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Brother NV-10A Service Manual

Computerized sewing machine.
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SERVICE MANUAL FOR
COMPUTERIZED SEWING MACHINE
NV-10/NV-10A/ML-600
B-500/NS-10/CAMPUS300
NV15/NV15P/NS15/NV15WT
NV10A
7.2007.
7.2016.

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Table of Contents

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   Summary of Contents for Brother NV-10A

  • Page 1 SERVICE MANUAL FOR COMPUTERIZED SEWING MACHINE NV-10/NV-10A/ML-600 B-500/NS-10/CAMPUS300 NV15/NV15P/NS15/NV15WT NV10A 7.2007. 7.2016.
  • Page 3 LIST of UPDATE RECORD Date Added Models Contents 6.2012 NV15 8.2013 NV15P 9.2013 NS15 7.2014 NV15WT 7.2016 NV10A...
  • Page 4 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 - 7 2.
  • Page 5: Table Of Contents

    Disassembly of Thread unit L (Removal of Thread catching spring case) .........2 - 21 Bobbin winder mechanism ................2 - 22 Removal of Bobbin base assy......................2 - 23 Disassembly of Bobbin base assy....................2 - 23 Removal of Bobbin winder assy......................2 - 24 Disassembly of Bobbin winder assy.
  • Page 6 Removal of Inner rotary hook bracket assy..................2 - 45 Removal of Outer rotary hook assy....................2 - 46 Removal of Spring ...........................2 - 46 Removal of FPM holder sub assy....................2 - 47 Removal of F pulse motor .......................2 - 47 Removal of Spring ...........................2 - 48 Removal of Feed bar ........................2 - 48 Removal of Vertical adjuster screw assy.
  • Page 7 Assembly of Thread unit L (Attachment of Thread guard cover) ..........3 - 21 Electrical parts and main motor ...............3 - 22 Attachment of Main motor sub assy....................3 - 23 Assembly of Main motor sub assy....................3 - 23 Attachment of Pin jack assy......................3 - 24 Attachment of PWSW assy.
  • Page 8 Attachment of Thread take-up lever link ..................3 - 52 Attachment of BH switch assy......................3 - 53 Attachment of Presser feed holder assy...................3 - 53 Feed and bobbin module .................3 - 54 Attachment of Feed adjuster assy....................3 - 55 Assembly of Feed adjuster assy.
  • Page 9 Adjustment of Bobbin winder (uneven bobbin winding and bobbin winding amounts) ..4 - 18 Adjustment of BW switch position ..............4 - 19 Adjustment of BH lever switch position ............4 - 20 Adjustment of Front/back, left/right position of feed dog ........4 - 21 Adjustment of Feed dog height ................4 - 22 Adjustment of Inner rotary hook bracket position ..........4 - 23 5.
  • Page 10 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 - 7 1 - 1...
  • Page 11: Main Mechanisms

    Outline of Mechanism Main Mechanisms Main body Bobbin winder Thread guide mechanism mechanism Needle bar / Presser Upper shaft mechanism mechanism Needle thread block mechanism Rotary hook drive mechanism Feed / Rotary hook mechanism 1 - 2...
  • Page 12: Driveline

    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 13: Positions Of Electronic Components

    Outline of Mechanism Positions of electronic components Main body PCB assy : SS-VR Power supply assy. Power switch Foot controller jack Inlet assy. SW assy : BW LCD PCB assy. SW assy : PF-F Z pulse motor Main PCB NP sensor BH change switch LED lamp R assy.
  • Page 14: Control System Block Diagram

    Outline of Mechanism Control system block diagram ARM BED side PF SW BH SW BW SW MAIN PCB ASSY Sensor 2 Sensor 1 Sensor Foot controller jack Z pulse motor Drive circuit Buzzer F pulse EEPROM motor Drive circuit Main motor Reset IC FRONT COVER side POWER PCB ASSY...
  • Page 15: Operation Of Other Electronic Components

    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 16: Using The Threader

    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 17 1 - 8...
  • Page 18: Disassembly

    Disassembly Main unit Main parts........2 - 2 Electrical parts and main motor ..2 - 15 Thread tension mechanism ... 2 - 19 Bobbin winder mechanism .... 2 - 22 Feed mechanism ......2 - 26 Needle bar, presser mechanism / Upper shaft mechanism....
  • Page 19: Main Unit Main Parts

    Main unit Main parts Main parts location diagram 2 - 2...
  • Page 20 Main unit Main parts Removal of Accessory table 1. Remove the accessory table 1. Disassembly of Accessory table 1. Remove the accessory table door 2 from the accessory table 1. Removal of Face plate assy. 1. Remove the screw 1, and then remove the face plate assy. 1. Disassembly of Face plate assy.
  • Page 21 Main unit Main parts Removal of Needle plate B assy. 1. Remove the needle plate cover 1. *Key point • Slide the slide button 2, and then remove it. 2. Remove the needle plate B assy. 3. Disassembly of Needle plate B assy. 1.
  • Page 22 Main unit Main parts Removal of Free arm plate 1. Remove the 2 screws 1, and then remove the free arm plate 1. Removal of Base plate cover 1. Remove the 2 screws 1, and then remove the base plate cover 1 from the base plate.
  • Page 23 Main unit Main parts Removal of Front cover assy. 1. Remove the screw 1 and 2. 2. Remove the hook 1 of the front cover assy., and then remove the hooks 2 and 3 while pushing the parts of 4 and 5 (Rear cover side) *Key point •...
  • Page 24 Main unit Main parts Disassembly of Front cover assy. (Removal of LED lamp-R) 1. Remove the connector 2 of the LED lamp-R 1 from the SSVR PCB assy. 2. Remove the screw 1 , and then remove the LED lamp-R 1. Disassembly of Front cover assy.
  • Page 25 Main unit Main parts Disassembly of Front cover assy. (Removal of SV key top) 1. Remove the SV key top 1 from the front cover assy. *Key point • Undo the hooks 2 (2 locations) from the backside of the front cover assy.
  • Page 26 Main unit Main parts Removal of Selecting panel H assy. 1. Remove the 4 screws 1. 2. Push up the hooks 1 (4 locations) from the backside of the front cover assy.,and then remove the selecting panel H assy. 2. Disassembly of Selecting panel H assy.
  • Page 27 Main unit Main parts Disassembly of Selecting panel H assy. (Removal of Buttons) 1. Remove the feed adjusting button 1, the adjusting button 2 and the reinforcement stitch button 3 from the selecting panel H assy. 2 - 10...
  • Page 28 Main unit Main parts Disassembly of Selecting panel H assy. (Removal of Selecting dial) 1. Remove the screw 1, and then remove the selecting shutter 1 from the selecting panel H assy. 2. 2. Remove the indication sheet H 3 from the selecting shutter 1. 3.
  • Page 29 Main unit Main parts Removal of Rear cover assy. 1. Remove the 2 screws 1. 2. Remove the hook 1, and then remove the rear cover assy. 2 from the arm bed. *Key point • Check that the section 3 get over the presser lever 4. •...
  • Page 30 Main unit Main parts Disassembly of Rear cover assy. (Removal of Spool pin) 1. Remove the screw 1, and then remove the spool pin holder assy. 1 from the rear cover assy. 2. Remove the spool pin 2 from the shaft of the spool pin holder assy.1. 3.
  • Page 31 Main unit Main parts Disassembly of Rear cover assy. (Removal of Thread guide plate assy.) 1. Remove the screw 1 , and then remove the thread guide plate assy. 1 from the rear cover assy. 2 - 14...
  • Page 32 Main unit Electrical parts and main motor Electrical parts and main motor location diagram 2 - 15...
  • Page 33: Electrical Parts And Main Motor

