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Failure Investigation for Electronic Parts Thread tensioning does not go well

Set thread correctly

Thread tensioning is not right

Is the thread guide path correct?

Set the lower thread correctly

Is the lower thread placement correct?

Use the correct combination

Is the material, thread and needle
combination correct?

Adjust upper thread tension

Adjust upper thread tension disk

Adjust inner rotary hook tension

Is the inner rotary hook tension right?

Is the tension right?

Is the thread tension adjuster gap correct?

Replace pulse motor

Is the resistance between the 1 & 2
pins and 3 & 4 pins on the AT pulse
motor connectors (CN10) 4 – 6

Ω

Replace main NF3D PCB assy.

Содержание BLMY

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Страница 4: ...7 Front cover disassembly SS VR PCB assembly removal 2 8 Front cover disassembly SV keytop removal 2 8 Rear cover removal 2 9 Handle removal 2 10 Electrical parts and motors 2 11 Power supply unit F removal 2 12 Assy pin jack F removal 2 12 Wire assy removal 2 12 PCB Unit LED lamp FL removal 2 13 Base plate sub assy removal 2 13 Knee lifter assembly removal 2 13 Base plate cover and inlet assembly...

Страница 5: ...val 2 28 Lower shaft A assy removal 2 29 Joint removal 2 29 Timing pulley D removal 2 29 Lower shaft bushing removal 2 29 Needle bar presser mechanism Upper shaft mechanism 2 30 Upper shaft removal 2 31 Pulley removal 2 31 Upper shaft pulley removal 2 31 Tension pulley assembly removal 2 31 Needle presser module removal 2 32 Wire assy removal 2 32 Plate spring removal 2 33 Needle presser module 2 ...

Страница 6: ...nner rotary hook bracket assy removal 2 49 Outer rotary hook assy removal 2 49 Feed bar spring removal 2 50 Feed bar removal 2 50 Vertical adjusting screw removal 2 50 Feed supporting plate spring removal 2 50 Lower shaft B assy removal 2 51 Lower shaft B assy disassembly 2 51 Shaft stopper plate removal 2 52 Set screw collar removal 2 52 Feed arm assembly removal 2 52 Feed arm assy disassembly 2 ...

Страница 7: ...BW F SW assy attachment 3 12 BW holder supporter attachment 3 13 Bobbin winder holder assembly attachment 3 13 Bobbin presser assembly 3 13 Bobbin winder cover attachment 3 14 Bobbin base assembly 3 14 Bobbin base attachment 3 14 Thread tension mechanism 3 15 Spring tape attachment 3 16 Thread guide wire attachment 3 16 Thread take up spring attachment 3 17 Tension disk attachment 3 18 AT pulse mo...

Страница 8: ... thread guide cover attachment 3 38 Assembling needle plate B assy 3 38 Needle plate B assy attachment 3 38 Face plate assembly 3 39 Face plate assy attachment 3 39 Top cover attachment 3 39 Accessory table assembly and attachment 3 40 Needle presser module 3 41 Shaft bushing assembly attachment 3 42 Thread take up lever link assembly 3 42 Presser bar attachment 3 43 T cam attachment 3 43 Shaft at...

Страница 9: ...haft B assy 3 66 Lower shaft B assy attachment 3 67 Supporting plate spring attachment 3 68 Grease applications 3 68 Vertical adjusting screw attachment 3 69 Feed bar attachment 3 69 Feed bar spring attachment 3 70 Outer rotary hook assy attachment 3 70 Inner rotary hook bracket assy attachment 3 71 Assembling F pulse motor assembly 3 71 FPM holder assy attachment 3 72 F gear teeth alignment 3 73 ...

Страница 10: ...t 4 17 Bobbin winder uneven bobbin winding and bobbin winding amounts adjustment 4 18 BH lever switch position adjustment 4 19 Forward and back adjustment of needle and presser 4 20 Knee lifter adjustment 4 21 Side feed line adjustment 4 22 One point pattern adjustment 4 23 Left and right feed dog position adjustment 4 24 Release adjustment 4 25 Front back left right position of feed dog adjustmen...

Страница 11: ...ed 5 13 Thread tensioning does not go well 5 14 Thread cutter does not work normally 5 15 LCD display is not normal 5 16 LCD light does not come on 5 17 Bobbin winding cannot be done 5 18 The lamp at hand does not have light 5 19 Error is displayed 5 20 6 Special Instructions of Wiring 6 1 Needle bar module wiring 6 2 Thred cutter rotary hook module wiring 6 4 Side feed mechanism wiring 6 5 Main P...

Страница 12: ...1 1 1 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 ...

Страница 13: ...hanism Main Mechanisms Upper shaft mechanism Side feed mechanism Rotary hook drive mechanism Feed Rotary hook mechanism Thread cutting mechanism Bobbin winder mechanism Thread guide mechanism Needle bar Presser mechanism ...

Страница 14: ...ook stand Needle bar Needle Unit shaft Joint Upper shaft Pulley Needle bar supporter assy Z zigzag lever Needle bar release lever Z zigzag cam Z pulse motor Lower shaft gear Lower shaft b assy Joint Lower shaft A S pulse motor Side feed bar Timing pulley D Timing belt Side feed plate Upper shaft Feed arm A Outer rotary hook Feed bar Vertical adjusting screw Feed dog Feed arm b assy F pulse motor U...

Страница 15: ...pulse motor BH change switch assy BH switch lever PCB UNIT LED LAMP FL PCB UNIT LED LAMP FR Inlet assy F pulse motor S pulse motor C pulse motor PCB ASSY MAIN PCB ASSY OPERATION Power switch Foot controller jack Power supply unit F PCB ASSY NP LCD module LCD panel SW ASSY BW F PCB ASSY SS VR ...

Страница 16: ...tching power supply Main motor drive circuit CPU Main motor PCB UNIT LED LAMP FL LED white Z pulse motor F pulse motor AT pulse motor Buzzer Constant current circuit Reset IC LCD Front cover SWASSY PF F SW ASSY BW F LED white PCB ASSY NP PCB ASSY SS VR LED 2 colors PCB UNIT LED LAMP FR PCB ASSY MAIN EEPROM NPSW ATCSW SSSW BKSW PCB ASSY Back light PCB ASSY OPERATION Key x 30 LED x 8 C pulse motor S...

Страница 17: ... is for detecting the forward and rear ends of the button hole according to the BH presser and lever BH button hole lever switch This switch detects whether the BH lever is up or down NP sensor This sensor detects the pulse motor drive timing for zizag feed and thread cutting as well as the vertical stop position of the needle It detects the upper shaft angle of rotation using a shutter attached t...

Страница 18: ... thread and needle combinations that are not in the table or those marked with an x 2 Since combinations marked with an asterisk have a greater possibility of damaging the threader or not working properly do your best to encourage users to avoid them 3 When using the threader lower the presser 4 When transparent nylon thread is used use a 14 16 sewing machine needle regardless of what is in the ta...

Страница 19: ...1 8 ...

Страница 20: ...tension mechanism 2 18 Bobbin winder mechanism 2 24 Rotary hook drive mechanism Feed and bobbin mechanism Cutter assy location diagram 2 27 Needle bar presser mechanism Upper shaft mechanism 2 30 Modules Needle presser module 2 34 Feed and bobbin module 2 47 Thread cutter module 2 56 ...

Страница 21: ...2 2 Main parts location diagram Main unit ...

Страница 22: ...assembly 1 Remove the screw 1 and then remove the face plate assembly 1 2 Remove the needle thread lever knob 2 3 Remove the screw 2 and then remove the face plate cutter holder 3 and the NT lower thread cutter 4 4 Remove the screws 3 and 4 and then remove the shaft presser plate 5 and the plain washer 6 5 Remove the spring 6 Remove the needle thread lever shaft 7 7 Remove the needle thread lever ...

Страница 23: ...sembly 1 Remove the needle plate cover 1 2 Remove the needle plate B 2 3 Remove the cutter cover 3 4 Remove the spring plate 4 from the cutter cover 3 and remove the NT lower thread cutter 6 5 Undo the slide button hook two locations and remove the slide button 5 1 2 3 4 5 6 6 Free arm cover removal 1 Remove the screw 1 and then remove the free arm cover 1 1 1 ...

Страница 24: ...and then remove the hook 2 by pushing the hook attachment section 2 on the rear cover Key point Be careful not to damage the hooks 1 and 2 on the front cover 3 Remove the 2 bottom hooks 3 from the base plate while sliding the front cover to the right 4 Remove the FFC 4 from the main PCB assembly and then remove the front cover 2 1 3 1 2 4 ...

Страница 25: ...emove the 4 screws 1 and then remove the operation PCB 2 3 Remove the connector 4 from the operation PCB 2 1 1 2 3 4 9 Operation PCB holder assembly removal 1 Remove the rubber key 1 from the operation PCB holder assembly 2 2 Remove the 4 screws 1 and then remove the operation PCB holder assembly 2 3 Remove the 2 screws 2 and then remove the 2 spacers 3 and the single light guide assembly 4 from t...

Страница 26: ...indication plate assembly 2 1 1 2 11 Front cover disassembly bobbin winder guide assembly removal 1 Remove the screw 1 and remove the bobbin winder guide assembly 1 1 1 12 Front cover disassembly spool pin holder removal 1 Remove the screws 1 and 2 and then remove the thread bobbin cover 1 spool pin holder assembly 2 and spool pin 3 1 1 3 1 2 2 ...

Страница 27: ...insulation sheet 2 and the SS VR PCB assembly 3 3 Remove the connector of the PCB unit LED lamp FR 4 Remove the reverse button 4 SS button 5 and thread cut button 6 4 6 5 3 2 1 1 2 14 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 Remove the SV joint plate 2 1 2 1 ...

Страница 28: ... being careful to prevent the presser lever 1 being caught in section 2 3 Remove section 4 being careful to prevent the switch 3 of the power supply unit being caught in section 4 4 Remove the hook 5 5 Remove section 7 being careful to prevent the presser dial 6 being caught in section 7 and then remove the rear cover 1 3 2 1 4 5 6 7 ...

