Page 3 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 Operation of other electronic components ........1 - 6 Using the threader ................1 - 8 2.
Page 4 Main motor assembly disassembly ....................2 - 20 Thread tension unit ..................2 - 21 Thread guide assembly removal ......................2 - 22 Thread guide removal ........................2 - 22 Upper thread PCB assembly removal ....................2 - 22 Upper thread PCB ASSY disassembly ....................2 - 22 AT INIT PCB assembly removal .....................2 - 23 AT INIT PCB ASSY disassembly ....................2 - 23 Thread guide cover assembly removal ....................2 - 23...
Page 5 Needle-presser module ...................2 - 44 Presser feed holder assembly removal .....................2 - 45 Threader hook ASSY disassembly ....................2 - 45 Presser pulse motor holder assembly removal .................2 - 45 Presser pulse motor holder ASSY disassembly ................2 - 45 Presser dial removal .........................2 - 46 BHSW D6 switch assembly and LED PCB D6 assembly removal ..........2 - 46 PT holder assembly removal ......................2 - 46 PT holder ASSY disassembly ......................2 - 47...
Page 6 Feed/rotary hook module .................2 - 65 Pull link removal ..........................2 - 66 Drop indicator removal ........................2 - 66 Drop lever Q removal ........................2 - 67 Needle plate A removal ........................2 - 67 Needle plate A disassembly ......................2 - 67 Inner rotary hook bracket assembly removal ...................2 - 68 Cord holder removal ........................2 - 68 Needle plate switch ASSY removal ....................2 - 68 Photo diode holder assembly removal .....................2 - 68...
Page 7 3. Assembly .....................3 - 1 Needle-presser unit, needle threader unit, upper shaft unit .......3 - 2 Plate spring attachment ........................3 - 3 Needle-presser module attachment ....................3 - 4 Upper shaft assembly attachment ......................3 - 5 Needle-presser module and upper shaft assembly connection ............3 - 6 Upper shaft cover attachment ......................3 - 7 Rotary hook driving unit, feed/rotary hook unit, thread cutter unit, side feed unit ..3 - 8 Lower shaft A assembly attachment ....................3 - 9...
Page 8 Thread guide cover ASSY assembly ....................3 - 33 Thread guide cover assembly attachment ..................3 - 33 Power unit, motor unit ..................3 - 34 Main motor assembly attachment ....................3 - 35 Motor fan attachment ........................3 - 35 NP PCB ASSY (D6) assembly ......................3 - 35 NP PCB assembly attachment ......................3 - 36 Main PCB assembly attachment ......................3 - 36 Knee lifter assembly attachment ......................3 - 37...
Page 9 Presser plate assembly attachment ....................3 - 59 Grease application ..........................3 - 59 Thread cutter frame assembly attachment ..................3 - 60 Side feed module .....................3 - 61 S pulse motor attachment .........................3 - 62 Side feed gear attachment ........................3 - 62 Side feed adjust plate attachment .....................3 - 63 Side feed arm assembly attachment ....................3 - 63 Feed/rotary hook module .................3 - 64...
Page 10 Needle-presser module ...................3 - 93 Presser dial gear attachment ......................3 - 94 Shaft bushing attachment .........................3 - 95 Thread take-up lever link attachment ....................3 - 96 Presser bar attachment ........................3 - 97 T cam attachment ..........................3 - 98 Shaft attachment ..........................3 - 98 Z pulse motor assembly attachment ....................3 - 99 Z zigzag cam attachment .........................3 - 99 Thread release lever assembly attachment ..................3 - 100...
Page 11 Upper shaft rotation shutter angle adjustment ...........4 - 5 Three point needle drop adjustment ..............4 - 6 Needle clearance left/right adjustment ..............4 - 7 Needle bar rising adjustment ................4 - 8 Needle bar height adjustment ................4 - 9 Needle threader adjustment ................4 - 10 Clearance between needle and rotary hook point adjustment ......4 - 11 Presser bar height and parallelism adjustment ..........4 - 12 Needle and presser front/back position adjustment .........4 - 13...
Page 12 Thread tensioning does not go well ..............5 - 17 Thread cutter does not work normally .............5 - 19 Bobbin winding cannot be done ...............5 - 20 The lamp at hand does not have light ..............5 - 21 Bobbin thread detection does not work normally ..........5 - 23 Upper thread sensor does not work normally ..........5 - 24 The presser foot lifter does not work correctly ..........5 - 25 USB function cannot be used normally ............5 - 27...
Page 13 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 - 6 Using the threader............. 1 - 8 1 - 1...
Page 14 Outline of Mechanism Main Mechanisms 1 - 2...
Page 15 Outline of Mechanism Driveline A) Up and down movement of needle bar, movement of thread take-up lever and zigzag mechanism Thread take-up Unit shaft Joint Upper shaft Pulley counter weight Needle bar crank Thread take-up lever Needle bar crank rod Needle bar block Needle bar Needle bar release lever...
Page 16 Outline of Mechanism Positions of electronic components PF PULSE MOTOR ASSY:PFSW D6 ASSY:BWSW D6 ASSY:THSW PCB D6 ASSY:ATPF INIT PCB VR PCB D6 ASSY:TGSW D6 BW MOTOR ASSY Z PULSE MOTOR LCD UNIT/TOUCH PANEL AT PULSE MOTOR SS PCB D6 PCB UNIT:LED-3 PCB UNIT:LED LAMP-D6R POWER SWITCH...
Page 17 Outline of Mechanism Control system block diagram 1 - 5...
Page 18 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.
Page 19 Outline of Mechanism Needle Plate Switch ....This switch is for detecting needle plate for straight line or not. Foot control jack..... . This is the jack for plugging in the foot controller when it is used.
Page 20 Outline of Mechanism Using the threader The threader provided on this sewing machine is a device for making threading easy, but there are cases where it cannot be used because of the combination of sewing machine thread and needle type. At present, there are various types of sewing machine thread and sewing machine needles on the market for handling a variety of sewing conditions.
Page 21: Table Of Contents
Disassembly Main unit Main parts........2 - 2 Power unit, motor unit....2 - 16 Thread tension unit......2 - 21 Bobbin winder........ 2 - 30 Rotary hook driving unit, feed/rotary hook unit, thread cutter unit, side feed unit ..2 - 36 Needle-presser unit, needle threader unit, upper shaft unit..
Page 22 Main unit Main parts location diagram 2 - 2...
Page 23 Main unit Main parts Accessory table removal 1. Slide the accessory table 1 to the left, and remove it. Top cover removal 1. Turn the handle 1, and open the top cover 2. 2. Remove the top cover 2 from the hinge 3 of the main unit. Needle plate B assembly removal 1.
Page 24: Main Unit Main Parts
Main unit Main parts Needle plate B ASSY disassembly 1. Slide the slide button 1 to the right, and then remove the needle plate cover 2. Reverse the needle plate B assembly 3. Press the tab 4 on the cutter cover with your finger, and then remove the cutter cover 5.
Page 25 Main unit Main parts Face plate assembly removal 1. Remove the screws 1 and 2 (rear and side respectively), and then remove the face plate assembly 1. 2. Cut the band 2, and remove the screw 3, and then remove the face plate holder 3.
Page 26 Main unit Main parts Face plate assembly disassembly 1. Remove the needle thread lever knob 1. 2. Remove the retaining ring (CS), and then remove the NT lower thread cutter 2. 3. Remove spring 4. Remove the screw 1, and then remove the shaft presser plate 3. 5.
Page 27 Main unit Main parts Free arm cover removal 1. Remove the screw 1 on the rear of the main unit, and then remove the free arm cover 1. *Key point • Remove the hook on the free arm cover 1 from the front cover.
Page 28 Main unit Main parts Front cover removal 1. Remove the screw 12, and then remove the front cover. *Key point • Remove the hooks 1 (2 locations) from the base plate and the hook 23 from the rear cover. 2. Disconnect the lead wire connector 4, and the 2 FFC 5 from the main PCB of the front cover.
Page 29 Main unit Main parts Front cover disassembly (connector removal) 1. Cut the band 1. 2. Remove the 4 connectors 2 from the card PCB 3. Front cover disassembly (LED lamp R removal) Retaining ring CS4 1. Remove the retaining ring (CS4), and then remove LED lamp R 1. Front cover disassembly (LED lamp 3 removal) 1.
Page 30 Main unit Main parts Front cover disassembly (SS PCB assembly removal) 1. Remove the 2 screws 1, and then remove the S holder 1. 2. Remove the 2 screws 2, and then remove the SS PCB assembly 2. Front cover disassembly (button removal) 1.
Page 31 Main unit Main parts Front cover disassembly (inverter D6 assembly removal) 1. Remove the 2 screws 1, and the clip 1 from the left screw, and then remove the inverter D6 assembly 2. 2. Remove the foot controller jack assembly's ferrite core 3 from the clip 1. 3.
Page 32 Main unit Main parts Front cover disassembly (PCB holder assembly removal) 1. Remove the all connectors, FFC 3, and FFC 4. *Key point • Release the knob when removing the FFC 3. 2. Remove the 3 screws 1, and then remove the 3 board pressers and the card PCB holder 1.
Page 33 Main unit Main parts Front cover disassembly (LCD holder assembly removal) 1. Remove the 4 screws 1. 2. Remove the hooks 2 (2 locations) on the left side of the LCD holder assembly 1, and then remove the LCD holder assembly 1 from the front cover.
Page 34 Main unit Main parts Front cover disassembly (LCD assembly removal) 1. Remove the 2 screws 1, and then remove the LCD presser 1. 2. Remove the 2 screws 2, and then remove the LCD 2 and the touch panel Rear cover removal 1.
Page 35 Main unit Main parts Rear cover disassembly (plate B removal) 1. Remove the screw 1, and then remove plate B 1. Rear cover disassembly (plate A removal) 1. Remove the 2 screws 1, and then remove plate A 1 (2 locations). Handle assembly removal 1.
Page 36 Main unit Power unit, motor unit location diagram 2 - 16...
Page 37: Power Unit, Motor Unit
Main unit Power unit, motor unit Power PCB assembly removal 1. Disconnect all connectors from the main PCB 1. 2. Remove the motor cord connector 3 and the inlet cord connector 4 from the power PCB assembly (D6M) 2. 3. Remove the 3 screws 1, and then remove the power PCB assembly (D6M) 2.