    Main unit Electrical parts and main motor Removal of Shutter cover 1. Cut the 2 bands 1. 2. Unplug all of the connectors on the motor PCB assy. 2, and then remove the insulator sheet 3. 3. Remove the 2 screws 1, and then remove the shutter cover 4 from the arm bed.
  • Page 34 Main unit Electrical parts and main motor Removal of Power supply assy. 1. Remove the screw 1, and then remove the insulator sheet 1. 2. Remove the screw 2, and then remove the coaching clip 2. 3. Disconnect the connectors 3 and 4. 4.
  • Page 35 Main unit Electrical parts and main motor Removal of PWSW assy. 1. 1. Remove the PWSW assy. 1 from the insulation cover 2. *Key point • Remove it from the backside of the insulation cover 2 while pushing the hooks (2 locations). Removal of Pin jack assy.
  • Page 36 Main unit Thread tension mechanism Thread tension mechanism location diagram 2 - 19...
  • Page 37: Thread Tension Mechanism

    Main unit Thread tension mechanism Removal of Thread unit L 1. Remove the 2 screws 1, and then remove the thread unit L 1 from the arm bed. Disassembly of Thread unit L (Removal of Thread guard cover) 1. Remove the thread guard cover 1 from the thread unit L 2. *Key point •...
  • Page 38: Disassembly Of Thread Unit L (removal Of Thread Catching Spring Case)

    Main unit Thread tension mechanism Disassembly of Thread unit L (Removal of Thread tension dial) 1. Remove the screw 1, and then remove the notched spring 1. 2. Remove the tension dial shaft 2, and then remove the thread tension dial 3, the thread tension plate 4 and the thread tension adjusting screw 5.
  • Page 39: Bobbin Winder Mechanism

    Main unit Bobbin winder mechanism Bobbin winder mechanism location diagram 2 - 22...
  • Page 40: Bobbin Winder Mechanism

    Main unit Bobbin winder mechanism Removal of Bobbin base assy. 1. Remove the bobbin base assy. 1 from the bobbin winder assy. 2. Disassembly of Bobbin base assy. 1. Remove the bobbin thread cutter holder 2 from the bobbin base assy. 1. *Key point •...
  • Page 41: Removal Of Bobbin Winder Assy

    Main unit Bobbin winder mechanism Removal of Bobbin winder assy. 1. Remove the 2 screws 1, and then remove the bobbin winder assy. 1. Disassembly of Bobbin winder assy. (Removal of SW assy : BW-F) 1. Undo the hooks 1 (2 locations), and then remove SW assy : BW-F 2 from the bobbin winder assy.
  • Page 42: Disassembly Of Bobbin Winder Assy. (removal Of Bobbin Winder Shaft Stopper)

    Main unit Bobbin winder mechanism Disassembly of Bobbin winder assy. (Removal of Bobbin winder shaft stopper) 1. Remove the screw 1, and then remove the bobbin winder shaft stopper 1 from the bobbin winder assy. holder 2. Disassembly of Bobbin winder assy. (Removal of SW adjust plate) 1.
  • Page 43: Feed Mechanism

    Main unit Feed mechanism Feed mechanism location diagram 2 - 26...
  • Page 44: Feed Mechanism

    Main unit Feed mechanism Removal of Tension pulley assy. 1. Remove the screw 1, and then remove the tension pulley assy. 1 from the arm bed. Removal of Lower shaft bushing 1. Remove the screw 1, and then remove the lower shaft bushing 1. Removal of Inner rotary hook assy.
  • Page 45: Removal Of Feed Module

    Main unit Feed mechanism Removal of Feed module 1. Remove the screw 1 and the 2 screws 2, and then remove the feed module 1 from the arm bed. *Key point • Move up and remove the feed module 1, and then remove the timing puley D 2 from the T belt 3.
  • Page 46: Needle Bar, Presser Mechanism

    Main unit Needle bar, presser mechanism / Upper shaft mechanism Needle bar, presser mechanism / Upper shaft mechanism location diagram 2 - 29...
  • Page 47: Removal Of Bushing Presser (for Upper Shaft)

    Main unit Needle bar, presser mechanism / Upper shaft mechanism Removal of Bushing presser (For upper shaft) 1. Remove the 2 screws 1, and then remove the 2 bushing pressers 1 from the arm bed. Removal of Upper shaft assy. 1.
  • Page 48: Removal Of Needle-presser Module

    Main unit Needle bar, presser mechanism / Upper shaft mechanism Removal of Needle-presser module 1. Remove the screw 1. 2. Remove the 2 screws 2, and then remove the 2 presser plates 1. 3. Remove the needle-presser module 2 from the arm bed. Removal of Plate spring 1.
  • Page 49: Base Plate And Handle

    Main unit Base plate and handle Base plate and handle location diagram 2 - 32...
  • Page 50: Base Plate And Handle

    Main unit Base plate and handle Removal of Base plate 1. Remove the 3 screws 1, and then remove the base plate 1. Removal of Inlet assy. 1. Remove the screw 1, and then remove the inlet assy. 1. Removal of Adjusting screw assy., Base rubber A 1.
  • Page 51: Removal Of Handle

    Main unit Base plate and handle Removal of Handle 1. Remove the 2 screws 1, and then remove the handle holder 1 from the arm bed. 2. Remove the 2 retaining rings E4, and then remove the 2 polyester sliders 3.
  • Page 52: Needle-presser Module

    Modules Needle-presser module Needle-presser module breakout diagram 2 - 35...
  • Page 53: Modules Needle-presser Module

    Modules Needle-presser module Removal of Presser feed holder assy. 1. Remove the Z foot 1. 1. Remove the screw 1, and then remove the presser feed holder assy. 2 from the presser bar 3. Removal of BH switch assy. 1. Remove the screw 1, and then remove the BH switch assy. 1. Removal of Thread take-up lever link 1.
  • Page 54: Removal Of Needle Bar Crank Rod Assy

    Modules Needle-presser module Removal of Needle bar crank rod assy. 1. Remove the needle bar crank rod assy. 1 from the needle bar block 2. 2. Remove the screw 1, and then remove the thread take-up lever 3 from the needle bar crank rod assy. 1. *Key point •...
  • Page 55: Removal Of Needle Bar Assy

    Modules Needle-presser module Removal of Needle bar assy. 1. Remove the 2 screws 1, and then pull the needle bar assy. 1 from the needle bar supporter assy., and then remove the needle thread block 2 and the needle bar block 3. Disassembly of Needle bar assy.
  • Page 56: Removal Of Needle Bar Supporter Assy

    Modules Needle-presser module Removal of Needle bar supporter assy. 1. Remove the spring and the spring , and then remove the needle bar supporter assy. 1 from the base holder assy. Removal of Threader hook assy. 1. Remove the threader hook assy. 2 from the needle bar holder assy. 1. *Key point •...
  • Page 57: Removal Of Needle Holder Shaft A

    Modules Needle-presser module Removal of Needle holder shaft A 1. Remove the spring 2. Remove the screw 1, and then remove the plate 1 from the needle bar supporter assy. 3. Remove the screw 2, and then pull the shaft 2, and then remove the needle holder shaft A 3 from the needle bar supporter assy.
  • Page 58: Removal Of Presser Bar

