Brother CS4000, BC2100, BC2300, RS240, RS250 Service Manual

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SERVICE MANUAL FOR

COMPUTERIZED SEWING MACHINE

LOW-END COMPUTER SERIES

CS4000 BC2100 BC2300 RS240 RS250

ES2000 ES2000t ES2200 ES2010 ES2210 ES2020 ES2220

comfort40E CE4000

CS6000 CS6000b CS6000t CS6000i BC2500 RS260 XR7700

ES2400 ES2410 ES2420 comfort60E CS100t EX-660 BC1000 HS1000

The CD-ROM version of service manual contains movie!

CD-ROM version of service manual contains movies "2. Disassembly"

"3. Assembly".Please click on mark to start the movie.

10.2005.

6.2007.

1. Outline of Mechanism ........................................................................1 - 1

Main Mechanisms ...........................................................................1 - 2

Driveline ..........................................................................................1 - 3

Positions of electronic components ...................................................................1 - 4

Control system block diagram ...........................................................................1 - 5

Control system block diagram ...........................................................................1 - 6

Operation of other electronic components .........................................................1 - 7

2. Disassembly ........................................................................................2 - 1

Main parts ..........................................................................................................2 - 2

Accessory table removal ....................................................................................................................2 - 3

Bottom cover removal .......................................................................................................................2 - 3

Needle plate B assembly removal ......................................................................................................2 - 4

Needle plate B ASSY disassembly ..............................................................................................2 - 4

Face plate assembly removal .............................................................................................................2 - 5

Face plate A ASSY disassembly .................................................................................................2 - 5

Front cover removal ...........................................................................................................................2 - 6

Thread tension holder assembly and thread take-up holder B removal .............................................2 - 7

Thread tension holder ASSY disassembly ..................................................................................2 - 7

Thread take-up holder B disassembly ...........................................................................................2 - 8

LED lamp removal .............................................................................................................................2 - 8

Operation PCB assembly and SSVR PCB assembly removal ...........................................................2 - 9

Button removal ..................................................................................................................................2 - 9

Front panel and LCD removal ...........................................................................................................2 - 9

SV keytop removal ..........................................................................................................................2 - 10

Base plate rubber removal ...............................................................................................................2 - 10

Upper cover thread guide removal ...................................................................................................2 - 10

Main PCB assembly removal ..........................................................................................................2 - 11

Main PCB ASSY disassembly ...................................................................................................2 - 11

Power PCB assembly removal .........................................................................................................2 - 12

Power PCB ASSY disassembly ................................................................................................2 - 12

Inlet assembly removal ....................................................................................................................2 - 12

FC jack removal ...............................................................................................................................2 - 13

Main motor assembly removal ........................................................................................................2 - 13

Main motor ASSY disassembly ................................................................................................2 - 13

Tension pulley assembly removal ....................................................................................................2 - 14

Tension pulley ASSY disassembly ............................................................................................2 - 14

Feed unit assembly removal ...........................................................................................................2 - 14

Upper shaft assembly removal .........................................................................................................2 - 15

Needle-presser unit removal ............................................................................................................2 - 15

Plate spring removal ........................................................................................................................2 - 15

Bobbin base assembly removal ........................................................................................................2 - 16

Bobbin base ASSY disassembly ................................................................................................2 - 16

Bobbin winder assembly removal ....................................................................................................2 - 16

Spool pin removal ............................................................................................................................2 - 17

Bobbin presser removal ...................................................................................................................2 - 17

Thread guide assembly removal ......................................................................................................2 - 17

Base plate rubber removal ...............................................................................................................2 - 18

Feed unit ..........................................................................................................2 - 19

Needle plate A assembly removal ...................................................................................................2 - 20

Needle plate A ASSY disassembly ...........................................................................................2 - 20

Spring removal .................................................................................................................................2 - 20

Inner rotary hook bracket assembly removal ...................................................................................2 - 20

Feed dog removal .............................................................................................................................2 - 21

Vertical adjuster screw assembly removal .......................................................................................2 - 21

Outer rotary hook removal ...............................................................................................................2 - 21

Shaft supporter removal ...................................................................................................................2 - 21

Feed bar removal .............................................................................................................................2 - 22

Needle plate supporter shaft B removal ...........................................................................................2 - 22

Feed arm A assembly removal .........................................................................................................2 - 23

Feed arm B ASSY disassembly ................................................................................................2 - 23

Feed adjuster assembly removal ......................................................................................................2 - 24

Feed adjuster disassembly .........................................................................................................2 - 24

Vertical lever removal .....................................................................................................................2 - 24

FPM holder assembly removal ........................................................................................................2 - 25

FPM disassembly .......................................................................................................................2 - 25

Timing pulley D removal .................................................................................................................2 - 25

Lower shaft assembly removal ........................................................................................................2 - 26

Lower shaft bushing removal ..........................................................................................................2 - 26

Needle-presser unit .........................................................................................2 - 27

Threader hook assembly .................................................................................................................2 - 28

LED lamp left assembly removal ....................................................................................................2 - 28

BH switch assembly removal ..........................................................................................................2 - 28

Thread take-up lever and needle bar crank removal ........................................................................2 - 28

Thread take-up lever link removal ...................................................................................................2 - 29

Needle bar assembly removal ..........................................................................................................2 - 29

Needle bar ASSY disassembly ...................................................................................................2 - 29

Needle holder assembly removal .....................................................................................................2 - 30

Needle holder ASSY disassembly .............................................................................................2 - 31

Presser bar removal ..........................................................................................................................2 - 32

Z zigzag lever assembly removal .....................................................................................................2 - 32

Z zigzag lever disassembly .......................................................................................................2 - 33

Z zigzag camp removal ....................................................................................................................2 - 33

Shaft bushing removal .....................................................................................................................2 - 33

Presser foot lifter removal ................................................................................................................2 - 33

Thread release lever removal ...........................................................................................................2 - 34

Lock nut removal .............................................................................................................................2 - 34

Z pulse motor removal .....................................................................................................................2 - 34

Presser switch assembly removal ....................................................................................................2 - 34

3. Assembly .............................................................................................3 - 1

Main parts ..........................................................................................................3 - 2

Base plate rubber attachment .............................................................................................................3 - 3

Thread guide assembly attachment ....................................................................................................3 - 3

Bobbin presser attachment .................................................................................................................3 - 3

Spool pin attachment .........................................................................................................................3 - 4

Bobbin winder assembly attachment .................................................................................................3 - 5

Bobbin base assembly attachment .....................................................................................................3 - 6

Bobbin base ASSY assembly .......................................................................................................3 - 6

Plate spring attachment ......................................................................................................................3 - 6

Needle-presser unit attachment ..........................................................................................................3 - 7

Upper shaft assembly attachment ......................................................................................................3 - 8

Feed unit assembly attachment ..........................................................................................................3 - 9

Upper shaft and lower shat phase matching ......................................................................................3 - 9

Tension pulley assembly attachment ...............................................................................................3 - 10

Tension pulley ASSY assembly ................................................................................................3 - 10

Main motor assembly attachment ....................................................................................................3 - 10

Main motor assembly .................................................................................................................3 - 10

FC jack attachment ..........................................................................................................................3 - 11

Inlet assembly attachment ................................................................................................................3 - 11

Power PCB assembly attachment ....................................................................................................3 - 12

Power PCB ASSY assembly .....................................................................................................3 - 12

Main PCB assembly attachment ......................................................................................................3 - 13

Main PCB assembly ..................................................................................................................3 - 13

Upper cover thread guide attachment ..............................................................................................3 - 13

Base plate rubber attachment ...........................................................................................................3 - 14

SV keytop attachment ......................................................................................................................3 - 14

Front panel LCD attachment ............................................................................................................3 - 14

Button attachment ............................................................................................................................3 - 15

Operation PCB assembly and SSVR PCB assembly attachment ....................................................3 - 15

LED lamp attachment ......................................................................................................................3 - 16

Thread tension holder assembly and thread take-up holder B attachment ......................................3 - 16

Thread tension holder ASSY assembly .....................................................................................3 - 16

Thread take-up holder B assembly..............................................................................................3 - 17

Front cover attachment ....................................................................................................................3 - 18

Face plate A assembly attachment ...................................................................................................3 - 19

Face plate A ASSY assembly ...................................................................................................3 - 19

Needle plate B assembly attachment ...............................................................................................3 - 20

Needle plate B ASSY assembly .................................................................................................3 - 20

Base cover attachment .....................................................................................................................3 - 20

Accessory table attachment .............................................................................................................3 - 21

Feed unit ..........................................................................................................3 - 22

Lower shaft bushing attachment ......................................................................................................3 - 23

Lower shaft assembly attachment ....................................................................................................3 - 23

Timing pulley D attachment ............................................................................................................3 - 23

FPM holder assembly attachment ....................................................................................................3 - 24

FPM assembly ...........................................................................................................................3 - 24

Vertical lever attachment .................................................................................................................3 - 25

Feed adjuster assembly attachment ..................................................................................................3 - 26

Feed adjuster ASSY assembly ...................................................................................................3 - 26

Feed arm A assembly attachment ....................................................................................................3 - 27

Feed arm B ASSY assembly ......................................................................................................3 - 28

Needle plate supporter shaft B attachment ......................................................................................3 - 29

FPM gear engagement .....................................................................................................................3 - 30

Feed bar attachment .........................................................................................................................3 - 31

Shaft supporter attachment ..............................................................................................................3 - 31

Outer rotary hook attachment ..........................................................................................................3 - 32

Vertical adjuster screw assembly attachment ..................................................................................3 - 32

Feed dog attachment ........................................................................................................................3 - 32

Inner rotary hook bracket assembly attachment ..............................................................................3 - 33

Spring attachment ............................................................................................................................3 - 33