Страница 29: ...le removal 1 Remove the 2 screws 1 and remove the handle 1 2 Remove the 2 retaining rings E4 from the handle shafts and remove the handle 1 the 2 handle shafts and the 2 polyester sliders from the handle holder 1 Retaining rings E4 1 1 ...

Страница 30: ...2 11 Disassembly Electrical parts and motors location diagram Main unit ...

Страница 31: ... motor connector 2 3 Disconnect the connector 3 of the inlet assembly lead wire 4 Remove the 3 screws 1 and remove the power supply unit F 4 1 4 3 2 1 2 Assy pin jack F removal 1 Remove the nut 1 and remove the assy pin jack F 2 2 1 3 Wire assy removal 1 Remove retaining ring E3 2 Loosen nut M8 1 and remove the wire assy 2 2 1 Retaining ring E3 ...

Страница 32: ...unit LED lamp FL 1 1 1 5 Base plate sub assy removal 1 Remove the 3 screws 1 and remove the base plate sub assy 1 1 1 6 Knee lifter assembly removal 1 Remove the 5 screws 1 and then the knee lifter assembly 1 1 1 7 Base plate cover and inlet assembly removal 1 Remove the 2 screws 1 and then remove the base plate cover 1 2 Remove the screw 2 and then remove the inlet assembly 2 1 1 1 2 2 ...

Страница 33: ...emove the adjusting screw assembly 2 2 1 9 Timing belt motor belt removal 1 Remove the timing belt 1 1 10 Motor fan removal 1 Remove the motor fan 1 NOTE Be careful not to bend the fins of the motor fan 1 1 11 Main motor assembly removal 1 Remove the 2 screws 1 and remove the main motor assembly 1 1 1 ...

Страница 34: ...crews 1 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 Remove the 2 spacer 4x6 5 from the fender rubber 3 1 2 4 3 1 5 13 Side feed mechanism removal 1 Remove 2 screws 1 and 2 screws 2 and remove the side feed unit and wire clip 1 2 ...

Страница 35: ...ust plate 2 washer side feed arm assy 3 and plate spring A 4 2 Remove the rubber 3 Remove screw 3 and remove the S stopper 5 4 Remove retaining ring E3 and remove the side feed plate 6 and side feed spacer 7 5 Remove and remove the side feed gear 8 6 Remove screws 4 two and remove the S pulse motor 9 3 4 5 1 2 1 2 8 Retaining ring E3 7 6 S41 9 4 3 S41 ...

Страница 36: ... removal 1 Remove the screw 1 and the 2 screws 2 and remove the main PCB assy 1 1 2 1 16 NP PCB assy removal 1 Remove the 3 screws 1 and remove the PCB holder 1 2 Remove the 2 screws 2 and remove the insulation sheet 2 and the NP PCB assy 3 from the PCB holder 1 2 3 1 1 2 ...

Страница 37: ...2 18 Thread tension mechanism location diagram Main unit ...

Страница 38: ... tension assy removal 1 Remove the spring 2 Remove the 2 screws 1 and remove the thread tension assy 1 S04 1 1 S04 2 Thread guide removal 1 Remove the 2 screws 1 and remove the thread guide assy 1 2 Remove the screw 2 and remove the thread guide cover 2 1 2 2 1 ...

Страница 39: ...ove the screw 1 and remove the tension pressure assy 1 the spring and the tension release cam 2 3 Remove the tension plate 3 and the spacer 4 4 Remove the screw the screw 2 S02 S03 Retaining ring E2 1 2 1 3 4 2 S02 S03 5 Thread release holder assy F removal 1 Remove the 2 screws 1 and remove the thread release holder assy 1 1 1 6 PF F SW assy removal 1 Remove the screw 1 and remove the PF F SW ass...

Страница 40: ...ing ring E3 and remove the thread guide shutter 1 and the thread guide shutter link 2 Retaining ring E3 S19 2 1 S19 8 Tension releaser link removal 1 Remove the retaining ring E3 and remove the tension releaser link 1 Retaining ring E3 1 9 Plate assembly removal 1 Remove the screw 1 and remove the plate assembly 1 1 1 ...

Страница 41: ...ulse motor removal 1 Remove the 2 screws 1 and remove the AT pulse motor 1 1 1 13 Tension disk removal 1 Remove the screw 1 and remove the initial adjustment plate 1 2 Remove the rubber 2 from the initial adjustment plate 1 3 Loosen the thread tension adjusting screw 3 and remove the tension plate assy 4 4 Remove the thread tension adjusting screw 3 the spring washer 5 tension disc washer 6 tensio...

Страница 42: ...take up spring removal 1 Remove the screw 1 and remove the thread catching spring case 1 2 Remove the from the thread catching spring case 1 1 1 S11 1 1 S11 15 Thread guide wire removal 1 Remove the screw 1 and remove the thread guide wire 1 and the washer 2 2 1 1 ...

Страница 43: ...2 24 Bobbin winder mechanism location diagram Main unit ...

Страница 44: ...he bobbin winder cover 2 1 2 1 2 Bobbin base disassembly 1 Remove the bobbin thread cutter holder 1 2 Remove the 2 NT lower thread cutters 2 1 2 3 Bobbin presser removal 1 Remove the screw 1 and the M3 nut 1 and remove the bobbin presser 2 1 2 1 4 Bobbin winder assembly removal 1 Remove the screw 1 and remove the bobbin winder assembly 1 1 1 ...

Страница 45: ...ssy 1 Key point Open the SW adjust plate 2 clip and remove it 2 1 7 BW shaft holder assembly removal 1 Move the BW shaft holder assembly 1 to the right bobbin winding ON 2 Remove the spring 3 Remove the BW shaft holder assembly 1 1 S21 S21 8 Bobbin winder shaft stopper removal 1 Remove the 2 screws 1 and remove the SW adjust plate 1 and the bobbin winder shaft stopper 2 2 1 1 ...

Страница 46: ...2 27 Disassembly Rotary hook drive mechanism Feed and bobbin mechanism Cutter assy location diagram Main unit ...

Страница 47: ...cutter module removal 1 Remove the 2 screws 1 and then remove the free arm plate 1 2 Remove the screws 2 and 3 and then remove the thread cutter module 2 2 1 Arm bed base 1 3 2 3 Feed module removal 1 Rotate the upper shaft and bring the needle bar to its highest point 2 Remove the 2 screws 1 and detach the feed module 1 and the disk 2 Key point Raise the needle bar to the top position 1 1 2 ...

Страница 48: ...Joint removal 1 Remove the 2 screws 1 and remove the joint 1 and the lower shaft bushing 2 1 2 1 6 Timing pulley D removal 1 Remove the 3 screws 1 2 Remove retaining ring E6 and remove the timing pulley D 1 1 Retaining ring E6 1 3 screws 7 Lower shaft bushing removal 1 Remove the 2 screws 1 and remove the set screw collar 1 thrust washer 2 lower shaft bushing 3 and thrust washer 2 2 Remove the 2 r...

Страница 49: ...2 30 Needle bar presser mechanism Upper shaft mechanism location diagram Main unit ...

Страница 50: ...and detach the bushing presser 2 3 Remove the timing belt 3 and the upper shaft 4 4 Remove the fixed joint 1 from the upper shaft 4 2 4 3 1 1 x 2 2 x 2 3 2 Pulley removal 1 Remove the pulley 1 1 3 Upper shaft pulley removal 1 Remove retaining ring E6 and remove the upper shaft pulley 1 1 Retaining ring E6 4 Tension pulley assembly removal 1 Remove the screw 1 and remove the tension pulley assembly...

Страница 51: ... 2 Remove the 4 screws 2 and detach the presser plate A 1 and the presser plate B 2 3 Remove the needle presser module 4 Detach the shaft 3 from the needle presser module 1 1 3 2 2 6 Wire assy removal 1 Remove retaining ring E3 2 Remove retaining ring E4 and remove the wire assy 1 Retaining ring E3 Retaining ring E4 1 ...

Страница 52: ...Needle bar presser mechanism Upper shaft mechanism Main unit Disassembly 7 Plate spring removal 1 Remove the adjusting screw 1 2 Remove the 2 screws 1 and remove the plate spring 2 1 1 2 Rear view Front view ...

Страница 53: ...2 34 Needle presser module breakout diagram 78 Modules ...

Страница 54: ...y removal 1 Remove the screw 1 and detach the presser feed holder assy 1 1 1 3 Adjusting plate assy removal 1 Remove the 2 screws 1 and remove the adjusting plate assy 1 1 1 4 Adjusting plate ASSY disassembly 1 Remove the retaining ring E3 and detach the tension releaser C 1 2 Remove the 2 screws 1 and detach wire guide plate U 2 1 Retaining ring E3 2 1 ...

Страница 55: ...t removal 1 Remove the screw 1 and remove the zigzag adjusting nut 1 1 1 7 Presser dial removal 1 Remove the screw 1 and remove the spring plate 1 2 Remove the retaining ring E4 and then remove the presser dial 2 the presser dial gear shaft assy 3 and the presser dial gear 4 2 1 Retaining ring E4 1 4 2 3 ...

Страница 56: ...les Disassembly 8 Spring guard removal 1 Remove the screw 1 and remove the spring guard 1 1 1 9 Spring needle bar hook stand spring removal 1 Remove and S42 S10 S10 S42 10 Lock nut removal 1 Remove the lock nut 1 and the screw 1 1 1 ...

Страница 57: ... release lever 1 release lever shaft 2 and polyester slider 3 Remove screws 2 two and remove the release adjuster 3 from the release lever 4 Remove retaining ring E2 from the release lever shaft 1 3 2 S40 2 1 S40 12 Release guide plate removal 1 Remove screws 1 and remove the release guide plate 1 1 1 ...

Страница 58: ...bar assy disassembly 1 Remove the screw 1 2 Remove the screw 2 and then remove the needle thread guide spring 1 the needle block 2 and the needle bar thread guide 3 3 Remove the needle thread plate 4 from the needle block 2 1 2 4 3 2 1 15 Needle holder shaft block removal 1 Remove the screw 1 and then remove he needle holder shaft block 1 and the needle holder block 2 2 Remove the upper unit suppo...