    Modules Needle-presser module Removal of Presser bar 1. Remove the screw 1, and then pull the presser bar 1 from the base holder assy., and then remove the spring 2 and the presser bar clamp 3. Removal of Thread release lever 1.
  • Page 59: Removal Of Z Zigzag Lever Assy

    Modules Needle-presser module Removal of Z zigzag lever assy. Retaining ring E4 1. Remove the Z lever cap 2 from the Z zigzag lever assy. 1. 2. Remove the retaining ring E4, and then remove the Z zigzag lever assy. 1 and the polyester slider 3.
  • Page 60: Removal Of Z Pulse Motor

    Modules Needle-presser module Removal of Z pulse motor 1. Remove the 2 screws 1, and then remove the Z pulse motor 1 from the base holder assy. 2. Remove the lead wire sub assy. 2 from the Z pulse motor 1. Removal of Lock nut 1.
  • Page 61: Feed And Bobbin Module

    Modules Feed and bobbin module Feed and bobbin module breakout diagram 2 - 44...
  • Page 62: Feed And Bobbin Module

    Modules Feed and bobbin module Removal of Needle plate A assy. 1. Remove the 2 screws 1, and then remove the needle plate A assy. 1. Disassembly of Needle plate A assy. 1. Remove the screw 1, and then remove the F gear stopper plate 1 from the needle plate A 2.
  • Page 63: Removal Of Outer Rotary Hook Assy

    Modules Feed and bobbin module Removal of Outer rotary hook assy. 1. Remove the screw 1, and then pull the outer rotary hook shaft 1, and then remove the spacer 2, the outer rotary hook assy. 3, the washer 6 4 and the spacer 5 from the shaft supporter 6.
  • Page 64: Removal Of Fpm Holder Sub Assy

    Modules Feed and bobbin module Removal of FPM holder sub assy. 1. Remove the screw 1. 2. Remove the screw 2, and then remove the spring 3. Remove the retaining ring CRS-10, and then remove the FPM holder sub assy. 1 from the base plate assy. 4.
  • Page 65: Removal Of Spring

    Modules Feed and bobbin module Removal of Spring 1. Remove the spring Removal of Feed bar Retaining ring CS4 1. Remove the retaining rind CS4, and then remove the polyester slider 1, the feed bar 2 and the polyester slider 3 from the feed arm A assy. Removal of Vertical adjuster screw assy.
  • Page 66: Removal Of Drop Knob

    Modules Feed and bobbin module Removal of Drop knob Retaining ring E3 1. Remove the 3 retaining rings E3. 2. Pull the vertical feed shaft 1, and then remove the washer plain 2, the and the vertical lever 3. spring 3.
  • Page 67: Removal Of Needle Plate Supporter Shaft B

    Modules Feed and bobbin module Removal of Needle plate supporter shaft B 1. Remove the hook 2 of the feed arm supporter 1. 2. Remove the nut 1 M3 3. 3. Remove the needle plate supporter shaft B 4 from the base plate assy. 4.
  • Page 68: Removal Of Timing Pulley D

    Modules Feed and bobbin module Removal of Timing pulley D 1. Remove the 2 screws 1, and then remove the timing pulley D 1 from the lower shaft assy. 2. Removal of Lower shaft bushing Retaining ring E6 1. Remove the retaining ring E6, and then lower shaft bushing 1 from the lower shaft assy.
  • Page 69: Removal Of Lower Shaft Assy

    Modules Feed and bobbin module Removal of Lower shaft assy. 1. Remove the lower shaft assy. 1 from the base plate assy. 2. Remove the 2 screws 1, and then remove the set collar 2. Removal of Feed arm A assy. 1.
  • Page 70: Removal Of Feed Arm B Assy

    Modules Feed and bobbin module Removal of Feed arm B assy. CS Retaining ring CSTW-3.5 1. Remove the retaining ring CSTW-3.5, and then remove the feed arm B assy. 1 and the polyester slider 2 from the feed arm A assy. 3. Removal of Feed adjuster assy.
  • Page 71 2 - 54...
  • Page 72: Assembly

    Assembly When disassembly and assembly are performed, make adjustments according to "4 Adjustments." Main unit Base plate and handle..... 3 - 2 Needle bar, presser mechanism / upper shaft mechanism ....3 - 5 Feed mechanism ......3 - 10 Bobbin winder mechanism .... 3 - 13 Thread tension mechanism ...
  • Page 73: Main Unit Base Plate And Handle

    Main unit Base plate and handle Base plate and handle location diagram 3 - 2...
  • Page 74: Attachment Of Handle

    Main unit Base plate and handle Attachment of Handle 1. Set the handle 1 to the handle holder 2, and then insert the 2 handle shafts 3. 2. Insert the 2 polyester sliders 4 into the handle shaft 3, and then attach the retaining ring E4.
  • Page 75: Attachment Of Inlet Assy

    Main unit Base plate and handle Attachment of Inlet assy. 1. Attach the inlet assy. 1 to the base plate with the screw 1. *Key point • Check that the boss part of the inlet assy. 1 engaged with the positioning hole of base plate.
  • Page 76: Needle Bar, Presser Mechanism / Upper Shaft Mechanism

    Main unit Needle bar, presser mechanism / upper shaft mechanism Needle bar, presser mechanism / upper shaft mechanism location diagram 3 - 5...
  • Page 77: Needle Bar, Presser Mechanism / Upper Shaft Mechanism

    Main unit Needle bar, presser mechanism / upper shaft mechanism Attachment of Plate spring 1. Attach the plate spring 1 from the front of the arm bed with the 2 screws 2. Attach the adjusting screw 2 from the back of the arm bed. *Key point •...
  • Page 78: Attachment Of Needle-presser Module

    Main unit Needle bar, presser mechanism / upper shaft mechanism Attachment of Needle-presser module 1. Attach the needle-presser module 1 to the arm bed. *Key point • Set in the take-up support shaft 2 to the groove 3 (2 locations) of the arm bed. 2.
  • Page 79: Attachment Of Coaching Clip

    Main unit Needle bar, presser mechanism / upper shaft mechanism Attachment of Coaching clip 1. Bind up the lead wire of the BH switch assy. and the lead wire sub assy. with the band 1. 2. Attach the insulator sheet 2 and the coaching clip 3 to the arm bed with the screw 1.
  • Page 80: Attachment Of Upper Shaft Assy

    Main unit Needle bar, presser mechanism / upper shaft mechanism Attachment of Upper shaft assy. 1. Attach the pulley 1 to the upper shaft assy. 2. 2. Hang the T belt 3 on the upper shaft pulley 4. 3. Insert the shaft of the needle bar crank 5 into the thread take-up counter weight 6, and then attach the upper shaft assy.
  • Page 81: Feed Mechanism

    Main unit Feed mechanism Feed mechanism location diagram 3 - 10...
  • Page 82: Feed Mechanism

    Main unit Feed mechanism Attachment of Feed module 1. Hang the timing pulley D 1 on the T belt 2. 2. Set in the lower shaft bushing 3 to the attaching part 4 of the arm bed. 3. Attach the feed module 5 to the arm bed with the 2 screws 1 and 2. *Key point •...
  • Page 83: Attachment Of Inner Rotary Hook Assy

    Main unit Feed mechanism Attachment of Inner rotary hook assy. 1. Attach the inner rotary hook assy. 1 to the outer rotary hook assy. 2. Attachment of Lower shaft bushing 1. Attach the lower shaft bushing 1 to the arm bed with the screw 1. Torque Taptite, Bind S M4X10...
  • Page 84: Bobbin Winder Mechanism

    Main unit Bobbin winder mechanism Bobbin winder mechanism location diagram 3 - 13...
  • Page 85: Bobbin Winder Mechanism

    Main unit Bobbin winder mechanism Attachment of Bobbin winder assy. 1. Attach the bobbin winder assy. 1 to the arm bed with the 2 screws 1. Torque Taptite, Bind S M4X10 1.47 – 1.96 N·m Assembly of Bobbin winder assy. (Attachment of SW adjust plate) 1.
  • Page 86: Assembly Of Bobbin Winder Assy. (attachment Of Bw Shaft Holder Assy.)

