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Brother HS-3000, Service Manual, Page: 137 / 164

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Brother HS-3000 Service Manual Download Page 137

5 - 14

Failure Investigation
for Electronic Parts

LED lamp does not come on

The LED lamp does not light.

Connect it properly.

N

Y

Y

Are the operation PCB assy. and LED 
lamp assy. correctly connected?

Connect it properly.

N

Y

Y

Is the LCD (back light PCB assy.) 
lead wire correctly connected to the 
operation PCB assy.?

Replace the power supply 
PCB assy.

N

Is the voltage between pins 4 & 3 at 
the power supply PCB assy. 
connector 30V DC?

Connect it properly.

N

Are the main PCB assy. and the operation 
PCB assy. correctly connected?

Replace the LED lamp assy.

or

Replace the operation PCB assy.

or

Replace the main PCB assy.

Summary of Contents for HS-3000

Page 1: ......

Page 2: ......

Page 3: ......

Page 4: ...s removal 2 10 Single light guide assy removal 2 10 Mode select PCB assy removal 2 10 SV keytop removal 2 11 Panel cover assy removal 2 12 Panel cover assy disassembly 2 12 Base plate rubber removal 2 13 Upper cover thread guide removal 2 13 Main PCB assy removal 2 13 Power PCB assy removal 2 14 Power PCB assy disassembly 2 14 Inlet assy removal 2 14 FC jack removal 2 15 Main motor assy removal 2 ...

Page 5: ...Bands removal 2 31 Threader hook assy removal 2 31 Lead wire assy removal 2 31 BH switch assy removal 2 32 Thread take up lever and needle bar crank removal 2 32 Thread take up lever link removal 2 32 Needle bar assy removal 2 33 Needle bar assy disassembly 2 33 Needle holder assy removal 2 34 Needle holder assy disassembly 2 35 Presser bar removal 2 36 Z zigzag lever assy removal 2 36 Z zigzag le...

Page 6: ... 17 SSVR PCB assy attachment 3 18 Thread guide assy B attachment 3 18 Thread guide assy B assembly 3 19 Thread guide assy A attachment 3 20 Thread guide assy A assembly 3 20 Front cover assy attachment 3 21 Face plate A assy attachment 3 22 Face plate A assy assembly 3 22 Needle plate B assy attachment 3 23 Needle plate B assy assembly 3 23 Base cover attachment 3 23 Accessory table attachment 3 2...

Page 7: ... 3 46 Thread take up lever and needle bar crank attachment 3 47 BH switch assy attachment 3 47 Lead wire assy assembly 3 48 Threader hook assy attachment 3 48 Bands attachment 3 48 Thread slider guide attachment 3 48 4 Adjustment 4 1 Starting test mode Starting and stopping operation 4 2 Timing belt tension 4 3 Motor belt tension 4 4 Upper thread tension 4 5 Left base line needle drop 4 6 Rotary h...

Page 8: ...es not turn 5 6 Cannot sew pattern correctly 5 9 Cannot sew button hole correctly 5 10 Problems with vertical needle movement and reverse stitching 5 11 Does not operate when the foot controller is used 5 12 Bobbin winding cannot be done 5 13 LED lamp does not come on 5 14 LCD display is not normal 5 15 Buzzer does not sound 5 16 Error is displayed 5 17 6 Repair Manual 6 1 7 Special Instructions o...

Page 9: ...vi ...

Page 10: ...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 ...

Page 11: ...1 2 Outline of Mechanism Main Mechanisms Upper shaft mechanism Lower shaft mechanism Feed Rotary hook mechanism Bobbin winder mechanism Thread tension mechanism Needle bar Presser foot mechanism ...

Page 12: ...r crank rod Needle bar block Needle bar Needle bar supporter assy Needle Pulley Upper shaft Needle bar crank Needle bar crank rod Thread take up counter weight Needle bar block Feed dog Outer rotary hook Timing pulley D Timing belt Pulley Upper shaft pulley Upper shaft Vertical adjusting screw F pulse motor Feed bar Feed arm A Lower shaft Feed arm b assy Lower shaft gear Feed module Timing pulley ...

Page 13: ...nents Front cover side Machine rear cover side LED lamp SS VR PCB LCD module Mode selection PCB Operation PCB Power supply PCB Main motor Power switch Inlet NP sensor Main PCB BH change switch PF switch BH lever switch F pulse motor BW switch Z pulse motor ...