Страница 59: ...ove the shaft 2 3 Remove the shaft 3 4 Remove the needle bar supporter assy 4 Key point Move the Z zigzag lever assy to the right 2 3 4 1 1 2 18 Lever AB assy removal 1 Remove retaining ring E2 2 Remove the screw 1 and remove the lever guide shaft 1 3 Remove the lever presser plate 2 lever AB assy 3 and the retaining ring E2 from the lever guide shaft 1 1 Retaining ring E2 1 3 Retaining ring E2 2 ...

Страница 60: ...ring from the lever A assy 1 2 Remove the cap 3 from the lever B 2 Retaining ring E3 1 2 3 S08 S08 20 Shaft bushing A removal 1 Remove the screw 1 and detach the shaft bushing A 1 1 1 21 Thread guide plate removal 1 Remove the thread guide pate 1 1 22 Hook release plate removal 1 Remove the screw 1 and detach the hook release plate 1 1 1 ...

Страница 61: ...link A assy and link B 24 Presser foot lifter removal 1 Remove the retaining ring E4 2 Lift up the presser bar clamp 1 and then remove the lifter assembly 2 and the lifter 3 and then remove the washer 4 3 Remove the presser lift shaft 5 and then remove the retaining ring E4 Retaining ring E4 1 4 5 Retaining ring E4 2 3 ...

Страница 62: ... 2 1 2 26 Thread take up counter weight removal 1 Remove the 2 screws 1 and thread take up counter weight 1 thrust washer unit shaft 2 and thrust washer 2 Remove the retaining ring E6 from the unit shaft 2 2 1 1 Retaining ring E6 27 Z zigzag lever and thread releaser assy removal 1 Remove the retaining ring E3 2 Detach the Z zigzag lever 1 and the thread releaser assy 2 3 Remove the Z lever cup 3 ...

Страница 63: ...am 1 1 Retaining ring E2 29 Z pulse motor removal 1 Remove the screw 1 and detach the Z pulse motor ZPMSMJ35 4840 A 1 1 1 30 Thread release lever assy removal 1 Remove thte retaining ring E3 2 Remove the thread release lever assy 1 and the polyester slider 1 Retaining ring E3 31 Remove the shaft 1 Remove the shaft 1 1 ...

Страница 64: ... 1 1 33 Presser bar removal 1 Remove the screw 1 from the presser bar clamp assembly 1 and then pull the presser bar downward 2 Remove the presser bar clamp assembly 1 and spring 3 Remove the screw 2 and then remove the plate spring 2 and the presser bar bushing 3 1 1 S07 3 2 2 1 S07 ...

Страница 65: ...link removal 1 Remove the screw 1 2 Remove the retaining ring E4 and remove the shaft 1 spring and thread take up lever link 2 2 Retaining ring E4 1 S06 1 S06 35 Shaft bushing assembly removal 1 Remove the 2 screws 1 and remove the shaft bushing assembly 1 1 1 ...

Страница 66: ...2 47 Disassembly Feed and bobbin module breakout diagram Modules ...

Страница 67: ...2 Needle plate A disassembly 1 Remove the screw 1 and then remove the F gear stopper plate 1 2 Remove the 2 screws 2 and then remove the needle plate B support plate 2 and the stopper plate 3 1 2 2 1 3 3 Feed dog removal 1 Remove the 2 screws 1 and remove the feed dog 1 1 1 4 FPM spring removal 1 Remove the spring S16 S16 ...

Страница 68: ...5 4840 C 1 2 Remove the rubber from the FPM holder assy 2 1 2 1 7 Inner rotary hook bracket assy removal 1 Remove the screw 1 and remove the inner rotary hook bracket assy 1 1 1 8 Outer rotary hook assy removal 1 Remove the screw 1 and remove the outer rotary hook shaft 1 spacer 2 outer rotary hook assy 3 washer 6 4 and the spacer 5 NOTE Spacer and washer 6 attachment order outer rotary hook shaft...

Страница 69: ...oval 1 Remove the 2 screws 1 and remove the 2 feed bar shaft A 1 2 Remove the feed bar 2 1 1 1 1 2 11 Vertical adjusting screw removal 1 Remove the vertical adjusting screw 1 2 Remove the M5 nut 2 from the vertical adjusting screw 1 2 1 1 12 Feed supporting plate spring removal 1 Remove the spring S12 S12 ...

Страница 70: ... remove the bushing presser A 2 3 Remove the lower shaft B assy 3 4 Remove the bushing supporter A 4 from the feed base 1 1 2 3 2 4 14 Lower shaft B assy disassembly 1 Remove the retaining ring E6 and remove the thrust washer 1 lower shaft bushing 2 and thrust washer 1 2 Remove the 2 screws 1 and remove the set screw collar 3 2 1 Retaining ring E6 1 3 ...

Страница 71: ...1 1 17 Feed arm assembly removal 1 Remove the retaining ring E5 of the horizontal feed shaft 1 2 Pull the horizontal feed shaft 1 to the left to remove it and then remove the 2 thrust washers 2 3 Remove the feed arm assembly from the bottom of the feed rotary hook module Key point Remove the rectangular feed slide shaft of feed arm B 3 on the top of the feed arm assembly from the feed adjuster 4 1...

Страница 72: ...E3 and remove the feed arm B assy 1 and the polyester slider 2 Remove the retaining ring E2 and remove the feed supporting plate assy 2 from the feed arm B assy 1 1 Retaining ring E3 1 2 Retaining ring E2 19 Stopper plate block assy removal 1 Remove the screw 1 and remove the stopper plate block assy 1 1 1 ...

Страница 73: ...ushing supporter assy 1 feed adjuster assembly 2 spring and polyester slider 2 1 1 2 S14 1 S14 21 Feed adjuster assembly disassembly 1 Remove the spring and detach the F gear 1 1 S13 1 S13 22 Bushing presser B removal 1 Remove the 3 screws 1 and remove the bushing presser B 1 and the lower shaft bushing 2 1 1 2 ...

Страница 74: ...aft 1 polyester slider set screw collar 4 2 and spring 3 Remove the retaining ring E3 from the vertical feed shaft 1 1 S18 1 Retaining ring E3 2 Retaining ring E3 S18 25 Drop knob removal 1 Remove the screws 1 and remove the spring plate 1 2 Remove the 2 retaining rings E2 and remove the 2 slide shafts B 2 and the drop knob 3 3 Remove the 2 retaining rings E2 from the 2 slide shafts B 2 2 Retainin...

Страница 75: ...2 56 Thread cutter module breakout diagram Modules ...

Страница 76: ... thread cutter frame assembly 1 2 collars 2 and polyester slider 3 2 Remove the wave shape spring washer 4 1 1 2 2 3 4 2 Photo transistor assembly removal 1 Remove the 2 screws 1 and then remove the photo transistor assembly 1 1 1 3 Presser plate removal 1 Remove the screw 1 and then remove the presser plate 1 and spring 2 1 1 2 ...

Страница 77: ...ead cutter 2 from the cutter holder assembly 1 1 2 5 Thread hook assy disassembly 1 Remove the retaining ring E4 and remove the polyester slider 1 polyester slider 2 and the thread hook assy 3 2 Detach the spacer 4 4 3 Retaining ring E4 1 2 6 Rubber removal 1 Remove the retaining ring E2 and remove the rubber 1 1 Retaining ring E2 ...

Страница 78: ...sassembly 1 Remove the screw 1 and remove the thread cutter lever gear 1 1 1 9 Idle gear A and idle gear B removal 1 Remove the retaining ring E2 and remove the idle gear A 1 idle gear B 2 and spring 3 Retaining ring E2 1 2 3 10 Pulse motor C removal 1 Remove the 2 screws 1 and then remove the pulse motor C CPMSMJ35 4840 B 1 Key point Cut the band 1 1 ...

Страница 79: ...2 60 ...

Страница 80: ...t Needle bar presser mechanism upper shaft mechanism 3 2 Rotary hook drive mechanism Feed and bobbin mechanism Cutter assy 3 7 Bobbin winder mechanism 3 11 Thread tension mechanism 3 15 Electrical parts and motors 3 23 Main parts 3 30 Modules Needle presser module 3 41 Feed module 3 60 Thread cutter module 3 76 ...

Страница 81: ...3 2 Needle bar presser mechanism upper shaft mechanism location diagram Main unit ...

Страница 82: ...y point Tighten adjusting screw 2 so that the screw threads are completely hidden 1 Torque 1 18 1 57 N m 1 2 1 Front view Rear view Screw Bind M4X5 2 Wire assy attachment lifter assy 1 Insert the fitting 1 on the spring side on the end of the wire assy into the wire holder 2 on the lifter assy and attach retaining ring E4 2 Attach the hook 3 on the end of the wire assy to the lifter assy shaft and...

Страница 83: ...r plate A 3 with the 2 screws 1 4 Attach the presser plate B 4 with the 2 screws 1 5 Tighten the screw 2 temporarily Fully tighten the screw after performing 4 12 Clearance between the needle and the rotary hook point adjustment 1 Torque 1 47 1 98 N m 2 Torque 0 78 1 18 N m 2 3 1 4 1 Retaining ring E5 2 Taptite Bind S M4X10 Screw Pan S P washer M3X16A 4 Upper shaft pulley attachment 1 Align the ba...

Страница 84: ...3 6 Upper shaft assy attachment 1 Attach the fixed joint 1 to the upper shaft Key point Attach so that the fixed joint 1 screw holes are toward the left side 2 Place the timing belt 2 around the upper shaft pulley 3 and insert the upper shaft assembly 4 3 Attach the bushing presser 5 using the screw 1 Key point Move the fixed joint 1 to the left side of the upper shaft 1 Torque 1 47 1 98 N m 1 5 S...

Страница 85: ...t 3 Key point Tighten the screws 2 in the following order 2 2 and then 2 1 Be sure to tighten the 2 screws 2 after fully tightening the 2 screws 1 on the fixed joint 4 Tap the lower shaft bushing 5 on lightly so that the upper shaft 4 turns easily Needle bar and presser unit assy and fixed joint gap 0 5 mm 1 Torque 1 37 1 79 N m 2 Torque 0 78 1 18 N m 1 0 5 mm gap 4 3 1 2 4 5 2 1 2 2 3 Set Screw S...