    Main unit Bobbin winder mechanism Assembly of Bobbin winder assy. (Attachment of BW shaft holder assy.) 1. Attach the rubber ring 2 to the BW shaft holder assy. 1. 2. Attach the bobbin winder shaft spring 3 to the top position of the BW shaft holder assy.
  • Page 87: Attachment Of Bobbin Base Assy

    Main unit Bobbin winder mechanism Attachment of Bobbin base assy. 1. Attach the bobbin base assy. 1 to the bobbin winder assy. 2. *Key point • Check that the 2 gullets 3 of the bobbin base assy. 1 engage with the 2 protrusions 4 of the bobbin winder. Assembly of Bobbin base assy.
  • Page 88: Thread Tension Mechanism

    Main unit Thread tension mechanism Thread tension mechanism location diagram 3 - 17...
  • Page 89: Thread Tension Mechanism

    Main unit Thread tension mechanism Attachment of Thread unit L 1. Attach the Thread unit L 1 to the arm bed with the 2 screws 1. *Key point • Check that the thread release plate 2 is on the left side of the thread release lever 3.
  • Page 90: Assembly Of Thread Unit L (attachment Of Thread Catching Spring Case)

    Main unit Thread tension mechanism Assembly of Thread unit L (Attachment of Thread catching spring case) 1. Attach the spring tape 2 to the Thread unit L 1. to the thread catching spring case 3. 2. Attach the spring *Key point •...
  • Page 91: Assembly Of Thread Unit L (attachment Of Thread Tension Dial)

    Main unit Thread tension mechanism Assembly of Thread unit L (Attachment of Thread tension dial) 1. Insert the tension disc A 2, the tension disc B 3, the washer 0, the thread release plate 5, the tension disc washer 6, the washer 7 and the into the shaft of the Thread unit L 1.
  • Page 92: Assembly Of Thread Unit L (attachment Of Thread Guard Cover)

    Main unit Thread tension mechanism Assembly of Thread unit L (Attachment of Thread guard cover) 1. Attach the thread guard cover 1 to the Thread unit L 2. *Key point • Attach it while lifting the section 4 of the thread guard cover 1 to get over the boss 3 of the Thread unit L 2.
  • Page 93: Electrical Parts And Main Motor

    Main unit Electrical parts and main motor Electrical parts and main motor location diagram 3 - 22...
  • Page 94: Attachment Of Main Motor Sub Assy

    Main unit Electrical parts and main motor Attachment of Main motor sub assy. 1. Set the main motor sub assy. 1 to the arm bed, and then tighten the 2 screws 1 temporarily. *Key point • Fully tighten the screw after performing "4-6 Adjustment of Motor belt tension".
  • Page 95: Attachment Of Pin Jack Assy

    Main unit Electrical parts and main motor Attachment of Pin jack assy. 1. Insert the pin jack assy. 1 into the insulation cover 2, and then attach the nut 3. *Key point • See the figure to the right for positioning. •...
  • Page 96: Attachment Of Insulation Cover

    Main unit Electrical parts and main motor Attachment of Insulation cover 1. Attach the insulation cover 1 to the arm bed with the 3 screws 1. Torque Screw, Bind M4X8 1.18 – 1.57 N·m Attachment of Power supply assy. 1. Attach the connector 1 to the power supply assy. 2. 2.
  • Page 97: Attachment Of Main Pcb Assy

    Main unit Electrical parts and main motor Attachment of Main PCB assy. 1. Attach the shutter cover 1 to the arm bed with the 2 screws 1. *Key point • Check that the hook 2 of the shutter cover 1 hang on the handle holder 3.
  • Page 101: Main Parts

    Main unit Main parts Main parts location diagram 3 - 30...
  • Page 102: Main Parts

    Main unit Main parts Attachment of Rear cover assy. 1. Lower the presser lever 1. 2. Attach the rear cover assy. 2 to the arm bed and then hang the hook 3 on the base plate. *Key point • Check that the section 4 get over the presser lever 1. •...
  • Page 103: Assembly Of Rear Cover Assy. (attachment Of Thread Guide Supporting Plate)

    Main unit Main parts Assembly of Rear cover assy. (Attachment of Thread guide supporting plate) 1. Attach the thread guide supporting plate 1 to the rear cover assy. with the screw 1. Torque Taptite, Bind B M3X12 0.39 – 0.78 N·m Assembly of Rear cover assy.
  • Page 104: Assembly Of Rear Cover Assy. (attachment Of Bobbin Presser)

    Main unit Main parts Assembly of Rear cover assy. (Attachment of Bobbin presser) 1. Set the nut 1 M3 1 to the attaching part 2 of the rear cover assy. 2. Attach the bobbin presser 3 with the screw 1. Torque Screw, Pan (S/P washer) M3X20...
  • Page 105: Assembly Of Selecting Panel H Assy. (attachment Of Selecting Dial)

    Main unit Main parts Assembly of Selecting panel H assy. (Attachment of Selecting dial) 1. Attach the dial roller guide 1 to the selecting panel H assy. 2. *Key point • Check that the hook 3 hang on it. 2. Attach the selecting dial 4 to the selecting panel H assy. 2. 3.
  • Page 106: Assembly Of Selecting Panel H Assy. (attachment Of Buttons)

    Main unit Main parts Assembly of Selecting panel H assy. (Attachment of Buttons) 1. Attach the reinforcement stitch button 1, feed adjusting button 2 and the adjusting button 3 to the selecting panel it assy. 4. *Key point • Check that the protrusion of the selecting panel H assy. 4 engaged with the notch of the each button.
  • Page 107: Attachment Of Front Cover Assy

    Main unit Main parts Attachment of Front cover assy. 1. Attach the 2 connectors 1 to the main PCB assy. 2. 2. Attach the front cover assy. 3. *Key point • Check that the hooks 4 (2 locations) hang on the base plate 5 and the hooks 6 (3 locations) hang on the hook attaching part 7.
  • Page 108: Assembly Of Front Cover Assy. (attachment Of Sv Key Top)

    Main unit Main parts Assembly of Front cover assy. (Attachment of SV key top) 1. Attach the SV key top 1 to the front cover assy. *Key point • Check that the hooks 2 (2 locations) of the SV key top 1 is the upper side and it hang on the front cover assy.
  • Page 109: Assembly Of Front Cover Assy. (attachment Of Ssvr Pcb Assy.)