Needle plate A assembly attachment ...............................................................................................3 - 33

Needle plate A ASSY assembly ................................................................................................3 - 33

Needle-presser unit .........................................................................................3 - 34

Presser switch assembly attachment ................................................................................................3 - 35

Z pulse motor attachment ................................................................................................................3 - 35

Lock nut attachment .........................................................................................................................3 - 36

Thread release lever attachment ......................................................................................................3 - 36

Presser foot lifter attachment ...........................................................................................................3 - 37

Shaft bushing attachment .................................................................................................................3 - 37

iii

Z zigzag cam attachment .................................................................................................................3 - 38

Z zigzag lever assembly attachment ................................................................................................3 - 39

Z zigzag lever ASSY assembly .................................................................................................3 - 39

Presser bar attachment .....................................................................................................................3 - 40

Needle holder assembly attachment ...............................................................................................3 - 41

Needle holder ASSY assembly .................................................................................................3 - 42

Needle bar assembly attachment ......................................................................................................3 - 43

Needle bar ASSY assembly .......................................................................................................3 - 43

Thread take-up lever link attachment ..............................................................................................3 - 43

Thread take-up lever and needle bar crank attachment ...................................................................3 - 44

BH switch assembly attachment ......................................................................................................3 - 44

LED lamp left assembly ..................................................................................................................3 - 45

Threader hook attachment ...............................................................................................................3 - 45

4. Adjustment ..........................................................................................4 - 1

Test mode ..........................................................................................................4 - 2

Timing belt tension adjustment ..........................................................................4 - 3

Motor belt tension adjustment ............................................................................4 - 4

Upper thread tension adjustment .......................................................................4 - 5

Three point needle drop adjustment ..................................................................4 - 6

Needle drop position adjustment for needle bar unit and rotary hook unit ........4 - 7

Needle interference left/right adjustment ...........................................................4 - 8

Needle bar rise adjustment ................................................................................4 - 9

Needle bar height adjustment ..........................................................................4 - 10

Needle interference adjustment .......................................................................4 - 11

Adjust the needle thread block ........................................................................4 - 12

Presser bar height and parallel adjustment .....................................................4 - 13

Inner rotary hook (bobbin thread) tension ........................................................4 - 14

Feed forward/reverse adjustment ....................................................................4 - 15

Bobbin winder (uneven bobbin winding and bobbin winding amounts) adjustment

.....4 - 16

BH lever switch position adjustment ................................................................4 - 17

Forward and back adjustment of needle and presser. .....................................4 - 18

Feed dog forward/reverse and left/right adjustment ........................................4 - 19

Feed dog height adjustment ............................................................................4 - 20

Inner rotary hook bracket position adjustment .................................................4 - 21

5. Special Instructions of Wiring ...........................................................5 - 1

LED lamp right supply assy ...............................................................................5 - 2

Operation PCB supply assy and SSVR PCB supply assy .................................5 - 3

Operation PCB supply assy ...............................................................................5 - 4

Lead wire assy, FPM-LE ....................................................................................5 - 5

Lead wire assy, Power-LE .................................................................................5 - 6

BH switch assy ..................................................................................................5 - 7

LED lamp left supply assy .................................................................................5 - 8

Needle bar unit ..................................................................................................5 - 9

Upper side of shutter cover ..............................................................................5 - 10

FC jack supply assy .........................................................................................5 - 11

6. Failure Investigation for Electronic Parts .........................................6 - 1

Error message list ..............................................................................................6 - 2

Outline of Mechanism

Main Mechanisms .................................................... 1 - 2

Driveline ................................................................... 1 - 3

Positions of electronic components .......................... 1 - 4

Control system block diagram .................................. 1 - 5

Operation of other electronic components ............... 1 - 7

1 - 1

Outline of Mechanism Main Mechanisms

Sewing Machine

Thread guide mechanism

Needle bar /

Presser mechanism

Needle threader

mechanism

Bobbin winder mechanism

Upper shaft mechanism

Feed / Rotary hook mechanism

Side feed mechanism

1 - 2

Outline of Mechanism Driveline

A) Up and down movement of needle bar, movement of thread take-up lever and zigzag mechanism

Thread take-up

counter weight

Needle bar crank

Needle bar crank rod

Needle bar block

Needle bar

Needle

Needle bar supporter assy

Upper shaft

Thread take-up lever

Needle bar supporter

assy

Needle bar crank

Pulley

Z zigzag cam

Z pulse motor

Z zigzag lever

Needle bar

Needle

B) Movement of feed dog and rotary hook

Z zigzag lever

Z zigzag cam

Upper shaft

Thread take-up counter weight Needle bar crank rod

Needle bar block

Z pulse motor

Pulley

Outline of

Mechanism

Lower shaft

gear

Outer rotary

hook

Timing pulley D Timing belt

Lower shaft

Vertical lever

Feed adjuster

Feed arm b

assy

Vertical

adjusting screw

Vertical adjusting screw

Feed bar

Feed arm A

Outer rotary hook

Lower shaft gear

Upper shaft

pulley

F pulse motor

Feed arm A

Feed bar Feed dog

Upper shaft

Feed dog

F pulse motor

Feed arm b assy

Upper shaft Pulley

Feed module

Pulley

Upper shaft pulley

Timing belt

Timing pulley D

Lower shaft

1 - 3

Outline of Mechanism Positions of electronic components

Sewing Machine

SS-VR PCB assy

LED Lamp SR assy

Z pulse motor

LCD PCB assy

Power PC assy

Power switch/Inlet assy

BWSW-S assy

PFSW-S assy

BH change switch assy

BH switch lever

LED Lamp SL assy

NP sensor

Main PCB assy

F pulse motor

1 - 4

Outline of Mechanism Control system block diagram

CPS33 S34

ZPM

FPM

LED PCB LIGHT WHITE COLOR LED (LEFT)

PFSW

MAIN PCB

ZPM

DRIVER

FPM

DRIVER

BHSW

BWSW

CPU

SENSOR 2NPSENSOR 1SPSENSOR

EEPROM

RESET IC

FOOT CONTROLLER JACK

MAIN MOTOR

Outline of

Mechanism

FRONT COVER

OPERATION PCB BK PCB

Z KEY X2

F KEY X2

PATTERN SELECTION X4

LCD

LED PCB LIGHT WHITE COLOR LED (RIGHT)

BK SW

POWER SUPPLY PCB

SWITCHING POWER 30V / 5V CIRCUIT

MAIN MOTOR DRIVE CIRCUIT

POWER SWITCH

INLET

1 - 5

Outline of Mechanism Control system block diagram

CPS36 S37

ZPM

FPM

LED PCB LIGHT WHITE COLOR LED (LEFT)

PFSW

MAIN PCB

ZPM

DRIVER

FPM

DRIVER

BHSW

BWSW

CPU

SENSOR 2NPSENSOR 1SPSENSOR

FOOT CONTROLLER JACK

BUZZER

EEPROM

RESET IC

MAIN MOTOR

FRONT COVER

OPERATION PCB

Z KEY X2

F KEY X2

PATTERN SELECTION X4

LCD

LED PCB LIGHT WHITE COLOR LED (RIGHT)

SSVR PCB

SS SW

BK SW

NP SW

SPEED VR

POWER SUPPLY PCB

SWITCHING POWER 30V / 5V CIRCUIT

MAIN MOTOR DRIVE CIRCUIT

POWER SWITCH

INLET

1 - 6

Outline of Mechanism Operation of other electronic components

Start/Stop (SS) Switch . . . . . . . . . . . . . . . . . . . . . . Switch for starting and stopping the sewing machine. The machine

operates at a slow speed while the switch is being held down.

Reverse switch . . . . . . . . . . . . . . . . . . . . . . . This switch is for backtracking or ending a seam. If the switch is

pushed, it makes three to four stitches in that place and stops automatically. If the switch is held down, it sews at a slow speed in the reverse direction as long as the switch is held.

Raise needle switch . . . . . . . . . . . . . . . . . . . . This switch toggles the needle between the up and down positions.

Outline of

Mechanism

Operation PCB assembly

BH (buttonhole) switch . . . . . . . . . . . . . . . . This switch is for detecting the forward and rear ends of the

BH (button hole) lever switch . . . . . . . . . . . . . .

NP sensor . . . . . . . . . . . . . . . . . . . . . . . . . . . This sensor detects the drive timing for the pulse motor for

Speed sensor. . . . . . . . . . . . . . . . . . . . . . . . . This sensor detects the rotational speed of the main motor. It

Presser switch. . . . . . . . . . . . . . . . . . . . . . . . This switch detects the vertical position of the presser foot lifter.

BW (bobbin winder) switch . . . . . . . . . . . . . When the bobbin thread is wound, this switch detects whether

. . . . . . . . . . . . . . . . Input for pattern selection and other conditions necessary for sewing.

buttonhole according to the BH presser and lever.

This switch detects whether the BH lever is up or down.

zigzagging and feed, the vertical stop position for the needle. It detects the upper shaft angle of rotation using a shutter attached to the upper shaft and an optical sensor.

detects the upper shaft rotational speed using a shutter attached to the upper shaft and an optical sensor.

the bobbin is set for winding or not.

Foot control jack. . . . . . . . . . . . . . . . . . . . . . . This is the jack for plugging in the foot controller when it is used.

LED lamp SR assy., SL assy. . . . . . . . . . . . . White LED lamps for illuminating the work space.

1 - 7

1 - 8

Disassembly

Main parts........................................ 2 - 2

Feed unit........................................ 2 - 19

Needle-presser unit ....................... 2 - 27

With the CD-ROM version, click to start the movie clip.