Страница 86: ...3 7 Assembly Rotary hook drive mechanism Feed and bobbin mechanism Cutter assy location diagram Main unit ...

Страница 87: ...pulley D 2 to the lower shaft A 1 and attach the retaining ring E6 3 Hand start the 3 screws 1 in the timing pulley D 2 Fully tighten after 4 8 Needle bar rise adjustment Key point With the lower shaft A D cut 3 facing forward secure using one of the three screw holes in the timing pulley D 2 in the forward facing position 1 Torque 1 18 1 57 N m Face forward Retaining ring E6 3 2 Retaining ring E6...

Страница 88: ...e disk 1 and attach it to the lower shaft joint 3 Rotate feed module lower shaft B and bring the solid dot on the outer rotary hook to the front directly above the D cut in lower shaft B 4 Attach the feed module attachment Key point The needle bar should be at the highest point The solid circle mark on the outer rotary hook should be forward Feed module side D cut in lower shaft B is directly abov...

Страница 89: ...ad cutting module 1 with the screws 1 and 2 2 Attach the free arm plate 2 with the 2 screws 3 1 3 Torque 1 18 1 57 N m 2 Torque 0 78 1 18 N m 1 3 Bottom view 2 2 1 Screw Bind M4X5 Screw Bind M3X5 7 Leading guide attachment 1 Attach the leading guide 1 with the screw 1 1 Torque 0 78 1 18 N m 1 1 Screw Bind M3X4 ...

Страница 90: ...3 11 Assembly Bobbin winder mechanism location diagram Main unit ...

Страница 91: ...after 3 13 5 Bobbin winder holder assembly attachment 1 Torque Hand tighten 3 1 2 1 Taptite Bind B M3X6 2 BW shaft holder assembly attachment 1 Attach the BW shaft holder assembly 1 to the bobbin winder assembly holder 2 2 Attach the spring to the BW shaft holder assembly 1 and bobbin winder assembly holder 2 S21 1 2 1 S21 2 S21 BOBBIN WINDER SPRING XZ0070 7 1 2 5 4 4 2 8 3 BW F SW assy attachment...

Страница 92: ...late left or right so that the gap between the BW shaft holder assembly 1 and the BW F SW assy 2 is 2 5 0 3 mm and fully tighten the screw 2 1 Torque 1 18 1 57 N m 2 Torque 0 78 1 18 N m 1 2 2 1 2 5 0 3mm 1 2 Screw Bind M4X8 Screw Bind M3X6 6 Bobbin presser assembly 1 Attach the bobbin presser 1 to the bobbin winder cover 2 using the screw 1 and a M3 nut Key point Set the side of the bobbin presse...

Страница 93: ...e screw 1 1 Torque 0 78 1 18 N m 1 1 Screw Bind M3X6 8 Bobbin base assembly 1 Attach the 2 NT lower thread cutters 1 and the bobbin thread cutter holder 2 to the bobbin base 3 3 1 2 9 Bobbin base attachment 1 Attach the bobbin base 1 to the bobbin winder shaft 2 Key point Attach the bobbin base 1 to position 3 2 3 1 ...

Страница 94: ...3 15 Assembly Thread tension mechanism location diagram Main unit ...

Страница 95: ...assembly 2 Key point See the figure to the right for positioning 0 0 5 20 1 0 3 0 0 5 2 1 2 Thread guide wire attachment 1 Attach the thread guide wire 1 and the washer 2 using the screw 1 Key point While holding the thread guide wire 1 up tighten the screw 1 1 Torque 0 78 1 18 N m 2 1 1 Screw Pan S P washer M3X6 ...

Страница 96: ...on the thread catching spring case 4 two locations 2 Attach the thread catching spring case 1 to the thread guard assembly 6 using the screw 1 Key point Align the protrusions 4 two on the bottom of the thread catching spring case 1 with the oval hole 5 in the thread guard assembly and turn clockwise to the end of the hole to attach 1 Torque 0 78 1 18 N m S11 1 1 2 S11 2 3 4 1 S11 1 1 6 5 S11 S11 S...

Страница 97: ...n adjusting screw 6 into the tension plate assy Key point The tension adjusting screw 6 should be screwed in so that the tip protrudes approximately 0 5 mm from the right of the tension plate assy 7 3 Attach the rubber 8 to the initial adjusting plate 9 4 Install the screw 1 into the initial adjusting plate 9 1 Torque 0 78 1 18 N m S05 7 9 1 3 S05 6 5 4 2 1 8 S05 Screw Bind M3X4 12 5 6 9 THREAD TE...

Страница 98: ... tension gear cover 3 Turn the thread tension gear cover 3 clockwise until the large holes 5 in the thread tension gear 1 and the thread tension gear cover 3 are on top of each other and attach the thread tension gear assembly 1 2 3 4 5 Retaining ring E3 7 Thread guide attachment 1 Attach the thread guide 1 using the screw 1 1 Torque 0 78 1 18 N m 1 1 Screw Bind M3X4 8 Plate assembly attachment 1 ...

Страница 99: ...hread guide shutter link 2 to the tension release holder assy and the attach the retaining ring E3 3 Attach the spring to the thread guide shutter link 2 and the tension release holder assy S19 2 Retaining ring E3 S19 1 S19 16 SPRING XC2650 11 PF F SW assy assembly 1 Attach the PF F SW assy 1 and the presser switch holder 3 to the thread release holder assy 2 using the screw 1 Key point Align the ...

Страница 100: ...ension plate 4 4 Install the screw 1 in the tension release cam 3 5 Hand start the screw 2 in the tension pressure assy 2 after assembly perform 4 14 Fine tension adjustment 6 Attach the spring to the tension release holder assy shaft and attach the retaining washer E2 1 Torque 0 78 1 18 N m 2 Amount screw should be tightened Screw head should protrude 0 2 5 0 mm S02 S03 Retaining ring E2 2 3 S03 ...

Страница 101: ...N m 2 Torque 0 78 1 18 N m 2 4 3 1 1 2 Taptite Bind B M3X6 Screw Pan S P washer M3X6 16 Thread tension assy attachment 1 Attach the thread tension assy 1 using the 2 screws 1 Key point For the position of the thread release lever assy A 2 see the diagram to the right 2 Attach the spring to the tension release holder shaft and tension release plate C 3 on the needle presser module 1 Torque 1 18 1 5...

Страница 102: ...3 23 Assembly Electrical parts and motors location diagram Main unit ...

Страница 103: ...insulation sheet 3 to the PCB holder 1 using the 2 screws 2 1 Torque 0 78 1 18 N m 2 Torque 0 59 0 78 N m 2 3 1 1 2 Screw Bind M4X8 Taptite Bind B M3X8 2 Main PCB assy attachment 1 Attach the main PCB assy 1 to the PCB holder and arm bed using the 2 screws 1 and the screw 2 1 Torque 0 59 0 78 N m 2 Torque 0 78 1 18 N m 2 1 1 Taptite Bind B M3X8 Screw Bind M4X8 ...

Страница 104: ... Key point Align the match marks on the side feed gear and the S pulse motor gear 4 Attach the rubber 5 Attach the S stopper 5 using screw 2 6 Attach the side feed arm assy 6 and plate spring A 7 using screw 3 7 Attach the side feed adjust plate 8 washer and plate spring B 9 using screw 4 1 Torque 0 79 1 18 N m 2 3 Torque 0 79 1 18 N m 4 Torque 0 79 1 18 N m S41 1 1 2 Retaining ring E3 4 3 S41 5 2...

Страница 105: ...les on the fender rubber 1 3 Attach the main motor 4 and the motor spacer presser 5 to the motor holder 2 with the 2 screws 1 1 Torque 1 18 1 57 N m 4 2 5 1 1 3 Screw Pan S P washer M4X14 6 Main motor assembly attachment 1 Attach the timing belt 1 to the upper shaft timing pulley and the motor pulley align the main motor assembly 2 with the arm bed and hand start the 2 screws 1 Fully tighten after...

Страница 106: ...sy 1 to the base plate using the screws the screw 1 2 Attach the base plate cover 2 to the base plate with the 2 screws 2 1 Torque 1 18 1 57 N m 2 Torque 0 78 1 18 N m 2 2 2 1 1 Screw Bind M4X6 Screw Bind M3X5 10 Knee lifter assembly attachment 1 Attach the knee lifter assembly 1 with the 5 screws 1 1 1 11 Base plate attachment 1 Attach the base plate assembly 1 to the arm bed using the 3 screws 1...

Страница 107: ...ide with two M8 nuts on it to the wire holder 2 on the knee lifter assy and hand tighten the M8 nut 3 on the lower side Fully tighten after 4 21 Knee lifter adjustment 2 Attach the hook 4 on the end of the wire assy to the knee lifter assy shaft and attach retaining ring E3 3 4 Retaining ring E3 1 2 14 PBC unit LED lamp FL attachment 1 Attach the PBC unit LED lamp FL 1 to the needle presser module...

Страница 108: ... Main unit Assembly 16 Lead assembly BH cable F attachment 1 Attach the lead assembly BH cable F 1 to the connector on the BH switch assembly 2 2 Refer to Chapter 6 Special Instructions of Wiring for cord treatment of each section 1 2 ...

Страница 109: ...3 30 Main parts location diagram Main unit ...

Страница 110: ...embly and attachment 1 Attach the handle handle holder and polyester slider to the handle shafts and attach 2 retaining rings E4 2 Attach the handle to the arm bed using the 2 screws 1 1 Torque 1 47 1 96 N m Retaining ring E4 1 Taptite Bind S M4X10 ...

Страница 111: ...aught in section 2 3 Attach the rear cover being careful to avoid the switch 5 being caught in section 4 and then attach the hook 6 to the base plate 4 Attach the rear cover being careful to avoid the presser lever 1 being caught in section 7 5 Secure the rear cover to the arm bed with the screw 1 1 Torque 0 78 1 18 N m 6 1 5 7 1 4 3 2 Screw Bind M4X8 ...

