Brother NX600 Service Manual
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Brother NX600 Service Manual

Computerized sewing machine
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Summary of Contents for Brother NX600

  • Page 3: Outline Of Mechanism

    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 Main motor control ................1 - 6 Pattern generator and thread cutter ..........1 - 7 Operation of other electronic components ........1 - 8 Using the threader ................1 - 9 2.

  • Page 4: Table Of Contents

    Thread guide cover removal ......................2 - 18 Thread release holder assy. F removal ..................2 - 18 PF-F SW assy. removal .........................2 - 19 Thread guide shutter removal ......................2 - 19 Tension releaser link removal .......................2 - 19 Plate assembly removal .........................2 - 20 Thread guide removal ........................2 - 20 AT pulse motor removal ........................2 - 20 Thread tension gear removal ......................2 - 20...
  • Page 5 Needle bar supporter assy. removal .....................2 - 38 Hook release plate removal ......................2 - 38 Threader hook assy. disassembly ....................2 - 38 Lever AB assy. removal .........................2 - 38 Lever AB assy. disassembly ......................2 - 39 Shaft bushing A removal .......................2 - 39 Thread guide plate removal ......................2 - 39 Thread take-up assy.
  • Page 6 Needle bar, presser mechanism / upper shaft mechanism .......3 - 2 Plate spring attachment ........................3 - 3 Wire assy. attachment (lifter assy.) ....................3 - 3 Needle-presser module attachment ....................3 - 4 Upper shaft pulley attachment .......................3 - 4 Pulley attachment ..........................3 - 5 Upper shaft assy.
  • Page 7 Base plate cover attachment ......................3 - 28 Knee lifter assy. attachment ......................3 - 28 Base plate attachment ........................3 - 29 Wire assy. and knee lifter assy. attachment ................3 - 29 Power supply unit F attachment ....................3 - 29 PBC unit LED lamp-FL attachment ....................3 - 30 Wire clip attachment ........................3 - 30 Lead assy.
  • Page 8 Needle bar assembly ........................3 - 53 Needle bar assembly attachment ....................3 - 54 Release guide plate attachment ....................3 - 54 Release lever attachment ......................3 - 55 Lock nut attachment ........................3 - 55 Spring (for needle bar supporter assy.) attachment ..............3 - 56 Presser dial attachment .........................3 - 57 Zigzag adjusting nut attachment ....................3 - 58 Spring-Z attachment ........................3 - 58...
  • Page 9 Needle curvature ....................4 - 2 Tip damage to needle ..................4 - 3 Test Mode......................4 - 4 Timing belt tension adjustment ................4 - 6 Motor belt tension adjustment ................4 - 7 Needle bar rise adjustment ................4 - 8 Needle bar height adjustment ................4 - 9 Three point needle drop adjustment ..............4 - 10 Needle interference left/right adjustment.
  • Page 10 Cannot sew button holes well................5 - 9 Stitch length and zigzag width cannot be done by manual adjustment..................5 - 10 Problems with vertical needle movement and reverse stitching ......5 - 11 Does not operate when the foot controller is used..........5 - 12 Thread tensioning does not go well ..............5 - 13 Thread cutter does not work normally .............5 - 14 LCD display is not normal ................5 - 15...
  • Page 11 Outline of Mechanism Main Mechanisms ............ 1 - 2 Driveline ..............1 - 3 Positions of electronic components......1 - 4 Control system block diagram........1 - 5 Main motor control ............ 1 - 6 Pattern generator and thread cutter ......1 - 7 Operation of other electronic components ....

  • Page 12: Main Mechanisms

    Outline of Mechanism Main Mechanisms Bobbin winder mechanism Thread guide mechanism Needle bar / Upper shaft Presser mechanism mechanism Side feed mechanism Rotary hook drive mechanism Thread cutting mechanism Feed / Rotary hook mechanism 1 - 2...

  • Page 13: 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 14: Positions Of Electronic Components

    Outline of Mechanism Positions of electronic components SW ASSY:BW-F Power supply unit,f PCB ASSY:SS-VR AT pulse motor PCB ASSY:NP SW ASSY:PF-F LCD module Z pulse motor (LCD panel) BH change PCB ASSY: switch assy MAIN BH switch PCB ASSY: lever OPERATION PCB UNIT: Power switch...

  • Page 15: Control System Block Diagram

    Outline of Mechanism Control system block diagram Power supply unit AC power Switching power supply Inlet supply PCB UNIT: Main motor drive circuit Main motor LED LAMP-FL Z pulse F pulse C pulse S pulse LED (white) motor motor motor motor PCB ASSY:MAIN Pulse motor...

  • Page 16: Main Motor Control

    Outline of Mechanism Main motor control The sewing machine motor must run stably at low speeds and high speeds even with load temperature and other changes. Therefore, the main motor is run by PMW control that makes use of FETs. Motor voltage waveform Approx.

  • Page 17: Thread Cutter

    Outline of Mechanism Pattern generator and thread cutter Pattern generator Conventionally, a cam that has the mechanical data cut into it has been used to move the adjuster and needle bar and generate the pattern. However, this sewing machine operates an F pulse motor and Z pulse motor, moves the feed adjuster and needle bar and generates the pattern using data (532 types) stored in internal CPU memory.

  • Page 18: 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 19: 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 20 1 - 10...

  • Page 21: Disassembly

    Disassembly Main unit Main parts........2 - 2 Electrical parts and motors ....2 - 9 Thread tension mechanism ... 2 - 16 Bobbin winder mechanism .... 2 - 22 Rotary hook drive mechanism / Feed and bobbin mechanism / Cutter assy.
  • Page 22 Main unit Main parts location diagram 2 - 2...

  • Page 23: Main Unit Main Parts

    Main unit Main parts Accessory table removal 1. Remove accessory table 1. 2. Remove the accessory table door from the accessory table 1. Top cover removal 1. Remove top cover 1. *Key point • Push the attached part toward the inside and remove. Face plate removal and disassembly 1.
  • Page 24 Main unit Main parts Front thread guard cover removal. 1. Remove the screw 1, and remove the front thread guard cover 1. Start movie clip (CD-ROM version only) Needle plate B removal and disassembly 1. Remove the needle plate cover 1. 2.
  • Page 25 Main unit Main parts Front cover removal 1. Remove the screw 1. 2. Remove the screws 2 (two). 3. Loosen the screw 3. 4. Undo the hooks 1 from the center of the front cover (2 locations), and remove the rear cover. 5.
  • Page 26 Main unit Main parts Front cover disassembly (operation PCB assy. disassembly) 1. Slide the stopper 1 up. 2. Unplug the LCD panel flat cable 2. 3. Unplug the CN3 connector 3. 4. Remove the screws 1 (four), and remove the operation F3 PCB assy. and rubber keys.
  • Page 27 Main unit Main parts Front cover disassembly (spool pin removal) 1. Remove the screws 1 (two), and remove the thread bobbin cover 1. 2. Remove the screw 2, and remove the spool pin holder assy. 2 and the spool pin 3. Start movie clip (CD-ROM version only) Front cover disassembly (SS-VR F PCB assy.
  • Page 28 Main unit Main parts *Top view Front cover disassembly (SV keytop removal) 1. Remove the SV keytop 1. *Key point • Insert a standard screwdriver between 1 and 2, and push the SV keytop 1 out on the front side. 2.
  • Page 29 Main unit Electrical parts and motors location diagram 2 - 9...