    Main unit Main parts Assembly of Front cover assy. (Attachment of SSVR PCB assy.) 1. Attach the SSVR PCB assy. 1 and the insulator sheet 2 to the front cover assy. with the 2 screws 1. 2. Attach the board presser 3 to the front cover assy. with the screw 2. *Key point •...
  • Page 110: Attachment Of Free Arm Plate

    Main unit Main parts Attachment of Free arm plate 1. Attach the free arm plate 1 to the arm bed with the 2 screws 1. Torque Screw, Bind M4X6 1.18 – 1.57 N·m Attachment of Free arm cover 1. Attach the free arm cover 1 to the free arm plate with the screw 1. Torque Screw, Pan (S/P washer) M4X8...
  • Page 111: Attachment Of Needle Plate B Assy

    Main unit Main parts Attachment of Needle plate B assy. 1. Attach the needle plate B assy. 1. 2. Attach the needle plate cover 2 to the needle plate B assy. 1. Assembly of Needle plate B assy. 1. Attach the slide button 1 to the needle plate B assy. 2. *Key point •...
  • Page 112: Attachment Of Face Plate Assy

    Main unit Main parts Attachment of Face plate assy. 1. Attach the face plate assy. 1 with the screw 1. Torque Screw, Pan (S/P washer) M4X14 0.78 – 1.18 N·m Assembly of Face plate assy. 1. Attach the NT lower thread cutter 1 to the face plate assy. 2. 2.
  • Page 113: Needle-presser Module

    Modules Needle-presser module Needle-presser module breakout diagram 3 - 42...
  • Page 114: Attachment Of Shaft Bushing

    Modules Needle-presser module Attachment of Shaft bushing 1. Attach the shaft bushing 1 to the base holder assy. with the 2 screws 1. Torque Screw, Bind M3X6 0.78 – 1.18 N·m Attachment of Lock nut 1. Attach the lock nut 1 with the screw 1. *Key point •...
  • Page 115: Attachment Of Rubber

    Modules Needle-presser module Attachment of Rubber 1. Attach the rubber 1 to the shaft 2 of the base holder assy. Attachment of Z zigzag cam Retaining ring E3 1. Attach the Z zigzag cam 1 to the shaft 2 of the base holder assy. *Key point •...
  • Page 116: Modules Needle-presser Module

    Modules Needle-presser module Attachment of Z zigzag lever assy. 1. Attach the polyester slider 2 and the Z zigzag lever assy. 3 to the shaft 1 of the base holder assy., and then attach the retaining ring E4. *Key point •...
  • Page 117: Attachment Of Thread Release Lever

    Modules Needle-presser module Attachment of Thread release lever 1. Attach the thread release lever 2 and the spring to the shaft 1 of the base holder assy., and then attach the retaining ring CS4. *Key point • Check that the hook of the spring is the upper side, when set it as shown in the right figure.
  • Page 118: Attachment Of Presser Foot Lifter

    Modules Needle-presser module Attachment of Presser foot lifter Retaining ring E4 1. Attach the presser foot lifter 1 to the shaft 2 of the base holder assy., and then attach the retaining ring E4. *Key point • Push the presser bar clamp 3 to the upper side, and then attach it while pushing the bottom side of the thread release lever 4.
  • Page 119: Attachment Of Needle Holder Shaft A

    Modules Needle-presser module Attachment of Needle holder shaft A 1. Insert the needle holder shaft A 1 to the upper side hole of the needle bar supporter assy., and then insert the shaft 2 into the needle bar supporter assy., the needle holder shaft A 1 and the needle bar supporter assy. *Key point •...
  • Page 120: Attachment Of Threader Hook Assy

    Modules Needle-presser module Attachment of Threader hook assy. 1. Attach the threader hook assy. 1 to the needle bar support assy. 2. *Key point • Check that the hook 3 of the threader hook assy. 1 hang on the groove of the needle bar support assy. 2. Attachment of Needle bar supporter assy.
  • Page 121: Attachment Of Shaft Assy

    Modules Needle-presser module Attachment of Shaft assy. 1. Attach the needle holder block 1 to the needle roller 2 of the needle bar supporter assy. *Key point • Flat surface of the needle holder block 1 is the lower side. 2.
  • Page 122: Assembly Of Needle Bar Assy

    Modules Needle-presser module 16-1 Assembly of Needle bar assy. 1. Attach the needle thread plate 1 to the needle block 2. 2. Attach the needle block 2 to the needle bar 3 with the screw 1. *Key point • When the needle bar 3 groove facing forward, check that the screw 1 is on the right side.
  • Page 123: Attachment Of Needle Bar Crank Rod Assy

    Modules Needle-presser module Attachment of Needle bar crank rod assy. 1. Attach the thread take-up lever 1 to the needle bar crank rod assy. 2 with the screw 1. *Key point • The screw is reverse threaded. 2. Attach the needle bar crank rod assy. 2 to the needle bar block 3. Apply EPNOC AP (N) 0 to the shaft of the needle Small amount bar crank.
  • Page 124: Attachment Of Bh Switch Assy

    Modules Needle-presser module Attachment of BH switch assy. 1. Attach the BH switch assy. 1 to the base holder assy. with the screw 1. *Key point • Check that the boss part 3 of the BH switch holder assy. engaged with the positioning hole 2 of the BH switch assy. •...
  • Page 125: Feed And Bobbin Module

    Modules Feed and bobbin module Feed and bobbin module breakout diagram 3 - 54...
  • Page 126: Feed And Bobbin Module

    Modules Feed and bobbin module Attachment of Feed adjuster assy. 1. Insert the polyester slider 2 and the spring into the shaft of the feed adjuster assy. 1. *Key point • Insert the spring starting with the side having the smaller spring diameter.
  • Page 127: Attachment Of Feed Arm B Assy

    Modules Feed and bobbin module Attachment of Feed arm B assy. Retaining ring CSTW-3.5 1. Attach the polyester slider 2 and the feed arm B assy. 3 to the shaft of the feed arm A assy. 1, and then attach the retaining ring CSTW-3.5. Lubricate the feed arm A assy.
  • Page 128: Attachment Of Lower Shaft Assy

    Modules Feed and bobbin module Attachment of Lower shaft assy. 1. Insert the set collar 2 to the lower shaft assy. 1, and then tighten the 2 screws 1 temporarily. *Key point • Check that the cut surface 3 of the set collar 2 is the out side.
  • Page 129: Attachment Of Bushing Presser B

    Modules Feed and bobbin module Attachment of Bushing presser B 1. Insert the washer, thrust 2 and the lower shaft bushing 3 into the lower shaft assy. 1. 2. Attach the bushing presser B 4 to the base plate assy. with the 3 screws 3.
  • Page 130: Attachment Of Timing Pulley D

    Modules Feed and bobbin module Attachment of Timing pulley D 1. Insert the timing pulley D 1 into the lower shaft assy. and then tighten the 2 screws 1 temporarily. *Key point • Insert it until the timing pulley D 1 hits the retaining ring E6. •...
  • Page 131: Attachment Of Needle Plate Supporter Shaft B

    Modules Feed and bobbin module Attachment of Needle plate supporter shaft B 1. Attach the feed arm supporter 2 to the needle plate supporter shaft B 1. *Key point • Check that the hook part 3 of the feed arm supporter 2 is the lower side.
  • Page 132: Attachment Of Drop Knob

    Modules Feed and bobbin module Attachment of Drop knob 1. Attach the drop knob 1 to the base plate assy. *Key point • Attach it while lifting the section 3 to get over the boss part 2 of the base plate assy. 2.
  • Page 133: Attachment Of Feed Bar

    Modules Feed and bobbin module Attachment of Feed bar Retaining ring CS4 1. Insert the polyester slider 2, the feed bar 3 and the polyester 4 into the feed arm A assy. 1, and then attach the retaining ring CS4. *Key point •...
  • Page 134: Attachment Of Fpm Holder Sub Assy

