts by 2.28 mm from its lower dead point.
™
Check clearance between needle and hook, and tighten setscrews.
Remove bobbin case positioning finger to improve the work.
Standard of position of 2 mm from lower dead point of needle bar is that of engraved lines
1
to
2
on needle bar.
(
1
Lower dead point,
2
Position of lifting 2 mm)
2
1
7. Clearance between needle and hook
™ Loosen three setscrews in hook.
™ Adjust blade point of hook to position of 0.2 mm from left edge of needle.
™ Adjust clearance between blade point of hook and needle to 0.02 to 0.07 mm.
™ Temporarily tighten setscrews, check timing, and securely tighten setscrews.
–
18
–
1.33 mm
0 to 0.2
Hook
Lifting amount
2.28 mm
0 to 0.2
Needle
Blade point
0.02 to 0.07 mm
8. Position of bobbin case positioning finger
™ Loosen bobbin case positioning finger
1
setscrew.
™
Make right-hand edge of convex portion of bobbin case positioning finger spring align with
2
righthand edge of needle.
Top view
™ Temporarily tighten setscrew, hold clearance of 0.3
to 0.5 mm between inner hook and bobbin case positioning finger, and securely tighten setscrew.
Front view
Bobbin case positioning finger should not come in contact with hook.
Bobbin case positioning finger should not interfere with hook.
Needle
Needle
0.3 to 0.5 mm
3
Bobbin case positioning finger
1
2
Bobbin case positioning finger spring
9. Momentum of thread take-up spring (absorbing amount of thread)
™ Thread take-up spring has to be installed at position of 10
±
0.5 mm from thread guide as shown in the figure below.
™ Perform adjustment with
1
thread take-up spring adjusting plate.
10.5
±
0.5 mm
Thread tensioner thread guide
Thread take-up spring adjusting plate.
1
Thread take-up spring adjusting plate and setscrew
10. Tension of thread take-up spring
™ Pass needle thread up to
1
thread tensioner thread guide.
™ Lower presser foot and draw needle thread.
™ Adjust tension of thread take-up spring to 0.176 to 0.245N when thread take-up spring starts lowering.
™ For adjustment, loosen thread tensioner setscrew and turn
3
thread tensioner.
™
Turning clockwise = increasing tension of
4
thread take-up spring.
4
Thread take-up spring
Needle thread
2
Thread tensioner setscrew
3
Thread tensioner asm.
1
Thread tensioner thread guide
–
19
–
11. Adjustment of bobbin thread tension
How to adjust
Adjust with adjusting screw so that bobbin thread tension when spun thread #60 is used becomes
0.176
±
0.02N.
Bobbin case
Adjusting screw
Bobbin thread
12. Position of bobbin winder clutch
™ Remove belt cover.
How to adjust
1. Bobbin winder OFF state
Turn
3
thread trimmer clutch plate link collar and adjust so that a clearance of 2
±
0.5 mm is provided between
1
bobbin winder clutch plate and
2
clutch plate spring support, and temporarily tighten
4
setscrew.
2. Bobbin winder ON state
Make sure that bobbin winder clutch plate comes in contact with inner ring of clutch plate spring support and securely tighten thread trimmer clutch plate link collar setscrew.
Bobbin winder shaft base adjusting plate
Bobbin winder OFF
4
Link collar setscrew
3
Thread trimmer clutch plate link collar
Bobbin winder ON
1
Bobbin winder
clutch plate
2
±
0.5 mm
2
C l u t c h p l a t e spring support
To come in contact with each other
–
20
–
13. Adjustment of bobbin winder
[Position of disengaging bobbin winder]
How to adjust
1. Set
1
bobbin presser to the position where it is 16 mm away from
2
bobbin winding shaft.
2. Tighten
4
bobbin winder controller asm. with setscrew when concave portion of
3
bobbin winding shaft base adjusting plate is engaged with convex portion of
4
bobbin winder controller asm..
4
Bobbin winder controller asm.