  • Page 30: Electrical Parts And Motors

    Main unit Electrical parts and motors Power supply unit F removal 1. Unplug all of the connectors on the main PCB assy. 1. 2. Remove the main motor connector 2. 3. Disconnect the inlet assy. connector 3. 4. Remove the screws 1 (three), and remove power supply unit F 4. Start movie clip (CD-ROM version only) Assy.
  • Page 31 Main unit Electrical parts and motors PCB Unit LED lamp FL removal 1. Disconnect the bands on the back of the arm bed (3 locations). 2. Remove the screw 1, and remove PCB unit LED lamp FL 1. Start movie clip (CD-ROM version only) Base plate sub assy.
  • Page 32 Main unit Electrical parts and motors Inlet assy removal 1. Remove the screw the screw 1, and remove the inlet assy. 1. 2. Remove base rubber A (four). 3. Remove the regulator adjusting screw assy. 2. Timing belt (motor belt) removal 1.
  • Page 33 Main unit Electrical parts and motors Main motor assembly disassembly 1. Remove the screws 1 (two), and remove the main motor assembly 1 and the motor spacer presser 2. 2. Remove the fender rubber 3 from the motor holder 4. 3.
  • Page 34 Main unit Electrical parts and motors Side feed mechanism disassembly 1. Remove screw 1 and screw 2, and remove plate spring B 1, the side feed adjust plate 2, washer, side feed arm assy. 3 and plate spring A 4. 2.
  • Page 35 Main unit Electrical parts and motors main PCB assy. removal 1. Remove the screw 1 and the screws 2 (two), and remove the main PCB assy. 1. NP PCB assy. removal 2, 3 1. Remove the screws 1 (three), and remove the PCB holder 1. 2.
  • Page 36 Main unit Thread tension mechanism location diagram 2 - 16...

  • Page 37: Thread Tension Mechanism

    Main unit Thread tension mechanism Thread tension assy removal *Top view 1. Remove 2. Remove the screws 1 (two), and remove the thread tension assy 1. Start movie clip (CD-ROM version only) Retaining ring E2 Tension plate removal 1. Remove retaining ring E2, and remove the 2.

  • Page 38: Thread Guide Cover Removal

    Main unit Thread tension mechanism Thread guide removal 1. Remove the screws 1 (two), and remove the thread guide assy. 1. 2. Remove the screw 2, and remove the thread guide cover 2. Thread guide cover removal 1. Remove the thread guide cover 1. *Key point •...

  • Page 39: Pf-F Sw Assy. Removal

    Main unit Thread tension mechanism PF-F SW assy. removal 1. Remove the screw 1, and remove the PF-F SW assy. 1 and the presser switch holder 2. Start movie clip (CD-ROM version only) Thread guide shutter removal *Bottom view Retaining ring E3 1.

  • Page 40: Plate Assembly Removal

    Main unit Thread tension mechanism Plate assembly removal 1. Remove the screw 1, and remove the plate assembly 1. Thread guide removal 1. Remove the screws 1 (two), and remove the thread guide 1. AT pulse motor removal 1. Remove the screws 1 (two), and remove the AT pulse motor 1. Thread tension gear removal Retaining ring E3 1.

  • Page 41: Tension Disk Removal

    Main unit Thread tension mechanism Tension disk removal 1. Remove the screw 1, and remove initial adjustment plate 1. 2. Remove the rubber from the initial adjustment plate 1. 3. Loosen the thread tension adjusting screw 2, and remove the tension plate assy.

  • Page 42: Bobbin Winder Mechanism

    Main unit Bobbin winder mechanism location diagram 2 - 22...

  • Page 43: Bobbin Winder Mechanism

    Main unit Bobbin winder mechanism Bobbin winder cover removal 1. Remove the bobbin base 1. 2. Remove the screw 1, and remove the bobbin winder cover 2. Start movie clip (CD-ROM version only) Bobbin base disassembly 1. Remove the bobbin thread cutter holder 1. 2.

  • Page 44: Bobbin Winder Mechanism

    Main unit Bobbin winder mechanism Bobbin winder assembly removal 1. Remove the screw 1, and remove the bobbin winder assembly 1. BW holder supporter removal 1. Remove the screw 2, and remove the BW holder supporter 1. BW-F SW assy. removal 1.

  • Page 45: Bw Shaft Holder Assembly Removal

    Main unit Bobbin winder mechanism BW shaft holder assembly removal 1. Move the BW shaft holder assembly 1 to the right 2 (bobbin winding ON). 2. Remove 3. Remove the BW shaft holder assembly 1. Start movie clip (CD-ROM version only) Bobbin winder shaft stopper removal 1.

  • Page 46: Rotary Hook Drive Mechanism

    Main unit Rotary hook drive mechanism / Feed and bobbin mechanism / Cutter assy. location diagram 2 - 26...

  • Page 47: Cutter Assy. Location Diagram

    Rotary hook drive mechanism / Feed and bobbin Main unit mechanism / Cutter assy. location diagram Leadline guide holder removal. 1. Remove the screws 1 (two), and remove the leadline guide holder 1. Start movie clip (CD-ROM version only) Thread cutter module removal Arm bed base 1.

  • Page 48: Joint Removal

    Rotary hook drive mechanism / Feed and bobbin Main unit mechanism / Cutter assy. location diagram Joint removal 1 (two) 1. Remove the screws 1 (two), and remove the joint 1 and the lower shaft bushing 2. Timing pulley D removal 1 (three) Retaining ring E6 1.

  • Page 49: Needle Bar, Presser Mechanism

    Main unit Needle bar, presser mechanism / Upper shaft mechanism location diagram 2 - 29...

  • Page 50: Upper Shaft Mechanism

    Main unit Needle bar, presser mechanism / Upper shaft mechanism Upper shaft removal 1(four),2(two) 1. Remove the screws 1 (four) and the screws 2 (two), and slide the fixed joint 1 to the right. 2. Remove the screw 3, and detach the bushing presser 2. 3.

  • Page 51: Needle-Presser Module Removal

    Main unit Needle bar, presser mechanism / Upper shaft mechanism Needle-presser module removal *Rear view 1. Remove the screw 1. 2. Remove the screws 2 (four), and detach presser plate A 1 and presser plate B 2. 3. Remove the needle-presser module 3. 4.

  • Page 52: Plate Spring Removal

    Main unit Needle bar, presser mechanism / Upper shaft mechanism Plate spring removal *Rear view 1. Remove the adjusting screw 1 2. Remove the screws 1 (two), and remove the plate spring 1. *Front view 2 - 32...

  • Page 53: Needle-Presser Module

    Modules Needle-presser module breakout diagram 2 - 33...

  • Page 54: Modules Needle-Presser Module

    Modules Needle-presser module BH switch assy. removal 1. Remove the screw 1, and detach the BH switch assy. 1. Presser feed holder assy. removal 1. Remove the screw 1, and detach the presser feed holder assy 1. Adjusting plate assy. removal 1.

  • Page 55: Spring-Z Removal

    Modules Needle-presser module Spring-Z removal 1. Remove Zigzag adjusting nut removal 1. Remove the screw 1, and remove the zigzag adjusting nut 1. Lever A spring / spring / needle bar hook stand spring removal 1. Remove Presser dial removal Retaining ring E4 1.

  • Page 56: Lock Nut Removal

    Modules Needle-presser module Lock nut removal 1. Remove the lock nut 1 and the screw 1. Release guide plate removal 1. Remove screws 1 (two), and remove the release guide plate 1. Needle bar assy. removal 1. Remove screws 1 (two). 2.

  • Page 57: Needle Bar Assy. Disassembly

    Modules Needle-presser module Needle bar assy. disassembly 1. Remove the screw 1, and detach needle bar thread guide 1. 2. Remove the screw 2, and remove the needle block 2. 3. Remove the needle thread plate 3 from the needle block 2. Release lever removal 1.