Page 38 Main unit Power unit, motor unit Base plate assembly removal 1. Remove the 3 screws 1, and then remove the base plate assembly 1. Inlet assembly removal 1. Remove the screw 1, and then remove the inlet assembly 1. Knee lifter assembly removal 1.
Page 39 Main unit Power unit, motor unit Main PCB assembly removal 1. Remove the 3 screws 1, clip (right upper screw), and 2 screws 2, and then remove the main PCB assembly 1. 2. Remove the screw 3, and then remove the PCB fixed plate 2. NP PCB assembly (D6) removal 1.
Page 40 Main unit Power unit, motor unit Main motor assembly removal 1. Remove the motor fan 4. NOTE • Be careful removing the motor fan because the wings of the fan are very fragile. 2. Remove the 2 screws 1, and then remove the main motor assembly 1 and PCB holder R 2.
Page 41 Main unit Thread tension unit location diagram 2 - 21...
Page 42: Thread Tension Unit
Main unit Thread tension unit Thread guide assembly removal 1. Remove the lead wires from the hooks of the upper shaft cover 2. 2. Remove the 2 screws 1, and then remove the thread guide assembly 1. Thread guide removal 1.
Page 43 Main unit Thread tension unit AT INIT PCB assembly removal 1. Remove the screw 1, and then remove the AT INIT PCB assembly 1. AT INIT PCB ASSY disassembly 1. Remove the screw 1, and then remove the AT INIT PCB assembly 1 and the insulation sheet 2 from the AT pulse motor sensor holder 3.
Page 44 Main unit Thread tension unit Thread guide cover ASSY disassembly 1. Remove the screw 1, and then remove the thread guide 2 from the thread guide cover assembly 1. Thread guide cover removal 1. Remove the hook 1, and then remove the thread guide cover 2. Thread guide shutter link A assembly removal 1.
Page 45 Main unit Thread tension unit Thread guide shutter link A ASSY disassembly Retaining ring E3 1. Remove the retaining ring (E3), and then remove the link A shaft plate assembly 2 from the thread guide shutter link A 1. Plate assembly removal 1.
Page 46 Main unit Thread tension unit Tension release holder assembly removal 1. Remove the 2 screws 1, and then remove the tension release holder assembly 1. Tension presser plate removal 1. Remove the screw 1, and then pull out the tension presser assembly 1. 2.
Page 47 Main unit Thread tension unit Tension plate removal Retaining ring E2 1. Remove the retaining ring (E2), and then remove the spring and the tension plate 1. 2. Remove the spacer 2. Thread release link removal 1. Remove the retaining ring (E3), and then remove the thread release link 1. Retaining ring E3 2 - 27...
Page 48 Main unit Thread tension unit Thread tension gear assembly removal Retaining ring E3 1. Remove the retaining ring (E3), and then remove the thread tension gear assembly 1. 2. Loosen the tension adjusting screw 2, and then remove the tension plate assembly 3.
Page 49 Main unit Thread tension unit Thread take up spring assembly removal 1. Remove the screw 1, and then remove the thread take up spring assembly Thread take up spring ASSY disassembly 1. Remove the spring 2. Remove the thread cutting shutter 1 from the thread catching spring case Thread guide wire removal 1.
Page 50 Main unit Bobbin winder location diagram 2 - 30...
Page 51: Bobbin Winder
Main unit Bobbin winder Tension guide assembly removal 1. Remove the screw 1, and then remove the tension guide assembly 1. Bobbin base assembly removal 1. Pull up the bobbin base assembly 1 to remove it. Thread guide plate removal 1.
Page 52 Main unit Bobbin winder Sub spool stand pin removal 1. Remove the 2 screws 1, and then remove the sub spool pin holder assembly 1. 2. Remove the screw 2, and then remove the spring 2. 3. Remove the shaft 3, and then remove the sub spool stand pin 4. 2 - 32...
Page 53 Main unit Bobbin winder Spool pin removal 1. Remove the screw 1, and then remove the spool pin holder B assembly 2. Remove the spool pin 2. Bobbin winder assembly 1. Cut the band. 2. Remove the 3 screws 1, and then remove the bobbin winder assembly 1. 2 - 33...
Page 54 Main unit Bobbin winder Bobbin presser cover removal 1. Remove the screw 1. Reverse the bobbin winder assembly 1, and then remove the bobbin presser cover 2. BWSW assembly (D6) removal 1. Remove the screw 1, and then remove the BWSW assembly (D6) 1. 2.
Page 55 Main unit Bobbin winder Spring removal 1. Remove the spring Bobbin presser guide assembly removal 1. Remove the retaining ring (E3), and then remove the bobbin presser guide assembly 1 and the polyester slider 2. Retaining ring E3 Bobbin presser removal Retaining ring E3 1.
Page 56: Rotary Hook Driving Unit, Feed/Rotary Hook Unit, Thread Cutter Unit, Side Feed Unit
Main unit Rotary hook driving unit, feed/rotary hook unit, thread cutter unit, side feed unit location diagram 2 - 36...
Page 57 Rotary hook driving unit, feed/rotary hook unit, thread Main unit cutter unit, side feed unit Lead wire guide holder removal 1. Remove the screw 1, and then remove the lead wire guide holder 1. Side feed module removal 1. Remove the 2 screws 1. 2.
Page 58 Rotary hook driving unit, feed/rotary hook unit, thread Main unit cutter unit, side feed unit Thread cutter module removal 1. Remove the screws (1 and 2) on the bottom of the thread cutter module 1, and then remove the thread cutter module 1 from the feed/rotary hook module.
Page 59 Rotary hook driving unit, feed/rotary hook unit, thread Main unit cutter unit, side feed unit Feed/rotary hook module removal 1. Rotate the pulley (upper shaft) until the base line of the pulley comes to the top (needle bar is at the top point). 2.
Page 60 Main unit Needle-presser unit, needle threader unit, upper shaft unit location diagram 2 - 40...
Page 61: Needle-Presser Unit, Needle Threader Unit, Upper Shaft Unit
Main unit Needle-presser unit, needle threader unit, upper shaft unit Upper shaft cover removal 1. Remove the screw 1, and then remove the upper shaft cover 1. Tension pulley assembly removal 1. Remove the screw 1, and then remove the tension pulley assembly 1. 2 - 41...
Page 62 Main unit Needle-presser unit, needle threader unit, upper shaft unit Upper shaft assembly removal 1. Remove the 2 screws 1. Rotate the upper shaft half a turn and remove the 2 screws 2. 2. Remove the screw 3, and then remove the bushing presser 1. 3.
Page 63 Main unit Needle-presser unit, needle threader unit, upper shaft unit Needle-presser module removal 1. Remove the screw 1 on the rear of the module. 2. Remove the 2 screws 2, and then remove the presser plate B 1, adjust plate A 2. 3.
Page 64 Modules Needle-presser module location diagram 2 - 44...
Page 65: Modules Needle-Presser Module
Modules Needle-presser module Presser feed holder assembly removal 1. Press the black button on the rear of the presser feed holder assembly 1 to remove the presser foot 2. 2. Loosen the screw 1, and then pull out the presser feed holder assembly Threader hook ASSY disassembly 1.
Page 66 Modules Needle-presser module Presser dial removal 1. Remove the spring washer 1, 2 plain washers 2, and retaining ring (E4), and then remove the presser dial 3. Retaining ring E4 BHSW D6 switch assembly and LED PCB D6 assembly removal 1.
Page 67 Modules Needle-presser module PT holder ASSY disassembly 1. Remove the screw 1, and then remove the PT lever 1 and spring 2. 2. Remove the nut 3, and then remove the plain washer (M6) 4. 3. Remove the cloth thickness sensor assembly 5 from the PT holder 6. Lock nut removal 1.
Page 68 Modules Needle-presser module Spring-Z removal 1. Remove the spring Needle holder shaft block removal 1. Remove the screw 1 at the lower section of the unit holder, and then remove the needle holder shaft block 1, needle holder block 2, and thread guide plate 3.
Page 69 Modules Needle-presser module Needle holder assembly removal 1. Remove the screw 1, and then remove the plate 1. 2. Remove the screw 2, and then press the left end of the shaft 2 to remove the shaft from the right end. 3.
Page 70 Modules Needle-presser module Hook release plate removal 1. Remove the screw 1 on the rear of the needle holder assembly, and then remove the hook release plate 1. Release adjuster removal 1. Remove the 2 screws 1, and then remove the release adjuster 1. Release guide plate removal 1.
Page 71 Modules Needle-presser module Release lever assembly removal 1. Remove the screw 1, and then remove the release lever assembly 1. Release lever ASSY disassembly Retaining ring E2.5 1. Remove the release lever 2 from the release lever shaft 1. 2. Remove the thrust wafer 3 and the retaining ring (E2.5) from the release lever shaft 1.
Page 72 Modules Needle-presser module Thread lever switch unit removal 1. Remove the screw 1, and then remove the thread lever switch unit 1. 2. Remove the screw 2, and then remove the presser switch holder 2 and the thread lever switch assembly 3. Lever AB unit removal Retaining ring E2 1.
Page 73 Modules Needle-presser module Lever AB ASSY disassembly 1. Remove the retaining ring (E3), and then remove the lever B 2 and the spring from the lever A assembly 1. 2. Remove the cap 3 from the lever B 2. Retaining ring E3 Shaft bushing A removal 1.
Page 74 Modules Needle-presser module Adjusting plate assembly removal 1. Remove the 2 screws 1, and then remove the adjusting plate assembly 1. 2. Remove the spring Adjusting plate ASSY disassembly Retaining ring E3 1. Remove the retaining ring (E3), and then remove the switch lever 1 and spring 2.
Page 75 Modules Needle-presser module Release plate assembly removal 1. Remove the retaining ring (E2), and then remove the release plate assembly 1. Retaining ring E2 2 - 55...
Page 76 Modules Needle-presser module Press foot lifter removal Retaining ring E4 1. Remove the retaining ring (E4), and then remove the presser foot lifter 1 and 2 washers 2. 2. Pull out the presser lift shaft 3 from the rear of the presser module, and then remove the retaining ring (E4).
Page 77 Modules Needle-presser module Thread take-up lever assembly removal 1. Remove the screw 1, and then remove the thread take-up lever assembly *Key point • The screw 1 has a reverse helical flute thread. 2. Remove the 2 screws 2, and then remove the needle bar crank 2 and the needle bar crank rod 3.