Страница 112: ...nt Align VR1 on the SS VR PCB assembly with the SV joint plate 3 Connect the connector of the PCB unit LED lamp FR 5 to the SS VR PCB assembly 4 4 Cover the cord of the PCB unit LED lamp FR 5 with the insulation sheet 6 Secure the SS VR PCB assembly 4 and the SS VR insulation sheet 6 with the 2 screws 2 and then attach these to the front cover 5 Pass the lamp of the PCB unit LED lamp FR 5 through ...

Страница 113: ... 3 Taptite Cup B M3X10 Taptite Bind B M3X8 6 Front cover assembly assembling bobbin winder guide assembly 1 Attach the bobbin winder guide assembly 1 to the front cover 2 Hand start the screw 1 Fully tighten after 4 18 Bobbin winder adjustment 1 Torque 0 57 0 78 N m 1 1 Screw Pan S P washer M3X8DA 7 Indication panel attachment 1 Attach the indication plate assembly 1 to the front cover Key point I...

Страница 114: ...f the single light guide assembly 1 passes upper the right groove 4 of the operation PCB holder 3 2 Attach the operation PCB holder assembly 5 to the front cover with the 4 screws 2 Key point Hang the operation PCB holder assembly 5 over the 2 hooks 6 at the upper section of the front cover 3 Attach the rubber key 7 to the operation PCB holder assembly 5 1 2 Torque 0 39 0 79 N m 7 1 1 2 2 1 3 6 2 ...

Страница 115: ...ide 3 of the operation PCB holder 4 2 Attach the operation PCB assembly 2 to the operation PCB holder 4 with the 4 screws 1 3 Connect the connector 5 and the FFC 6 on the operation PCB assembly 2 Key point Pull up the lock of the connector on the operation PCB assembly 2 to release it insert the FFC 6 and then push down the lock to secure the cord 1 Torque 0 39 0 79 N m 5 1 2 6 1 4 3 Taptite Bind ...

Страница 116: ... the bottom plate and 2 hooks 4 with the rear cover and then secure the front cover with the 3 screws 1 Key point Check that the bobbin winder cover is at the upper section of the front cover 3 Tighten the screw 2 Key point Secure both the thread guard assembly and the groove on the front cover with the screw 2 1 Torque 0 78 1 18 N m 2 Torque 0 57 0 78 N m 1 4 3 2 1 2 Taptite Bind B M4X14 Screw Pa...

Страница 117: ... 1 using the screw 1 1 Torque 0 78 1 18 N m 1 1 Screw Bind M3X4 13 Assembling needle plate B assy 1 Attach the slide button 1 to the needle plate B 2 2 Attach the NT lower thread cutter 3 and the spring plate 4 to the cutter cover 5 3 Attach the cutter cover 5 to the needle plate B 2 1 4 3 5 2 14 Needle plate B assy attachment 1 Attach the needle plate B assy 1 to the main unit 2 Attach the needle...

Страница 118: ...ith the screw 3 6 Attach the needle thread lever knob 8 1 3 Torque 0 29 0 34 N m 2 Torque 0 29 0 34 N m S01 2 5 7 S01 6 2 1 3 4 1 3 8 S01 Taptite Pan B M3X6 Taptite Bind B M3X10 THREAD THROUGH LEVER SPRING 138260 23 4 16 Face plate assy attachment 1 Secure the face plate assy 1 to the arm bed with the screw 1 Key point Align and attach the hole in the center on the inside of the face plate assy 1 ...

Страница 119: ...3 40 Main unit Main parts 18 Accessory table assembly and attachment 1 Attach the accessory table door to the accessory table 1 2 Attach the accessory table 1 to the main unit 1 ...

Страница 120: ...3 41 Assembly Needle presser module breakout diagram 78 Modules ...

Страница 121: ...Apply a small amount of MOLYKOTE EM30L to the shaft hole in the thread take up lever link 2 Attach the shaft 1 spring and thread take up lever link 2 to the upper unit holder and attach retaining ring E4 3 Install the screw 1 in the shaft 1 Apply MOLYKOTE EM30L all the way around the shaft hole in the thread take up lever link small amount XC8385 1 Torque 0 49 N m S06 2 Retaining ring E4 1 S06 1 1...

Страница 122: ...lamp 5 into the presser bar 3 Key point Engage the stopper pin 6 of the presser bar clamp 5 with the groove on the stopper pin of the unit holder 9 Pass the presser bar 3 through to the presser bar bushing 1 Dip the tip of the presser bar opposite end from the retaining ring in FBK OIL RO 100 Dipping XC8388 Apply MOLYKOTE EM30L to the groove on the stopper pin of the unit holder Bead XC8385 1 Torq...

Страница 123: ... release lever assy 2 and polyester slider to the upper unit holder and attach retaining ring E3 Key point The side of the thread release lever assy 2 with the hole 3 is the bottom Align the pin on the thread release lever assy 2 with the cam groove 4 in the T cam Apply MOLYKOTE EM30L to the thread release attachment hole Small amount XC8385 Apply MOLYKOTE EM30L to thread release assembly shaft Sm...

Страница 124: ...ount of MOLYKOTE EM30L to the Z zigzag cam 1 gear part and cam part Apply MOLYKOTE EM30L to all of the sliding part of the Z zigzag cam pin Small amount XC8385 Apply MOLYKOTE EM30L to all of the Z zigzag cam Small amount XC8385 Apply MOLYKOTE EM30L all around the Z zigzag cam gear Small amount XC8385 3 Retaining ring E2 1 2 9 Thread releaser assy attachment 1 Apply MOLYKOTE EM30L to the thread rel...

Страница 125: ... 1 11 Thread take up counter weight attachment 1 Attach the retaining ring E6 to the unit shaft 1 2 Attach the thrust washer 2 unit shaft 1 thrust washer 2 to the shaft bushing assembly 3 3 Attach the thread take up counter weight 4 using the 2 screws 1 Key point Align the screw hole 5 in the thread take up counter weight 4 and the unit shaft D cut surface 6 4 Lubricate part 7 of the shaft bushing...

Страница 126: ...e screw hole 6 on the thread take up counter weight 6 Fully tighten the 2 screws 1 temporarily attached to the thread take up counter weight 4 7 Insert the calking shaft of the thread take up lever assembly 2 into the shaft hole on the thread take up lever link 7 8 Insert the calking shaft shorter of the needle bar crank 1 into the shaft hole on the thread take up lever assembly 2 and then tighten...

Страница 127: ... 4 to the presser lift shaft 1 5 Lift up the presser bar clamp 3 and then attach the lifter assembly 5 and the presser foot lifter 6 to the presser lift shaft 1 6 Attach the retaining ring E4 to the presser lift shaft 1 Apply MOLYKOTE EM30L to the operating surface of the presser lifter shaft presser foot lifter Small amount XC8385 Apply MOLYKOTE EM30L to the operating surface of the presser foot ...

Страница 128: ...hape of the threader hook assy 1 shaft hole and attach the threader hook assy 1 to the needle thread shaft A 5 Key point Assemble the link A assembly 2 link B assembly 3 and thread guide assembly 4 so that a triangle is formed 4 3 1 3 2 4 5 2 1 15 Hook release plate attachment 1 Attach the hook release plate 1 to the needle bar supporter assy 2 the screw 1 1 Torque 0 29 0 49 N m 1 1 2 Screw Bind M...

Страница 129: ...nt 1 Attach the shaft bushing A 1 to the upper unit holder using the screw 1 1 Torque 0 78 1 18 N m 1 1 Taptite Bind B M3X8 18 Assembling the Lever AB assy 1 Attach the cap 2 to the lever B 1 2 Attach the lever B 1 and the spring to the lever A assembly 3 and then attach the retaining ring E3 S08 Retaining ring E3 3 1 2 S08 S08 4 4 5 TORSION SPRING XC2460 ...

Страница 130: ...387 Apply MOLYKOTE EM30L to the full width of the slide lever groove Small amount XC8385 Apply MOLYKOTE EM30L to the operating surfaces of the lever B cap and the thread guide slider Small amount XC8385 1 Torque 0 78 1 18 N m 1 Retaining ring E2 1 2 Retaining ring E2 3 1 3 Taptite Bind B M3X6 20 Needle bar supporter assy attachment 1 Attach the needle bar supporter assy 1 to the upper unit holder ...

Страница 131: ...edle holder block 3 to the needle bar supporter assy needle roller 2 Key point The flat surface of the needle holder block is the bottom 4 Apply a small amount of EPNOC AP N 0 to the shaft assy 4 shaft 5 Attach the shaft assy 4 to the needle holder block 3 and upper unit holder and hand start an the screw 1 Fully tighten after 4 11 Needle interference left right adjustment Apply EPNOC AP N 0 to th...

Страница 132: ...the needle bar with the screw 1 3 Attach the screw 2 Key point With the needle bar groove facing forward the screw 2 is on the right side There should no gap 5 between the tip of the thread guide spring 4 and needle bar thread guide 3 There should be a 0 3 mm 0 65 mm gap between the needle bar thread guide 3 and needle block 2 1 Torque 0 39 1 78 N m 2 5 3 4 4 2 1 3 1 2 0 3mm to 0 65mm 2 3 Screw SM...

Страница 133: ... 1 and the needle bar block 4 to approximately 2 mm When the needle thread block 1 is viewed from the front it is secured in a position turned slightly counterclockwise see 4 29 Adjust the needle thread block Lubricate the needle bar crank joint area with Molykote Sewing Lube 90 Molykote dispersion 1 2 drops Apply Epnoc Grease AP to the sliding pin part of the needle thread block Small amount Lubr...

Страница 134: ...lever 2 using screw 2 4 Attach 1 Torque Hand tighten 2 Torque 0 79 1 18 N m S40 2 1 1 S40 3 2 2 S40 Screw Pan T washer M3X6 Color Silver Screw Pan S P washer M3X6F Color Silver RELEASE LEVER SPRING XC3448 2 9 3 6 27 Lock nut attachment 1 Attach the screw 1 to the lock nut 1 Key point The screw 1 in approximately half its length 2 Install the screw 1 in the upper unit holder Key point Tighten until...