2 - 1

Main unit

Main parts location diagram

2 - 2

Main unit

1 Accessory table removal

1. Remove the accessory table 1.

Main parts

Disassembly

2 Bottom cover removal

1. Remove the screw 1, and then remove the base cover 1.

2. Remove the screw 2, and then remove base cover A 2.

1 1

2 - 3

Main unit

Main parts

3 Needle plate B assembly removal

1. Remove the needle plate cover 1.

2. Remove the needle plate B assembly 2.

3-1 Needle plate B ASSY disassembly

1. Remove the cutter cover 2 from the needle plate B assembly 1.

2. Remove the spring plate 3 from the cutter cover 2, and then remove the NT lower thread cutter 4.

3. Remove the 2 slide button hooks 5, and then remove the slide button 6.

21 5

6543

2 - 4

Main unit

Main parts

4 Face plate assembly removal

1. Remove the screw 1, and then remove the face plate assembly 1.

Disassembly

4-1 Face plate A ASSY disassembly

1. Remove the screw 1, and then remove the cutter cover assembly 1.

2. Remove the CS retaining ring 2, and then remove the NT lower thread cutter 3.

2 - 5

Main unit

Main parts

5 Front cover removal

1. Remove screws 1 (front, 1 pc.), 2 (rear, 1 pc.), and 3 (rear, 5 pcs.), and then remove the front cover.

*Key point

• Disconnect the SSVR PCB lead wire connector 1 and the operation PCB lead wire connector 2 from the main PCB assembly 3 located near the front cover.

213

2 - 6

Main unit

Main parts

Thread tension holder assembly and thread take-up holder B removal

1. Remove the two screws 1.

2. Remove the thread guide A assembly 1.

3. Remove the screw 2.

4. Remove the thread guide B assembly 2.

6-1 Thread tension holder ASSY disassembly

1. Remove the screw 1, and then remove the notch spring 2 from the thread tension holder assembly 1.

2. Remove the thread dial shaft 3.

*Key point

• Turn the dial clockwise until it stops.

3. Remove the thread tension dial 4 and the thread tension plate assembly

4. Remove the spring 6, washer 7, tension disc washer 8, thread release plate 9, washer 7, tension disc B ;, and then tension disc A A in this order from the caulking shaft of the thread tension holder assembly 1.

5. Remove the thread tension adjusting screw B from the thread tension plate assembly 5.

221

Disassembly

2 - 7

Main unit

Main parts

6-2 Thread take-up holder B disassembly

1. Remove the screw 1.

2. Remove the thread catching spring case 2 from thread take-up holder B

3. Remove the thread take-up spring 3 from the thread catching spring case

4. Remove the thread guide wire 4 from thread take-up holder B 1.

7 LED lamp removal

1. Disconnect the LED lamp connector 2 from the operation PCB 1.

2. Remove the screw 1, and then remove the LED lamp 3.

2 - 8

1 3

Main unit

Main parts

Operation PCB assembly and SSVR PCB assembly removal

1. Remove the 2 screws 1, and then remove the operation PCB assembly 1.

2. Disconnect the LCD cable 2 from the operation PCB assembly 1.

3. Remove the 3 screws 2, and then remove the SSVR PCB assembly 3.

*Key point

• Remove the bands (2 locations) securing the cords of the

operation PCB assembly 1 and the SSVR PCB assembly 3.

9 Button removal

1. Remove the 2 selecting buttons 1.

2. Remove manual button A 2 and manual button B 3.

3. Remove the SS button 4, the backstitching button 5, and the NP button

23 1

Disassembly

10 Front panel and LCD removal

1. Remove the 2 screws 1.

2. Remove the front panel 1 and the LCD 2.

654

2 - 9

Main unit

Main parts

11 SV keytop removal

1. Remove the SV keytop 1.

*Key point

• Press the SV keytop hooks (2 locations) from the inside of the front cover to remove the SV keytop.

12 Base plate rubber removal

1. Remove the 2 base plate rubbers 1.

13 Upper cover thread guide removal

1. Remove the upper cover thread guide 1.

2 - 10

Main unit

Main parts

14 Main PCB assembly removal

1. Remove the 2 screws 1.

2. Remove the main PCB assembly 1.

14-1 Main PCB ASSY disassembly

1. Remove the screw 1.

2. Remove the main PCB plate spring 1, and then remove the main PCB 2.

Disassembly

2 - 11

Main unit

Main parts

15 Power PCB assembly removal

1. Remove screws 1 and 2 (2 pcs. /1pc.), and then remove the power PCB assembly 1.

2. Disconnect the main motor lead wire 2 and the inlet assembly connector

*Key point

• Hold the hook on the inlet assembly connector 3 and pull it

out.

1 2 2

15-1 Power PCB ASSY disassembly

1. Disconnect the power lead wire assembly connector 1.

2. Remove the screw 1, and then remove the power plate spring 2.

3. Remove the screw 2, and then remove the insulator sheet 3.

4. Remove the power PCB 4.

16 Inlet assembly removal

1. Remove the screw 1, and then remove the inlet assembly 1.

121

2 3

2 - 12

1 1

Main unit

Main parts

17 FC jack removal

1. Remove the jack nut 1, and then remove the FC jack assembly 2.

Disassembly

18 Main motor assembly removal

1. Remove the 2 screws 1, and then remove the main motor assembly 1.

2. Remove the motor belt 2 from the main motor assembly 1.

18-1 Main motor ASSY disassembly

1. Remove the motor fan 1.

2. Remove the 2 screws 1, and then remove the main motor 3 from the motor holder 2.

1 2

2 - 13

Main unit

Main parts

19 Tension pulley assembly removal

1. Remove spring .

2. Remove the 2 screws 1, and then remove the tension pulley assembly 1.

19-1 Tension pulley ASSY disassembly

1. Remove the screw 1, and then remove the tension pulley holder 2 from the tension pulley assembly 1.

S09

1 1

S09

20 Feed unit assembly removal

1. Remove the 2 screws 1, and then remove the upper shaft bearing presser

2. Remove the 2 screws 2, and then remove the feed unit assembly 2.

2 - 14

Main unit

Main parts

21 Upper shaft assembly removal

1. Remove the screw 1.

2. Remove the 4 screws 2, and then remove the 2 upper shaft bearing pressers 1.

3. Remove the upper shaft assembly 3 from the needle bar crank 2, and then remove timing belt 420-5GT-6 4 and timing belt 372-2GT-6 5.

22 Needle-presser unit removal

1. Peel the label, and then remove the screw 1.

2. Remove the 2 screws 2, and then remove the needle-presser unit 1.

1 1 2 1

23 4 5

Disassembly

23 Plate spring removal

1. Remove the adjusting screw 1.

2. Remove the 2 screws 1, and then remove the adjusting plate 2 and the plate spring 3.

213

2 - 15

Main unit

Main parts

24 Bobbin base assembly removal

1. Remove the bobbin base assembly 2 from the bobbin winder shaft 1.

24-1 Bobbin base ASSY disassembly

1. Remove the bobbin thread cutter holder 2 from the bobbin base assembly 1, and then remove the NT lower thread cutter 3.

25 Bobbin winder assembly removal

1. Remove the screw 1, and then remove the bobbin winder shaft stopper 1 and the bobbin winder spring 2.

2. Remove the 2 screws 2, and then remove the bobbin winder assembly 3.

3. Remove the rubber ring 4 from the bobbin winder pulley.

1243

2 - 16

Main unit

Main parts

26 Spool pin removal

1. Remove the spool pin spring 1 and pull out the spool pin 2.

2. Peel the spool pin stand 3.

Disassembly

27 Bobbin presser removal

1. Remove the screw 1, and then remove the bobbin presser 1.

28 Thread guide assembly removal

1. Remove the screw 1, and then remove the thread guide assembly 1.

2 - 17

Main unit

Main parts

29 Base plate rubber removal

1. Remove the screw 1, and then remove the plain washer (M 3.5) 1 and rubber cushion A 2.

2. Remove the base plate rubber 3.

2 - 18

Main unit

Feed unit location diagram

Disassembly

2 - 19

Main unit

Feed unit

1 Needle plate A assembly removal

1. Remove the 2 screws 1, and then remove the needle plate A assembly 1.

1-1 Needle plate A ASSY disassembly

1. Remove the screw 1, and then remove the F gear stopper plate 1.

2. Remove the screw 2, and then remove the stopper plate 2.

1 1

2 Spring removal

1. Remove the spring .

S10

3 Inner rotary hook bracket assembly removal

1. Remove the screw 1, and then remove the inner rotary hook bracket assembly 1.

S10

2 - 20

Main unit

Feed unit

4 Feed dog removal

1. Remove the 2 screws 1, and then remove the feed dog 1.

5 Vertical adjuster screw assembly removal

1. Remove spring .

2. Remove the M5 nut 1

3. Remove the vertical adjuster screw assembly 2.

S10

Disassembly

6 Outer rotary hook removal

1. Remove the screw 1, and then remove the outer rotary hook shaft 1, washer 6 2, outer rotary hook assembly 3, spacer 4, and washer 6 2 .

7 Shaft supporter removal

1. Remove the 2 screws 1, and then remove the shaft supporter 1 and the collar 2.

S04

2 - 21

Main unit

Feed unit

8 Feed bar removal

1. Remove the retaining ring (CS4).

2. Remove the polyester slider 1, feed bar 2, and polyester slider 1 in this order.

Start movie clip (CD-ROM version only)

9 Needle plate supporter shaft B removal

1. Remove nut 1 (M3) 1.

2. Remove needle plate supporter shaft B 2, and feed arm supporter 3.

*Key point

• Press the hook on the feed arm supporter 3 from the rear of

the feed bar to remove the supporter.