Page 78 Modules Needle-presser module Z zigzag lever assembly removal 1. Remove the retaining ring (E3) on the rear of the Z zigzag lever assembly 1, and then remove the zigzag lever assembly 1. 2. Remove the Z lever cap 2 from the Z zigzag lever 1. *Key point •...
Page 79 Modules Needle-presser module Z zigzag cam removal Retaining ring E2 1. Remove the retaining ring (E2), and then remove the Z zigzag cam 1. Z pulse motor assembly removal 1. Remove the screw 1, and then remove the Z pulse motor assembly 1. *Key point •...
Page 80 Modules Needle-presser module Presser bar removal Retaining ring E5 1. Remove the retaining ring (E5) from the presser bar. 2. Remove the screw 1 from the presser bar clamp assembly 1, and then pull the presser bar downward. 3. Remove the presser bar clamp assembly 1 and the spring 4.
Page 81 Modules Needle-presser module Thread take-up lever link removal 1. Remove the screw 1. 2. Remove the retaining ring (E4). *Key point to the thread take-up lever link 2. • Move the spring 3. Pull out the shaft 1, and then remove the spring and the thread take- up lever link 2.
Page 82 Modules Drop module location diagram 2 - 62...
Page 83: Drop Module
Modules Drop module Spring removal 1. Remove the spring Driven gear removal Retaining ring E3 1. Remove the retaining ring E3, and then remove the driven gear 1. Push link assembly removal Retaining ring E2 1. Remove the retaining ring E2. 2.
Page 84 Modules Drop module D pulse motor removal 1. Remove the 2 screws 1, and then remove the D pulse motor 1. 2 - 64...
Page 85 Modules Feed/rotary hook module location diagram 2 - 65...
Page 86: Feed/Rotary Hook Module
Modules Feed/rotary hook module Pull link removal 1. Remove the pull link 1. *Key point • Turn the pull link 1 to the bottom. Drop indicator removal Retaining ring E3 1. Remove the spring 2. Remove the retaining ring (E3), and then remove the drop indicator 1. *Key point •...
Page 87 Modules Feed/rotary hook module Drop lever Q removal 1. Remove the retaining ring (E2) on 2 slide shafts A 1 from the rear of the drop lever Q 2. 2. Remove 2 slide shafts A 1 from the front of the drop lever Q 2, and then remove the other retaining ring (E2) on 2 slide shafts A 1.
Page 88 Modules Feed/rotary hook module Inner rotary hook bracket assembly removal 1. Remove the screw 1, and then remove the inner rotary hook bracket assembly 1. Cord holder removal 1. Remove the screw 1, and then remove the cord holder 1. Needle plate switch ASSY removal 1.
Page 89 Modules Feed/rotary hook module Photo diode holder ASSY disassembly 1. Remove the photo diode holder assembly 1 from the photodiode holder *Key point • Disengage the 2 hooks on the photo diode holder 2. Feed dog removal 1. Remove the 2 screws 1, and then remove the feed dog 1. 2 - 69...
Page 90 Modules Feed/rotary hook module Outer rotary hook removal 1. Remove the screw 1, and then remove the outer rotary hook shaft 1. *Key point • Press the bottom of the outer rotary hook shaft 1, and then pull the outer rotary hook shaft 1 out from the outer rotary hook assembly 3.
Page 91 Modules Feed/rotary hook module Spring removal 1. Remove the spring Feed bar assembly removal 1. Remove the 2 screws 1, and then pull out the 2 feed bar shafts A 1. 2. Remove the feed bar assembly 2. Feed dog base assembly removal 1.
Page 92 Modules Feed/rotary hook module Feed dog correction plate removal 1. Remove the screw 1, and then remove the feed dog correction plate 1. Vertical adjusting screw removal 1. Remove the screw 1, and then remove the M5 nut 1. 2. Remove the cap 2 from the bottom of the screw 1. Vertical rod removal 1.
Page 93 Modules Feed/rotary hook module Vertical feed bush removal 1. Remove the 2 screws 1, and then remove the vertical feed bush 1. Spring removal 1. Remove the spring F gear stopper plate removal 1. Remove the screw 1, and then remove the F gear stopper plate 1. *Key point •...
Page 94 Modules Feed/rotary hook module F pulse motor holder assembly removal 1. Remove the screws 12, and then remove the spring and the F pulse motor assembly 1. F pulse motor holder ASSY disassembly 1. Disconnect the F pulse motor lead wire assembly 2 from the pulse motor (M35SP-8N) 1.
Page 95 Modules Feed/rotary hook module Shaft stopper plate removal 1. Remove the screw 1, and then remove the shaft stopper plate 1. Set screw collar removal 1. Remove the screw 1, and then remove the set screw collar 1. Feed arm assembly removal Retaining ring E5 1.
Page 96 Modules Feed/rotary hook module Feed arm ASSY disassembly Retaining ring E3 1. Remove the retaining ring (E3), and then remove the polyester slider 2 and the feed arm B assembly 3 from feed arm A 1. 2. Remove the retaining ring (E2), and then remove the feed supporting plate 5 from feed arm B 4.
Page 97 Modules Feed/rotary hook module Lower shaft B ASSY disassembly 1. Remove the retaining ring (E6), and then remove the 2 screw 1 of the set screw collar 1. 2. Remove the thrust washer 3, lower shaft bushing 4, thrust washer 3, and set screw collar 1 from the lower shaft B assembly 2.
Page 98 Modules Feed/rotary hook module Drop assembly removal 1. Remove the 2 screws 1, and then remove the drop assembly 1 from the bottom. Drop ASSY disassembly Retaining ring E3 1. Remove the screw 1 to free the set screw collar 1. 2.
Page 99 Modules Feed/rotary hook module Feed adjuster assembly removal 1. Remove the 2 screws 1, and then remove the bushing supporter assembly 1, feed adjuster assembly 2, and spring Feed adjuster ASSY disassembly 1. Remove the polyester slider 2 from the adjusting shaft 1. 2.
Page 100 Modules Side feed module location diagram 2 - 80...
Page 101: Side Feed Module
Modules Side feed module Side feed arm assembly removal 1. Remove the screw 1, and then remove the plate spring A 1 and the side feed arm assembly 2. Side feed adjust plate removal 1. Remove the screw 1, and then remove the plate spring B 1, washer 2, and side feed adjust plate 3.
Page 102 Modules Side feed module Side feed gear removal 1. Remove the rubber 1. 2. Remove the screw 1, and then remove the S stopper 2. 3. Slide the S gear 3 to disengage it from the S pulse motor gear 4. 4.
Page 103 Modules Thread cutter module location diagram 2 - 83...
Page 104: Thread Cutter Module
Modules Thread cutter module Thread cutter frame assembly removal 1. Cut the band. 2. Remove the 2 screws 1, then remove the thread cutter frame assembly 1 from the motor holder assembly 2, and then remove the 2 collars. Presser plate assembly removal 1.
Page 105 Modules Thread cutter module Thread hook ASSY disassembly Retaining ring E4 1. Remove the retaining ring (E4), and then remove the washer 1 and the polyester slider 2. 2. Reverse the thread cutter frame 3, and then remove the thread hook assembly 4 and the spacer 5.
Page 106 Modules Thread cutter module Thread cutter lever assembly removal 1. Slide the thread cutter lever assembly 1 to remove it from the idle gear 2, and then remove it from the thread cutter lever shaft 3. Thread cutter lever ASSY disassembly 1.
Page 107 Modules Thread cutter module Idle gears A and B removal Retaining ring E2 1. Remove the retaining ring (E2), and then remove idle gear A 1, spring 2, and idle gear B 3. Z pulse motor assembly removal 1. Disconnect the lead wire connector 2 from the PCB of the Z pulse motor assembly 1.
Page 108 2 - 88...
Page 109 Assembly Main unit Needle-presser unit, needle threader unit, upper shaft unit..3 - 2 Rotary hook driving unit, feed/rotary hook unit, thread cutter unit, side feed unit ..3 - 8 Bobbin winder unit ......3 - 14 Thread tension unit......3 - 22 Power unit, motor unit....
Page 110 Main unit Needle-presser unit, needle threader unit, upper shaft unit location diagram 3 - 2...
Page 111 Main unit Needle-presser unit, needle threader unit, upper shaft unit Plate spring attachment 1. Attach the plate spring 1 to the arm bed with the 2 screws 1. Torque Screw, Bind · M4X5 1.18 – 1.57 N 3 - 3...
Page 112 Main unit Needle-presser unit, needle threader unit, upper shaft unit Needle-presser module attachment Retaining ring E5 1. Attach the retaining ring (E5) to the shaft 1. 2. Insert the shaft 1 into the shaft hole on the needle-presser module (left side).
Page 113 Main unit Needle-presser unit, needle threader unit, upper shaft unit Upper shaft assembly attachment 1. Apply 1 or 2 drops of FBK OIL RO 100 to the upper shaft bushing attachment section 1, and then move the upper shaft bushing 2 to the lubricated section.
Page 114 Main unit Needle-presser unit, needle threader unit, upper shaft unit Needle-presser module and upper shaft assembly connection 1. Face the shaft D-cut 1 of the needle-presser module and the upper shaft D-cut 2 to the front. 2. Slide the fixed joint 3 to the left, and then insert it into the shaft 1 of the needle-presser module.
Page 115: Main Unit Needle-Presser Unit, Needle
Main unit Needle-presser unit, needle threader unit, upper shaft unit Upper shaft cover attachment 1. Attach the upper shaft cover 1 to the arm bed with the screw 1. Torque Screw, Bind · M4X6 0.79 – 1.18 N 3 - 7...
Page 116: Rotary Hook Driving Unit, Feed/Rotary Hook Unit, Thread Cutter Unit, Side Feed Unit
Main unit Rotary hook driving unit, feed/rotary hook unit, thread cutter unit, side feed unit location diagram 3 - 8...
Page 117 Rotary hook driving unit, feed/rotary hook unit, thread Main unit cutter unit, side feed unit Lower shaft A assembly attachment 1. Rotate the pulley (upper shaft) 1 until the base line 2 of the pulley comes to the top. 2. Apply 1 or 2 drops of FBK OIL RO 100 to the lower shaft bushing attachment sections 3 (2 locations), and then move the lower shaft bushing 4 to the lubricated section.
Page 118 Rotary hook driving unit, feed/rotary hook unit, thread Main unit cutter unit, side feed unit Tension pulley assembly attachment 1. Temporarily secure the tension pulley assembly 1 to the arm bed with the screw 1. Adjust the timing belt tension, and then fully tighten the screw 1. *Key point •...