Страница 135: ...t Connect the side with the short hook to the needle bar supporter assy plate 1 and the long side to the upper unit holder 2 Attach to the needle bar supporter assy plate 1 and release guide plate 2 S10 S42 S42 S10 1 2 S10 S42 SPRING XC2429 24 5 SPRING XC6252 A decided hook form is the same 29 4 29 Spring guard attachment 1 Attach the spring guard 1 with the screw 1 1 1 ...

Страница 136: ...ser dial 2 hole 3 2 Attach the presser dial gear 4 Key point Align the presser dial gear 4 match mark 5 and the first indentation 7 from the top in the tension spring receiving gear 6 3 Attach the presser dial assy Key point Align the presser dial shaft assy 1 D cut 3 and the presser dial gear 4 D cut 4 Attach the spring plate 8 to the upper unit holder using the screw 1 1 Torque 0 78 1 18 N m 1 2...

Страница 137: ...the right Apply EPNOC AP N 0 to the zigzag adjusting nut Z zigzag lever contact surface Small amount XC8387 1 Torque 0 78 1 18 N m 1 1 1 Bolt Socket M4X25 32 Spring Z attachment 1 Attach the spring to the upper unit holder 1 and the needle bar supporter assy 2 S20 2 1 S20 S20 14 3 5 A decided hook form is the same SPRING Z XC2748 33 Adjusting plate assy assembly 1 Attach tension release plate C 1 ...

Страница 138: ...2 and attach Align the presser lifter shaft and the adjusting plate assy hole 3 1 Torque 1 18 1 57 N m 1 1 Taptite Bind B M4X10 35 Presser feed holder assy attachment 1 Attach the presser feed holder assy 1 to the presser bar using the screw 1 1 Torque 1 18 1 57 N m 1 1 Screw 3 57 36 BH switch assy attachment 1 Attach the BH switch assy 1 to the upper unit holder using the screw 1 1 Torque 1 18 1 ...

Страница 139: ...3 60 Feed module breakout diagram Modules ...

Страница 140: ...ing ring E2 Retaining ring E2 Retaining ring E2 4 1 Screw Bind M3X4 2 Drop assy assembly 1 Attach the retaining ring E3 to the vertical feed shaft 1 2 Attach the vertical feed shaft assy 1 polyester slider 2 set screw collar 4 3 vertical lever 4 and spring to the vertical supporting plate 5 and attach retaining ring E3 3 Hand start the screw 1 in the set screw collar 4 3 Fully tighten after 3 67 1...

Страница 141: ...2 Lubricate the lower shaft bushing 1 with 1 2 drops of FBK OIL RO 100 Lubricate the lower shaft bushing round surface with FBK OIL RO 100 1 2 drops XC8388 1 Torque 0 78 1 18 N m 2 1 1 Screw Bind M4X5 5 Feed adjuster assembly 1 Apply a small amount of EPNOC AP N 0 to the F gear 1 2 Align the F gear 1 and the feed adjuster assy 2 and attach spring Apply EPNOC AP N 0 to the entire operating surface ...

Страница 142: ...ter assy 3 and feed adjuster assy 2 to the feed base 4 using the screws 1 two Lubricate the feed adjuster assembly shaft with FBK OIL RO 100 1 2 drops XC8388 Apply EPNOC AP N 0 to the entire operating part of the feed adjuster feed regulator slide block Small amount XC8387 1 Torque 1 18 1 57 N m S14 3 4 1 1 S14 3 2 S14 S14 Screw Bind M4X6 SPRING XC2531 8 8 9 9 5 5 7 Stopper plate block assy attach...

Страница 143: ...t with 1 2 drops of FBK OIL RO 100 3 Attach the feed arm B assy 1 and the polyester slider 3 to the feed arm A 4 and the attach retaining ring E3 4 Lubricate the feed arm B assy 1 with 1 2 drops of FBK OIL RO 100 Lubricate the feed supporting plate assy shaft with FBK OIL RO 100 1 2 drops XC8388 Lubricate the feed arm B assy with FBK OIL RO 100 1 2 drops XC8388 1 2 Retaining ring E2 Retaining ring...

Страница 144: ... base plate 7 Attach the retaining ring E5 between right feed arm A and the base plate Key point Move the retaining ring E5 to feed arm A so that it can secure the thrust washer 5 8 Apply 1 or 2 drops of sewing lubricant to the 2 sections 6 where the horizontal feed shaft is inserted in feed arm A Apply OILER B ASSYto the 2 sections where the horizontal feed shaft is inserted in feed arm A 1 2 dro...

Страница 145: ...lower shaft bushing 3 and thrust washer 2 to the lower shaft B assy 4 and attach retaining ring E6 Key point Attach the set screw collar 1 with the ground surface facing the lower shaft bushing 3 2 Install the 2 screws 1 in the set screw collar 1 Key point Attach the set screw collar 1 in a position that allows the lower shaft bushing 3 to turn smoothly 3 Lubricate the lower shaft bushing 3 with 1...

Страница 146: ... B assy 1 5 Adjust the right left position of the set screw collar 4 7 so that there is a gap between the vertical lever 8 and the drop knob 9 and so that the contact area of the vertical lever 8 does not come off of the vertical feed cam of the vertical lever 8 and fully tighten the screw 3 Lubricate the lower shaft inserted side of bushing supporter assy with OILER B ASSY 1 2 drops XZ0206 1 Torq...

Страница 147: ...n 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 to the lower shaft gear 4 Apply EPNOC AP N 0 to the vertical rod seat Small amount XC8387 Apply EPNOC AP N 0 to the vertical feed cam surface Small amount XC8387 Apply EPNOC AP N 0 to the horizontal feed cam surface Small amount XC8387 Apply MOLYKOTE EM30L...

Страница 148: ...bottom of the M5 nut 1 touches the feed bar 4 Upper surface meets 2 3 4 1 17 Feed bar attachment 1 Apply a small amount Molykote EM30L to the 2 shaft holes 1 in the feed bar 2 Attach the feed bar 2 and feed bar shaft A 3 to the feed arm A 4 using the 2 screws 1 Key point Feed bar shaft A 3 is attached from the inside of the feed bar 2 Apply MOLYKOTE EM30L to feed shaft holes in the feed bar Small ...

Страница 149: ...ter 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 With the D cut 6 in the lower shaft B facing upward attach so that the solid dot 7 on the rotary hook assy faces forward Attach from a position where 7 is 45 deg to the right 3 Install the screw 1 in the shaft supporter Apply MOLYKOTE EM30L to the shaft supporter su...

Страница 150: ...osition adjustment 1 Torque 0 78 1 18 N m 1 1 Screw Bind M2 6X3 21 Assembling F pulse motor assembly 1 Attach the rubber 1 to the FPM holder assy 2 2 Attach the F pulse motor FPM35SP 9N 3 to the FPM holder assy 2 using the screws the 2 screws 1 3 Lubricate bearing 4 of the F pulse motor FPM35SP 9N 2 with FBK OIL RO 100 Lubricate the FPM bearing with FBK OIL RO 100 1 2 drops XC8388 1 Torque 0 78 1 ...

Страница 151: ...sy 5 4 Attach the spring and the screw 1 Key point To prevent the screw 1 from being tightened into the spacer at an angle tighten the screw 1 with the spring compressed Tighten the screw 1 until the screw hole in the feed base comes approximately to the center of the hole 6 in the FPM holder assy 5 Hand start the screw 2 Fully tighten after 4 17 Feed adjustment 1 2 Torque 0 27 0 48 N m S15 3 4 5 ...

Страница 152: ...d F pulse motor gear 2 are touching hold the F pulse motor gear 2 with your finger 7 so that it does not turn 4 Push the feed adjuster assy 5 until it and the F gear 8 have their gears aligned 9 5 With the gears aligned 9 push them down and mesh the feed adjuster assy 5 and F pulse motor gear 2 Key point Check that the feed adjuster assy 5 gear match mark and the F pulse motor gear 2 match mark A ...

Страница 153: ...ate with the positioning hole on the needle plate A 2 2 Attach the stopper plate 3 and then the needle plate B support plate 4 to the rear of needle plate A 2 with the 2 screws 2 Key point Engage the positioning tab on the stopper plate with the positioning hole on needle plate A 1 2 Torque 0 57 1 78 N m 1 4 2 1 3 2 Screw Bind M2 6X3 26 Feed dog attachment 1 Attach the feed dog 1 and hand start sc...

Страница 154: ...3 75 Feed module Modules Assembly 27 Needle plate A assy attachment 1 Attach the needle plate A 1 using the 2 screws 1 1 Torque 1 18 1 57 N m 1 1 Screw M4 ...

Страница 155: ...3 76 Thread cutter module breakout diagram Modules ...

Страница 156: ...f EPNOC AP N 0 to the idle gear shaft 1 2 Attach the idle gear A 2 spring 3 and idle gear B 4 to the idle gear shaft 1 and attach the retaining ring E2 Key point Insert the spring 3 into the small holes 5 in the idle gear A 2 and the idle gear B 4 and turn the idle gear A 2 clockwise until the large holes 6 in the idle gear A 2 and the idle gear B 4 overlap 7 With the large holes 6 aligned align t...

Страница 157: ...0 to the thread cutter lever shaft 2 Attach the thread cutter lever assy 1 to the thread cutter lever shaft Key point Align the thread cutter lever assy 1 match mark 2 with the idle gear assy 4 match mark 3 Apply a small amount of EPNOC AP N 0 to the thread cutter lever shaft Small amount XC8387 3 2 1 4 5 Rubber and spacer attachment 1 Attach the rubber 1 to the thread cutter frame 2 shaft and att...

Страница 158: ...e retaining ring E4 2 1 Retaining ring E4 5 4 3 7 Cutter holder assembly attachment 1 Attach the NT lower thread cutter 2 to the cutter holder assembly 1 2 Engage the cutter holder assembly 1 with the thread cutter frame 1 2 8 Presser plate assy attachment 1 Attach the spring 1 and the presser plate assembly 2 to the thread cutter frame with the screw 1 1 Torque 0 78 1 18 N m 1 1 2 Screw Bind M3X4...