  • Page 58: Needle Bar Supporter Assy. Removal

    Modules Needle-presser module Needle bar supporter assy. removal 1. Remove the screw 1, and remove the plate 1. 2. Remove the screw 2, and remove the shaft 2. 3. Remove the shaft 3. 4. Remove the needle bar supporter assy. 4. *Key point •...

  • Page 59: Lever Ab Assy. Disassembly

    Modules Needle-presser module Retaining Lever AB assy. disassembly ring E3 1. Remove retaining ring E3, and remove lever B 2 and from the lever A assy. 1. 2. Remove the cap 3 from lever B 2. Shaft bushing A removal 1.

  • Page 60: Thread Take-Up Counter Weight Removal

    Modules Needle-presser module Thread take-up counter weight removal 1(two) 1. Remove the screws 1 (two), and thread take-up counter weight 1, thrust washer, unit shaft 2 and thrust washer. 2. Remove retaining ring E6 from the unit shaft 2. Start movie clip (CD-ROM version only) Retaining ring E6 Retaining Presser foot lifter removal...

  • Page 61: Thread Release Lever Assy. Removal

    Modules Needle-presser module Thread release lever assy. removal Retaining ring E3 1. Remove retaining ring E3. 2. Remove the thread release lever assy. 1 and the polyester slider. Remove the Z zigzag cam and shaft. Retaining ring E2 1. Remove retaining ring E2, and remove the Z zigzag cam 1. 2.

  • Page 62: Presser Bar Removal

    Modules Needle-presser module Presser bar removal 1. Remove the screw 1, and remove the presser bar 1, presser bar clamp assy. 2, and presser spring supporter. 2. Remove the screw 2, and detach the presser bar bushing 3. Start movie clip (CD-ROM version only) Thread take-up lever link removal 1.

  • Page 63: Presser Dial Gear Removal

    Modules Needle-presser module Presser dial gear removal 1. Remove the presser dial gear shaft assy. 1, and remove the presser dial gear 2. 2 - 43...

  • Page 64: Feed And Bobbin Module

    Modules Feed and bobbin module breakout diagram 2 - 44...

  • Page 65: Feed And Bobbin Module

    Modules Feed and bobbin module Needle plate A removal 1. Remove the screws 1 (two), and remove needle plate A 1. Needle plate A disassembly 1. Remove the screws 1 (two), and remove the F gear stopper plate 1 and the stopper plate 2.

  • Page 66: F Pulse Motor Assembly Removal

    Modules Feed and bobbin module F pulse motor assembly removal 1. Remove the screw 1 and the screw 2, and detach the and the F pulse motor assembly. Start movie clip (CD-ROM version only) F pulse motor disassembly 1. Remove the screws 1 (two), and remove the F pulse motor (FPMSMJ35- 4840-C) 1.

  • Page 67: Feed Bar Spring Removal

    Modules Feed and bobbin module Feed bar spring removal 1. Remove Feed bar removal 1. Remove the screws 1 (two), and remove the feed bar shaft A 1 (two). 2. Remove the feed bar. Vertical adjusting screw removal 1. Remove the vertical adjusting screw 1. 2.

  • Page 68: Lower Shaft B Assy. Removal

    Modules Feed and bobbin module Lower shaft B assy. removal 1. Remove the screws 1 (two), and remove the joint 1. 2. Remove the screws 2 (two), and remove bushing presser A 2. 3. Remove the lower shaft B assy. 3. 4.

  • Page 69: Feed Arm Assy. Removal

    Modules Feed and bobbin module Feed arm assy. removal *Bottom view 1. Remove the screw 1, and remove the horizontal feed shaft 1 and the polyester slider. 2. Remove the feed arm assy. 3. Remove retaining ring E5 from the horizontal feed shaft 1. Start movie clip (CD-ROM version only) Retaining ring E5 Feed arm assy.

  • Page 70: Feed Adjuster Assembly Removal

    Modules Feed and bobbin module Feed adjuster assembly removal 1. Remove the screws 1 (two), and remove the bushing supporter assy. 1, feed adjuster assembly 2, and polyester slider. Start movie clip (CD-ROM version only) Feed adjuster assembly disassembly 1. Remove , and detach the F gear 1.

  • Page 71: Drop Assy. Removal

    Modules Feed and bobbin module Drop assy. removal 1. Remove the screws 1 (two), and remove the drop assy. 1. Retaining Drop assy. disassembly ring E3 1. Remove the screw 1. 2. Remove retaining ring E3, and remove the vertical feed shaft 1, polyester slider, set screw collar 4 2 and 3.

  • Page 72: Thread Cutter Module

    Modules Thread cutter module breakout diagram 2 - 52...

  • Page 73: Thread Cutter Module

    Modules Thread cutter module Thread cutter frame assy. removal 1. Remove the screws 1 (two), and remove the thread cutter frame assy. 1, collars 2 (two) and polyester slider. Presser plate removal 1. Remove the screw 1, and detach the presser plate and spring plate 1. Pile 4 x 8 removal 1.

  • Page 74: Thread Hook Assy. Disassembly

    Modules Thread cutter module Thread hook assy. disassembly 1. Remove retaining ring E4, and remove the thread hook assy. 1, polyester slider 2 and NT lower thread cutter 3. 2. Detach the spacer 4. Retaining ring E4 Rubber removal Retaining ring E2 1.

  • Page 75: Thread Cutter Lever Assy. Disassembly

    Modules Thread cutter module Thread cutter lever assy. disassembly 1. Remove the screw 1, and remove the thread cutter lever gear 1. Idle gear A and idle gear B removal Retaining ring E2 1. Remove the retaining ring E2, and remove idle gear A 1, idle gear B 2 and the spring 3.
  • Page 76 Modules Thread cutter module 2 - 56...

  • Page 77: Assembly

    Assembly When disassembly and assembly are performed, make adjustments according to "4 Adjustments." Main unit Needle bar, presser mechanism / upper shaft mechanism ....3 - 2 Rotary hook drive mechanism / Feed and bobbin mechanism / Cutter assy........3 - 7 Bobbin winder mechanism ....

  • Page 78: Needle Bar, Presser Mechanism / Upper Shaft Mechanism

    Main unit Needle bar, presser mechanism / upper shaft mechanism location diagram 3 - 2...

  • Page 79: Plate Spring Attachment

    Main unit Needle bar, presser mechanism / upper shaft mechanism Plate spring attachment *Front view 1. Attach the plate spring 1 from the front of the arm bed using the screws 1 (two). 2. Attach the plate spring 1 from the back of the arm bed using the adjusting screw 2.

  • Page 80: Needle-Presser Module Attachment

    Main unit Needle bar, presser mechanism / upper shaft mechanism Needle-presser module attachment Retaining ring E5 1. Attach retaining ring E5 to the shaft 1. 2. Insert the shaft 1 into the shaft hole on the left side of the needle bar and presser module 2.

  • Page 81: Main Unit Needle Bar, Presser Mechanism / Upper Shaft Mechanism

    Main unit Needle bar, presser mechanism / upper shaft mechanism Pulley attachment 1. Attach the pulley 1 to the upper shaft assy. *Key point • When the D cut 2 on the upper shaft is facing forward, the pulley base line 3 is on the upper side. forword Start movie clip (CD-ROM version only) Upper shaft assy.

  • Page 82: Connecting The Needle-Presser Module And Upper Shaft

    Main unit Needle bar, presser mechanism / upper shaft mechanism Connecting the needle-presser module and upper shaft 1. Face the unit shaft D cut 1 and the upper shaft D cut 2 forward. 2. Screw the screws 1 (two) into the fixed joint 3. *Key point •...

  • Page 83: Rotary Hook Drive Mechanism / Feed And Bobbin Mechanism /Cutter Assy

    Main unit Rotary hook drive mechanism / Feed and bobbin mechanism /Cutter assy. location diagram 3 - 7...