Page 119 Rotary hook driving unit, feed/rotary hook unit, thread Main unit cutter unit, side feed unit Feed/rotary hook module attachment 1. Insert the Joint 1 of the feed/rotary hook module until the D-cut of lower shaft B 2. 2. Apply a bead of EPNOC AP(N) 0 to the slit 3 on both joints of lower shaft A 7 and lower shaft B 2.
Page 120 Rotary hook driving unit, feed/rotary hook unit, thread Main unit cutter unit, side feed unit Drop unit attachment 1. Attach the drop unit 1 to the arm bed with the 2 screws 1. *Key point • Insert the hole on the pull link 2 on the tip of reversal link 3. Thread cutter module attachment 1.
Page 121 Rotary hook driving unit, feed/rotary hook unit, thread Main unit cutter unit, side feed unit Side feed module removal attachment 1. Attach the side feed module 1 to the arm bed with the 2 screws 1 (CS-6 clip is secured to both screws). *Key point •...
Page 122 Main unit Bobbin winder unit location diagram 3 - 14...
Page 123: Bobbin Winder Unit
Main unit Bobbin winder unit BW motor assembly attachment 1. Attach the BW motor assembly 1 to the bobbin winder holder assembly 2 with the 2 screws 1. Torque Screw, Bind · M3X3 0.79 – 1.18 N Bobbin presser attachment Retaining ring E3 1.
Page 124 Main unit Bobbin winder unit Spring attachment 1. Reverse the bobbin winder assembly 1. 2. Attach the spring to the shaft groove 2 of the bobbin presser guide assembly and the notch 3 of the bobbin winder holder assembly. *Key point •...
Page 125 Main unit Bobbin winder unit Bobbin presser cover attachment 1. Attach the bobbin presser cover 1 to the bobbin winder holder assembly 2 with the screw 1. *Key point • Engage the positioning tab on the bobbin presser cover with the positioning hole on the bobbin winder holder assembly.
Page 126 Main unit Bobbin winder unit Spool pin attachment 1. Place the shaft hole on the spool pin 1 on the rear of the upper cover. 2. Insert the shaft of spool pin holder assembly B 2 into the hole on the spool pin 1.
Page 127 Main unit Bobbin winder unit Sub spool stand pin attachment 1. Attach the plate spring 1 to the sub spool pin holder 2 with the screw 1. *Key point • Engage the positioning tab on the sub spool pin holder 2 with the positioning hole on the plate spring 1.
Page 128 Main unit Bobbin winder unit Thread guard plate attachment 1. Insert the thread guard plate 1 into the groove on the side face of the upper cover. 2. Attach the thread guard plate 1 with the screw 1. *Key point •...
Page 129 Main unit Bobbin winder unit Bobbin base assembly attachment 1. Place the bobbin base assembly 1 onto the bobbin winder shaft assembly 2, and push it until you hear a click. *Key point • Engage the tab on the bobbin winder shaft assembly 2 with the notch on the bobbin base assembly 1.
Page 130 Main unit Thread tension unit location diagram 3 - 22...
Page 131: Thread Tension Unit
Main unit Thread tension unit Spring tape attachment 1. Attach the spring tape 1 along the R-section of the thread guard. *Key point • Do not allow the spring tape 1 to protrude from the thread guard. Thread guide wire attachment 1.
Page 132 Main unit Thread tension unit Thread take up spring ASSY assembly 1. Apply a light covering of silicon grease to the outer and inner peripheries of the spring 2. Insert the thread cutting shutter 2 into the thread catching spring case 1. 3.
Page 133 Main unit Thread tension unit Thread tension gear assembly attachment 1. Place the tension disk A 2 and the tension disk B 3 onto the thread tension disk shaft 1 of the thread guard. 2. Place the plain washer (S3) 5 and the spring onto the calking pin 4 of the thread guard, and then attach the retaining ring (E2).
Page 134 Main unit Thread tension unit Thread release link attachment 1. Insert the thread release link 1 into the pin of the tension release holder 2, and attach the retaining pin (E3). Retaining ring E3 Tension plate attachment 1. Place the spacer 1 on the tension release holder assembly 2. *Key point •...
Page 135 Main unit Thread tension unit Tension presser plate assembly attachment 1. Attach the screw 1 to the tension presser plate assembly 1. *Key point • Tighten the screw 1 until it protrudes from the bottom of the tension presser plate assembly 1 0.2 - 0.5 mm. 2.
Page 136 Main unit Thread tension unit Tension release holder assembly attachment 1. Attach the tension release holder assembly 1 to the thread guard assembly 2 with the 2 screws 1. *Key point • The tension release plate A 3 and the presser SW link 4 should be positioned as shown in the illustration on the right when the tension release holder assembly 1 is attached.
Page 137 Main unit Thread tension unit AT pulse motor assembly attachment 1. Apply 1 or 2 drops of FBK OIL RO 100 to the shaft of the AT pulse motor assembly 1. 2. Insert the AT pulse motor lead wire assembly 3 to the connector of the AT pulse motor assembly 2.
Page 138 Main unit Thread tension unit Plate assembly attachment 1. Attach the plate assembly 1 with the screw 1. Torque Screw, Bind · M3X4 0.78 – 1.18 N AT INIT PCB ASSY assembly 1. Attach the insulation sheet 1 and the AT INIT PCB assembly 2 to the AT pulse motor sensor holder 3 with the screw 1.
Page 139 Main unit Thread tension unit AT INIT PCB assembly attachment 1. Attach the AT INIT PCB assembly 1 to the thread guard assembly with the screw 1. *Key point • Engage the positioning tab on the thread guard with the positioning hole on the AT INIT PCB assembly 1.
Page 140 Main unit Thread tension unit Upper thread PCB assembly attachment 1. Attach the upper thread PCB assembly 1 to the thread guard assembly with the screw 1. *Key point • Engage the positioning tab on the thread guard assembly with the positioning hole on the upper thread PCB assembly 1.
Page 141 Main unit Thread tension unit Thread guide cover attachment 1. Attach the thread guide cover 1 to the thread tension unit. *Key point • Engage the 2 lugs (2, 3) on the thread tension unit in the 2 grooves (4, 5) on the thread guide cover 1, and then attach the thread guide cover behind the boss 6.
Page 142 Main unit Power unit, motor unit location diagram 3 - 34...
Page 143: Power Unit, Motor Unit
Main unit Power unit, motor unit Main motor assembly attachment 1. Hang the timing belt over the timing pulley 1 of the upper shaft and the pulley 2 of the motor. 2. Set the main motor assembly 3 onto the arm bed, and then tighten the upper screw 1 temporarily.
Page 144 Main unit Power unit, motor unit NP PCB assembly attachment 1. Attach the NP PCB assembly (D6) 1 to the arm bed with the 3 screws 1. NOTE • Attach the NP PCB assembly (D6) 1 carefully to avoid damaging the sensor on the rear of the assembly. •...
Page 145 Main unit Power unit, motor unit Knee lifter assembly attachment 1. Attach the knee lifter assembly 1 to the base plate 2with the 2 screws 1. Torque Screw, Bind · M4X6 0.79 – 1.18 N Inlet assembly attachment 1. Attach the inlet assembly 1 to the base plate 2 with the screw 1. *Key point •...
Page 146 Main unit Power unit, motor unit Ferrite core attachment 1. Attach the ferrite core 1 to the power PCB assembly (D6M). Power switch assembly (D6) attachment 1. Attach the power switch assembly (D6) 1 and the insulator sheet (S) 2 to the power unit cover 3.
Page 147 Main unit Main parts location diagram 3 - 39...
Page 148: Main Parts
Main unit Main parts Handle assembly Retaining ring E4 1. Attach the handle holder R assembly 1 to the inside of the handle 2, and then attach the retaining ring (E4). 2. Attach the handle holder L assembly 3 to the outside of the handle 2, and then attach the retaining ring (E4).
Page 149 Main unit Main parts Rear cover attachment 1. Attach the rear cover 1 to the arm bed with the 3 screws 1. *Key point • Attach the 2 hooks 2 on the rear cover to the base plate. • Engage the positioning tab on the rear cover 3 with the positioning hole on the rear of the arm bed.
Page 150 Main unit Main parts Front cover assembly (SV keytop attachment) 1. Attach the SV joint plate 1 to the rear of the front cover. 2. Attach the SV keytop 2 to the hole on the SV joint plate 1 from outside the front cover.
Page 151 Main unit Main parts Front cover assembly (foot controller jack assembly attachment) 1. Attach the foot controller jack assembly 1 to the rear of the front cover. *Key point • Position the mark on the foot controller jack assembly 1 face 2.
Page 152 Main unit Main parts Front cover assembly (inverter D6 assembly attachment) 1. Attach the inverter D6 1 to the inverter cover 2 with the 2 screws 1. 2. Connect the inverter lead wire assembly's connector 3 to the left side of the inverter D6 1.
Page 153 Main unit Main parts Front cover assembly (button attachment) 1. Attach the SS button 1, and the operation button 2, to the rear of the front cover. Front cover assembly (SS PCB assembly attachment) 1. Attach the SS PCB assembly 1 to the SS button on the rear of the front cover with the 2 screws 1.
Page 154 Main unit Main parts Front cover assembly (VR PCB assembly attachment) 1. Align the screw hole on plate C 1 with that on the VR PCB 2. 2. Attach the VR PCB assembly to the inside of the front cover with the 2 screws 1.
Page 155 Main unit Main parts Front cover assembly (panel PCB connector attachment) 1. Connect the connectors to the card PCB 1. *Key point • Refer to "Wiring procedures". 2. Tie the lead wires with a band 2. 3 - 47...
Page 156 Main unit Main parts Front cover attachment 1. Connect the two FFC cords 1 of the card PCB to the connector on the main PCB 2, and lock them with the connector tabs on both ends. *Key point • Check that the tabs on the connector on the main PCB 2 are released before connecting the FFC cords 1.
Page 157 Main unit Main parts Bobbin winder attachment 1. Connect the 2 lead wire connectors 2 of the bobbin winder 1to the main PCB. 2. Attach the bobbin winder 1 with the 5 screws 1 and 1 screw 2. *Key point •...
Page 158 Main unit Main parts Front thread guide cover attachment 1. Attach the front thread guide cover 1 to the thread guard with the screw *Key point • Engage the thread guide of the thread guard with the groove on the right side of the front thread guide cover. Torque Screw, Pan (S/P washer) ·...