Страница 159: ... 0 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 AP N 0 to the all of the operating surfaces 2 of the thread cutter lever gear and idle gear assy 3 Apply a small amount of EPNOC AP N 0 to the entire operating surface 3 of the thread cutter lever thread hook pin A Apply EPNOC AP N 0 to the entire operating surfaces of idle gears ...

Страница 160: ...ch the thread cutter frame assembly 5 and the 2 collars 6 to the motor holder assembly 7 with the 2 screws 1 Key point Align the thread cutter lever shaft 8 with the reference hole 9 on thread cutter frame and align thread hook pin A with the hole on the thread cutter lever 1 Torque 1 18 1 57 N m 1 5 6 6 7 1 3 2 4 8 9 Screw Bind M4X20 13 CPM lead processing 1 Attach the CPM leads to the motor hold...

Страница 161: ...3 82 ...

Страница 162: ...tension adjustment 4 14 Upper thread tension adjustment 4 15 Inner rotary hook lower thread tension adjustment 4 16 Feed adjustment 4 17 Bobbin winder uneven bobbin winding and bobbin winding amounts adjustment 4 18 BH lever switch position adjustment 4 19 Forward and back adjustment of needle and presser 4 20 Knee lifter adjustment 4 21 Side feed line adjustment 4 22 One point pattern adjustment ...

Страница 163: ...4 2 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 ...

Страница 164: ...4 3 Inspection Inspection and Adjustment Tip damage to needle 1 Touch the tip of the needle to your finger and check to be sure it does not catch ...

Страница 165: ...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 Starting and stopping operation Test mode selection screen With the front cover in place Press the switch With the front cover in place Press SW1 Return to test mode selection screen Press the button on the operation panel Main PCB assy ...

Страница 166: ...eed with each push of SW3 Feed forward and reverse With front cover in place Press select and press 100 stitches forward on the left base line 100 stitches reverse on the right baseline Switches low middle high speed with each push of the Without front cover in place SW3 Switches low middle high speed with each push of SW5 Feed dog position With front cover in place Press select and press Each tim...

Страница 167: ...M4X10 screw on the tension pulley assembly 2 With a force of 1 96 N 200 g pushing on the center of the belt adjust the tension pulley assembly position for a deflection of 4 5 mm 3 Tighten the pan S P washer M4X10 screw on the tension pulley assembly XC2277001 Push pull gauge 3 N 1 96 ...

Страница 168: ...djustment 1 Loosen the upset 4 x 12 DB two in the motor holder 2 With a force of 0 98 N 100 g pushing on the center of the belt adjust the motor pulley position for a deflection of 4 5 mm 3 Tighten the upset 4 x 12 DB two in the motor holder XC2277001 Push pull gauge 3 N ...

Страница 169: ...he feed base 5 Turn the pulley by hand and set the needle bar at its lowest point 6 Draw a needle bar low point reference line on the needle bar supporter assy 7 Loosen the set screws socket FT M5X5 three on lower shaft pulley D 8 With the needle bar raised 2 9 3 3 mm from the needle bar low point reference line adjust by moving the lower shaft pulley D and lower shaft A assembly so that the right...

Страница 170: ... line position 3 Turn the power off 4 Remove the M4 screws two and remove needle plate A from the feed base 5 Hand turn the pulley until the right edge of the needle and the outer rotary hook tip meet 6 Loosen the set screw socket CP M4X4 in the needle bar hook stand assy 7 Adjust the height of the needle bar for 1 0 1 4 mm between the top of the needle hole and lower edge of the outer rotary hook...

Страница 171: ...ith the front cover in place press twice and select and press and select 3 point drop mode with each push of SW5 or the needle bar switches left base line center base line right base line 3 Turn the pulley by hand and insert the tip of the needle into the needle hole 4 Loosen the screw 3X10 5 Adjust the zigzag adjusting nut so that the left base line center base line right base needle drop is unif...

Страница 172: ...he 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 4 Tighten the screw 3X10 ...

Страница 173: ...press three times and move the needle bar to the right base line position 3 Turn the power off 4 Remove the M4 screws two and remove needle plate A from the feed base 5 Loosen the screw 3X20 6 Hand turn the pulley until the right edge of the needle and the outer rotary hook tip meet 7 Adjust the gap between the needle and the outer rotary hook tip front and back to 0 1 mm or less using the tighten...

Страница 174: ...eedle plate A 3 Loosen the set screw CP M5X10 in the presser bar clamp assy 4 Adjust the height of the presser bar so that there is 6 0 6 5 mm between the top of needle plate A and the bottom of the presser NOTE Use the J presser Adjust the presser bar so that the needle plate feed dog hole and the presser are parallel to prevent slanting during serging and damage to the needle ...

Страница 175: ...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 ...

Страница 176: ... Thread 60 through the thread guide tension plate tension disk and brake plate assembly in this order 5 Lower the presser foot lifter 6 Pull the thread with a tension gauge and adjust the tension to 0 412 to 0 461N 42 to 47g using the thread tension adjusting screw 7 Apply a small amount of screw lock agent to the thread tension adjusting screw Screw locking compound for thread tension adjusting s...

Страница 177: ...ead 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 ...

Страница 178: ...3 Press SW1 with the front cover in place and run Feed forward and reverse mode checking the forward and reverse feed amounts 4 Loosen the FPM holder assy screw 3 x 8 5 Adjust the forward and reverse feed using the FPM holder assy screw 4 x 25 6 Tighten the screw 3 x 8 Key point Confirm that when a material of two layers of broadcloth with paper in between is given 100 stitches forward and reverse...

Страница 179: ...inding 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 The target for the bobbin winding quantity is filling 80 90 of the diameter 80 90 ...

Страница 180: ...r the BH lever and set to the BH presser 6 Rotate the BH eccentric shaft so that BH0 comes into contact with BH1 Key point With the presser foot lifter raised pull the BH presser forward as much as possible and check that BH0 comes into contact with BH2 and that BH2 has some deflection With the presser foot lifter raised push the BH presser back as much as possible and check that BH0 comes into co...

Страница 181: ... 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 Tighten the lock nut ...

Страница 182: ...ews two 3 With a load of 5N 500 g applied to the lifter adjust the lifter and presser feed holder space Key point Space between lifter and presser feed holder is 2 3 mm Adjust by the amount the upper adjusting screw is tightened 4 Tighten the lower adjusting screw the presser feed holder 2 3mm the lifter 5N 500g the adjustment screws ...

Страница 183: ... should be oriented almost perfectly to the side The length of the upper side of the horseshoe pattern should be 26 31 mm 4 When the feed dog lateral position is center adjust the set screw collar in the feed module so that the vertical adjusting screw is almost perfectly vertical when viewed from the rear of the sewing machine 5 Adjust the up and down gap on the right side of the horseshoe to 4 6...

Страница 184: ...one on top of the other on the sewing machine press to work with PATTERN ADJUSTMENT and check the shape of the one touch pattern 4 If there is doubling gaps or slippage in the one touch pattern select F feed correction value or S feed correction value using or and adjust using or 17 F feed correction value S feed correction value Make a positive F correction Make a negative F correction Make a pos...

Страница 185: ...f feed dog 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 4 Press and set the left right feed dog position to center 5 Turn off the power and remove the front cover 6 Adjust the left right feed dog position 8 Feed dog ...

Страница 186: ... 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 6 Does not contact ...

Страница 187: ...erse and left right positions of the feed dog Key point Place a t 1 5 mm spacer between the feed bar and feed arm A Adjust the gap between the forward edge of the feed dog middle tooth and feed plate A front to back to 3 2 3 8 mm Adjust the left and right gaps between the feed dog and needle plate A to be approximately the same Make sure that the feed dog and needle plate A are not at an angle to ...

Страница 188: ...y the amount the vertical adjuster screw assembly is screwed in 4 Tighten the M5 nut being careful that the vertical adjuster screw assembly does not turn 5 With the feed dog in the lowest position check that the feed dog is 0 3 mm or more below the upper surface of needle plate NOTE When the feed dog is too high problems such as abnormal noise bad feed quantities and the cloth not being fed arise...

Страница 189: ...y 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 and inner rotary hook is 1 6 1 8 mm and secure with the screw bind 3x8 ...

Страница 190: ...ure the set screw socket FT 4 x 4 so that the position of the needle thread block set screw is seen to be slight to the left when viewed from the front Adjust so that the upper edge of the threading hook and the upper edge of the needle hole are at the same height NOTE If the needle thread block set screw position is too far to the left the hook will not operate and treading cannot be done Fig 1 I...

Страница 191: ...4 30 ...

Страница 192: ... motor rotation abnormal 5 8 Cannot sew pattern well 5 9 Cannot sew button holes well 5 10 Stitch length and zigzag width cannot be done by manual adjustment 5 11 Problems with vertical needle movement and reverse stitching 5 12 Does not operate when the foot controller is used 5 13 Thread tensioning does not go well 5 14 Thread cutter does not work normally 5 15 LCD display is not normal 5 16 LCD...

Страница 193: ...bnormal rotation in main motor F02 5 21 Key pressed continually with power ON operation system SW F03 5 22 Key pressed continually with power ON operation panel SW F04 5 23 FC disconnect F05 5 24 Dirty speed sensor F06 5 24 NP sensor disconnect F07 5 25 Speed VR disconnect F09 5 26 EEPROM abnormal ...

Страница 194: ...he voltages between pins 3 4 pins 5 4 and pins 6 7 of CN14 on the Main NF3D PCB assy normal Pins 3 4 5 V DC Pins 5 4 26 V DC Pins 6 7 26 V DC N N Y Replace the SS VR F2 PCB assy Does the buzzer sound when the power is turned ON with the SS VR F2 PCB assy connector disconnected from the SS VR F2 PCB assy N Y Replace operation U22 PCB assy Does the buzzer sound when the power is turned ON with the o...