Setscrew
2
Bobbin winding shaft
16 mm
1
Bobbin presser
To engage with each other
To strike
3
Bobbin winding shaft base adjusting plate
[Position of leaf switch]
How to adjust
1. Adjust so that a clearance of 0.9 mm or more should be provided between
1
leaf switch and
2
bobbin winding shaft base adjusting plate when bobbin winding shaft is ON and so that leaf switch is securely turned ON when bobbin winding shaft is OFF.
Then tighten leaf
3
switch setscrew.
Bobbin winding shaft ON (leaf SW OFF) Bobbin winding shaft OFF (leaf SW ON)
0.9 mm or more
1
Leaf SW
3
Leaf SW setscrew
2
Bobbin winding shaft
base adjusting plate
[Adjustment of amount of bobbin thread wound round bobbin]
How to adjust
1. Tighten
1
bobbin winder switch contactor plate with setscrew at the position where
2
bobbin winder switch is turned OFF when amount of bobbin thread wound round bobbin becomes 18 mm in diameter.
3
Bobbin winder SW contactor setscrew
2
Bobbin winder SW
1
Bobbin winder SW contactor plate
–
21
–
14. Position of threader support plate mas. asm.
How to adjust
™
Open face cover and remove arm cover asm.
1. Temporarily tighten
1
threader support plate mas.
asm. with setscrews.
2. Adjust
1
threader support plate mas. asm. so that position of threader shaft is 10.5 mm, making needle bar as reference. Then securely tighten setscrews
2 and
3
.
Needle bar
Threader shaft
2
Threader support plate setscrew (upper)
10.5 mm
(15.675 mm)
1
Threader support plate mas. asm.
3
Threader support plate setscrew (lower)
15. Vertical position of threader hook
How to adjust
™
Open face cover.
(Perform confirmation with HAX1 #14 needle.)
1. Turn handwheel by hand to bring needle bar near to highest point. Then stop needle bar at position where
1
needle bar guide setscrew can be seen from adjustment hole of
2 threader support plate.
2. Press down
3
threader lever to lowest point and check that clearance between top end of
4
threader hook and top end of needle eyelet is 0 to 0.1 mm when
4
threader hook is turned.
3. Insert hexagonal wrench key (1.5 mm) from adjustment hole of
2
threader support plate and slightly loosen
1
needle bar guide setscrew.
1
Needle bar
guide setscrew
2
Threader
support plate
When hook is lower -> move needle bar guide upward and
temporarily tighten it.
When hook is higher -> move needle bar guide downward and
temporarily tighten it.
4
Threader hook
Perform adjustment while confirming position in terms of needle eyelet.
When hook is out of place in lateral direction, perform correction of bend of hook with tip of a thin screwdriver or the like, or replace
4
threader hook with a new one.
4. When hook is adjusted to aforementioned position, securely tighten setscrews.
Caution : Hook has to smoothly pass needles HAX1 and HLX5 #11 to #16.
0 mm
–
22
–
3
Threader
lever
Automatic Thread Trimmer Mechanism
1. Positioning of moving knife arm installing plate
(Adjustment of position of moving knife)
™ Loosen
1
nut of setscrew
™
Loosen
2
setscrews in installing plate and move installing plate to the right or left to obtain position
A
.
™ Tighten
2
setscrews in installing plate.
2
Moving knife arm
installing plate setscrew
1
Nut of setscrew
Reference (substitution)
Position of moving knife (see from under side of bed.)
Overlapping amount of slot
4
of moving knife base with portion R of moving knife is 0 to 0.5 mm.
(To such an extent that portion R of moving knife is slightly seen from slot
4
)
4
Figure observed from the rear after removing hook.
Counter knife
Moving knife base
Moving knife base
Align top end of moving knife with border of black coloring section and polished plane of counter knife.....
A
2. Installing position of thread trimmer SOL (solenoid)
™ Move
3
thread trimmer solenoid asm. to the right and left to adjust so that clearance between
1 thread trimmer auxiliary link and
2
thread trimmer auxiliary cam is 0.5 to 1.0 mm, and tighten it with
4
setscrews.