Page 159 Main unit Main parts Face plate assembly attachment 1. Attach the face plate holder 1 to the arm bed with the screw 1. 2. Tie the lead wires with a band. 3. Attach the face plate assembly 2 with the screws 2 and 3. *Key point •...
Page 160 Main unit Main parts Needle plate B ASSY assemblyNeedle plate B ASSY assembly 1. Attach the slide button 1 to needle plate B 2. 2. Attach the NT lower thread cutter 3 to the cutter cover 4. 3. Insert the plate spring 5, and secure the NT lower thread cutter 3. 4.
Page 161 Main unit Main parts Accessory table attachment 1. Slide the accessory table 1 to the right to attach it. 3 - 53...
Page 162 Module Thread cutter module location diagram 3 - 54...
Page 163: Module Thread Cutter Module
Module Thread cutter module Z pulse motor assembly attachment 1. Attach the Z pulse motor assembly 1 to the motor holder assembly 2 with the 2 screws 1. *Key point • Attach the Z pulse motor assembly 1 so that the PCB is at the upper right section.
Page 164 Module Thread cutter module Idle gears A and B attachment 1. Apply a small amount of EPNOC AP (N)0 to the idle gear shaft 1. 2. Attach the idle gear A 2, spring 3 and idle gear B 4 to the idle gear shaft 1, and attach retaining ring E2.
Page 165 Module Thread cutter module Photo transistor assembly attachment 1. Attach the photo transistor assembly 1 to the motor holder assembly 2 with the screw 1. *Key point • Pass the lead wire through the groove 3 on the sensor holder below the photo transistor assembly 1.
Page 166 Module Thread cutter module Rubber attachment 1. Place the rubber 1 onto the shaft 3 on the rear of the thread cutter frame 2, and then attach the retaining ring (E3). Retaining ring E3 Thread hook ASSY assembly 1. Attach the spacer 1 to the thread cutter frame 2. *Key point •...
Page 167 Module Thread cutter module Presser plate assembly attachment 1. Attach the presser plate 1 and the plate spring 2 to the thread cutter frame 3 with the screw 1. *Key point • Engage the positioning tab on the thread cutter frame 3 with the positioning hole on the presser plate 1 and the plate spring 2.
Page 168 Module Thread cutter module Thread cutter frame assembly attachment 1. Insert the 2 collars 3 between the thread cutter frame assembly 1 and the motor holder assembly 2. *Key point • Insert the collars 3 into the screw holes. 2. Attach the thread cutter frame assembly 1 to the motor holder assembly 2 with the 2 screws 1.
Page 169 Module Side feed module location diagram 3 - 61...
Page 170: Side Feed Module
Module Side feed module S pulse motor attachment 1. Attach the S pulse motor assembly 1 to the S pulse motor holder 2 with the 2 screws 1. *Key point • Position the S pulse motor assembly 1 so that the PCB is at the upper right section.
Page 171 Module Side feed module Side feed adjust plate attachment 1. Apply a bead of MOLYKOTE EM30L to the shaft hole on the edge of the side feed adjust plate 1. 2. Attach the plate spring B 2 and then the washer 3 to the screw 1. 3.
Page 172 Module Feed/rotary hook module location diagram 3 - 64...
Page 173: Feed/Rotary Hook Module
Module Feed/rotary hook module Bushing presser B attachment 1. Attach the lower shaft bushing 1 to the bushing supporter assembly 2. 2. Apply 1 or 2 drops of FBK OIL RO 100 to the sphere of the lower shaft bushing 1. 3.
Page 174 Module Feed/rotary hook module Feed adjuster assembly attachment 1. Place the spring onto the shaft of the feed adjuster 1. *Key point • Place the spring from the end with the smaller diameter. 2. Apply a small bead of EPNOC AP (N)0 to the shaft of the feed adjuster 1. 3.
Page 175 Module Feed/rotary hook module Drop ASSY assembly 1. Attach the retaining ring (E3) to the outer groove on the vertical feed shaft 1, and then place the polyester slider 2 onto the shaft. 2. Insert the vertical feed shaft 1 into the right shaft hole on the vertical supporting plate 3.
Page 176 Module Feed/rotary hook module Drop assembly attachment 1. Attach the drop assembly 1 to the inside of the base plate with the 2 screws 1. *Key point • Engage the 2 positioning tabs on the vertical supporting plate of the drop assembly 1 with the corresponding positioning holes on the base plate.
Page 177 Module Feed/rotary hook module Lower shaft B ASSY assembly 1. Attach the set screw collar 2, thrust wafer 3, lower shaft bushing 4, and thrust washer 3 to the shorter shaft of the lower shaft B assembly 1 in this order, and then attach the retaining ring (E6). *Key point •...
Page 178 Module Feed/rotary hook module Lower shaft B assembly attachment 1. Attach the bushing supporter A 1 to the base plate. *Key point • Engage the 2 positioning tabs on the bushing supporter A 1 with the corresponding positioning holes on the base plate. 2.
Page 179 Module Feed/rotary hook module Drop assembly adjustment 1. Loosen the screw 1 to free the set screw collar 1, and then move the vertical lever 2. *Key point • Move the vertical lever 2 until the cam contact section 4 of the vertical lever 2 is directly above the vertical feed cam 3 of the lower shaft B assembly.
Page 180 Module Feed/rotary hook module Feed arm ASSY assembly 1. Apply 1 or 2 drops of FBK OIL RO 100 to the shaft 2 of the feed supporting plate assembly 1. 2. Place the feed arm B assembly 3 onto the shaft 2 of the feed supporting plate assembly 1, and then attach the retaining ring (E2).
Page 181 Module Feed/rotary hook module Feed arm assembly attachment 1. Insert the feed arm assembly 1 from the bottom. *Key point • Insert the feed rectangular side shaft 3 of the feed arm B 2 into the feed adjuster 4 on the top side. 2.
Page 182 Module Feed/rotary hook module Shaft stopper plate attachment 1. Attach the shaft support plate 1 to the base plate with the screw 1. *Key point • Engage the positioning tab on the shaft support plate 1 with the positioning hole on the base plate. Torque Screw, Bind ·...
Page 183 Module Feed/rotary hook module F pulse motor holder assembly attachment 1. Lift the F gear of the feed adjuster 1. 2. Place the F pulse motor holder assembly 2 in the bushing of bushing supporter B 3. 3. Place the spring between the F pulse motor holder 4 and the base plate 5, and tighten the screw 1.
Page 184 Module Feed/rotary hook module F gear adjustment 1. Apply a small bead of EPNOC AP (N)0 to the gear surface of the feed adjuster 1. 2. Rotate the gear 4 of the F pulse motor clockwise until the stopper 3 of the F pulse motor contacts the shaft 2 (with the rubber mounted).
Page 185 Module Feed/rotary hook module Spring attachment 1. Attach the spring to the spring holes on the base plate 1 and the FPM holder 2. 19.8 SPRING XC2538*** Vertical feed bush attachment 1. Attach the vertical feed bush 1 to the base plate with the 2 screws 1. *Key point •...
Page 186 Module Feed/rotary hook module Vertical adjusting screw attachment 1. Attach the M5 nut 2 to the vertical adjusting screw 1. *Key point • Rotate the M5 nut 2 until it is approximately 1.5 mm from the top end of the vertical adjusting screw 1. 2.
Page 187 Module Feed/rotary hook module Feed dog correction plate attachment 1. Attach the feed dog correction plate 1 to the feed dog base assembly 2 with the screw 1. *Key point • Move the feed dog correction plate 1 upward to attach it. Torque Screw M3X8...
Page 188 Module Feed/rotary hook module Feed dog base assembly attachment 1. Apply a small bead of MOLYKOTE EM-30L to the shaft holes at the right and left ends of the feed bar 1. 2. Attach the polyester slider 3 to the inside of the feed bar 1 on the left side, and then place the feed dog base assembly 2 in the feed bar 1.
Page 189 Module Feed/rotary hook module Feed bar assembly attachment 1. Apply a small bead of MOLYKOTE EM-30L to the hole on the feed shaft 2 of the feed bar 1. 2. Place the feed bar 3 in the base plate assembly. 3.
Page 190 Module Feed/rotary hook module Spring attachment 1. Attach the spring to the feed bar 1 and the vertical feed shaft 2. 23.4 SPRING XZ0385*** 3 - 82...
Page 191 Module Feed/rotary hook module Outer rotary hook attachment 1. Apply a bead of MOLYKOTE EM-30L to the outer rotary hook attachment face of the shaft supporter 1. 2. Apply a small bead of EPNOC AP (N)0 to the groove on the outer rotary hook shaft 2.
Page 192 Module Feed/rotary hook module Feed dog attachment 1. Attach the feed dog 1 to the feed dog base with the 2 screws 1. Torque Screw, Bind · M3X6 0.78 – 1.18 N Needle plate A assembly 1. Attach the stopper plate 1 to the rear of the needle plate A 2 with the screw 1.
Page 193 Module Feed/rotary hook module Photo diode holder ASSY assembly 1. Engage the photo diode holder assembly 1 with the 2 hooks on the photo diode holder 2. Photo diode holder assembly attachment 1. Attach the photo diode holder assembly 1 to the inner rotary hook bracket 2 with the screw 1.
Page 194 Module Feed/rotary hook module Inner rotary hook bracket assembly 1. Attach the inner rotary hook bracket 1 to the stopper plate block 2 with the screw 1. *Key point • Engage the positioning tab on the inner rotary hook bracket 1 with the positioning slot on the stopper plate block 2.
Page 195 Module Feed/rotary hook module Drop lever Q attachment 1. Insert the base plate 2 into the groove below the drop lever Q 1. 2. Position the drop lever Q 1 and the vertical lever 3 as shown in the illustration on the right. 3.
Page 196 Module Feed/rotary hook module Drop indicator attachment 1. Attach the indicator sheet 1 with the screw 1. 2. Attach the drop indicator 2, and then attach the retaining ring E3. 3. Attach the spring *Key point • Move the drop indicator 2 vertically to check that it operates (a click can be heard).
Page 197 Module Drop module location diagram 3 - 89...
Page 198: Drop Module
Module Drop module D pulse motor attachment 1. Attach the D pulse motor 1 to the drop frame assembly 2 with the 2 screws 1. Torque Screw, Bind · M3X8 0.79 – 1.18 N Reversal link attachment Retaining ring E2 1.