3. Remove the feed arm supporter 3 from the needle plate supporter shaft B

Retaining ring CS4

2 - 22

Main unit

Feed unit

10 Feed arm A assembly removal

1. Remove the screw 1, and then remove the set collar 1 and the thrust wafer 2 in this order.

2. Remove the screw 2, and then remove the horizontal feed shaft 3.

3. Remove the feed arm A assembly 4 and the thrust wafer 2.

Start movie clip (CD-ROM version only)

10-1 Feed arm B ASSY disassembly

1. emove the retaining ring (CSTW-3.5), and then remove the feed arm B assembly 1 and the polyester slider 2.

2. Remove the screw 1, and then remove the feed supporting plate 4 and feed supporting plate B 5 from the feed arm B 3.

Retaining ring CSTW-3.5

Disassembly

2 - 23

Main unit

Feed unit

11 Feed adjuster assembly removal

1. Remove the feed adjuster assembly 1, polyester slider 2, and spring in this order.

Start movie clip (CD-ROM version only)

11-1 Feed adjuster disassembly

1. Remove spring , and then remove the F gear 2 from the feed adjuster

S05

S06

S05

12 Vertical lever removal

1. Remove the 4 retaining rings (E3).

2. Pull out the vertical feed shaft 1, and then remove the plain washer (L4) 2, spring , vertical lever 3, and drop knob 4.

Start movie clip (CD-ROM version only)

S07

S05

S07

Retaining ring E3

2 - 24

Main unit

Feed unit

13 FPM holder assembly removal

1. Remove the screw 1, and then remove spring .

2. Remove the screw 2, and then remove the FPM holder assembly 1.

13-1 FPM disassembly

1. Remove the lead wire assembly (FPM-LE) 1.

2. Remove the 2 screws 1, and the remove the FPM 2.

3. Remove the rubber 3.

S08

211

S08

Disassembly

14 Timing pulley D removal

1. Remove the 2 screws 1, and then remove timing pulley D 1.

2. Remove the retaining ring (E6), and then pull out the lower shaft bushing

Retaining ring E6

2 - 25

Main unit

Feed unit

15 Lower shaft assembly removal

1. Remove the retaining ring (E6), and then remove the thrust washer 1.

2. Remove the lower shaft assembly 2.

*Key point

• Push down the lower shaft assembly 2 to remove it.

• Check that the gear does not contact the base plate.

3. Remove the 2 screws 1, and then remove the thrust wafer 1 and the set collar 3.

Retaining ring E6

16 Lower shaft bushing removal

1. Remove the 3 screws 1.

2. Remove bushing presser B 1 and the lower shaft bushing 2.

2 - 26

Main unit

Needle-presser unit location diagram

Disassembly

2 - 27

Main unit

Needle-presser unit

1 Threader hook assembly

1. Pull the needle thread slider 1 toward you, and then remove the threader hook assembly 2.

2 LED lamp left assembly removal

1. Remove the screw 1, and then remove the LED lamp left assembly 1.

3 BH switch assembly removal

1. Remove the screw 1, and then remove the BH switch assembly 1.

4 Thread take-up lever and needle bar crank removal

1. Remove the needle bar crank rod 1.

2. Remove the screw 1, and then remove the needle bar crank 3 from the thread take-up lever 2.

2 - 28

Main unit

Needle-presser unit

5 Thread take-up lever link removal

1. Remove the retaining ring (E5) and spring washer 1, and then remove the thread take-up lever link 3 from the shaft 2.

2. Remove the screw 1, and then pull the shaft 2 out of the base holder.

Start movie clip (CD-ROM version only)

6 Needle bar assembly removal

1. Loosen the screws 1 and 2, and then pull the needle bar 1 down and remove the needle thread block 2 and the needle bar block 3.

Start movie clip (CD-ROM version only)

1 2

Retaining ring E5

1232

Disassembly

6-1 Needle bar ASSY disassembly

1. Remove the screw 1, and then remove the needle block assy 1.

2 - 29

Main unit

Needle-presser unit

7 Needle holder assembly removal

1. Remove springs and .

2. Remove the screw 1, and then remove the shaft 1, needle holder block 2, and needle holder assembly 3.

*Key point

• Pull out the needle holder assembly from the top.

Start movie clip (CD-ROM version only)

S02 S03

S02

S03

2 - 30

Main unit

Needle-presser unit

7-1 Needle holder ASSY disassembly

1. Remove spring .

2. Remove the screw 1, and then remove the plate 1.

3. Remove the screw 2. Pull out the shaft 2, and then remove needle holder shaft A 3.

4. Remove the screw 3, and then remove the zigzag adjusting nut 4.

Start movie clip (CD-ROM version only)

S01

Disassembly

2 - 31

Main unit

Needle-presser unit

8 Presser bar removal

1. Remove the screw 1. Pull out the presser bar 1, and then remove the spring 2 and the presser bar clamp 3.

*Key point

• Remove the presser bar 1 and the presser feed holder assembly 4.

2. Remove the J foot 5 from the presser feed holder assembly 4.

3. Remove the screw 2, and then remove the presser feed holder assembly

Start movie clip (CD-ROM version only)

9 Z zigzag lever assembly removal

1. Remove the retaining ring (E4), and then remove the Z zigzag lever 1.

2. Remove the polyester slider 2.

Start movie clip (CD-ROM version only)

2154

Retaining ring E4

2 - 32

Main unit

Needle-presser unit

9-1 Z zigzag lever disassembly

1. Pull out the Z zigzag cap 2 from the Z zigzag lever 1.

10 Z zigzag camp removal

1. Remove the retaining ring (E3), and then remove the Z zigzag cam 1.

2. Remove the rubber 2.

Start movie clip (CD-ROM version only)

Retaining ring E3

Disassembly

11 Shaft bushing removal

1. Remove the 2 screws 1, and then remove the shaft bushing 1.

12 Presser foot lifter removal

1. Remove the retaining ring (E4), and then remove the presser foot lifter 1.

Retaining ring E4

2 - 33

Main unit

Needle-presser unit

13 Thread release lever removal

1. Remove the retaining ring (CS4), and then remove the thread release lever

1 and the spring 2.

14 Lock nut removal

1. Remove the lock nut 1, and then remove the screw 1.

Retaining ring CS4

15 Z pulse motor removal

1. Remove the 2 screws 1, and then remove the Z pulse motor 1.

16 Presser switch assembly removal

1. Remove the screw 1, and then remove the presser switch 1.

2 - 34

Assembly

Main parts........................................ 3 - 2

Feed unit........................................ 3 - 22

Needle-presser unit ....................... 3 - 34

With the CD-ROM version, click to start the movie clip.

3 - 1

Main unit

Main parts location diagram

3 - 2

Main unit

Main parts

1 Base plate rubber attachment

1. Attach the base plate rubber 1 to the arm bed cover.

• Attach rubber cushion A 2 and the plain washer (M3.5) 3 to the arm bed cover with the screw 1.

Taptite, Pan B

M3X12

Color; Silver

2 Thread guide assembly attachment

1. Attach the thread guide assembly 1 to the arm bed cover.

2. Temporarily tighten the screw 1.

*Key point

• Tighten the screw after performing "4 - 16 Bobbin winder (uneven bobbin winding and bobbin winding amounts) adjustment"

Torque

0.59 – 0.78 N

·m

Assembly

3 Bobbin presser attachment

1. Attach the bobbin presser 1 with the screw 1.

*Key point

• Place the bobbin presser with the smaller end facing the rear.

• Tighten the screw after performing "4 - 16 Bobbin winder (uneven bobbin winding and bobbin winding amounts) adjustment"

Giza Tite

4X12

Color; Gold

Taptite, Pan B (S/P washer)

M3X12

Color; Silver

Torque

0.88 – 1.18 N

Torque

0.39 – 0.78 N

·m

3 - 3

Main unit

Main parts

4 Spool pin attachment

1. Attach the spool pin stand 1 so that it does not protrude from the

attachment section.

2. Insert the spool pin 2 into the arm bed cover. Insert the pin from the

grooved end.

3. Attach the spool pin spring 3 to the arm bed cover.

*Key point

• Check that the spool pin 2 moves lightly.

3 - 4

Main unit

Main parts

5 Bobbin winder assembly attachment

1. Attach the rubber ring 1 to the bobbin winder pulley.

2. Insert the bobbin winder shaft 2 into the groove on the arm bed cover, and secure the shaft with the 2 screws 1.

3. Insert the BW switch lever 3 into the bobbin winder shaft stopper 4.

4. Set the bobbin winder spring 5 and then the bobbin winder shaft stopper 4 to the stopper attachment section of the arm bed cover, and secure them with the screw 2.

*Key point

• Check that the bobbin winder spindle base passes over the bobbin winder spring when the bobbin winder is switched.

• Check that the bobbin winder spring returns to the original position when the bobbin winder is switched.

Assembly

1 2

Giza Tite

5X16

Color; Gold

Torque

1.18 – 1.57 N

·m

54 6

3 - 5

Main unit

Main parts

6 Bobbin base assembly attachment

1. Attach the bobbin base assembly 1.

6-1 Bobbin base ASSY assembly

1. Attach the 2 NT lower thread cutters 2 and the bobbin thread cutter holder 3 to the bobbin base assembly 1.

7 Plate spring attachment

1. Attach the adjusting plate 1 and then the plate spring 2 from the inside of the arm bed cover with the 2 screws 1.

2. Tighten the adjusting screw 3 to the plate spring 2.

Taptite, Bind B

M4X10

Color; Gold

Torque

0.78 – 1.18 N

·m

231

3 - 6

Main unit

Main parts

8 Needle-presser unit attachment

1. Attach the needle-presser unit 1 to the arm bed cover with screws 1 and 2 (1 pc. and 2 pcs. respectively).

*Key point

• Lift the presser foot lifter 2 and insert it into the hole on the arm bed cover 3 to set the needle-presser unit 1 to the attachment position.