  • Page 84: Timing Pulley D Attachment

    Rotary hook drive mechanism / Feed and bobbin Main unit mechanism /Cutter assy. Assembling the Lower shaft A assembly Retaining ring E6 1. Attach retaining ring E6 to lower shaft A. 2. Attach the thrust washer 1, lower shaft bushing 2, thrust washer 1 and set screw collar 3 (Face the ground surface toward the lower shaft bushing).

  • Page 85: Lower Shaft A Attachment

    Main unit Rotary hook drive mechanism / Feed and bobbin Lower shaft pulley Lower shaft A attachment base line 1. Rotate the lower shaft, and bring the needle bar to its highest point 1 (lower shaft pulley base line forward). 2.

  • Page 86: Feed Module Attachment

    Main unit Rotary hook drive mechanism / Feed and bobbin feed module attachment Solid circle mark 1. Rotate the lower shaft, and bring the needle bar to its highest point (lower shaft pulley base line forward). 2. Apply Epnoc Grease AP to the disk 1, and attach it to the lower shaft joint.

  • Page 87: Thread Cutter Module Attachment

    Main unit Rotary hook drive mechanism / Feed and bobbin *Bottom view Thread cutter module attachment 1. Attach the thread cutter module 1 using the screw 1 and the screw 2. Start movie clip (CD-ROM version only) Screw, Bind Torque M4X5 1.18 –...

  • Page 88: Bobbin Winder Mechanism

    Main unit Bobbin winder mechanism location diagram 3 - 12...

  • Page 89: Bobbin Winder Mechanism

    Main unit Bobbin winder mechanism Bobbin winder shaft stopper (bobbin winder assembly holder) assembly 1. Attach the bobbin winder shaft stopper 1 and SW adjust plate 2 to the bobbin winder assembly holder 3, and hand start the screws 1 (two). (Fully tighten after 3 - 14 "5 Bobbin winder holder assembly attachment.") Start movie clip (CD-ROM version only) Taptite, Bind B...

  • Page 90: Bw Holder Supporter Attachment

    Main unit Bobbin winder mechanism BW holder supporter attachment 1. Attach the BW holder supporter 1 using the screw 1. Start movie clip (CD-ROM version only) Taptite, Bind S Torque M4X10 1.18 – 1.57 N·m Color; Gold Bobbin winder holder assembly attachment 1.

  • Page 91: Bobbin Winder Cover Attachment

    Main unit Bobbin winder mechanism Bobbin winder cover attachment 1. Attach the bobbin winder cover 1 using the screw 1. Start movie clip (CD-ROM version only) Screw, Bind Torque M3X6 0.78 – 1.18 N·m Color; Silver Bobbin base assembly Blade side 1.

  • Page 92: Thread Tension Mechanism

    Main unit Thread tension mechanism location diagram 3 - 16...

  • Page 93: Thread Tension Mechanism

    Main unit Thread tension mechanism Spring tape attachment 1. Attach the spring tape 1 to the thread guard assembly 2. 0 – 0.5 *Key point • See the figure to the right for positioning. Thread guide wire attachment 1. Attach the thread guide wire 1 and washer 2 using the screw 1. *Key point •...

  • Page 94: Thread Take Up Spring Attachment

    Main unit Thread tension mechanism Thread take up spring attachment 1. Attach the to the thread catching spring case 1. *Key point • Insert the end 2 of into spring tensile position hole (second from bottom). 3 between the protrusions on the •...

  • Page 95: Tension Disk Attachment

    Main unit Thread tension mechanism Tension disk attachment 1. Attach tension disc A 1, tension disc B 2, a washer 3, thread tension plate A 4, the tension disc washer 5, washer 3, spring and tension adjusting screw 6 to the thread tension disk shaft. 2.

  • Page 96: Thread Tension Gear Attachment

    Main unit Thread tension mechanism Thread tension gear attachment 1. Attach the thread tension gear 1, spring 2 and thread tension gear cover 3 and attach retaining washer E3. *Key point • Attach the spring 2 to the small holes 4 in the thread tension gear 1 and thread tension gear cover 3.

  • Page 97: Tension Releaser Link Attachment

    Main unit Thread tension mechanism Tension releaser link attachment 1. Attach the tension releaser link 1 to the thread release holder assy., and attach retaining ring E3. Start movie clip (CD-ROM version only) Retaining ring E3 Thread guide shutter assembly 1.

  • Page 98: Thread Release Holder Assy. Attachment

    Main unit Thread tension mechanism Thread release holder assy. attachment 1. Attach the tension release holder assy. 1 to the thread guard assembly 2 using the screws 1 (two). Start movie clip (CD-ROM version only) Screw, Bind Torque M3X4 0.78 – 1.18 N·m Color;...

  • Page 99: Thread Guide Cover Assembly

    Main unit Thread tension mechanism Thread guide cover assembly. 1. Attach the thread guide cover 1 to the thread guide assy. 2 using the screw 1. 2. Attach the thread guide cover assembly 1 to the thread guard assembly using the screws 2 (two). Start movie clip (CD-ROM version only) Taptite, Bind B Torque...

  • Page 100: Electrical Parts And Motors

    Main unit Electrical parts and motors location diagram 3 - 24...

  • Page 101: Electrical Parts And Motors

    Main unit Electrical parts and motors NP PCB assy. attachment 2, 3 1. Attach the PCB holder 1 to the arm bed using the screws 1 (three). 2. Attach NP PCB assy. 2 and the insulation sheet 3 to the PCB holder 1 using the screws 2 (two).

  • Page 102: Side Feed Mechanism Assembly

    Main unit Electrical parts and motors Side feed mechanism assembly 1. Attach the S pulse motor 1 using screws 1 (two). 2. Attach the side feed gear 2 to the side feed plate 3, and attach 3. Attach the side feed plate and side feed spacer 4 to the SPM holder, and attach retaining ring E3.

  • Page 103: Side Feed Mechanism Attachment

    Main unit Electrical parts and motors Side feed mechanism attachment 1. Attach the side feed unit 1 and wire clip using screws 1 (two). 2. Attach the side feed adjust plate 2 to the feed module feed bar using screws 2 (two). Taptite, Bind S Torque M4X10...

  • Page 104: Motor Fan Attachment

    Main unit Electrical parts and motors Motor fan attachment 1. Attach the motor fan 1 to the main motor assembly 2. Start movie clip (CD-ROM version only) Inlet assy. attachment 1. Attach the regulator adjusting screw assy. 1 to the base plate. 2.

  • Page 105: Base Plate Attachment

    Main unit Electrical parts and motors Base plate attachment 1. Attach the base plate assembly 1 to the arm bed using the screws 1 (three). *Key point • Pull the power cord approximately 5 cm out of the cord reel assembly.

  • Page 106: Electrical Parts And Motors

    Main unit Electrical parts and motors PBC unit LED lamp-FL attachment 1. Attach the PBC unit LED lamp-FL 1 to the needle-presser module using the screw 1. Start movie clip (CD-ROM version only) Torque Taptite,Pan B M4X12 0.78 – 1.18 N·m Color;...

  • Page 107: Lead Assy. Processing

    Main unit Electrical parts and motors Lead assy. processing Connect the connector 1. Attach the BH lead assy. to the BH switch assy. 2. Pass the Z pulse motor and LED lamp FL leads over the wire clip. 3. Fasten the BH switch assy. connector using the lower wire clip, and fasten the other leads using the upper wire clip.