When thread trimmer solenoid asm. is set to ON, it has to interlock thread trimmer auxiliary cam.
0.5 to 1.0
1
Thread trimmer
auxiliary link
3
Thread trimmer solenoid
4
Thread trimmer solenoid setscrew
2
Thread trimmer auxiliary cam
–
23
–
3. Thread trimmer cam timing (Needle-to-cam position)
™ Loosen setscrews in
1
thread trimmer auxiliary cam,
2
thread trimmer cam and
3
roller holding cam.
™
Lower needle bar by 37˚ (1.95 mm) from its upper dead point.
4
Thread trimmer auxiliary link
1
Thread trimmer auxiliary cam
™ In this state, fix hook driving shaft and perform positioning of cams of
1
,
2
and
3
.
3-1 Positioning of [thread trimmer auxiliary cam]
™ Make shaft at top end of
4
thread trimmer auxiliary link of solenoid asm. come in contact with
1
thread trimmer auxiliary cam and tighten it with setscrew.
3-2 Positioning of [thread trimmer cam]
™ Face front
5
setscrew No. 1 in thread trimmer cam.
™ Enter
6
thread trimmer cam contactor shaft to groove in
2
thread trimmer cam.
™ Slightly pressing thread trimmer cam to handwheel side, turn it in reverse direction.
™ Tighten thread trimmer cam with setscrews at place where idling term of cam groove (place where rotation is hindered) is finished.
2
Thread trimmer cam
5
Setscrew No. 1
6
Thread trimmer cam contactor shaft
Setscrew No. 2
3-3 Positioning of [roller holding cam]
™ Turn pin of link support plate and make it come in contact with concave portion of
3
roller holding cam.
™ For lateral position, make
3
roller holding cam come in contact with
1
thread trimmer auxiliary cam and tighten it with setscrew.
Link support plate
3
Roller holding cam
Convex portion
3-4 Securely tighten setscrews in respective cams
3-5 Adjustment of eccentric shaft of thread trimmer solenoid link A
™ Fix
1
thread trimmer solenoid link A with
2
thread trimmer clutch plate collar,
3
thread trimmer clutch plate collar setscrew,
4
thread trimmer auxiliary link washer and
5
thread trimmer auxiliary link stopper E-ring.
4
Thread trimmer auxiliary
link washer A31099DC000
5
Thread trimmer auxiliary link
stopper E-ring RE0400000K0
2
Thread trimmer clutch plate
collar A2435033000
Thread trimmer auxiliary link asm.
A2464D250A0
3
Thread trimmer clutch plate
collar setscrew
Looper link arm asm. A1727D250A0A
1
Thread trimmer solenoid link A
–
24
–
3-6 Adjustment of thread trimmer clutch plate collar
™ After assembling
1
thread trimmer solenoid link A, perform adjustment of eccentricity with
2
thread trimmer clutch plate collar (adjustment of clearance between roller holding cam and link arm support plate) and adjust clearance to 1 to 3 mm.
Roller holding cam
Link arm support plate
2
Thread trimmer clutch plate collar
1
Thread trimmer solenoid link A
1 to 3 mm
3-7 Confirmation of working and positioning of link arm fixing plate (Timing of thread trimmer auxiliary cam, thread trimmer cam and thread trimmer holding cam)
™ Set thread trimmer solenoid asm. to ON state, and make pin at top end of thread trimmer auxiliary link perfectly align with
1
thread trimmer auxiliary cam.
™ Rotate sewing machine by hand up to flat section of
1
thread trimmer auxiliary cam (place where it moves to extreme right-hand side). At this time,
2
1
Thread trimmer auxiliary cam
2
Thread trimmer solenoid link A
thread trimmer solenoid link A moves to right-hand side.
™ Looper link arm works and presses moving knife roller arm since
2
thread trimmer solenoid link A moves.
Turn handwheel and confirm time when link support plate pin rides on flat portion of roller holding cam.
™
Confirm that thread trimmer contactor shaft caulked in
3
moving knife roller arm enters groove in thread trimmer cam.