Start movie clip (CD-ROM version only)

Screw, Pan

M3X25

Color; Silver

Torque

0.78 – 1.18 N

Assembly

·m

Giza Tite

5X20

Color; Gold

Torque

1.18 – 1.57 N

·m

3 - 7

Main unit

Main parts

9 Upper shaft assembly attachment

1. Pass timing belt 420-5GT-6 (timing belt) 2 and timing belt 372-2GT-6 (motor belt) 3 to the upper shaft assembly 1.

2. Attach the needle bar crank 5 to the thread take-up lever crank 4.

3. Set the upper shaft bushing 6 to the arm bed cover attachment position.

4. Attach the 2 upper shaft bearing pressers 78 with the 4 screws 1.

*Key point

• Check that the bobbin base assembly is on the left side.

• Attach the left upper shaft bearing presser 7 so that the projecting part of 7 is positioned at the upper right. And attach the right upper shaft bearing presser 8 so that the projecting part of 8 is positioned at the lower shaft.

5. Apply 1 or 2 drops of OILER to the matching section of the upper shaft and the upper shaft bushing.

6. Align the D-cut face of the needle bar crank with the screw hole on the thread take-up lever crank, and tighten the screw 2.

Apply OILER to the matching section of the upper shaft and the upper shaft bushing.

1 - 2 drops XZ0206***

Giza Tite

5X16

Color; Gold

Torque

1.18 – 1.57 N

·m

7 1 8

D cut face

3 - 8

Set Screw, Socket (FT)

M5X5

Color; Black

Torque

1.18 – 1.57 N

·m

Main unit

Main parts

10 Feed unit assembly attachment

1. Fit the feed unit 1 to the arm bed cover attachment position, and secure them with the 2 screws 1.

2. Fit the lower shaft bushing 2 to the arm bed cover attachment position, set the lower shaft bearing presser 3, and secure them with the 2 screws 2.

*Key point

• Set the lower shaft bearing presser 3 so that the projecting part of 3 is positioned at upper right.

3. Apply 1 or 2 drops of OILER to the matching section of the lower shaft 4 and the lower shaft bushing 2.

Apply OILER to the matching section of the lower shaft and the lower shaft bushing.

Giza Tite

5X16

Color; Gold

1 - 2 drops XZ0206***

Torque

1.18 – 1.57 N

Assembly

·m

Giza Tite

5X16

Color; Gold

Torque

1.18 – 1.57 N

11 Upper shaft and lower shat phase matching

1. Rotate the upper shaft 1 until the trench on the upper shaft pulley 2 is at the front.

2. Turn the lower shaft 3 to the point where the mark on the outer rotary hook 4 is at the front, the larger feed cam 5 is at the rear, and the hole on the lower shaft 6 is at the top.

3. Pull the timing belt 7 and hang it over the timing pulley D 8.

Start movie clip (CD-ROM version only)

·m

3 - 9

Main unit

Main parts

12 Tension pulley assembly attachment

1. Attach the tension pulley assembly 1 to the arm bed cover with the 2 screws 1.

2. Attach spring .

*Key point

• Perform "4 - 3 Timing belt tension adjustment.

S09

12-1 Tension pulley ASSY assembly

1. Align the boss 3 on the tension pulley holder 2 with the hole on the tension pulley assembly 1, and secure the tension pulley assembly with the screw 1.

S09

19.8

Giza Tite

5X16

Color; Gold

Torque

1.18 – 1.57 N

SPRING

XC2538***

1 1

·m

S09

Screw, Pan (S/P washer)

M4X8DA

Color; Silver

Torque

1.18 – 1.57 N

13 Main motor assembly attachment

1. Hang the motor belt 2 over the main motor assembly 1.

2. Attach the main motor assembly 1 to the arm bed cover assembly with the 2 screws 1.

*Key point

• Perform "4 - 4 Motor belt tension adjustment.

Giza Tite

5X16

Color; Gold

13-1 Main motor assembly

1. Attach the main motor 2 to the motor holder 1 with the 2 screws 1.

2. Attach the motor fan 3.

Torque

0.29 – 0.49 N

·m

1 2

3 - 10

Screw, Pan (S/P washer)

M3X8DB

Color; Silver

Torque

0.59 – 0.78 N

·m

Main unit

Main parts

14 FC jack attachment

1. Insert the FC jack assembly 1 from the inside of the arm bed cover assembly.

2. Attach the jack nut 2 from the outside of the arm bed cover assembly.

*Key point

• Pass the lead wire of the FC jack assembly 1 through the

rear of the main motor.

15 Inlet assembly attachment

1. Attach the inlet assembly 1 with the screw 1.

Assembly

Taptite, Bind B

M4X10

Color; Gold

Torque

0.78 – 1.18 N

·m

1 1

3 - 11

Main unit

Main parts

16 Power PCB assembly attachment

1. Attach the power unit assembly 1 with screws 1 and 2 (1 pc. and 2 pcs. respectively).

*Key point

• Attach the power plate spring 3 to the upper screw 2.

2. Attach the main motor lead wire assembly connector 4 to the power PCB

3. Attach the inlet assembly connector 5 to the power PCB 2.

Taptite, Bind B

M4X10

Color; Gold

Torque

0.78 – 1.18 N

21243

·m

Screw, Bind

M4X8

Color; Silver

Torque

1.18 – 1.57 N

16-1 Power PCB ASSY assembly

1. Attach the power PCB 2 and the insulator sheet 3 to the insulation cover 1 with the screw 1.

2. Attach the power plate spring 1 with the screw 2.

1 2

Taptite, Bind B

M3X8

Color; Gold

Torque

0.39 – 0.78 N

·m

1 3

3 - 12

Main unit

Main parts

17 Main PCB assembly attachment

1. Insert the bobbin winder switch of the main PCB 2 into the slot on the bobbin winder stopper plate 1, and then insert the boss on the arm bed cover into the screw hole on the shutter cover 3.

2. Main PCB assembly 4 with the 2 screw 1.

*Key point

• Refer to "5 - 1 Special Instructions of Wiring" for wiring details.

Assembly

Taptite, Bind B

M4X10

Color; Gold

Torque

0.78 – 1.18 N

17-1 Main PCB assembly

1. Attach the main PCB plate spring 2 and the main PCB 3 to the shutter cover 1 with the screw 1.

Taptite, Bind B

M3X8

Color; Gold

Torque

0.39 – 0.78 N

18 Upper cover thread guide attachment

1. Attach the upper cover thread guide 1.

·m

1 3

3 - 13

Main unit

Main parts

19 Base plate rubber attachment

1. Attach the 2 base rubber plates 1.

20 SV keytop attachment

1. Attach the SV keytop 1.

21 Front panel LCD attachment

1. Attach the LCD 1 and the front panel 2 with the 2 screws 1.

*Key point

• Insert the LCD cable 3 into the hole in the upper section of

the front cover.

3 - 14

Taptite, Bind B

M3X8

Color; Gold

Torque

0.39 – 0.78 N

·m

Main unit

Main parts

22 Button attachment

1. Attach the SS button 1, the backstitching button 2, and the NP button 3.

2. Attach manual button A 4, manual button B 5, and 2 selecting buttons

123

456

45 6

Assembly

Operation PCB assembly and SSVR PCB assembly attachment

1. Attach the operation PCB assembly 1 with the 2 screws 1.

2. Attach the SSVR PCB assembly 2 with the 3 screws 2.

*Key point

• Insert the speed dial of the SSVR PCB assembly 3 into the slot on the SV keytop 4.

3. Connect the LCD cable 5 to the operation PCB assembly 1.

*Key point

• Bind the operation PCB cord and SSVR PCB cord, and secure these with two bands. <Refer to "5 - 1 Special Instructions of Wiring" for wiring details.>

321

1 2

Taptite, Bind B

M3X8

Color; Gold

Torque

0.39 – 0.78 N

·m

3 - 15

Main unit

Main parts

24 LED lamp attachment

1. Attach the LED lamp 1 with the screw 1.

2. Attach the LED lamp connector 2 to the operation PCB 3.

*Key point

• Secure the LED lamp lead wire 1 to the rib on the front cover.

• <Refer to "5 - 1 Special Instructions of Wiring" for wiring details.>

Thread tension holder assembly and thread take-up holder B attachment

1. Attach the thread tension holder assembly 1 with the 2 screws 1.

2. Attach the thread take-up holder B 2 with the screw 2.

*Key point

• Insert the wire of the thread tension holder assembly B 2 into the groove on the front cover, and then insert the boss into the hole on the front cover.

Taptite, Bind B

M3X8

Color; Gold

Torque

0.39 – 0.78 N

·m

1 1

1 2

Taptite, Bind B

M4X14

Color; Gold

Torque

0.78 – 1.18 N

25-1 Thread tension holder ASSY assembly

1. Attach tension disc A 2, tension disc B 3, washer 4, thread release plate 5, tension disc washer 6, washer 7, and spring 8 in this order to the

caulking shaft of the thread tension holder assembly 1.

2. Attach the thread tension adjusting screw ; to the thread tension plate 9.

3. Engage the ridge of the thread tension plate 9 with the groove on the thread tension dial A, insert them into the caulking shaft of the thread tension holder assembly 1, and secure them with the tension dial shaft B.

4. Attach the notch spring C to the thread tension holder assembly 1 with the screw 1.

*Key point

• Hold the notch spring with the ridge side up, and insert it into

the lower thread tension dial A. Align the round hole with the boss on thread tension holder assembly 1.