Page 14: ...CONTROLLER JACK MAIN MOTOR SSVR PCB SWITCHING POWER 30V 5V CIRCUIT MAIN MOTOR DRIVE CIRCUIT POWER SUPPLY PCB INLET POWER SWITCH SS SW BK SW NP SW SPEED VR MODE SELECTION PCB UTILITY STITCH KEY CHARACTER STITCH KEY LED x2 LED x2 FRONT COVER LCD MODULE OPERATION PCB Z KEY x2 F KEY x2 PATTERN SELECTION KEY x4 LCD LED PCB WHITE COLOR LED BACK LIGHT TWIN NEEDLE KEY REVERSE STITCH KEY CONSTANT CURRENT C...

Page 15: ... the forward and rear ends of the button hole according to the BH presser foot and lever BH button hole lever switch This switch detects whether the BH lever is up or down Needle position NP sensor This sensor detects the drive timing of each pulse motor and the vertical stop of the needle position It detects the upper shaft angle of rotation by using a shutter attached to the upper shaft and an o...

Page 16: ...2 1 2 Disassembly Main parts 2 2 Feed unit 2 22 Needle presser unit 2 30 ...

Page 17: ...2 2 Main parts Main parts location diagram Main unit ...

Page 18: ... Main unit Disassembly 1 Accessory table removal 1 Remove the accessory table 1 1 2 Base cover removal 1 Remove the screw 1 and then remove the base cover 1 2 Remove the screw 2 and then remove base cover A 2 1 1 1 2 ...

Page 19: ... needle plate B assy 2 1 2 3 1 Needle plate B assy disassembly 1 Remove the cutter cover 2 from the needle plate B assy 1 2 Remove the spring plate 3 from the cutter cover 2 and then remove the NT lower thread cutter 4 3 Remove the 2 slide button hooks 5 and then remove the slide button 6 2 1 5 6 5 4 3 ...

Page 20: ...sy removal 1 Remove the screw 1 and then remove the face plate assy 1 1 1 4 1 Face plate A assy disassembly 1 Remove the screw 1 and then remove the cutter cover assy 1 2 Remove the CS retaining ring 2 and then remove the NT lower thread cutter 3 2 3 1 1 ...

Page 21: ...e screws 1 front 1 pc 2 rear 1 pc and 3 rear 5 pcs and then remove the front cover assy Key point Disconnect the SSVR PCB lead wire connector 1 and the operation PCB lead wire connector 2 from the main PCB assy 3 located near the front cover assy 3 3 2 1 3 2 1 ...

Page 22: ... 2 Remove the thread dial shaft 3 Key point Turn the dial clockwise until it stops 3 Remove the thread tension dial 4 and the thread tension plate assy 5 4 Remove the spring 6 washer 7 tension disc washer 8 thread release plate 9 washer 7 tension disc B and then tension disc A A in this order from the caulking shaft of the thread tension holder assy 1 5 Remove the thread tension adjusting screw B ...

Page 23: ...de assy B 1 1 1 7 2 Thread guide assy B disassembly 1 Remove the screw 1 2 Remove the thread catching spring case 2 from thread take up holder B 1 3 Remove the thread take up spring 3 from the thread catching spring case 2 4 Remove the thread guide wire 4 from thread take up holder B 1 1 2 1 3 2 4 1 ...

Page 24: ...3 screws 1 and then remove the SSVR PCB assy 2 1 1 2 9 Buttons removal 1 Remove the SS button 1 the backstitching button 2 and the NP button 3 1 3 2 10 LED lamp removal 1 Disconnect the LED lamp connector 2 from the operation PCB assy 1 2 Remove the screw 1 and then remove the LED lamp 3 1 3 2 1 ...

Page 25: ...the operation PCB assy 1 4 Disconnect the LCD cable 6 from the operation PCB assy 1 1 5 4 1 2 3 6 12 Selecting and manual buttons removal 1 Remove the 2 selecting buttons 1 2 Remove manual button A 2 and manual button B 3 3 2 1 13 Single light guide assy removal 1 Remove the 2 screws 1 and then remove the single light guide assy 1 1 1 14 Mode select PCB assy removal 1 Remove the 2 screws 1 and the...