    Modules Feed and bobbin module Attachment of FPM holder sub assy. 1. Attach the rubber 2 to the shaft of the FPM holder sub assy. 1. 2. Attach the FPM holder sub assy. 1 to the shaft 3 of the base plate assy., and then attach the retaining ring CRS-10.
  • Page 135: Attachment Of F Gear Teeth Alignment

    Modules Feed and bobbin module Attachment of F gear teeth alignment 1. Turn the F pulse motor gear 1 clockwise until the stopper 2 of the F pulse motor gear 1 on it touches the rubber 3. 2. Align the teeth of the feed adjusting assy. 4 with the teeth of the F gear 5, and then mesh it and the F pulse motor gear 1.
  • Page 136: Attachment Of Outer Rotary Hook Assy

    Modules Feed and bobbin module Attachment of Outer rotary hook assy. 1. Insert the outer rotary hook shaft 1 into the spacer 2, the outer rotary hook assy. 3, the washer 6 4, the spacer 5 and the shaft supporter 6, and then attach it with the screw 1.
  • Page 137: Attachment Of Needle Plate A Assy

    Modules Feed and bobbin module Attachment of Needle plate A assy. 1. Attach the needle plate A assy. 1 with the 2 screws 1. Torque Screw 1.18 – 1.57 N·m 22-1 Assembly of Needle plate A assy. 1. Attach the F gear stopper plate 1 to the needle plate A 2 with the screw 1. *Key point •...
  • Page 138 3 - 67...
  • Page 139: Adjustment

    Adjustment Inspection Needle curvature / Tip damage to needle .. 4 - 2 Test Mode Starting test mode........4 - 3 Test mode list.......... 4 - 4 Adjustment Adjustment of Timing belt tension... 4 - 5 Adjustment of Motor belt tension .... 4 - 6 Adjustment of Upper thread tension ..
  • Page 140: Needle Curvature / Tip Damage To Needle

    Inspection Needle curvature / Tip damage to needle 1. Check to be sure that there is no curvature in the needle on a level block (horizontal block). The gap with the block should be even. 2. Touch the tip of the needle to your finger, and check to be sure it does not catch. 4 - 2...
  • Page 141: Starting Test Mode

    Test Mode Starting test mode How to start test mode. • Press the (Start / Stop button) and the (Reverse stitch button) while turning the power on; the buzzer will sound four times, and test mode will start. How to get start in each test mode. •...
  • Page 142: Test Mode List

    Test Mode Test mode list Test mode F (feed) Operation Referen Mode Z (zigzag) operations Adjustment used operations speed ce page 3 point needle drop Whenever the Reverse None It is freely Three point needle 4 - 8 stitch button is pushed, changed with drop adjustment needle position is...
  • Page 143: Adjustment Of Timing Belt Tension

    Adjustment Adjustment of Timing belt tension 1. Remove the front cover. 2. Loosen the pan head screw (S/P washer, M4 x 10) on the tension pulley assembly. 3. 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.
  • Page 144: Adjustment Of Motor Belt Tension

    Adjustment Adjustment of Motor belt tension 1. Remove the front cover. 2. Loosen the 2 upset screw (M4 x 12 DB) in the motor holder. 3. 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 4 - 5 mm.
  • Page 145: Adjustment Of Upper Thread Tension

    Adjustment Adjustment of Upper thread tension 1. Remove the front cover. 2. Raise the presser foot lifter. 3. Turn the thread tension dial to the “ 4 ” position. 4. Pass the Schappe Spun Sewing Thread #60 through the pre-tension => tension disk. 5.
  • Page 146: Adjustment Of Three Point Needle Drop

    Adjustment Adjustment of Three point needle drop 1. Attach the front cover. 2. Press button on the front cover while turning the power on : the buzzer will sound four times. 3. Select the test mode number [3]. 4. Turn the pulley by hand, and insert the tip of the needle into the needle hole. 5.
  • Page 147: Forward And Back Adjustment Of Needle And Presser

    Adjustment Forward and back adjustment of needle and presser 1. Remove the face plate. 2. Turn the pulley by hand, and insert the tip of the needle into the needle hole. 3. Loosen the lock nut. 4. Adjust the needle tip to the front/back center position of the needle hole using the socket set screw (CP, M4 x 12). 5.
  • Page 148: Adjustment Of Clearance Between The Needle And The Rotary Hook Point

    Adjustment Adjustment of Clearance between the needle and the rotary hook point 1. Remove the face plate. 2. Attach the needle #11. 3. Press button on the front cover while turning the power on : the buzzer will sound four times. 4.
  • Page 149: Adjustment Of Needle Bar Rise

    Adjustment Adjustment of Needle bar rise 1. Attach the front cover. 2. Press button on the front cover while turning the power on : the buzzer will sound four times. 3. Select the test mode number [3]. 4. Press five times to the left base line. 5.
  • Page 150: Adjustment Of Needle Bar Height

    Adjustment Adjustment of Needle bar height 1. Remove the face plate. 2. Press button on the front cover while turning power on : the buzzer will sound four times. 3. Select the test mode number [3]. 4. Press five times to the left base line. 5.
  • Page 151: Adjustment Of Needle Interference Left / Right

    Adjustment Adjustment of Needle interference left / right 1. Attach the front cover. 2. Remove the 2 flat screws (M4), and remove the needle plate A. 3. Press button on the front cover while turning the power on : the buzzer will sound four times. 4.
  • Page 152: Adjustment Of Needle Thread Block

    Adjustment Adjustment of Needle thread block 1. Attach a needle. 2. Turn the pulley by hand, and set the needle bar at its highest point. 3. Loosen the socket set screw (FT, M4 x 4). 4. Adjust the height of the needle thread block so that the threading hook passes through the needle hole, and secure with the socket set screw (FT, M4 x 4).
  • Page 153: Adjustment Of Presser Bar Height And Parallel

    Adjustment Adjustment of Presser bar height and parallel 1. Remove the face plate. 2. Raise the presser foot lifter. 3. Turn the pulley so that the feed dog drops below needle plate A. 4. Loosen the stud screw (M5) in the presser bar clamp assy. 5.
  • Page 154: Adjustment Of Inner Rotary Hook (lower Thread) Tension

    Adjustment Adjustment of Inner rotary hook (lower thread) tension 1. Set a bobbin (wound with Schappe Spun Sewing Thread thread #60) in the inner rotary hook. 2. Pull the thread with a tension gauge, and adjust the spring adjusting screw so that it is 0.1- 0.12 N (10 - 12 g). 3.
  • Page 155: Adjustment Of Feed

    Adjustment Adjustment of Feed 1. Attach the front cover. 2. Press button on the front cover while turning the power on : the buzzer will sound four times. 3. Select the test mode number [6]. 4. Press button and run "Feed forward and reverse mode," checking the forward and reverse feed amounts. 5.
  • Page 156: Adjustment Of Bobbin Winder

    Adjustment of Bobbin winder Adjustment (uneven bobbin winding and bobbin winding amounts) 1. Remove the face plate. 2. Loosen the screw (M3 x 10). 3. Move the bobbin winder guide assy. up and down and adjust uneven bobbin winding. 4. Tighten the screw (M3 x 10). ( torque : 0.59 - 0.78N · m) Bobbin winder guide assy.
  • Page 157: Adjustment Of Bw Switch Position