·m

221

;

3 - 16

Screw, Pan

M3X4

Color; Silver

Torque

0.78 – 1.18 N

·m

Main unit

Main parts

25-2 Thread take-up holder B assembly

1. Attach the wire 2 to thread take-up holder B assembly 1.

2. Insert the tip of the thread take-up spring 3 into the second hole from the bottom on the thread catching spring case 4, secure 9.7 to 10.7 mm from the top of the groove on thread take-up holder B assembly 1 to the ridge of the thread hanging section on the thread take-up spring, and attach the thread take-up spring to thread take-up holder B assembly 1 with the screw 1.

*Key point

• Attach the thread hanging section on the thread take-up spring to the section between the ribs of the thread catching spring case.

• Insert the 2 ribs of the thread catching spring case into the slot on thread take-up holder B 1.

Assembly

Screw, Pan (S/P washer)

M3X18DA

Color; Silver

Torque

0.59 – 0.78 N

·m

9.7-10.7mm

3 - 17

Main unit

Main parts

26 Front cover attachment

1. Connect the SSVR PCB connector 1 and the operation PCB connector 2 to the main PCB 3.

*Key point

• Pass the lead wires to the hook section of the shutter cover 4

while preventing them from lifting or disconnecting. <Refer to "5 - 1 Special Instructions of Wiring" for wiring details.>

2. Attach the front cover to the arm bed cover with screws 1 (front, 1 pc.), 2 (rear, 1 pc.), and 3 (rear, 5 pcs.).

213

Giza Tite

4X12

Color; Gold

Giza Tite

4X25

Color; Gold

Giza Tite

5X16

Color; Gold

Torque

0.88 – 1.18 N

Torque

0.88 – 1.18 N

Torque

1.18 – 1.57 N

·m

3 - 18

Main unit

Main parts

27 Face plate A assembly attachment

1. Attach the face plate A assembly 1 with the screw 1.

Assembly

Taptite, Cup P

M4X20

Color; Silver

Torque

0.78 – 1.18 N

27-1 Face plate A ASSY assembly

1. Attach the NT lower thread cutter 2 to the cutter cover 1, and then attach the CS retaining ring 3.

*Key point

• Insert the narrow edge of the NT lower thread cutter 2 into the cutter cover 1 first.

• Align the tab of the CS retaining ring with the groove on the shaft of the cutter cover 1.

2. Attach the cutter cover assembly to face plate A 4 with the screw 1.

·m

Taptite, Bind B

M3X8

Color; Gold

Torque

0.39 – 0.78 N

·m

3 - 19

Main unit

Main parts

28 Needle plate B assembly attachment

1. Attach the needle plate B assembly 1.

2. Attach the needle plate cover 2 to the needle plate B assembly 1.

28-1 Needle plate B ASSY assembly

1. Attach the slide button 1 to needle plate B 2.

2. Attach the NT lower thread cutter 3 and the spring plate 4 to the cutter cover 5.

3. Attach the cutter cover to needle plate B 2.

29 Base cover attachment

1. Attach the base cover 1 with the screw 1.

2. Attach base cover A 2 with the screw 2.

134

3 - 20

Screw, Flat B

M3X8

Color; Gold

Torque

0.39 – 0.78 N

·m

2 1

Main unit

Main parts

30 Accessory table attachment

1. Attach the accessory table 1.

Assembly

3 - 21

Main unit

Feed unit location diagram

3 - 22

Main unit

Feed unit

1 Lower shaft bushing attachment

1. Attach the lower shaft bushing 2 and bushing presser B 3 to the base plate assembly 1 with the 3 screws 1.

Taptite, Bind B

M3X6

Color; Gold

Torque

0.39 – 0.78 N

2 Lower shaft assembly attachment

1. Temporarily tighten the 2 screws 1 to the set collar 1, and attach the set collar to the lower shaft assembly 2.

*Key point

• Set the set collar with the machined surface facing out.

2. Insert the thrust washer 3 into the lower shaft assembly 2, and attach them to the lower shaft bushing 4.

3. Insert the thrust washer 5 into the lower shaft assembly 2, and attach the retaining ring (E6).

4. Push the lower shaft assembly 2 from the retaining ring side, move the set collar 1 to the lower shaft bushing 4, and then secure them with the 2 screws 1.

Start movie clip (CD-ROM version only)

·m

Assembly

Set Screw, Socket (CP)

M4X4

Color; Black

Torque

0.78 – 1.18 N

·m

3 Timing pulley D attachment

1. Insert the upper shaft bushing 2 into the lower shaft assembly 1, and attach the retaining ring (E6).

Insert the timing pulley D 3 into the lower shaft assembly 1, and secure them with the 2 screws 1.

Set Screw, Socket (CP)

M5X5

Color; Black

Torque

1.18 – 1.57 N

·m

Retaining ring E6

3 - 23

Main unit

Feed unit

4 FPM holder assembly attachment

1. Insert the FPM holder assembly 1 into the feed adjuster shaft 3 of the base plate assembly 2.

2. Insert spring between the base plate assembly 2 and the FPM holder assembly 1, and secure them with the screw 1.

*Key point

• Tighten the screw 1 until the tip of the screw protrudes 7 mm.

3. Attach the screw 2.

Start movie clip (CD-ROM version only)

S08

Bolt, Socket

M4X25

Color; Black

Screw

M3X8

Color; Black

Torque

0.59 – 0.78 N

·m

S08

SPRING

XC2537***

4-1 FPM assembly

1. Attach the rubber 2 to the caulking shaft of the FPM holder assembly 1.

2. Attach the FPM 3 with the 2 screws 1.

3. Apply 1 or 2 drops of FBK OIL RO 100 to the shaft bushing of FPM 3.

4. Attach the lead wire assembly (FPM-LE) 4.

Apply FBK OIL RO 100 to the shaft bushing of FPM.

1 - 2 drops XC8388***

3 - 24

Screw, Bind

M3X4

Color; Silver

Torque

0.78 – 1.18 N

·m

Main unit

Feed unit

5 Vertical lever attachment

1. Insert the vertical feed shaft 1 into the inside of the drop knob 2, and then insert the plain washer (L4) 3, spring , vertical lever 4, and

drop knob 5 in this order.

*Key point

• Determine which end of the vertical feed shaft 1 is closer to

the retaining ring and hold this end, and insert the shaft from the left side of the base plate assembly.

2. Attach the 2 retaining rings (E3).

3. Place the groove on the vertical feed shaft 1 inside the base plate assembly 6, and attach the retaining ring (E3).

4. Move the vertical feed shaft to the left, and attach the retaining ring (E3).

Start movie clip (CD-ROM version only)

S07

Retaining ring E3

S07

5.7

SPRING

XC2550***

Assembly

3 - 25

Main unit

Feed unit

6 Feed adjuster assembly attachment

1. Insert the polyester slider 2 into the shaft of the feed adjuster assembly 1,

and then attach spring .

*Key point

• Insert the spring from the smaller end.

2. Apply 1 or 2 drops of OILER to the shaft of the feed adjuster assembly 1.

3. Attach the feed adjuster assembly 3 to the base plate assembly.

Apply OILER to the shaft of the feed adjuster assembly.

S06

1 - 2 drops XZ0206***

S06

8.8

9.9

5.5

SPRING

XC2531***

6-1 Feed adjuster ASSY assembly

1. Attach the flat side of the F gear 1 to the shaft of the feed adjuster 2, and then attach the ends of spring to the F gear 1 and the feed adjuster

gear 2.

S05

S06

S05

3 - 26

S05

15.1

SPRING

XC2530***

Main unit

Feed unit

7 Feed arm A assembly attachment

1. Insert the feed arm A assembly 1 from the rear of the base plate assembly 2, and then insert the square shaft 4 of the feed arm B assembly 3 into

the feed adjuster 5.

2. Insert the thrust washer 7 between the feed arm A assembly 1 and the base plate assembly 6.

3. Apply a bead of EPCON AP(N) 0 to the hole on the feed arm A assembly 1 and the hole on the base plate assembly 6.

4. Insert the horizontal feed shaft 8 into the feed arm A assembly 1, and secure them with the screw 1.

*Key point

• Insert the horizontal feed shaft 8 through the feed arm A assembly 1 so that the hole on the shaft faces FPM, and align this hole with the hole on the base plate assembly 6.

5. Attach the feed supporting plate 9 and feed supporting plate B 8 to the feed arm B assembly 3 with the screw 2.

6. Insert the thrust washer 7 and the set collar 9 into the horizontal feed shaft 8, and then secure them with the screw 3.

Start movie clip (CD-ROM version only)

Apply EPCON AP(N) 0 to the hole on the feed arm A assembly and the hole on the base plate assembly.

Screw, Bind

M3X12

Color; Silver

Taptite, Bind B

M3X6

Color; Gold

Set Screw, Socket (CP)

M4X4

Color; Black

Bead

XC8387***

Torque

0.78 – 1.18 N

Torque

0.00 – 0.00 N

Torque

0.78 – 1.18 N

·m

Assembly

3 - 27

Main unit

Feed unit

7-1 Feed arm B ASSY assembly

1. Insert the polyester slider2 into the shaft of the feed arm A assembly 1.

2. Apply a bead of MOLYKOTE EM-30L to the shaft of the feed arm A assembly 1.

3. Attach the feed arm B assembly 3 to the shaft of the feed arm A assembly

1, and then attach the retaining ring (CSTW-3.5).

Apply MOLYKOTE EM-30L to the shaft of the feed arm A assembly.

Bead

XC8385***

Retaining ring CSTW-3.5

3 - 28

Main unit

Feed unit

8 Needle plate supporter shaft B attachment

1. Insert the feed arm supporter 1 into the needle plate supporter shaft B 2, and attach them to the base plate assembly 3.