  • Page 108: Main Pcb Assy Connector Connection (Lower)

    Main unit Electrical parts and motors Main PCB assy connector connection (lower) 1. Connect the main motor leads to CN301 (white) 1 on the power supply unit F. 2. Connect the power supply unit F leads 2 to CN14POWER on main PCB assy..

  • Page 109: Main Parts

    Main unit Main parts location diagram 3 - 33...

  • Page 110: Main Parts

    Main unit Main parts Handle assembly and attachment 1. Attach the handle, handle holder and polyester slider to the handle shafts, Retaining ring E4 and attach retaining rings E4 (two). 2. Attach the handle to the arm bed using the screws 1 (two). Start movie clip (CD-ROM version only) Torque Taptite, Bind S...

  • Page 111: Front Cover Assembly (Ss-Vr F Pcb Assy. Attachment)

    Main unit Main parts Front cover assembly (SS-VR F PCB assy. attachment) 1. Attach the thread cut button 1, reverse button 2 and SS-button 3. 2. Align the SS-VR F PCB assy. 4 VR1 5 and the SV joint plate 6, and attach the SS-VR F PCB assy.

  • Page 112: Front Cover Assembly (Spool Pin Attachment)

    Main unit Main parts Front cover assembly (spool pin attachment) 1. Attach the spool pin 1 to the spool pin holder assembly 2. 2. Attach the spool pin holder assembly 2 using the screw 1. 3. Attach the thread bobbin cover 3 using the screws 2 (two). Start movie clip (CD-ROM version only) Taptite, Cup B Torque...
  • Page 113 Main unit Main parts Front cover assembly (assembling the operation PCB holder) 1. Attach the rubber keys 1 to the operation PCB holder 2. 2. Attach the operation F3 PCB assy. 3 using the screws 1 (four). 3. Attach the flat cable 4 from the LCD panel to CN1 on the operation F3 PCB assy., and secure it by sliding the stoppers 5 on both sides of CN1 downward.

  • Page 114: Front Cover Attachment

    Main unit Main parts Front cover attachment 1. Hand start the screw 1. 2. Attach the flat cable 1 from the operation F3 PCB assy. to CN7 on the main PCB assy. 3. Attach the front cover. *Key point • Attach starting with the bobbin winder cover 2. •...

  • Page 115: Top Cover Attachment

    Main unit Main parts Top cover attachment 1. Attach the top cover 1 to the front cover. *Key point • The attachments (two, left and right) for the top cover 1 fall to the inside. Assembling needle plate B assy. 1.

  • Page 116: Face Plate Assembly

    Main unit Main parts Face plate assembly 1. Attach the needle thread lever shaft 1, needle thread lever 2 and rubber washer 3 to the face plate. 2. Attach to the presser plate 4. 3. Attach the presser plate 4 to the face plate using the screw 1. 4.

  • Page 117: Needle-Presser Module

    Modules Needle-presser module breakout diagram 3 - 41...

  • Page 118: Shaft Bushing Assembly Attachment

    Modules Needle-presser module Shaft bushing assembly attachment 1. Using the screws 1 (two), attach the shaft bushing assembly 1 to the upper unit holder. Start movie clip (CD-ROM version only) Torque Screw, Pan (S/P washer) M4X14DB 1.18 – 1.57 N·m Color;...

  • Page 119: Presser Bar Attachment

    Modules Needle-presser module Presser bar attachment 1. Attach the presser bar bushing 1 to the upper unit holder using the screw 2. Apply a small amount of Molykote Em30L to the presser bar clamp 2. 3. Lubricate the end of the presser bar 3 with Sewing Lube. 4.

  • Page 120: Modules Needle-Presser Module

    Modules Needle-presser module Shaft attachment 1. Attach the shaft 1. Start movie clip (CD-ROM version only) Thread release lever assy. attachment 1. Apply a small amount of Molykote EM30L to the thread release lever assy. hole 1 in the upper unit holder. 2.

  • Page 121: Z Pulse Motor Attachment

    Modules Needle-presser module Z pulse motor attachment. 1. Attach the Z pulse motor (ZPMSMJ-35-4840-A) 1 to the upper unit holder using the screw 1. *Key point • Align the match mark 2 on the Z pulse motor gear and the match mark 3 on the T cam gear.

  • Page 122: Z Zigzag Lever Assy. Attachment

    Modules Needle-presser module Z zigzag lever assy. attachment 1. Attach the cap to the Z zigzag lever assy. 1. 2. Apply a small amount of Molykote EM30L to the Z zigzag lever assy. 1 pins (two). 3. Attach the Z zigzag lever assy. 1 to the upper unit holder, and attach retaining ring E3.

  • Page 123: Thread Take-Up Lever Assy. Attachment

    Modules Needle-presser module Thread take-up lever assy. attachment 1. Lubricate surface of the thread take-up lever 1 on the needle bar crank rod assy. and the thread take-up lever assy. shaft 2 with a small amount of Molykote EM30L. 2. Attach the needle bar crank rod assy. 3 to the thread take-up counter weight 4 using the screws 1 (two).

  • Page 124: Presser Foot Lifter Attachment

    Modules Needle-presser module Presser foot lifter attachment Retaining ring E4 1. Attach retaining ring E4 to the presser lift shaft 1. 2. Apply a small amount of Molykote EM30L to the presser lift shaft 1. 3. Insert the presser lift shaft 1 into the hole 2 in the thread releaser assy., and attach the washer 3, lifter assy.

  • Page 125: Threader Hook Assy. Attachment

    Modules Needle-presser module Threader hook assy. attachment 1. Assemble the threader hook assy. 1, link A assy. 2, link B 3 and thread guide assy. 4. 2. Align needle thread shaft A 5 to the shape of the threader hook assy. 1 shaft hole, and attach the threader hook assy.

  • Page 126: Thread Guide Plate Attachment

    Modules Needle-presser module Thread guide plate attachment 1. Attach the thread guide plate 1 to the upper unit holder. Start movie clip (CD-ROM version only) Shaft bushing A attachment 1. Attach shaft bushing A 1 to the upper unit holder using the screw 1. Start movie clip (CD-ROM version only) Torque Taptite, Bind B...

  • Page 127: Lever Ab Assy. Attachment

    Modules Needle-presser module Lever AB assy. attachment Retaining ring E2 1. Attach retaining ring E2 to the lever guide shaft 1. 2. Apply a small amount of Epnoc Grease AP to the lever guide shaft 1. 3. Apply a small amount of Molykote EM30L to the upper unit holder slide groove.

  • Page 128: Lever A Spring Attachment

    Modules Needle-presser module Lever A spring attachment 1. Attach to the lever AB assy. 1 and the plate 2. Start movie clip (CD-ROM version only) 30.1 SPRING XC2461*** A decided hook form is the same. Shaft assy. attachment 1. Apply a small amount of Epnoc Grease AP to the needle bar supporter assy.

  • Page 129: Needle Bar Assembly

    Modules Needle-presser module Needle bar assembly 1. Attach the needle thread plate 1 to the needle block 2. 2. Attach the needle block 2 to the needle bar 3 using the screw 1. *Key point • With the needle bar groove 4 facing forward, 1 is on the right side.

  • Page 130: Needle Bar Assembly Attachment

    Modules Needle-presser module Needle bar assembly attachment 1. Apply a small amount of Epnoc Grease AP to the needle thread block 1. 2. Attach the needle bar 2, needle thread block 1, needle bar hook stand assy. 3, thrust washer and, hand start screws 1 (two).

  • Page 131: Lock Nut Attachment

    Modules Needle-presser module Release lever attachment 1. Attach retaining washer E2 to the release lever shaft. 2. Attach the release adjuster 1 to the release lever 2, and hand start screws 1 (two). (Fully tighten following 4 - 25 "Release adjustment.") 3.