    Adjustment Adjustment of BW switch position 1. Turn the bobbin winder cam, and lay it as shown in the below figure. 2. Loosen the bind screw (M3 x 6) of the SW adjusting plate. 3. The position in the figure to the lower, and move the SW adjusting plate and adjust it so that the gap is 0 - 0.5mm between the SW switch assy.
  • Page 158: Adjustment Of Bh Lever Switch Position

    Adjustment Adjustment of BH lever switch position 1. Raise the presser foot lifter. 2. Set the BH presser two pitches smaller than the maximum length. 3. Attach the BH presser. 4. Lower the presser foot lifter. 5. Lower the BH lever, and set to the BH presser. 6.
  • Page 159: Adjustment Of Front/back, Left/right Position Of Feed Dog

    Adjustment Adjustment of Front/back, left/right position of feed dog 1. Press button on the front cover while turning the power on : the buzzer will sound four times. 2. Select the test mode number [8]. 3. Turn the pulley, and check that the feed dog is center position, and then Turn off the power. 4.
  • Page 160: Adjustment Of Feed Dog Height

    Adjustment Adjustment of Feed dog height 1. Turn the pulley, and bring the feed dog to its highest position. 2. Loosen the nut (M5). 3. Adjust the feed dog height so that it is 0.9 - 1.1 mm from the upper surface of the needle plate A by the amount the vertical adjuster screw assembly is screwed in.
  • Page 161: Adjustment Of Inner Rotary Hook Bracket Position

    Adjustment Adjustment of Inner rotary hook bracket position 1. Set the inner rotary hook in the outer rotary hook. 2. Loosen the pan head screw (S/P washer, M3 x 6) securing the inner rotary hook bracket assy. 3. Adjust the inner rotary hook bracket assy. attachment position so that contact between the inner rotary bracket assy.
  • Page 162 4 - 24...
  • Page 163: Failure Investigation For Electronic Parts

    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 Power does not come on..........5 - 3 Pulse motors do not return to starting point ..... 5 - 4 Pattern cannot be selected..........
  • Page 164: Error Message List

    Failure Investigation for Electronic Parts Error message list Error display Cause (5 - 18) Abnormal rotation in main motor. Key pressed continually with power ON (5 - 19) (operation system SW). (5 - 20) Key pressed continually with power ON (operation panel SW).
  • Page 165: Power Does Not Come On

    Failure Investigation for Electronic Parts Power does not come on When the power is turned ON, the buzzer does not sound With the power cord plugged into an outlet, Replace the inlet assy. is the voltage between pins 1 & 2 on the inlet assy.
  • Page 166: 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. • Needle up: Z pulse motor return to starting point • Needle down: F pulse motor returns to starting point Is the connector of the Z pulse motor Reconnect it correctly correctly connected to CN8 of the main...
  • Page 167: Pattern Cannot Be Selected

    Failure Investigation for Electronic Parts Pattern cannot be selected Pattern cannot be selected Is the connector of the operation PCB Reconnect it correctly assy. correctly connected to CN4 of the main PCB assy.? Attach the operation PCB Is the shutter of the selecting shutter in assy.
  • Page 168: Main Motor Does Not Turn

    Failure Investigation for Electronic Parts Main motor does not turn Main motor does not turn Adjust the assy. of upper shaft Does the pulley turn easily? Is the main motor connector correctly Reconnect it correctly connected to CN401 of the power supply PCB assy.? Is the main motor resistance 2 –...
  • Page 169 Failure Investigation for Electronic Parts Main motor does not turn From previous page Is the FFC of the operation PCB Reconnect it correctly assy. correctly connected to CN4 of the main PCB assy.? Are the resistance values for the Stop/Start switch, reverse switch, raise needle switch and the thread Replace the SS-VR PCB assy.
  • Page 170: Main Motor Rotation Abnormal

    Failure Investigation for Electronic Parts Main motor rotation abnormal • Main motor rotational variance • Does not reach maximum speed • Speed cannot be adjusted Is the connector of the main motor Reconnect it correctly correctly connected to CN401 of the power PCB assy.? Is the power lead wire assy.
  • Page 171: 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 pins 1 & 2 and pins 3 &...
  • Page 172: 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 the BH lever Adjust the BH lever switch connector pins 4 & 5 normal? •...
  • Page 173: 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. Is the display of LCD nomally turned Set the switch correctly on and off with eatch switch? And is there a click feeling of each Replace the operation PCB switch?
  • Page 174: Problems With Vertical Needle Movement And Reverse Stitching

    Failure Investigation for Electronic Parts Problems with vertical needle movement and reverse stitching Problems with vertical needle movement and reverse stitching Is the connector of the SS-VR PCB assy. correctly connected to CN1 of Reconnect it correctly the main PCB assy.? Are the resistance values for the Stop/start switch, reverse switch, and raise needle switch normal?
  • Page 175: 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 connector of the FC jack assy. Reconnect it correctly correctly connected to CN3 of the main PCB assy.? Is the resistance between the FC jack assy.
  • Page 176: Lcd Display Is Not Normal

    Failure Investigation for Electronic Parts LCD display is not normal No LCD display Is the FFC of the single light guide Reconnect it correctly assy. correctly connected to CN1 of the operation PCB assy.? Is the connector of the single light guide assy.
  • Page 177: Lcd Light Does Not Come On

    Failure Investigation for Electronic Parts LCD light does not come on LCD light does not come on Is the connector of the single light guide assy. correctly connected to CN3 Reconnect it correctly of the operation PCB assy.? Is the connector of the operation PCB assy.
  • Page 178: Bobbin Winding Cannot Be Done

    Failure Investigation for Electronic Parts Bobbin winding cannot be done Bobbin winding cannot be done. Adjust the bobbin winder Is the bobbin winder mechanism mechanism for correct assembled and attached correctly? assembly and attachment Is the connector of the BW-F SW assy. correctly connected to CN1 of the main Reconnect it correctly PCB assy.?
  • Page 179: The Lamp At Hand Does Not Have Light

    Failure Investigation for Electronic Parts The lamp at hand does not have light The lamp at hand does not have light Is the connector of the SS-VR PCB Reconnect it correctly assy. correctly connected to CN5 of the main PCB assy.? Is the connector of the LED lamp R Reconnect it correctly correctly connected to CN3 of the...
  • Page 180: Error Is Displayed

    Failure Investigation for Electronic Parts Error is displayed "F1" is displayed After replaceing the power supply PCB assy., start test mode and select test mode "11". Next, press the BK key. "F1" Error mode is canceled again. error mode is canceled. When the power is once turned off and is switched on again, is it displayed as "F1"?
  • Page 181 Failure Investigation for Electronic Parts Error is displayed "F2" is displayed Is one of the SS key, NP key, and BK Replace the SS-VR PCB assy. key stuck in a pressed down condition? Replace the main PCB assy. Release the switch that is stuck 5 - 19...
  • Page 182 Failure Investigation for Electronic Parts Error is displayed "F3" is displayed Is one of the operation panel keys Replace the operation PCB assy. (Pattern selection key etc.) stuck in a pressed down condition? Replace the main PCB assy. Release the switch that is stuck 5 - 20...
  • Page 183 Failure Investigation for Electronic Parts Error is displayed "F4" is displayed Are the foot controller jack assy. lead Replace the foot controller jack wires broken? assy. Correctly connect the foot Is the foot controller jack assy. correctly controller jack assy. to the main connected to the main PCB assy.
  • Page 184 Failure Investigation for Electronic Parts Error is displayed The error message "F5" or "F6" is displayed on the screen Is the main PCB assy. assembled to Attach the main PCB assy. to the correct position of the shutter the correct position of the cover shutter cover Is the timing shutter of the upper shaft...
  • Page 185 Failure Investigation for Electronic Parts Error is displayed "F7" is displayed Is the SS-VR PCB assy. correctly Connect the SS-VR PCB assy. connected to the main PCB assy. to CN1 on the main PCB assy. (CN1)? correctly Is "F7" still displayed even when Replace the SS-VR PCB assy.
  • Page 186 Failure Investigation for Electronic Parts Error is displayed "F8" is displayed Is the voltage between pins 3 & 4 of Replace the power supply assy. CN5 on the main PCB assy. 30 V DC? Replace the main PCB assy. "F9" is displayed Replace the main PCB assy.
  • Page 187: Repair Manual