Страница 195: ...pulse motor returns to starting point Regardless of needle position AT C pulse motor return to starting position Replace pulse motor Replace NP F2 PCB assy Replace main NF3D PCB assy Is the resistance between the 1 2 pins and 3 4 pins on the pulse motor connectors 4 6 Ω Regardless of needle position this pulse motor returns to the starting point Is the voltage between pins 5 4 of CN14 on the main ...

Страница 196: ...the SS VR F2 PCB assy and the operation U22 PCB assy stuck in a depressed position Pattern cannot be selected Adjust the assembly of SS VR F2 PCB assy and the operation U22 PCB assy or Replace operation U22 PCB assy or Replace SS VR F2 PCB assy Replace operation U22 PCB assy or Replace main NF3D PCB assy Y N ...

Страница 197: ...s for the Stop Start switch reverse switch raise needle switch and the thread cut switch normal Switch resistance values Switch pressed 1 Ω or less Switch released N N N N Y Is the main motor connector correctly connected to CN1 of power supply unit F Y Replace main motor Replace SS VR F2 PCB assy Is the main motor resistance 1 5 3 5 Ω Y Y To next page Main motor does not turn ...

Страница 198: ...own Is the presser switch resistance normal Presser switch resistance Switch pressed 1 Ω or less Switch released N Reconnect it correctly Is the NP F2 PCB assy connector correctly connected to CN2 on the main NF3D PCB assy N N Y Y Replace switch assy From previous page Replace operation U22 PCB assy or Replace main NF3D PCB assy or Replace power supply F ...

Страница 199: ...ace SS VR F2 PCB assy When the speed control lever is moved with the power ON does the voltage between pins 2 1 of CN1 on the operation U22 PCB assy vary 0 7 4 3 V DC N Replace NP F2 PCB assy Replace main NF3D PCB assy When the upper shaft pulley is slowly turned by hand does the voltage between pins 2 1 pins 4 1 and pins 5 1 on the main NF3D PCB assy vary 0 5 V DC N Y Y ...

Страница 200: ...d by hand does the voltage between pins 4 1 and pins 5 1 on the main NF3D PCB assy vary 0 5 V DC N Adjust the attachment of the needle presser module N Replace main NF3D PCB assy Y Y With the power OFF can you lightly move the needle bar left and right by hand Replace pulse motor N Y Is the resistance between pins 1 2 and pins 3 4 on the Z pulse motor and F pulse motor connectors 4 6 Ω ...

Страница 201: ...2 3 normal BH lever pulled forward Pins 1 2 1 Ω or less pins 2 3 BH lever pushed back Pins 1 2 pins 2 3 1 Ω or less Is the resistance between BH lever switch connector pins 4 5 normal BH lever down 1Ω or less BH lever up Change to correct presser N Replace main NF3D PCB assy Y Y Is the correct presser being used N N Y Adjust BH lever or Replace BH switch assy Adjust BH lever or Replace BH switch a...

Страница 202: ...one by manual adjustment N Y Replace main NF3D PCB assy Y Does the LCD panel display change when the manual key for stitch length and the manual key for zigzag width are turned ON and OFF normally Is the resistance between pins 1 2 and pins 3 4 on the Z pulse motor and F pulse motor connectors 4 6 Ω Replace pulse motor N Replace rubber keys or Replace operation U22 PCB assy ...

Страница 203: ...witch assy OFF When the upper shaft pulley is slowly turned by hand does the voltage between pins 2 1 pins 4 1 and pins 5 1 on the main NF3D PCB assy vary 0 5 V DC Are the resistance values for the Stop start switch reverse switch raise needle switch and the thread cut switch normal Switch resistance values Switch pressed 1 Ω or less Switch released N N N Adjust the assembly of the BW switch assy ...

Страница 204: ...ce the foot controller or Replace assy pin jack F With the foot controller connected does the resistance between pins 1 3 on the assy pin jack F connector vary from several Ω 10 kΩ when the foot controller is pressed down Is the resistance between the assy pin jack F connector pins 2 3 normal Foot controller disconnected 1 Ω or less Foot controller connected N N Y Y Replace main NF3D PCB assy ...

Страница 205: ...Use the correct combination Is the material thread and needle combination correct N Y Adjust upper thread tension or Adjust upper thread tension disk N Y Adjust inner rotary hook tension Is the inner rotary hook tension right Is the tension right or Is the thread tension adjuster gap correct N Y Replace pulse motor Is the resistance between the 1 2 pins and 3 4 pins on the AT pulse motor connector...

Страница 206: ...normally Thread cutter does not operate normally Adjust the assembly of the thread cutter module Do the thread hook assy and lever gear move easily Is the resistance between the 1 2 pins and 3 4 pins on the C pulse motor connectors 4 6 Ω N N Replace C pulse motor Y Y Replace main NF3D PCB assy ...

Страница 207: ...peration U22 PCB assy properly connected N Y Connect the operation U22 PCB assy and main NF3D PCB assy properly Are the operation U22 PCB assy and main NF3D PCB assy properly connected N Y Replace the single light guide assy or the operation U22 PCB assy Is the voltage between pins 15 14 on the operation U22 PCB assy connector CN1 approximately 5 V N Y Replace main NF3D PCB assy ...

Страница 208: ...e light guide assy backlight leads and operation U22 PCB assy properly connected N Replace the single light guide assy Is the voltage between pins 2 1 on the operation U22 PCB assy connector CN2 approximately 3 4 V N Y Connect the operation U22 PCB assy and main NF3D PCB assy properly Are the operation U22 PCB assy and main NF3D PCB assy properly connected N Y Y Replace operation U22 PCB assy or R...

Страница 209: ...ism for correct assembly and attachment Is the bobbin winder mechanism assembled and attached correctly Is the resistance between the bobbin winder assy connector pins 1 2 normal Bobbin winder shaft in bobbin wind position 1 Ω or less Bobbin winder shaft not in bobbin wind position N N Replace BW switch assy Y Y Replace main NF3D PCB assy ...

Страница 210: ...B assy and PCB Unit LED lamp FL correctly Are the main NF3D PCB assy and PCB Unit LED lamp FL correctly connected N Y Reconnect the SS VR F2 PCB assy and PCB Unit LED lamp FR correctly Are the SS VR F2 PCB assy and PCB Unit LED lamp FR correctly connected N Y Reconnect the main NF3D PCB assy and operation U22 PCB assy correctly Are the main NF3D PCB assy and operation U22 PCB assy properly connect...

Страница 211: ...n After replaceing power supply unit F start test mode and select test mode 11 Next press the BK key F01 error mode is canceled When the power is once turned off and is switched on again is it displayed as F01 Y N OK F01 is displayed Replace main NF3D PCB assy Does the motor rotate correctly N Y ...

Страница 212: ...igation for Electronic Parts Error is displayed Replace SS VR F2 PCB assy or Replace main NF3D PCB assy Is one of the SS key NP key BK key and CUT key stuck in a pressed down condition N Y Release the switch that is stuck F02 is displayed ...

Страница 213: ...tronic Parts Error is displayed Replace operation U22 PCB assy or Replace main NF3D PCB assy Is one of operation panel keys Pattern selection key etc stuck in a pressed down condition N Y Release the switch that is stuck F03 is displayed ...

Страница 214: ...k assy lead wires broken Y N F04 is displayed When the foot controller is replaced with a new one does it work correctly N Y Correctly connect the foot controller jack assy to the main NF3D PCB assy CN15 Replace the main NF3D PCB assy Is the foot controller jack assy correctly connected to the main NF3D PCB assy CN15 N Y Replace the foot controller ...

Страница 215: ... NP F2 PCB assembly is replaced with a new one does it work correctly N Y Correctly connect the NP F2 PCB assy to the main NF3D PCB assy CN2 Is the NP F2 PCB assembly correctly connected to the main NF3D PCB assy CN2 N Y Replace the NP F2 PCB assy The error message F05 or F06 is displayed on the screen ...

Страница 216: ...SS VR PCB assy correctly connected to the operation U22 PCB assy CN1 N Connect it properly Is FFC of the operation U22 PCB assy correctly connected to the main NF3D PCB assy CN8 N Y Y F07 is displayed Replace the main NF3D PCB assy Is F07 still displayed even when another SS VR F2 PCB assy is connected to the operation U22 PCB assy Replace the SS VR F2 PCB assy N Y ...

Страница 217: ...5 26 Failure Investigation for Electronic Parts Error is displayed F09 is displayed Replace the main NF3D PCB assy Y ...

Страница 218: ...6 1 6 Special Instructions of Wiring Needle bar module wiring 6 2 Thred cutter rotary hook module wiring 6 4 Side feed mechanism wiring 6 5 Main PCB assembly wiring 6 6 Front cover assembly wiring 6 8 ...

Страница 219: ...le presser module 2 Wiring on upper side of needle presser module The lead wires should be positioned above the rib Secure the lead wires with a clip Secure the lead wires with a band Hang the lead wires over the two hooks Pass the lead wires under the hook Secure the lead wires with a band ...

Страница 220: ...eedle bar module wiring 3 Wiring on right side of AT pulse motor assembly 4 Wiring on back side of arm bed Secure the end of the tube with a band Pass the lead wires through the groove Secure the lead wires with a clip The lead wires should be positioned above the rib ...

Страница 221: ...s of Wiring Thred cutter rotary hook module wiring 1 Wiring on front side of thred cutter module 2 Wiring on front side of rotary hook module Secure the wires with a band so that turn the connected section of the band inside ...

Страница 222: ...6 5 Special Instructions of Wiring Special Instructions of Wiring Side feed mechanism wiring 1 Wiring on front side of side feed mechanism assy ...

Страница 223: ...6 6 Special Instructions of Wiring Main PCB assembly wiring 1 Wiring at top side of main PCB 2 Wiring at upper section of main PCB Pass the lead wires through the groove ...

Страница 224: ...6 7 Special Instructions of Wiring Special Instructions of Wiring Main PCB assembly wiring 3 Wiring at lower section of main PCB ...

Страница 225: ...6 8 Special Instructions of Wiring Front cover assembly wiring 1 Wiring of LED lamp assembly 2 Wiring of operation PCB assembly ...

Страница 226: ......

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