2. Tighten nut 1 (M3) 4.

3. Move the feed arm supporter 1 down, and fit the hook 5 to the base plate assembly 3.

Assembly

3 - 29

Main unit

Feed unit

9 FPM gear engagement

1. Rotate the FPM gear 1 clockwise until the stopper 2 of the FPM gear 1 contacts the shaft 3 of the bushing B assembly .

2. Rotate the feed adjuster assembly 4 to the point 5 it contacts the FPM gear 1.

*Key point

• Hold the F pulse motor gear with your finger to prevent it from

rotating when the feed adjuster assembly 4 contacts the F pulse motor gear.

3. Align the feed adjuster assembly 4 with the F gear teeth 6, and engage them with the FPM gear 1.

*Key point

• Check that the mark 7 on the feed adjuster assembly 4 is aligned with the mark 8 on the FPM gear.

4. Apply a bead of EPNOC AP (N) 0 to the circumference of the F gear 6.

Start movie clip (CD-ROM version only)

Apply EPNOC AP (N) 0 to the entire circumference of the F gear.

Bead

XC8387***

4231

3 - 30

Main unit

Feed unit

10 Feed bar attachment

1. Insert the polyester slider 2 to the left shaft of the feed arm A assembly

2. Apply a bead of MOLYKOTE EM-30L to the shaft of the feed arm A

assembly 1.

3. Insert the feed bar 3 into the shaft of the feed arm A assembly 1.

4. Insert the polyester slider 2 into the left shaft of the feed arm A assembly

1, and then attach the retaining ring (CS4).

Retaining

ring CS4

ApplyMOLYKOTE EM-30L to the shaft of the feed arm A assembly.

Bead

XC8385***

11 Shaft supporter attachment

1. Insert the collar 2 between the shaft supporter 1 and the base plate assembly, and secure the shaft supporter with the 2 screws 1.

Assembly

Screw, Bind

M4X20

Color; Silver

Torque

0.78 – 1.18 N

·m

3 - 31

Main unit

Feed unit

12 Outer rotary hook attachment

1. Apply a light covering of EPNOC AP (N) 0 to the groove on the outer rotary hook shaft 1.

2. Insert the outer rotary hook shaft 1 into the the spacer 4 and outer rotary hook assembly 2 .

3. Place spacer 4 and then the washer 6 3 onto the outer rotary hook shaft

4. Attach the outer rotary hook assembly 2 to the shaft supporter 5 with the screw 1.

*Key point

• Rotate the lower shaft until the larger feed cam is at the rear and the hole on the lower shaft is at the top, and attach the outer rotary hook assembly so that the mark is at the front.

Start movie clip (CD-ROM version only)

Apply EPNOC AP (N) 0 to the groove on the outer rotary hook shaft.

Set Screw, Socket (CP)

M4X4

Color; Black

13 Vertical adjuster screw assembly attachment

1. Attach the vertical adjuster screw assembly 1.

2. Attach the M5 nut 2 to the vertical adjuster screw assembly 1.

3. Attach spring .

S04

Light covering

XC8387***

Torque

0.78 – 1.18 N

·m

S04

18.8 SPRING

XC4935***

14 Feed dog attachment

1. Temporarily tighten the 2 screws 1 to attach the feed dog 2 to the feed bar 1.

*Key point

• Tighten the screws after performing "4 - 19 Feed dog forward/ reverse and left/right adjustment"

Screw, Bind

M3X6

Color; Silver

Torque

0.78 – 1.18 N

3 - 32

·m

S04

Main unit

Feed unit

15 Inner rotary hook bracket assembly attachment

1. Align the inner rotary hook bracket 1 with the boss on the base plate assembly 2, and temporarily tighten the screw 1.

*Key point

• Tighten the screw after performing "4 - 21 Inner rotary hook bracket position adjustment."

Screw, Pan (S/P washer)

M3X6

Color; Silver

16 Spring attachment

1. Attach the spring .

S04

S10

17 Needle plate A assembly attachment

1. Attach the needle plate A assembly 1 with the 2 screws 1.

Torque

0.59 – 0.78 N

SPRING

XC6364***

·m

11 2

S10

Assembly

1 1

Screw

Color; Silver

17-1 Needle plate A ASSY assembly

1. Attach the F gear stopper plate 1 with the screw 1.

2. Attach the stopper plate 2 with the screw 2.

1 2

Screw, Bind

M2.6X3

Color; Silver

Torque

0.78 – 1.18 N

Torque

0.59 – 0.78 N

·m

3 - 33

Main unit

Needle-presser unit location diagram

3 - 34

Main unit

Needle-presser unit

1 Presser switch assembly attachment

1. Attach the presser switch assembly 1 to the base holder assembly with the screw 1.

NOTE

• Engage the ridge of the presser switch 1 with the trench of the base holder assembly 2.

Screw, Bind

M3X6

Color; Silver

Torque

0.78 – 1.18 N

2 Z pulse motor attachment

1. Attach the Z pulse motor 1 to the base holder assembly with the 2 screws

2. Apply 1 or 2 drops of FBK OIL RO 100 to the shaft bushing 2 of the Z pulse motor 1.

Apply FBK OIL RO 100 to the shaft bushing of the Z pulse motor.

1 - 2 drops XC8388***

·m

Assembly

Screw, Bind

M3X6

Color; Silver

Torque

0.78 – 1.18 N

·m

3 - 35

Main unit

Needle-presser unit

3 Lock nut attachment

1. Attach the screw 1 to the lock nut 1.

*Key point

• Screw 1 the screw in half way.

2. Attach the screw 1 to the base holder assembly.

*Key point

• Tighten the screw until the lock nut 1 contacts the base

holder assembly.

Set Screw, Socket (CP)

M4X12

Color; Black

4 Thread release lever attachment

1. Apply a bead of EPNOC AP (N) 0 to the caulking shaft 2 of the base holder assembly 1.

2. Attach the thread release lever 3 and the spring 4 to the caulking shaft 2 of the base holder assembly 1, and then attach the retaining ring (CS4).

*Key point

• Position the tip of the spring at the top, and align the spring

with the hole on the thread release lever 3.

• Secure 0.2 mm between the thread release lever 3 and the base holder 5.

Apply EPNOC AP (N) 0 to the caulking shaft of the base holder assembly.

Bead

XC8387***

3 - 36

Retaining ring CS4

Main unit

Needle-presser unit

5 Presser foot lifter attachment

1. Apply a bead of EPNOC AP (N) 0 to the presser foot lifter shaft 1 of the

base holder assembly.

2. Attach the presser foot lifter 2 to the shaft 1.

3. Attach the retaining ring (E4).

4. Apply a bead of EPNOC AP (N) 0 to the cam face 3 of the pressure foot lifter 2.

Apply EPNOC AP (N) 0 to the presser foot lifter attachment shaft of the base holder assembly.

Apply EPNOC AP (N) 0 to the cam face of the pressure foot lifter.

Bead

XC8387***

Bead

XC8387***

6 Shaft bushing attachment

1. Attach the shaft bushing 2 to the base holder assembly 1 with the 2 screws 1.

*Key point

• Tighten the 2 screws 1 in the following order: temporarily

tighten the left screw, tighten the right screw, and then tighten the left screw.

Retaining ring E4

Assembly

Screw, Bind

M3X6

Color; Silver

Torque

0.78 – 1.18 N

·m

3 - 37

Main unit

Needle-presser unit

7 Z zigzag cam attachment

1. Attach the rubber 2 to the shaft 1 of the base holder assembly.

2. Apply a bead of EPNOC AP (N) 0 to the Z zigzag cam shaft 3 of the base holder assembly.

3. Attach the Z zigzag cam 4 to the shaft 3.

*Key point

• Align the mark on the Z zigzag cam 4 with the mark on the Z pulse motor 5.

4. Attach the retaining ring (E3).

5. Apply a light covering of EPNOC AP (N) 0 to the gear of the Z zigzag cam

4 and the circumference of the cam.

Start movie clip (CD-ROM version only)

Apply EPNOC AP (N) 0 to the Z zigzag cam shaft of the base holder assembly

Apply EPNOC AP (N) 0 to the gear of the Z zigzag cam and the circumference of the cam.

Bead

XC8387***

Light covering

XC8387***

14 5

3 - 38

Main unit

Needle-presser unit

8 Z zigzag lever assembly attachment

1. Attach the polyester slider 2 to the Z zigzag lever shaft 1 of the base

holder assembly.

2. Apply a bead of EPNOC AP (N) 0 to the Z zigzag lever shaft 1 of the base

holder assembly.

3. Attach the Z zigzag lever assembly 3, and then attach the retaining ring

(E4).

*Key point

• Place the caulking shaft 4 on the left side of the Z-zigzag cam

Start movie clip (CD-ROM version only)

Apply EPNOC AP (N) 0 to the Z zigzag lever shaft of the base holder assembly.

Bead

XC8387***

2 1

Retaining ring E4

Assembly

8-1 Z zigzag lever ASSY assembly

1. Attach the Z zigzag cap 2 to the Z zigzag lever 1.

3 - 39

Main unit

Needle-presser unit

9 Presser bar attachment

1. Attach the presser feed holder assembly 2 to the presser bar 1 with the screw 1.

2. Attach the J foot 3.

3. Apply a light covering of OILER to the circumference of the presser bar 1 (upper 20 mm).

4. Insert the lower end of the presser bar 1 into the base holder 4, and then attach the presser bar 1, presser bar clamp 5, and spring 6 in this order to the base holder 4.

5. Temporarily tighten the screw 2 to the presser bar clamp 5.

*Key point

• Tighten after performing "4 - 13 Presser bar height and parallel adjustment".

• Adjust the distance from the base holder bottom face to the tip of the presser bar 1 to approximately 50 mm.

Apply OILER to the circumference of the presser bar (upper 20 mm).