  • Page 132: Spring (For Needle Bar Supporter Assy.) Attachment

    Modules Needle-presser module Spring (for needle bar supporter assy.) attachment 1. Attach to the needle bar supporter assy. plate 1 and the upper unit holder 2. *Key point • Connect the side with the short hook to the needle bar supporter assy.

  • Page 133: Presser Dial Attachment

    Modules Needle-presser module Presser dial attachment 1. Attach the presser dial shaft assy. 1 to the presser dial 2, and attach retaining ring E4. *Key point • See the figure to the right for the presser dial shaft assy. 1 D cut 3 and presser dial 2 hole 3.

  • Page 134: Zigzag Adjusting Nut Attachment

    Modules Needle-presser module Zigzag adjusting nut attachment 1. Apply a small amount of Epnoc Grease AP to the zigzag adjusting nut 1. 2. Hand tighten the zigzag adjusting nut 1 on the needle bar supporter assy. using the screw 1. (Fully tighten after 4 - 10 "Three point needle drop adjustment.") *Key point •...

  • Page 135: Adjusting Plate Assy. Attachment

    Modules Needle-presser module Adjusting plate assy. attachment 1. Attach the adjusting plate assy. 1 to the upper unit holder using the screws 1 (two). *Key point • Hold the adjusting plate assy. 1 against the right stopper and attach. • Align the presser lifter shaft and the adjusting plate assy. hole Torque Taptite, Bind B M4X10...

  • Page 136: Feed Module

    Modules Feed module breakout diagram 3 - 60...

  • Page 137: Feed Module

    Modules Feed module *Inside Drop knob attachment view 1. Attach retaining rings E2 (two) to slide shafts B 1 (two). 2. Attach the drop knob 2 and to slide shaft B assembly 1 (two) to the feed base 3, and attach retaining rings E2 (two). 3.

  • Page 138: Drop Assy. Attachment

    Modules Feed module Drop assy. attachment 1. Attach the drop assy. 1 using the screws 1 (two). Start movie clip (CD-ROM version only) Torque Screw, Bind M4X5 1.18 – 1.57 N·m Color; Silver Bushing supporter assy. assembly 1. Attach the lower shaft bushing 1 and bushing presser B 2 to the bushing supporter assy.

  • Page 139: Feed Adjuster Assembly Attachment

    Modules Feed module Feed adjuster assembly attachment 1. Attach the feed adjuster assy. 1, polyester slider 2 and to the bushing supporter assy. 3. *Key point • Attach to the feed adjuster assy. 2 starting with the side having the smaller spring diameter. 2.

  • Page 140: Assembling The Feed Arm Assy

    Modules Feed module Assembling the feed arm assy. Retaining ring E2 1. Attach the feed arm B assy. 1 to the feed supporting plate assy. 2, and attach retaining ring E2. 2. Lubricate the feed supporting plate assy. 2 shaft with 1 – 2 drops of turbine oil #100.

  • Page 141: Feed Arm Assembly Attachment

    Modules Feed module Retaining Feed arm assembly attachment ring E5 1. Attach retaining ring E5 to the horizontal feed shaft 1. 2. Align the feed arm B assy. feed regulator slide block shaft 2 with the feed adjuster assembly hole 3. 3.

  • Page 142: Assembling The Lower Shaft B Assy

    Modules Feed module Retaining Assembling the lower shaft B assy. ring E6 1. Attach the set screw collar 1, thrust washer 2, lower shaft bushing 3 and thrust washer 2 to the lower shaft B assy. 4, and attach retaining ring *Key point •...

  • Page 143: Lower Shaft B Assy. Attachment

    Modules Feed module Lower shaft B assy. attachment 1. Attach the bushing supporter A 1 to the feed base 2. 2. Attach the lower shaft B assy. 3. 3. Attach bushing presser A 4 using the screws 1 (two). 4. Attach the joint 5 using the screws 2 (two). *Key point •...

  • Page 144: Grease Applications

    Modules Feed module Grease applications 1. Apply a small amount of Epnoc Grease AP to the vertical rod seat 1 on the vertical lever, the lower shaft horizontal feed cam surface 2 and the vertical feed cam surface 3. 2. Apply a small amount of Molykote EM30L grease to the lower shaft gear Apply Epnoc Grease AP to the vertical rod seat Small amount Apply Epnoc Grease AP to the vertical feed cam...

  • Page 145: Feed Bar Attachment

    Modules Feed module Feed bar attachment 1. Apply a small amount Molykote EM30L to the shaft holes 1 (two) in the feed bar. 2. Attach the feed bar 2 and feed bar shaft A 3 to feed arm A 4 using the screws 1 (two).

  • Page 146: Outer Rotary Hook Assy. Attachment

    Modules Feed module Outer rotary hook assy. attachment 1. Apply a small amount of Molykote EM30L to the shaft supporter 1. 2. Install the outer rotary hook shaft 2, spacer (thin) 3, outer rotary hook assy. 4, washer 6 (thick) 5 and the spacer (thin) 3. *Key point •...

  • Page 147: Fpm Holder Assy. Attachment

    Modules Feed module FPM holder assy. attachment 1. Turn the F pulse motor gear counterclockwise until the stopper 1 on it touches the FPM holder assy. shaft. 2. 2. Set the feed adjuster assy. 3 to the position in the figure to the right. 3.

  • Page 148: F Gear Teeth Alignment

    Modules Feed module F gear teeth alignment 1. Apply a small amount of Epnoc Grease AP to the feed adjuster assy. F gear 2. Turn the F pulse motor gear clockwise until the stopper 2 on it touches the bushing supporter assy. shaft 3. 3.

  • Page 149: Spring Attachment (For Fpm Holder Assy.)

    Modules Feed module Spring attachment (for FPM holder assy.) 1. Attach to the feed base 1 and FPM holder assy. 2. Start movie clip (CD-ROM version only 19.8 SPRING XC2538*** Assembling needle plate A assy. 1. Attach the F gear stopper plate 1 and stopper plate 2 to needle plate A 3 using the screws 1 (two).

  • Page 150: Thread Cutter Module

    Modules Thread cutter module breakout diagram 3 - 74...

  • Page 151: Thread Cutter Module

    Modules Thread cutter module C pulse motor attachment. 1. Attach the C pulse motor (ZPMM35SP-9N) 1 to the motor holder assy. 2 using the screws 1 (two). 2. Lubricate the C pulse motor 1 bearing with 1 – 2 drops of turbine oil # 100.

  • Page 152: Assembling The Thread Cutter Lever Assy

    Modules Thread cutter module Assembling the thread cutter lever assy. 1. Attach the thread cutter lever gear 1 to the thread cutter lever 2 using the screw 1. Start movie clip (CD-ROM version only) Screw, Pan (S/P washer) Torque M3X6DA 0.78 –...

  • Page 153: Assembling The Thread Hook Assy

    Modules Thread cutter module Assembling the thread hook assy. 1. Attach the NT lower thread cutter 1 to the spacer 2. 2. Attach the thread hook assy. 3 to the spacer 2. 3. Attach a polyester slider 5 to pin A 4, and attach retaining ring E4. Start movie clip (CD-ROM version only) Retaining ring E4 Pile 4 x 8 attachment...

  • Page 154: Grease Applications

    Modules Thread cutter module Grease applications 1. Apply a small amount of Epnoc Grease AP to the all of the operating surfaces 1 of the idle gear assy. and C pulse motor gear. 2. Apply a small amount of Epnoc Grease AP to the all of the operating surfaces 2 of the thread cutter lever gear and idle gear assy.