Page 199 Module Drop module Push link assembly attachment 1. Apply a bead of EPNOC AP (N) 0 to the boss section 1 of the drop frame assembly 2 and the motor gear 3. 2. Attach the hook section 4 of the reversal link 5 to the hole of the push link assembly 6.
Page 200 Module Drop module Driven gear attachment 1. Apply a light covering of EPNOC AP (N) 0 to the groove of the rear driven gear 1 and gear teeth 2. 2. Attach the driven gear 1 to the calking shaft C of the drop frame assembly 3 and then attach the retaining ring E3.
Page 201 Module Needle-presser module location diagram 3 - 93...
Page 202: Needle-Presser Module
Module Needle-presser module Presser dial gear attachment 1. Apply a light covering of MOLYKOTE EM30L to the oscillating sections of the presser foot rack 1 gear and the unit holder 2. 2. Insert the presser foot rack 1 into the unit holder 2. 3.
Page 203 Module Needle-presser module Shaft bushing attachment 1. Attach the shaft bushing 1 to the unit holder with the 2 screws 1. *Key point • Insert the shaft bushing from the inside of the unit holder. Torque Screw, Pan (S/P washer) ·...
Page 204 Module Needle-presser module Thread take-up lever link attachment 1. Insert the shaft 1 into the shaft hole on the shaft bushing 2. *Key point • Insert the shaft 1 from the end without a groove for a retaining ring. 2. Apply a light covering of MOLYKOTE EM30L to the circumference of the shaft hole on the thread take-up lever link 3.
Page 205 Module Needle-presser module Presser bar attachment 1. Insert the presser bar bushing 1 into the shaft hole on the bottom of the unit holder. 2. Attach the plate spring 2 to the unit holder with the screw 1. *Key point •...
Page 206 Module Needle-presser module T cam attachment 1. Place the polyester slider 1 onto the T cam attachment shaft 2 of the unit holder. 2. Apply a small bead of MOLYKOTE EM30L to the T cam attachment shaft 3. Apply a light covering of MOLYKOTE EM30L to the cam groove on the T cam 3.
Page 207 Module Needle-presser module Z pulse motor assembly attachment 1. Apply 1 or 2 drops of FBK OIL RO 100 to the shaft of the Z pulse motor assembly 1. 2. Attach the insulation tape to the PCB of the Z pulse motor assembly 1. 3.
Page 208 Module Needle-presser module Thread release lever assembly attachment 1. Apply a small bead of MOLYKOTE EM30L to the calking shaft (center) 2 of the thread release lever 1. 2. Insert the calking shaft (center) 2 of the thread release lever 1 into the shaft hole on the unit holder, and then attach the retaining ring (E3).
Page 209 Module Needle-presser module Z zigzag lever assembly attachment 1. Attach the cap 1 to the tip of the Z zigzag lever assembly 2 as shown in the illustration on the right. 2. Apply a small bead of MOLYKOTE EM30L to the calking shaft (center) of the Z zigzag lever assembly 2.
Page 210 Module Needle-presser module Thread take-up counter weight attachment 1. Temporarily attach the 4 screws 1 to the thread take-up counter weight 1. 2. Attach the retaining ring (E8) to the groove on the unit shaft 2, and then insert the thrust washer 3 from the D-cut face of the unit shaft 2. 3.
Page 211 Module Needle-presser module Thread take-up lever assembly attachment 1. Apply a bead of MOLYKOTE EM30L to the 2 calking shafts of the needle bar crank 1. 2. Apply a bead of MOLYKOTE EM30L to the calking shaft of the thread take-up lever assembly 2.
Page 212 Module Needle-presser module Tension release rod attachment 1. Apply a small bead of MOLYKOTE EM30L to the calking shaft of the tension release rod 1. 2. Insert the calking shaft of the thread release lever assembly 3 into the slot on the tension release rod 2, and then insert the calking shaft of the tension release rod 1 into the shaft hole on the unit holder.
Page 213 Module Needle-presser module Press foot lifter attachment Retaining ring E4 1. Attach the retaining ring (E4) to the groove near the edge of the presser lift shaft 1. 2. Apply a light covering of MOLYKOTE EM30L to the surface of the presser lift shaft 1.
Page 214 Module Needle-presser module Release plate assembly attachment 1. Apply a small bead of MOLYKOTE EM30L to the calking shaft at the end of the release plate assembly 1. 2. Insert the release plate assembly 1 into the shaft hole on the unit holder. *Key point •...
Page 215 Module Needle-presser module Adjusting plate ASSY assembly Retaining ring E3 1. Apply a small bead of EPNOC AP (N)0 to the calking shaft of the adjusting plate 1. 2. Place the switch lever 2 and the spring onto the calking shaft of the adjust plate 1, and then attach the retaining ring (E3).
Page 216 Module Needle-presser module Adjusting plate assembly attachment 1. Place the spring onto the presser lift shaft 1. 2. Attach the L-shaped section of the spring to the groove on the presser foot lifter 2. 3. Attach the adjusting plate assembly 3 to the unit holder with the 2 screws *Key point •...
Page 217 Module Needle-presser module Lever AB unit assembly 1. Attach the needle threader driving plate 2 to the lever AB assembly 1 with the screws 1. Torque Screw, Bind · M3X4 0.78 – 1.18 N Lever AB ASSY assembly 1. Attach the cap 2 to the lever B 1. 2.
Page 218 Module Needle-presser module Lever AB assembly attachment Retaining ring E2 1. Attach the retaining ring (E2) to the groove on the inside of the lever guide shaft 1. 2. Apply a light covering of EPNOC AP (N)0 to the surface of the lever guide shaft 1.
Page 219 Module Needle-presser module Threader lever SW unit attachment 1. Attach the threader lever switch 2 and the presser switch holder 3 to the switch lever plate 1 with the screw 1. 2. Attach the unit holder 4 with the screw 2. Torque Screw, Bind ·...
Page 220 Module Needle-presser module Needle holder ASSY assembly 1. Apply a bead of MOLYKOTE EM30L to the needle bar hook 2 of the needle bar block 1. 2. Insert the needle bar assembly 3 from the bottom of the needle holder assembly, and then insert the needle bar block 1.
Page 221 Module Needle-presser module Release lever ASSY assembly Retaining ring E2.5 1. Attach the retaining ring (E2.5) to the groove on the release lever shaft 1. 2. Attach the thrust washer 2 and the release lever 3 to the release lever shaft 1.
Page 222 Module Needle-presser module Release guide plate attachment 1. Apply a light covering of EPNOC AP (N)0 to the groove on the release guide plate 1. 2. Attach the release guide plate 1 to the needle holder assembly (in the position shown in the photo on the right) with the screw 1. *Key point •...
Page 223 Module Needle-presser module Needle holder assembly attachment 1. Apply 1 or 2 drops of MOLYKOTE (OILER B ASSY 90% + MOLYKOTE M DISPERSION 10%) to the shaft of the needle bar block 2. 2. Insert the needle holder assembly 1 from the top of the unit holder. 3.
Page 224 Module Needle-presser module Spring attachment 1. Attach the spring to the plate 1 and the needle bar hook stand assembly 2. 2. Attach the guard plate 3 with the screw 1. *Key point • Attach the spring in the following direction: ⇒...
Page 225 Module Needle-presser module Needle holder shaft block attachment 1. Apply a small bead of EPNOC AP (N)0 to the needle roller 1 of the needle holder assembly. 2. Insert the needle holder block 2 into the needle roller 1. *Key point •...
Page 226 Module Needle-presser module Spring attachment 1. Attach the spring to the plate 1 and the groove at the upper section of the unit holder 2. *Key point • Attach the end with the shorter hook to the plate 1 and the end with the long hook to the unit holder 2.
Page 227 Module Needle-presser module Lock nut attachment 1. Attach the lock nut 1 to the screw 1. *Key point • Thread the lock nut 1 to the mid point of the screw 1. 2. Attach the screw 1 to the upper rear section of the unit holder. *Key point •...
Page 228 Module Needle-presser module PT holder ASSY 1. Insert the cloth thickness sensor assembly 1 from the bottom of the PT holder 2. 2. Attach the plain washer (M6) 3 and the #1 nut 4 to the shaft of the cloth thickness sensor assembly 1, and then tighten the #1 nut 4.
Page 229 Module Needle-presser module PT holder assembly attachment 1. Temporarily attach the screw 1 to the screw hole on the side face of the PT holder assembly 1. 2. Attach the PT holder assembly 1 to the unit holder with the screw 2. *Key point •...
Page 230 Module Needle-presser module Presser dial attachment 1. Raise the presser foot 1. 2. Insert the presser dial 2 into the presser dial shaft assembly 3 on the rear of the unit holder, and then attach the retaining ring (E4). 3. Insert the 2 plain washers 4 and the spring washer 5 into the presser dial *Key point •...
Page 231 Module Needle-presser module Presser pulse motor holder assembly attachment 1. Attach the presser pulse motor holder assembly 1 to the unit holder with the screws 1 and 2 (2 for 2). *Key point • Tighten the screws 1 and 2 in the following order: 1 (temporarily tighten), 2 (fully tighten both), and 1 (fully tighten).
Page 232 Module Needle-presser module Threader hook assembly attachment 1. Assemble the threader hook assembly 1, link A assembly 2, link B assembly 3, and thread guide assembly 4. 2. Align the pin of needle threader shaft A 5 with the shaft hole on the threader hook assembly 1, and then attach the threader hook assembly 1 to needle threader shaft 5.
Page 233 Adjustment Touch panel adjustment......4 - 2 Timing belt tension adjustment ....4 - 3 Motor belt tension adjustment....4 - 4 Upper shaft rotation shutter angle adjustment... 4 - 5 Three point needle drop adjustment ..4 - 6 Needle clearance left/right adjustment..
Page 234: Adjustment
Adjustment Touch panel adjustment 1. Turn the power on while holding down the [Start/Stop], [Reverse stitch], and [Needle position] buttons. 2. Touch the positions marked with crosses (+) on the touch panel in order from 1 to 5. NOTE • Setting is successful if a single beep sounds when "5" is pressed. •...
Page 235: Timing Belt Tension Adjustment
Adjustment Timing belt tension adjustment 1. Loosen the pan head screw (S/P washer, M4X10) securing the tension pulley assembly. 2. Adjust the position of the tension pulley so that the belt deflects 2.95 to 3.05 mm when a force of 1.96N (200g) is applied to the center of the belt.