Page 26: ...11 Main parts Main unit Disassembly 15 SV keytop removal 1 Remove the SV keytop 1 Key point Press the SV keytop hooks 2 2 locations from the inside of the front cover assy 3 to remove the SV keytop 1 2 3 ...

Page 27: ...move the 4 screws 1 and then remove the panel cover assy 1 from the front cover assy 1 1 1 1 2 3 3 2 16 1 Panel cover assy disassembly 1 Remove the panel plate assy 1 from the panel cover assy 2 2 Remove the 2 panel plate holders 3 from the panel cover assy 2 ...

Page 28: ...moval 1 Reconnect the all connectors from the main PCB assy 1 2 Remove the screw 1 and then remove the lead wire assy 2 from the main PCB assy 1 Key point Remove the each lead wires from the guide parts of the shutter cover 3 3 Remove the 2 screws 2 and then remove the shutter cover 3 from the rear cover assy 4 Remove the 3 hooks and then remove the main PCB assy 1 from the shutter cover 3 1 2 1 3...

Page 29: ...the hook on the inlet assy connector 5 and pull it out 5 2 1 4 3 2 1 20 1 Power PCB assy disassembly 1 Disconnect the power lead wire assy connector 1 from the power PCB assy 2 2 Remove the screw 1 and then remove the power plate spring 3 from the power PCB assy 2 3 Remove the screw 2 and then remove the insulator sheet 4 and the power PCB assy 2 from the insulation cover 1 3 1 2 4 2 21 Inlet assy...

Page 30: ... 23 Main motor assy removal 1 Remove the 2 screws 1 and then remove the main motor assy 1 fron the rear cover assy 2 Remove the motor belt 2 from the main motor assy 1 1 2 1 23 1 Main motor assy disassembly 1 Remove the motor fan 1 2 Remove the 2 screws 1 and then remove the main motor 3 from the motor holder 2 1 1 2 3 ...

Page 31: ...1 and then remove the tension pulley assy 1 from the rear cover assy 1 1 24 1 Tension pulley assy disassembly 1 Remove the screw 1 and then remove the tension pulley holder 2 from the tension pulley assy 1 1 1 2 25 Spring removal 1 Remove the spring 1 from the feed unit assy 2 1 2 ...

Page 32: ...ews 2 and then remove the feed unit assy 2 from the rear cover assy 1 1 2 2 27 Upper shaft assy removal 1 Remove the screw 1 2 Remove the 4 screws 2 and then remove the 2 upper shaft bearing pressers 1 3 Remove the upper shaft assy 3 from the thread take up counter weight 2 and then remove timing belt 420 5GT 6 4 and timing belt 372 2GT 6 5 2 3 4 5 1 1 2 1 ...

Page 33: ... the label and then remove the screw 1 2 Remove the 2 screws 2 and then remove the needle presser unit 1 1 2 1 29 Plate spring removal 1 Remove the adjusting screw 1 2 Remove the 2 screws 1 and then remove the adjusting plate 2 and the plate spring 3 1 2 1 3 1 2 3 ...

Page 34: ...hen remove the NT lower thread cutter 3 1 3 2 31 Bobbin winder assy removal 1 Remove the screw 1 and then remove the bobbin winder shaft stopper 1 and the bobbin winder spring 2 2 Remove the screw 2 and then remove the senser holder 3 and the SW assy BW F 4 from the bobbin winder shaft stopper 1 3 Remove the 2 screws 3 and then remove the bobbin winder assy 5 4 Remove the rubber ring 6 from the bo...

Page 35: ...pool pin spring 1 and pull out the spool pin 2 2 Peel the spool pin stand 3 2 1 3 33 Bobbin presser removal 1 Remove the screw 1 and then remove the bobbin presser 1 1 1 34 Thread guide assy removal 1 Remove the screw 1 and then remove the thread guide assy 1 1 1 ...

Page 36: ...2 21 Main parts Main unit Disassembly 35 Base plate rubber removal 1 Remove the screw 1 and then remove the plain washer M 3 5 1 and rubber cushion A 2 1 1 2 3 ...

Page 37: ...2 22 Feed unit location diagram Main unit ...