    Repair Manual 6 - 1...
  • Page 188 Repair Manual Problem Primary factors and causes Repair method Items for Inspection method Inspection and standards Stitch skipping Needle tip damaged while Needle replacement Needle curvature Remove the needle, Thread abrasion sewing place on level block Thread breakage Needle catches and bends (horizontal block) and Seam unevenness before or after sewing...
  • Page 189 Repair Manual Problem Primary factors and causes Repair method Items for Inspection method Inspection and standards Stitch skipping, Bad needle interference Adjust needle interference Needle and tip Lightly press the lower thread abrasion adjustment (4-10) part (cover part) of the Thread breakage SS button while running Loose needle interference...
  • Page 190 Repair Manual Problem Primary factors and causes Repair method Items for Inspection method Inspection and standards Even if the drop Drop knob damage Replace drop knob (2-49) (3-61) Drop function With the needle bar in knob is returned to the top position and the Operation trouble of virtical lever Adjust vertical lever operation the left, the feed drop lever to the right,...
  • Page 191 Repair Manual Problem Primary factors and causes Repair method Items for Inspection method Inspection and standards 10 Sewing sounds Operating noise Check that there is no Inappropriate abnormal noise at fast, sounds middle and slow speed in 3 point drop (test •...
  • Page 192 Repair Manual Problem Primary factors and causes Repair method Items for Inspection method Inspection and standards 11 Threading not Thread pushed out at the hook Threading Confirm that when possible. end. function threading is carried out with Schappe Spun • Vertical slippage in needle Adjust needle thread block Sewing Thread #60 / thread block...
  • Page 193 Repair Manual Problem Primary factors and causes Repair method Items for Inspection method Inspection and standards 13 Actual sewing Actual sewing Check that the needle • Needle Needle breaks. (straight line / does not break during breakage zigzag) actual sewing. •...
  • Page 194 Repair Manual Problem Primary factors and causes Repair method Items for Inspection method Inspection and standards • Seam Seam unevenness. Actual sewing Check that stitches are unevenness (straight line / not uneven during • Bad presser position Adjust presser bar height (4-15) zigzag) actual sewing.
  • Page 195 Repair Manual Problem Primary factors and causes Repair method Items for Inspection method Inspection and standards 15 Bobbin winder Bad BW switch Replace BW switch Bobbin winder Operate the bobbin shaft not turning (2-24) (3-15) function winder with Schappe Spun Sewing Thread BW switch connector Plug connector in #60, and confirm that...
  • Page 196 6 - 10...
  • Page 197: Special Instructions Of Wiring

    Special Instructions of Wiring Wiring of needle bar module ....7 - 2 Wiring of feed / rotary module....7 - 4 Wiring of power module ......7 - 5 Wiring of bobbin winder assy....7 - 10 Wiring of main PCB assy.......7 - 11 Wiring of front cover.......7 - 12 7 - 1...
  • Page 198: Wiring Of Needle Bar Module

    Special Instructions of Wiring Wiring of needle bar module 1. Wiring on left side of needle-presser module Secure the lead wires a clip. (bend the tip of a clip in the inside of the arm bed.) Secure the lead wires so that the head part of the The lead wires should be positioned band becomes it inward.
  • Page 199 Special Instructions of Wiring Wiring of needle bar module 2. Wiring on right upper side of needle-presser module The PF lead wires should not be loose. Secure the lead wires with a band. The lead wires should be positioned above the rib. Pass the lead wires to the gullet of the arm bed.
  • Page 200: Wiring Of Feed / Rotary Module

    Special Instructions of Wiring Wiring of feed / rotary module 1. Wiring on front side of main body FP motor Main motor 2. Wiring FP motor lead wire and main motor lead wire Secure the lead wires with a band. FP motor lead wire 45 degrees Ferrite core...
  • Page 201: Wiring Of Power Module

    Special Instructions of Wiring Wiring of power module 1. Wiring on front side of insulation cover Hang the FC lead Pass the FC lead wires between wires on the hook. the ribs (2 locations). Ferrite cover Insulation cover The ferrite core should not go Cross the FC lead wires, out of the broken line outside.
  • Page 202 Special Instructions of Wiring Wiring of power module 3. Wiring of PW SW assy. and power supply assy. Insulation cover Power supply assy. PW SW lead wire B [ I ] side of the PW SW. PW SW lead wire A [ O ] side of the PW SW.
  • Page 203 Special Instructions of Wiring Wiring of power module 5. Wiring of power supply assy. and insulation cover Insert the power lead wire into the cylinder of the insulation cover, and attach the power supply assy. to the insulation cover with the screw. Insulation cover Power lead wire Power supply assy.
  • Page 204 Special Instructions of Wiring Wiring of power module 7. Wiring of inlet assy. and insulation cover Secure the inlet assy. with a clip. Inlet assy. 8. Wiring on back side of main body (upper side of power module) Insert the main motor lead wire into the cylinder of the insulation cover from the back side of main body, and insulation it into the...
  • Page 205 Special Instructions of Wiring Wiring of power module 9. Wiring on front side of main body (lower side of main PCB) Connector Hang the FP motor lead wire on the hook of the shutter cover. FC lead wire Pass the FC lead Power lead wire wire to the lower side of the FP motor lead...
  • Page 206: Wiring Of Bobbin Winder Assy

    Special Instructions of Wiring Wiring of bobbin winder assy. 1. Wiring on left side of bobbin winder sub assy. Sutter cover BW lead wire Pull the BW lead wire from the gap on the side of shutter cover to the sront side of main body. 2.
  • Page 207: Wiring Of Main Pcb Assy

    Special Instructions of Wiring Wiring of main PCB assy. 1. Wiring on front side of main PCB assy. Pass the ZP motor lead wire to the lower side of the power lead wire, and insert it into the connector. ZP motor lead wire Secure the lead wire with a band.
  • Page 208: Wiring Of Front Cover

    Special Instructions of Wiring Wiring of front cover 1. Wiring on back side of selecting panel assy. Single light guide assy. Backlight lead wire Boss A Pass the backlight lead wire between the boss A and the boss B. Boss B Selecting panel LCD lead wire Backlight lead wire...
  • Page 209 Special Instructions of Wiring Wiring of front cover 2. Wiring on inside of front cover Insert the connector of the LED lead wire into SS-VR PCB assy. the connector of the SS-VR PCB assy. LED lead wire Pass the LED lead wire to front of the SS-VR PCB assy.
  • Page 210 Special Instructions of Wiring Wiring of front cover 4. Assembly of front cover Operation lead wire Main PCB assy. SS-VR lead wire Main PCB assy. Operation lead wire SS-VR lead wire 7 - 14...
  • Page 211 09F07HF885V11...

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