Page 236: Motor Belt Tension Adjustment
Adjustment Motor belt tension adjustment 1. Loosen the Upset M4X12DB securing the motor holder. 2. Adjust the position of the motor holder so that the belt deflects 1.5 to 3.5 mm when a force of 0.98N (100g) is applied to the center of the belt. 3.
Page 237: Upper Shaft Rotation Shutter Angle Adjustment
Adjustment Upper shaft rotation shutter angle adjustment 1. Start the test mode. 2. Select test mode "22". (NP sensor mode) 3. Turn the pulley to raise the needle bar to the limit. 4. Loosen the screws securing the upper shaft rotation shutter. ±...
Page 238: Three Point Needle Drop Adjustment
Adjustment Three point needle drop adjustment 1. Remove the front cover, and turn the power on while pressing [SW3] and [SW4] on the main PCB assembly. 2. Press [SW4] (select test mode "4" when the front cover is attached). 3. Turn the pulley by hand until the tip of the needle enters the needle hole. 4.
Page 239: Needle Clearance Left/Right Adjustment
Adjustment Needle clearance left/right adjustment 1. Turn the pulley by hand until the tip of the needle enters the needle hole. 2. Loosen the screw (3X10). 3. Move the needle holder shaft block to the left or right so that the needle drop is centered over the needle hole on needle plate A at the left base line and right base line.
Page 240: Needle Bar Rising Adjustment
Adjustment Needle bar rising adjustment 1. Remove the front cover, and turn the power on while pressing [SW3] and [SW4] on the main PCB assembly. ← 2. Press [SW4] four times (select test mode "4" and then " " when the front cover is attached) to move the needle bar to the left base line.
Page 241: Needle Bar Height Adjustment
Adjustment Needle bar height adjustment 1. Remove the front cover, and turn the power on while pressing [SW3] and [SW4] on the main PCB assembly. ← 2. Press [SW4] four times (select test mode "4" and then " " when the front cover is attached) to move the needle bar to the left base line.
Page 242: Needle Threader Adjustment
Adjustment Needle threader adjustment 1. Attach a needle. 2. Turn the pulley to raise the needle bar to the limit. 3. Loosen the socket set screw (FT, M4X4) securing the needle thread block. 4. Adjust the height of the needle thread block so that the threading hook passes through the needle hole, and secure the needle thread block with the socket set screw (FT, M4X4).
Page 243: Clearance Between Needle And Rotary Hook Point Adjustment
Adjustment Clearance between needle and rotary hook point adjustment 1. Remove the front cover, and turn the power on while pressing [SW3] and [SW4] on the main PCB assembly. ← 2. Press [SW4] four times (select test mode "4" and then " "...
Page 244: Presser Bar Height And Parallelism Adjustment
Adjustment Presser bar height and parallelism adjustment 1. Attach J presser foot. 2. Raise the presser foot lifter. 3. Turn the pulley by hand until the feed dog is lower than needle plate A. 4. Loosen the set screw (CP, M5X10) securing the presser bar clamp assembly. 5.
Page 245: Needle And Presser Front/Back Position Adjustment
Adjustment Needle and presser front/back position adjustment 1. Attach J presser foot. 2. Turn the pulley by hand until the tip of the needle enters the needle hole. 3. Loosen the lock nut. 4. Move the needle tip to the center position (front/back) of the needle hole using the socket set screw (CP, M4X12). 5.
Page 246: Fine Tension Adjustment
Adjustment Fine tension adjustment 1. Raise the presser foot lifter. 2. Pass the Schappe Spun Sewing Thread #60 through the thread guide and then the tension plate. 3. Lower the presser foot lifter. 4. Pull the thread with a tension gauge, and adjust the tension to 0.08 to 0.11N (8 to 11g) using the power lock (2x3). Tension plate Power lock 2x3 START...
Page 247: Upper Thread Tension Adjustment
Adjustment Upper thread tension adjustment 1. Raise the presser foot lifter. 2. Turn the power on. 3. Touch the panel. 4. Pass the Schappe Spun Sewing Thread #60 through the thread guide, Tension disk, and brake plate assembly in this order. 5.
Page 248: Thread Guide Shutter Clearance Adjustment
Adjustment Thread guide shutter clearance adjustment 1. Check that there is no step between the thread guide cover A and the thread guide cover B before adjustment. 2. Rotate the thread tension dial counterclockwise until it stops (Fig. 1). 3. Loosen the pan head screw (S/P washer, M3X6) securing the link A shaft plate assembly (Fig. 2). 4.
Page 249: Inner Rotary Hook Tension Adjustment
Adjustment Inner rotary hook tension adjustment Bobbin case with green screw (for embroidery) 1. Set a bobbin (wound with Schappe Spun Sewing Thread #60) to the inner rotary hook. 2. Pull the thread with a tension gauge, and adjust the tension to 0.10 to 0.12N (10 to 12g) using the spring adjusting screw.
Page 250: Inner Rotary Hook Bracket Position Adjustment
Adjustment Inner rotary hook bracket position adjustment 1. Set the inner rotary hook in the outer rotary hook. 2. Loosen the screw (bind, M3X8) securing the inner rotary hook bracket assembly. 3. Adjust the position of the inner rotary hook bracket assembly so that the inner rotary bracket assembly contacts the inner rotary hook along 1.6 to 1.8 mm, and secure the inner rotary hook bracket assembly with the screw (bind, M3X8).
Page 251: Cloth Pressure Setting Adjustment
Adjustment Cloth pressure setting adjustment 1. Attach J presser foot. 2. Start the test mode, and select test mode "02" 3. Turn the pulley by hand until the feed dog is lower than the needle plate. 4. Lower the presser lever, and then press [0] on the screen. 5.
Page 252: Feed Dog Height And Squareness Adjustment
Adjustment Feed dog height and squareness adjustment 1. Turn the pulley to raise the feed dog to limit. (The D-cut of lower shaft B should be facing up.) 2. Adjust the bolt 1 so that the far back tooth of the feed dog is 0.9 to 1.1 mm from the top face of needle plate A. 3.
Page 253: Front/Back And Left/Right Position Of Feed Dog Adjustment
Adjustment Front/back and left/right position of feed dog adjustment 1. Start the test mode, and select test mode "6". 2. Select the key. (Set the feed to "0" and the feed dog to center.) 3. Loosen the 2 screws (bind, M3X8), temporarily attach needle plate A, and adjust the front/back and left/right right positions of the feed dog.
Page 254: Feed Forward/Backward Adjustment
Adjustment Feed forward/backward adjustment 1. Attach J presser foot. 2. Remove the front cover, and turn the power on while pressing [SW3] and [SW4] on the main PCB assembly. (Select [13] in test mode.) 3. Press [SW2] to enter "Feed forward and backward mode." 4.
Page 255: Side Feed Straight Stitch Adjustment
Adjustment Side feed straight stitch adjustment 1. Attach N presser foot. 2. Start the test mode, and select test mode "36", and check sewing condition using Schappe Spun Sewing Thread #60. 3. Adjust the following so that the pattern shape is appropriate: 1Adjust the feed dog height and alignment so that the U-shape is almost on the right and the sewing length at the upper section is 26.0 to 31.0 mm.
Page 256: One Point Adjustment
Adjustment One point adjustment 1. Attach N presser foot. 2. Start the test mode, and select test mode "03" 3. Press the [Start/Stop] switch. 4. Adjust the correction value to prevent pattern overlapping, opening, and/or shift. If the pattern is compressed in the direction, press the vertical [ + ] button.
Page 257: Bobbin Winder Adjustment
Adjustment Bobbin winder adjustment 1. Move the tension guide assembly up and down to adjust the uneven bobbin winding. 4 - 25...
Page 258: Knee Lifter Position Adjustment
Adjustment Knee lifter position adjustment 1. Start the test mode, and select test mode "02" 2. Turn the pulley by hand until the feed dog is lower than the needle plate top face. 3. Lower the presser lever, and press [MIN] of the "KNEE LIFTER SETTING". 4.
Page 259: Bh Lever Switch Position Adjustment
Adjustment BH lever switch position adjustment 1. Raise the presser foot lifter. 2. Set the BH presser to a point two pitches less than the maximum length. 3. Attach the BH presser. 4. Lower the presser foot lifter. 5. Lower the BH lever, and set it to the BH presser. 6.
Page 260 4 - 28...
Page 261 Failure Investigation for Electronic Parts * Perform resistance measurements after turning off the power, and detaching the connectors to be measured from the PCB. Error message list ............5 - 2 The power does not come on........... 5 - 3 Pulse motors do not return to starting point .....
Page 262: Error Message List
Failure Investigation for Electronic Parts Error message list Error display Cause (5 - 29) Abnormal rotation in main motor. Key pressed continually with power ON (5 - 30) (operation system SW). (5 - 31) Dirty speed sensor (5 - 31) NP sensor disconnect (5 - 32) Speed VR disconnect...
Page 263: The Power Does Not Come On
Failure Investigation for Electronic Parts The power does not come on When the power is turned on, nothing appears on the LCD. When the power is turned on, does To next page the buzzer sound after a while? Is the power supply cord free from Connect the power supply damage and connected correctly? cord correctly or replace it.
Page 264 Failure Investigation for Electronic Parts The power does not come on From previous page Are two FFCs connected correctly between the main PCB and the card PCB? Are the upper Connect it properly. and lower connector locks applied correctly? Are FFCs connecting the main PCB Replace card to the card PCB free from breakage?
Page 265: Pulse Motors Do Not Return To Starting Point
Failure Investigation for Electronic Parts Pulse motors do not return to starting point When the power is turned ON, the pulse motors do not return to the starting point. • When needle is up : Z pulse motor returns to its original position. •...
Page 266 Failure Investigation for Electronic Parts Pulse motors do not return to starting point From previous page Is the resistance between the pins at the ends of each pulse motor lead wire 1 Ω or less? •AT, Z, C, and S pulse motor lead wires Between pins 1 &...
Page 267: The Touch Panel Does Not Work
Failure Investigation for Electronic Parts The touch panel does not work The touch panel does not work. Is the touch panel tuned correctly? Connect it properly. Is the touch panel’s FFC properly connected to connector CN1 on the Connect it properly. card PCB? Is FFC connected correctly between the main PCB (CN24) and the card PCB (CN7)? Are the upper...