  • Page 155: Adjustment

    Adjustment Inspection Needle curvature........4 - 2 Tip damage to needle ......4 - 3 Test Mode ..............4 - 4 Adjustment (Main Unit)Timing belt tension adjustment ....4 - 6 Motor belt tension adjustment....4 - 7 Needle bar rise adjustment ..... 4 - 8 Needle bar height adjustment ....

  • Page 156: Needle Curvature

    Inspection Needle curvature 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. 4 - 2...

  • Page 157: Tip Damage To Needle

    Inspection Tip damage to needle 1. Touch the tip of the needle to your finger, and check to be sure it does not catch. 4 - 3...

  • Page 158: Test Mode

    Test Mode Starting test mode • With the front cover in place Press while turning the power on; the buzzer will sound four times, and test mode will start. • With the front cover in place Press SW1 and SW3 on the main PCB assy. while turning the power on; the buzzer will sound four times, and test mode will start.
  • Page 159 Test Mode Test Modes (When changing modes, turn the power off, and restart the test mode) Mode Mode selection button Z (zigzag) F (feed) Operating speed operations operations 3 point needle With front cover Switches left base Any speed may be Press twice, select drop...

  • Page 160: Timing Belt Tension Adjustment

    Adjustment (Main Unit) Timing belt tension adjustment 1. Loosen the pan (S/P washer) M4X10 screw on the tension pulley assembly. 2. With a force of 2 N (200 g) pushing on the center of the belt, adjust the tension pulley assembly position for a deflection of 3 –...

  • Page 161: Motor Belt Tension Adjustment

    Adjustment (Main Unit) Motor belt tension adjustment 1. Loosen the upset 4 x 12 DB (two) in the motor holder. 2. With a force of 2 N (200 g) pushing on the center of the belt, adjust the motor pulley position for a deflection of 4 –...

  • Page 162: Needle Bar Rise Adjustment

    Adjustment (Main Unit) Needle bar rise adjustment 1. Remove the front cover, and turn on the power while pushing SW1 and SW3 on the main PCB assy. (the buzzer sounds four times and test mode starts). *See (4 - 5 "Test Mode") for starting test mode with the front cover in place. 2.

  • Page 163: Needle Bar Height Adjustment

    Adjustment (Main Unit) Needle bar height adjustment 1. Remove the front cover, and turn on the power while pushing SW1 and SW3 on the main PCB assy. (the buzzer sounds four times and test mode starts). *See (4 - 5 "Test Modes (When changing modes, turn the power off, and restart the test mode)") for starting test mode with the front cover in place.

  • Page 164: Three Point Needle Drop Adjustment

    Adjustment (Main Unit) Three point needle drop adjustment 1. Remove the front cover, and turn on the power while pushing SW1 and SW3 on the main PCB assy. (the buzzer sounds four times and test mode starts) *See (4 - 5 "Test Modes (When changing modes, turn the power off, and restart the test mode)") for starting test mode with the front cover in place.

  • Page 165: Needle Interference Left/Right Adjustment

    Adjustment (Main Unit) Needle interference left/right adjustment. 1. Turn the pulley by hand, and insert the tip of the needle into the needle hole. 2. Loosen the screw (3X10). 3. Adjust the needle holder shaft block to the left or right so that the left base line / right base line needle drop is uniform forward and back with respect to the needle plate A hole.

  • Page 166: Clearance Between The Needle And The Rotary Hook Point Adjustment

    Adjustment (Main Unit) Clearance between the needle and the rotary hook point adjustment 1. Remove the front cover, and turn on the power while pushing SW1 and SW3 on the main PCB assy. (the buzzer sounds four times and test mode starts) *See (4 - 5 "Test Modes (When changing modes, turn the power off, and restart the test mode)") for starting test mode with the front cover in place.

  • Page 167: Presser Bar Height And Parallel Adjustment

    Adjustment (Main Unit) Presser bar height and parallel adjustment 1. Raise the presser foot lifter. 2. Turn the pulley so that the feed dog drops below needle plate A. 3. Loosen the set screw (CP) M5X10 in the presser bar clamp assy. 4.

  • Page 168: Upper Thread Tension Adjustment

    Adjustment (Main Unit) Upper thread tension adjustment 1. Raise the presser foot lifter. 2. Turn the thread tension dial to the “Auto” position. 3. Pass a Schappe Spun Sewing Thread #60 through the thread guide => tension plate => tension disk => plate assembly.

  • Page 169: Fine Tension Adjustment

    Adjustment (Main Unit) Fine tension adjustment 1. Raise the presser foot lifter. 2. Pass Schappe Spun Sewing Thread #60 through the thread guide => tension plate. 3. Lower the presser foot lifter. 4. Pull the thread with a tension gauge, and adjust the power lock 2x3 so that it is 0.08 – 0.11 N (8 – 11 g). XA9153001 Tension gauge 30 (0.3 N) 4 - 15...

  • Page 170: Inner Rotary Hook (Lower Thread) Tension Adjustment

    Adjustment (Main Unit) Inner rotary hook (lower thread) tension adjustment 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). XA9153001 Tension gauge 30 (0.3 N) 4 - 16...

  • Page 171: Feed Adjustment

    Adjustment (Main Unit) Feed adjustment 1. Remove the front cover, and turn on the power while pushing SW1 and SW3 on the main PCB assy. (the buzzer sounds four times and test mode starts) *See (4 - 5 "Test Mode") for starting test mode with the front cover in place. 2.

  • Page 172: Bobbin Winder (Uneven Bobbin Winding And Bobbin Winding Amounts) Adjustment

    Bobbin winder (uneven bobbin winding and bobbin Adjustment (Main Unit) winding amounts) adjustment 1. Move the bobbin winder guide assembly up and down and adjust uneven bobbin winding. 2. Turn the bobbin presser left and right, and adjust the winding quantity. *Key point •...

  • Page 173: Bh Lever Switch Position Adjustment

    Adjustment (Main Unit) BH lever switch position adjustment 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 174: Forward And Back Adjustment Of Needle And Presser

    Adjustment (Main Unit) Forward and back adjustment of needle and presser. 1. Turn the pulley by hand, and insert the tip of the needle into the needle hole. 2. Loosen the locknut. 3. Adjust the needle tip to the front/back center position of the needle hole using the set screw (socket (CP) M4X12). 4.

  • Page 175: Knee Lifter Adjustment

    Adjustment (Main Unit) Knee lifter adjustment 1. Lower the presser foot lifter. 2. Loosen the adjustment screws (two). 3. With a load of 5N (500 g) applied to the lifter, adjust the lifter and presser feed holder space. *Key point •...

  • Page 176: Side Feed Line Adjustment

    Adjustment (Main Unit) Side feed line adjustment 1. Start test mode (refer to 4.4 "Test Mode" for test mode startup methods). 2. After pressing and selecting , press , and after selecting "FORWARD AND REVERSE FEED," press again until the needle moves to the left (base line) position and select "Feed line adjustment mode." Material drift correction value Left and right length correction value 3.

  • Page 177: One-Point Pattern Adjustment

    Adjustment (Main Unit) One-point pattern adjustment 1. Start test mode (refer to 4.4 "Test Mode" for test mode startup methods). 2. After pressing and selecting , press , and select "PATTERN ADJUSTMENT." F feed correction value S feed correction value 3.

  • Page 178: Left And Right Feed Dog Position Adjustment

    Adjustment (Main Unit) Left and right feed dog position adjustment 1. Perform "4-21 Front and back feed dog position adjustment." 2. Start test mode (refer to 4.4 "Test Mode" for test mode startup methods). 3. After pressing and selecting , press , and select "FEED DOG POSITION."...