Moving knife arm
™
Press thread trimmer contactor shaft
2 with moving knife arm asm.
a
section of
moving knife roller arm to make it come in contact
3
Moving knife
roller arm
a
–
25
–
™
Insert a clearance gauge of 0.5 mm to contact part of
1
moving knife roller arm asm. and
2
looper link arm asm. and press
2
looper link arm asm. to
1
moving knife roller arm asm.
0.5 spacer
2
Looper link arm
5
Nut
™ In aforementioned state, make plate come in contact with
4 pin, and fix it with setscrew.
3
link arm fixing
link arm support plate
4
Link arm support
plate
Setscrew
1
Moving knife
roller arm
Roller holding cam
3
Link arm
fixing plate
Link arm support plate pin
™ Adjustment of position of
5
nut of wire setscrew
(Refer to item 5 of adjustment of thread tension disk open/close, p.27.)
™
After adjustment of position of looper, tighten looper link setscrew. (Refer to item 4, p.27.)
–
26
–
4. Position and protruding amount of looper
(Left/right position and moving amount)
4-1. Adjustment of left/right position of looper
™ Adjust with looper mas. asm.
2
so that center of inner hook is aligned with center of lopper
1
.
2
Looper mas. asm.
1
Looper and inner hook
3
Looper (Convex that looper cam pushes out)
1
±
0.2 mm
4
Looper cam (Position where it comes in contact with looper)
4-2. Adjustment of moving amount of looper
™ When thread trimmer solenoid is ON, top end of looper comes in contact with bobbin case.
™ Adjust clearance between convex
3
of looper and
4
looper cam to 1
±
0.2 mm. Loosen looper link
5 setscrew to adjust clearance.
4-3. Installing position of looper stopper plate
™ Adjust installing position of stopper so that clearance between looper and looper installing base is 0.5 to 1.0 mm, and tighten stoper plate with setscrew.
5
Looper link setscrew
Looper
0.5 to 1.0 mm
Rubber stopper
5. Position of nut of wire setscrew
Looper installing bace
(Adjustment of thread tension disk open/close)
™ Lower presser foot.
™ Move thread trimmer solenoid link A with thread trimmer auxiliary cam, Thread tension disk has to open at the time when roller rides on thread trimmer auxiliary cam. (Disk rise of 0.5 to 0.7 mm at scale 3.5)
™ Perform adjustment with
2
nut on left-hand side after loosening
3
nut on right-hand side.
™ Perform fixing with nut located outside.
Nut of setscrew (Wrench 9 mm)
3 2
1
Thread tension disk
–
27
–
R
HOUSEHOLD SEWING MACHINE DIVISION
8-2-1. KOKURYO-CHO,
CHOFU-SHI, TOKYO 182-8655, JAPAN
PHONE : (81)3-3480-5054
FAX : (81)3-3480-5037
Copyright
C
2004 JUKI CORPORATION.
All rights reserved throughout the world.
A9902-98P-000
04.08 Printed in Japan (E)
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Table of contents
- 3 [1] SPECIFICATIONS OF TL-98P/98Q
- 5 [2] NAMES OF COMPONENTS
- 5 [3] DISASSEMBLY AND ASSEMBLY
- 17 [4] PRINTED CIRCUIT BOARD DIAGRAM (CONNECTOR LAYOUT)
- 18 [5] ADJUSTMENTS OF COMPONENTS
- 19 1. Height of neddle bar bushing
- 19 2. Height of needle bar
- 19 3. Height of presser foot
- 20 4. Height of feed dog
- 20 5. Feed timing
- 20 6. Needle-to-hook timing
- 20 7. Clearance between needle and hook
- 21 8. Position of bobbin case positioning finger
- 21 (absorbing amount of thread)
- 21 10.Tension of thread take-up spring
- 22 11. Bobbin thread tension
- 22 12. Position of bobbin winder clutch
- 23 13. Adjustment of bobbin winder
- 24 14. Position of threader support plate mas. asm
- 24 15. Vertical position of threader hook
- 25 (adjustment of position of moving knife)
- 25 contactor shaft)
- 26 (needle-to-cam position)