Light covering

XZ0206***

Screw

3.57

Color; Silver

Set Screw, Socket (CP)

M5X8

Color; Black

Torque

1.18 – 1.57 N

Torque

Hand tighten

·m

3 - 40

Main unit

Needle-presser unit

10 Needle holder assembly attachment

1. Apply 1 or 2 drops of FBK OIL RO 100 to the circumference of needle

holder shaft A 1 of the needle holder assembly.

2. Apply 1 or 2 drops of MOLYKOTE M DISPERSIOIN to the

circumference of the needle holder assembly 2.

3. Insert the needle holder assembly between the H holder attachment section

4 of the base holder 3 and the Z zigzag lever 5, and then attach the needle holder shaft A 1 to the shaft bushing 6.

4. Insert the shaft of the needle holder assembly into the small hole on the

needle holder block 7, and then insert the shaft of the shaft assembly 8 into the hole on the needle holder block 7 and the hole on the base holder

3. Secure them with the screw 1.

5. Attach springs and .

*Key point

• Set spring with the longer hook down.

Start movie clip (CD-ROM version only)

Apply FBK OIL RO 100 to the circumference of needle holder shaft A of the needle holder assembly.

Apply MOLYKOTE M DISPERSIOIN to the circumference of the needle holder assembly.

S02 S03

S03

1 - 2 drops

XC8388***

1 -2 drops

XC8386***

163

25 4

Assembly

S02

Screw

3X10

Color; Black

14.3

A decided hook form is the same.

Torque

0.59 – 0.78 N

SPRING-Z XC2748***

·m

S02

S03

24.5 SPRING

XC2429***

S03

3 - 41

Main unit

Needle-presser unit

10-1 Needle holder ASSY assembly

1. Attach the zigzag adjusting nut 1 with the screw 1.

2. Apply OILER to the circumference at the top of the needle holder 2.

3. Pass the needle holder shaft A 3 from the end with the hole through the rear of the needle holder assembly 4, and then pass the shaft 5 through the hole on the needle holder assembly 4 and the hole on needle holder shaft A 3 so that the narrow end of the shaft is on the left side.

4. Insert the plate 6 into the groove on the shaft 5, and then attach them to the needle holder assembly 4 with the screw 2.

5. Attach the screw 3.

6. Attach spring to the plate 6 and the needle thread slider 7.

Start movie clip (CD-ROM version only)

Apply OILER to the circumference at the top of the needle holder.

S01

1 - 2 drops

XZ0206***

S01

Bolt, Socket

M3X10

Color; Black

Screw, Bind

M3X5

Color; Silver

Screw, Bind

M2X4

Color; Silver

Torque

0.78 – 1.18 N

Torque

0.78 – 1.18 N

Torque

0.29 – 0.49 N

SPRING

X50476***

·m

3 - 42

Main unit

Needle-presser unit

11 Needle bar assembly attachment

1. Insert the needle bar assembly 1 from the bottom of the needle holder assembly, and then insert the needle bar block 2 and the needle thread block 3 through the needle bar assembly and then through to the upper hole.

*Key point

• Insert the needle bar block 2 and the needle thread block 3 so that the shaft of the needle bar block 2 is on the right side and the tab of the needle thread block 3 is on the left side.

Start movie clip (CD-ROM version only)

11-1 Needle bar ASSY assembly

1. Attach the presser feed holder assembly 1 to the needle bar assembly 2 with the screw 1.

*Key point

• The screw 1 should be on the right side when the groove on the needle bar assembly 2 faces the front.

Assembly

Needle Clamp Screw

Color; Black

12 Thread take-up lever link attachment

1. Insert the shaft 1 into the base holder 2, and then align the screw 1 with the trench on the base holder 2, and tighten it temporarily.

2. Attach the thread take-up lever link 3.

3. Apply a light covering of MOLYKOTE EM-30L to the circumference of the shaft within 10 mm of the retaining ring.

4. Insert the spring washer 4 into the shaft 1.

5. Attach the retaining ring (E5) to the groove on the shaft 1.

Start movie clip (CD-ROM version only)

Apply MOLYKOTE EM-30L to the circumference of the shaft within 10 mm of the retaining ring.

Light covering

XC8385***

134

Retaining ring E5

Screw, Pan (S/P washer)

M3X8DB

Color; Silver

Torque

Hand tighten

3 - 43

Main unit

Needle-presser unit

13 Thread take-up lever and needle bar crank attachment

1. Apply a light covering of MOLYKOTE EM-30L to the thread take-up lever attachment section of the needle bar crank 1.

2. Attach the thread take-up lever 2 to the needle bar crank 1 with the screw 1.

3. Apply a light covering of MOLYKOTE EM-30L to the shaft of the thread take-up lever 3.

4. Attach the thread take-up lever assembly 4 to the thread take-up lever link 5, and then attach the needle bar crank rod 6 to the needle bar crank 1 and the needle bar block 7.

*Key point

• Move the shaft 8 to the right, and then attach the thread takeup lever assembly 4.

5. Tighten the screw 2.

6. Temporarily tighten the needle bar block 7 and the needle thread block 8 with the screw 3.

Apply MOLYKOTE EM-30L to the thread take-up lever attachment section of the needle bar crank.

Apply MOLYKOTE EM-30L to the shaft of the thread take-up lever.

Screw, Flat

SM3.57-40X7 L

Color; Black

Screw, Pan (S/P washer)

M3X8DB

Color; Silver

Set Screw, Socket (FT)

M4X4

Color; Black

Light covering

XC8385***

Light covering

XC8385***

Torque

1.18 – 1.57 N

Torque

0.59 – 0.78 N

Torque

Hand tighten

·m

14 BH switch assembly attachment

1. Attach the BH switch assembly 1 with the screw 1.

NOTE

• Align the boss 2 on the base holder with the hole on the BH switch assembly 1.

Screw, Pan (S/P washer)

M4X8DA

Color; Silver

3 - 44

Torque

1.18 – 1.57 N

·m

Main unit

Needle-presser unit

15 LED lamp left assembly

1. Attach the LED lamp L assembly 1 with the screw 1.

NOTE

• Align the boss 2 on the LED lamp L assembly 1 with the hole on the base holder 3.

Screw, Pan (S/P washer)

M4X8DA

Color; Silver

Torque

1.18 – 1.57 N

16 Threader hook attachment

1. Pull the needle thread slider 1 toward you, and then align the D-cut of the threader hook assembly 2 with the D-cut of the needle thread shaft 3.

·m

1 3

Assembly

3 - 45

3 - 46

Test Mode Test mode............................................... 4 - 2

Adjustment Timing belt tension adjustment ............... 4 - 3

Adjustment

Motor belt tension adjustment................. 4 - 4

Upper thread tension adjustment............ 4 - 5

Three point needle drop adjustment ....... 4 - 6

Needle drop position adjustment for needle bar unit and rotary hook unit Needle interference left/right adjustment 4 - 8

Needle bar rise adjustment ..................... 4 - 9

Needle bar height adjustment ............... 4 - 10

Needle interference adjustment............ 4 - 11

Adjust the needle thread block.............. 4 - 12

Presser bar height and parallel adjustment Inner rotary hook (bobbin thread) tension

Feed forward/reverse adjustment ......... 4 - 15

Bobbin winder (uneven bobbin winding and bobbin winding amounts) adjustment

BH lever switch position adjustment ..... 4 - 17

Forward and back adjustment of needle and presser. Feed dog forward/reverse and left/right adjustment

Feed dog height adjustment ................. 4 - 20

Inner rotary hook bracket position adjustment

. 4 - 13

4 - 14

4 - 16

. 4 - 18

4 - 19

. 4 - 21

4 - 7

4 - 1

Adjustment Test mode

1. Starting in test mode

• With the front cover in place press and while turning the power on; the buzzer will sound four times,

and test mode will start.

2. Mode selection

• Press and select pattern number (mode).

3. Starting and stopping test mode

• Press (If not , use foot controller)

4. Test modes (used for adjustments)

Mode

3 point needle

drop

Mode selection Screen number

Press 2 times and

select pattern number.

Press 5 times and

Feed

adjustment

select pattern number.

Z (zigzag) operations

Switches left base line / center base line / right base line with each stitch

*Pressing stops the base

line from changing.

100 stitches forward on the left base line 100 stitches reverse on the right baseline

F (feed)

operations

0 mm

(none)

Operating speed

Any speed may be selected using the speed control key

Switches low / middle / high speed with each

push of .

When the test mode will be changed the power off and the test mode will start again.

4 - 2

Adjustment

1. Loosen the pan (S/P washer) M4X8 screw on the tension pulley assembly.

2. With a force of 1.96 N (200 g) pushing on the center of the belt, adjust the tension pulley assembly position for a deflection of 4 - 5 mm.

3. Tighten the pan (S/P washer) M4X8 screw on the tension pulley assembly.

XC2277001 Push-pull gauge (3 N)

Timing belt tension adjustment

1.96N (200g)

Pan head screw (S/P washer, M4x8)

4-5mm

Tension pulley assembly

Adjustment

4 - 3

Adjustment Motor belt tension adjustment

1. Loosen the giza tite 5 x 16 (two) in the motor holder.

2. With a force of 0.98 N (100 g) pushing on the center of the belt, adjust the motor pulley position for a deflection of 3 - 4 mm.

3. Tighten the giza tite 5 x 16 (two) in the motor holder.

XC2277001 Push-pull gauge (3 N)

Motor holder

3-4mm

0.98N (100g)

GIZA TITE 5x16

4 - 4

Brother CS4000, BC2100, BC2300, RS240, RS250 Service Manual

Specifications and Main Features

Frequently Asked Questions

User Manual

Outline of Mechanism

Disassembly

Assembly

Adjustment

Adjustment Test mode

Timing belt tension adjustment

Adjustment Motor belt tension adjustment