  • Page 179: Release Adjustment

    Adjustment (Main Unit) Release adjustment 1. Remove the face plate. 2. Start test mode (refer to 4.4 "Test Mode" for test mode startup methods). 3. After pressing and selecting , press , and select "RELEASE." 4. Adjust the release adjuster up and down so that the moving part of the needle bar holder assy. does not come into contact with the release guide plate.

  • Page 180: Front/Back, Left/Right Position Of Feed Dog Adjustment

    Adjustment (Modules) Front/back, left/right position of feed dog adjustment 1. Remove the M4 screws (two), and remove needle plate A from the feed base. 2. Align the feed adjuster assy. gear and F pulse motor gear match marks (feed in 0 mm position). Match mark 3.

  • Page 181: Feed Dog Height Adjustment

    Feed dog height adjustment Adjustment (Modules) 1. Turn lower shaft B, and bring the feed dog to its highest position (D cut of the lower shaft B facing up). 2. Loosen the M5 nut. 3. Adjust the feed dog height so that it is 0.9 – 1.1 mm from the upper surface of needle plate A by the amount the vertical adjuster screw assembly is screwed in.

  • Page 182: Inner Rotary Hook Bracket Position Adjustment

    Adjustment (Modules) Inner rotary hook bracket position adjustment 1. Set the inner rotary hook in the outer rotary hook. 2. Loosen the screw (bind 3x8) 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 183: Adjust The Needle Thread Block

    Adjust the needle thread block Adjustment (Modules) 1. Attach a needle. 2. Turn the unit shaft, and position the needle bar at its highest point (position where the D cut of the unit axis faces forward). 3. Loosen the set screw (socket FT 4 x 4). 4.
  • Page 184 Adjustment (Modules) 4 - 30...

  • Page 185: 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. Power does not come on ......5 - 2 Pulse motors do not return to starting point ........... 5 - 3 Pattern cannot be selected .....

  • Page 186: 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, is the voltage between pins 1 and Replace cord reel 2 on the cord reel connector 100 V AC? Are the voltages between pins 3 &...

  • Page 187: 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 and S pulse motor returns to starting point •...

  • Page 188: Pattern Cannot Be Selected

    Failure Investigation for Electronic Parts Pattern cannot be selected Pattern cannot be selected • Adjust the assembly of SS-VR F2 PCB assy. and the operation F3 PCB assy. Are switches on the SS-VR F2 PCB assy. and the operation F3PCB assy. stuck in a depressed position? •...

  • Page 189: Main Motor Does Not Turn

    Failure Investigation for Electronic Parts Main motor does not turn Main motor does not turn Adjust the assembly of upper Does the pulley turn easily? shaft Is the main motor connector correctly connected to CN301 of power supply Reconnect it correctly unit F? Is the main motor resistance 1.5 –...

  • Page 190: Main Motor Does Not Turn

    Failure Investigation for Electronic Parts Main motor does not turn From previous page Is the presser foot lifter shaft down? Lower the presser foot lifter. Is the presser switch resistance normal? Replace switch assy. • Presser switch resistance Switch depressed … 1 Ω or less Switch out ………….

  • Page 191: 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 When the speed control lever is moved with the power ON, does the Replace SS-VR F2 PCB assy. voltage between pins 2 &...

  • Page 192: 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 193: 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 BH lever • Adjust BH lever switch connector pins 4 & 5 normal? •...

  • Page 194: Stitch Length And Zigzag Width Cannot Be Done By Manual Adjustment

    Stitch length and zigzag width cannot be done Failure Investigation for Electronic Parts by manual adjustment. Stitch length and zigzag width cannot be done by manual adjustment. Does the LCD panel display change • Replace rubber keys when the manual key for stitch length and the manual key for zigzag width •...

  • Page 195: 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 Are the resistance values for the Stop/start switch, reverse switch, raise needle switch and the thread Replace SS-VR F2 PCB assy. cut switch normal? •...

  • Page 196: 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 the assy. pin jack F connector pins 2 & 3 normal? Replace assy. pin jack F •...

  • Page 197: 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? Adjust upper thread tension...

  • Page 198: Thread Cutter Does Not Work Normally

    Failure Investigation for Electronic Parts Thread cutter does not work normally Thread cutter does not operate normally Do the thread hook assy. and lever Adjust the assembly of the thread cutter module gear move easily? Is the resistance between the 1 & 2 Replace C pulse motor pins and 3 &...

  • Page 199: Lcd Display Is Not Normal

    Failure Investigation for Electronic Parts LCD display is not normal No LCD display Are the LCD module and the Connect the LCD module and operation F3 PCB assy. properly the operation F3 PCB assy. connected? properly. Are the operation F3 PCB assy. and main Connect the operation F3 PCB F3D PCB assy.

  • Page 200: Lcd Light Does Not Come On

    Failure Investigation for Electronic Parts LCD light does not come on LCD light does not come on Are the single light guide assy. Properly connect the single backlight leads and operation F3 PCB light guide assy. backlight leads assy. properly connected? to the operation F3 PCB assy.

  • Page 201: 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 resistance between the bobbin winder assy.

  • Page 202: The Lamp At Hand Does Not Have Light

    Failure Investigation for Electronic Parts The lamp at hand does not have light. The work area lamp does not light Reconnect the main F3D PCB Are the main F3D PCB assy. and assy. and PCB Unit LED lamp PCB Unit LED lamp FL correctly FL correctly connected? Reconnect the SS-VR F2 PCB...

  • Page 203: Repair Manual

    Repair Manual 6 - 1...
  • Page 204 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 205 Repair Manual Problem Primary factors and causes Repair method Items for Inspection method Inspection and standards Stitch skipping, Bad needle interference Adjust needle interference(4-12) Needle and tip Lightly press the lower thread abrasion adjustment part (cover part) of the Thread breakage SS button while running Loose needle interference Adjust needle...
  • Page 206 Repair Manual Problem Primary factors and causes Repair method Items for Inspection method Inspection and standards 11 Even if the drop Drop knob damage Replace drop knob(3-61) Drop function With the needle bar in lever is returned to the top position and the Malfunction of vertical rod seat Readjust vertical rod seat the left, the feed...
  • Page 207 Repair Manual Problem Primary factors and causes Repair method Items for Inspection method Inspection and standards Bad feed adjustment Adjust the feed(4-17) Feed Check that the difference in forward and reverse feed is within 10 mm in the feed forward/reverse adjustment.
  • Page 208 Repair Manual Problem Primary factors and causes Repair method Items for Inspection method Inspection and standards • Needle Noise of contact between needle contact noise and outer rotary hook Adjust needle interference(4-12) • Bad needle interference adjustment • Loose needle interference Adjust needle interference(4-12) adjustment screw...
  • Page 209 Repair Manual Problem Primary factors and causes Repair method Items for Inspection method Inspection and standards 14 Needle thread Bad needle stop position lever operation • NP sensor damage Replace NP PCB assy. (3-25) catches part way • Grease or dirt adhering to Remove grease and dirt through.
  • Page 210 Repair Manual Problem Primary factors and causes Repair method Items for Inspection method Inspection and standards • Seam Seam unevenness. Check that stitches are unevenness not uneven during • Bad presser position Readjustment of presser bar actual sewing. height (4-13) •...
  • Page 211 Repair Manual Problem Primary factors and causes Repair method Items for Inspection method Inspection and standards 18 Cannot sew BH BH sewing impossible Bar-tack Check that there is no • BH is blocked Eyelet sewing stitch skipping or • Bad BH connecting point Readjust BH switch •...
  • Page 212 Repair Manual Problem Primary factors and causes Repair method Items for Inspection method Inspection and standards 20 Bobbin winder Bad BW switch Replace BW switch (3-13) Bobbin winder Operate the bobbin shaft not turning function winder with Schappe BW switch connector Plug connector in Spun Sewing Thread disconnected...

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