Page 268: Main Motor Does Not Turn
Failure Investigation for Electronic Parts Main motor does not turn Main motor does not turn Adjust the upper shaft Does the pulley turn easily? assembly Is the main motor connector Reconnect it correctly correctly connected to the power PCB assembly (CN301)? Is the harness attached to the power PCB assembly correctly connected Reconnect it correctly...
Page 269 Failure Investigation for Electronic Parts Main motor does not turn From previous page Is the presser foot lifter down? Lower the presser foot lifter Are the resistance values for the PFSW-S assy. normal? · PFSW-S assy. resistance values Replace PFSW-S assy. When switch is pressed : 1Ω...
Page 270: Main Motor Rotation Abnormal
Failure Investigation for Electronic Parts Main motor rotation abnormal · Is there rotational variance in the main motor? · Does the rotation not reach top speed? · Can the speed not be adjusted? When the speed controller lever is moved with the power "on," does the voltage between pins 3 and 1 Replace VR PCB assy.
Page 271: Cannot Sew Pattern Well
Failure Investigation for Electronic Parts Cannot sew pattern well Normal pattern is not generated With the power OFF, can you lightly Adjust the attachment of the move the needle bar left and right by needle-presser module hand? Is the resistance between the pins at the ends of each pulse motor lead wire 1 Ω...
Page 272: Cannot Sew Button Holes Well
Failure Investigation for Electronic Parts Cannot sew button holes well Cannot sew button holes well Is the correct presser being used? Change to correct presser Is the resistance between pins 4 and 5 on · Adjust BH lever the BH switch connector (CN9) normal? ·...
Page 273: Stitch Length And Zigzag Width Cannot Be Done By Manual Adjustment
Stitch length and zigzag width cannot be Failure Investigation for Electronic Parts done by manual adjustment Stitch length and zigzag width cannot be done by manual adjustment. Does the LCD panel display change when the manual key for stitch length Adjust or replace the touch and the manual key for zigzag width panel.
Page 274: Problems With Vertical Needle Movement And Reverse Stitching
Problems with vertical needle movement and Failure Investigation for Electronic Parts reverse stitching Problems with vertical needle movement and reverse stitching Is the resistance of the start/stop switch, reverse switch, raise needle switch, thread cut switch, and presser Replace foot lifter normal? assembly.
Page 275: Does Not Operate When The Foot Controller Is Used
Failure Investigation for Electronic Parts Does not operate when the foot controller is used Does not operate when the foot controller is used. Is the resistance between pins 2 and 3 on the foot controller jack Replace the foot controller assembly connector normal? jack assembly.
Page 276: Needle Bar Relase Does Not Occur Normally
Failure Investigation for Electronic Parts Needle bar relase does not occur normally Needle bar relase does not occur normally Is the needle bar relase operation Adjust the needle-presser easy and smooth? module assembly Is the resistance between pins 1 & 1, 2 &...
Page 277: Thread Tensioning Does Not Go Well
Failure Investigation for Electronic Parts Thread tensioning does not go well Thread tensioning is not right Is the thread guide path correct? Set thread correctly Set the lower thread correctly Is the lower thread placement correct? Is the material, thread and needle Use the correct combination combination correct? Are the main PCB and AT initial sensor...
Page 278 Failure Investigation for Electronic Parts Thread tensioning does not go well From previous page Is the resistance between pins 1 & 1, 2 Replace the AT pulse motor & 2, 3 & 4, and 4 & 3 at the ends of the lead wire.
Page 279: Thread Cutter Does Not Work Normally
Failure Investigation for Electronic Parts Thread cutter does not work normally Thread cutter does not operate normally Adjust the assembly of the Do the thread hook assy. and lever thread cutter module gear move easily? Is the resistance between pins 1 & 1, 2 &...
Page 280: Bobbin Winding Cannot Be Done
Failure Investigation for Electronic Parts Bobbin winding cannot be done The bobbin winder motor does not rotate. Adjust the bobbin winder Is the bobbin winder mechanism mechanism for correct assembled and attached correctly? assembly and attachment Is the resistance between pins 1 and 2 on the BW switch assembly (D6) connector normal? Replace the BW switch...
Page 281: The Lamp At Hand Does Not Have Light
Failure Investigation for Electronic Parts The lamp at hand does not have light The lamp does not light. Is the lamp set to "ON"? Set the lamp to "ON." Are the main PCB assembly and Reconnect the main PCB LED lamp L assembly correctly assembly and LED lamp L connected? assembly.
Page 282 Failure Investigation for Electronic Parts The lamp at hand does not have light From previous page When the power PCB connector (main PCB (CN5)) is removed, is Replace the power supply the voltage between pins 5 & 6 5V unit. DC and pins 8 &...
Page 283: Bobbin Thread Detection Does Not Work Normally
Failure Investigation for Electronic Parts Bobbin thread detection does not work normally Bobbin thread detection does not work normally Are the main PCB assembly and Reconnect the main PCB photo diode assembly assembly and photo diode correctly connected? PCB assembly. Are the main PCB assembly and Reconnect the main PCB photo transistor PCB assembly...
Page 284: Upper Thread Sensor Does Not Work Normally
Failure Investigation for Electronic Parts Upper thread sensor does not work normally Upper thread sensor does not work normally Are the main PCB assembly and Reconnect the main PCB upper thread assembly assembly and upper thread correctly connected? PCB assembly. When the slit section of the upper thread PCB assembly is switched to the open / closed position with...
Page 285: The Presser Foot Lifter Does Not Work Correctly
Failure Investigation for Electronic Parts The presser foot lifter does not work correctly Abnormal presser foot lifter behavior Is the resistance of the SS PCB Adjust the SS PCB assembly, assembly switch normal? • Resistance of each switch When switch is pressed : 0 Ω replace the SS PCB assembly.
Page 286 Failure Investigation for Electronic Parts The presser foot lifter does not work correctly From previous page Is the cloth thickness sensor Connect it correctly. assembly correctly connected? Is the knee lifter sensor assembly Connect it correctly. connected correctly? When the presser is moved up and down with the power on, does the voltage between Replace the cloth thickness pins 2 and 3 on the main PCB assembly...
Page 287: Usb Function Cannot Be Used Normally
Failure Investigation for Electronic Parts USB function cannot be used normally Universal serial bus (USB) cannot be used normally. Is the USB cable properly connected to both the Connect it properly. personal computer and the sewing machine? Does the machine function normally when the Change USB cable.
Page 288: Feed Dog Drop Dose Not Work Normally
Failure Investigation for Electronic Parts Feed dog drop dose not work normally Feed dog does not work normally. Ia the feed dog drop operation Adjust the feed dog drop easy and smooth? module assy. Is the D pulse motor connector Reconnect it correctly.
Page 289: Error Is Displayed
Failure Investigation for Electronic Parts Error is displayed "F01" is displayed After the power supply unit is replaced, does the motor correctly Replace main PCB assy. rotate in test mode "14"? 5 - 29...
Page 290 Failure Investigation for Electronic Parts Error is displayed "F02" is displayed Is one of the SS key, NP key, BK key and CUT key stuck in a Replace SS PCB assy. pressed down condition? Release the switch that is stuck 5 - 30...
Page 291 Failure Investigation for Electronic Parts Error is displayed The error message "F05" or "F06" is displayed on the screen. Correctly connect the NP Is the NP PCB assembly correctly connected main PCB assembly to the main assembly (CN3)? PCB assembly (CN3). When the NP PCB assembly is replaced with a new one, does it Replace main PCB assy.
Page 292 Failure Investigation for Electronic Parts Error is displayed "F07" is displayed Connect the VR PCB assy. to Is the VR PCB assembly correctly CN4 on the card PCB assy. connected card correctly assembly (CN4)? Is FFC connected correctly between the main PCB (CN24) and the card Connect it properly.
Page 293 Special Instructions of Wiring Needle bar module wiring ......6 - 2 Rotary hook module wiring ......6 - 6 Thread cutter module wiring ....6 - 7 Main PCB wiring ........6 - 8 Front cover wiring ........6 - 11 Bobbin winder unit wiring .......6 - 12 6 - 1...
Page 294: Needle Bar Module Wiring
Special Instructions of Wiring Needle bar module wiring 1. Wiring on left side of needle-presser module Do not hang the lead wires over the right hook. 2. Wiring on upper side of needle-presser module Connect the lead wires so that the connected section is on the front side of the main body.
Page 295 Special Instructions of Wiring Needle bar module wiring 3. Wiring on right side of needle-presser module 4. Wiring on lower side of needle-presser module Pass the lead wires between the PCB and the holder. 6 - 3...
Page 296 Special Instructions of Wiring Needle bar module wiring 5. Wiring around upper shaft cover 6. Wiring of NP sensor 6 - 4...
Page 297 Special Instructions of Wiring Needle bar module wiring 7. Wiring on backside of arm bed Route the lead wires according to the sequence 1 to 4 below. 6 - 5...
Page 298: Rotary Hook Module Wiring
Special Instructions of Wiring Rotary hook module wiring Secure the lead wires with a band. Secure the lead wires with a clip. Secure the lead wires with a band. 6 - 6...
Page 299: Thread Cutter Module Wiring
Special Instructions of Wiring Thread cutter module wiring 1. Wiring on backside of thread-cutter module Secure the lead wires with a band. Pass the lead wires through the hole. Do not allow the lead wires to block the screw hole. 2.
Page 300: Main Pcb Wiring
Special Instructions of Wiring Main PCB wiring 1. Wiring at upper section of main PCB Route the lead wires as shown below. 6 - 8...
Page 301 Special Instructions of Wiring Main PCB wiring 2. Wiring at lower section of main PCB Secure the lead wires with a band. Secure the lead wires with a clip. 6 - 9...
Page 302: Front Cover Wiring
Special Instructions of Wiring Front cover wiring 1. Wiring at front side of front cover Secure the lead wires with a band. Pass the VR PCB lead wires between the front cover and plate C. 2. Wiring of inverter cover Pass the clip through the ferrite core and then bend the clip.
Page 303 Special Instructions of Wiring Front cover wiring 3. USB lead wire treatment Pass the clip through the ferrite core and then bend the clip. 6 - 11...
Page 304: Bobbin Winder Unit Wiring
Special Instructions of Wiring Bobbin winder unit wiring Follow the steps below to route the lead wires of the bobbin winder unit. 1. Hang four lead wires over the clip as shown in the photo on the left. 2. Bend the clip to the left. 3.

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Baby Lock BLSY Service Manual

2 Disassembly

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5 Failure Investigation

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