Page 38: ... 1 1 1 1 Needle plate A assy disassembly 1 Remove the screw 1 and then remove the F gear stopper plate 1 2 Remove the screw 2 and then remove the stopper plate 2 2 1 2 1 2 Spring removal 1 Remove the spring S10 S10 3 Inner rotary hook bracket assy removal 1 Remove the screw 1 and then remove the inner rotary hook bracket assy 1 1 1 ...

Page 39: ...g 2 Remove the M5 nut 1 3 Remove the vertical adjuster screw assy 2 1 2 S04 S10 6 Outer rotary hook removal 1 Remove the screw 1 and then remove the outer rotary hook shaft 1 washer 6 2 outer rotary hook assy 3 spacer 4 and washer 6 2 1 4 1 3 2 7 Shaft supporter removal 1 Remove the 2 screws 1 and then remove the shaft supporter 1 and the collar 2 1 1 2 1 ...

Page 40: ...this order Retaining ring CS4 1 2 9 Needle plate supporter shaft B removal 1 Remove nut 1 M3 1 2 Remove needle plate supporter shaft B 2 and feed arm supporter 3 Key point Press the hook on the feed arm supporter 3 from the rear of the feed bar to remove the supporter 3 Remove the feed arm supporter 3 from the needle plate supporter shaft B 2 1 3 2 2 3 2 3 ...

Page 41: ...the horizontal feed shaft 3 3 Remove the feed arm A assy 4 and the thrust wafer 2 2 4 1 2 2 1 3 10 1 Feed arm B assy disassembly 1 emove the retaining ring CSTW 3 5 and then remove the feed arm B assy 1 and the polyester slider 2 2 Remove the screw 1 and then remove the feed supporting plate 4 and feed supporting plate B 5 from the feed arm B 3 1 Retaining ring CSTW 3 5 2 1 5 3 4 ...

Page 42: ...1 1 Feed adjuster disassembly 1 Remove spring and then remove the F gear 2 from the feed adjuster 1 S05 1 2 S05 S05 12 Vertical lever removal 1 Remove the 4 retaining rings E3 2 Pull out the vertical feed shaft 1 and then remove the plain washer L4 2 spring vertical lever 3 and drop knob 4 4 2 1 3 Retaining ring E3 Retaining ring E3 Retaining ring E3 S07 S07 ...

Page 43: ...der assy 1 2 1 1 S08 S08 13 1 FPM disassembly 1 Remove the lead wire assy FPM LE 1 2 Remove the 2 screws 1 and the remove the FPM 2 3 Remove the rubber 3 1 2 1 3 14 Timing pulley D removal 1 Remove the 2 screws 1 and then remove timing pulley D 1 2 Remove the retaining ring E6 and then pull out the lower shaft bushing 2 1 2 1 Retaining ring E6 ...

Page 44: ... shaft assy 2 Key point Push down the lower shaft assy 2 to remove it Check that the gear does not contact the base plate 3 Remove the 2 screws 1 and then remove the thrust wafer 1 and the set collar 3 1 2 Retaining ring E6 1 1 3 2 16 Lower shaft bushing removal 1 Remove the 3 screws 1 2 Remove bushing presser B 1 and the lower shaft bushing 2 1 2 1 ...

Page 45: ...2 30 Needle presser unit location diagram Main unit ...

Page 46: ...rew 1 and then reomve thread slider guide 1 1 1 2 Bands removal 1 Cut the 5 bands 1 1 1 3 Threader hook assy removal 1 Pull the needle thread slider 1 toward you and then remove the threader hook assy 2 2 1 4 Lead wire assy removal 1 Remove the screw 1 and then remove the lead wire assy 1 1 1 ...

Page 47: ...move the needle bar crank rod 1 2 Remove the screw 1 and then remove the needle bar crank 3 from the thread take up lever 2 1 2 1 3 7 Thread take up lever link removal 1 Remove the retaining ring E5 and spring washer 1 and then remove the thread take up lever link 3 from the shaft 2 2 Remove the screw 1 and then pull the shaft 2 out of the base holder 1 2 3 1 Retaining ring E5 ...

Page 48: ...le bar assy removal 1 Loosen the screws 1 and 2 and then pull the needle bar 1 down and remove the needle thread block 2 and the needle bar block 3 1 2 3 2 1 8 1 Needle bar assy disassembly 1 Remove the screw 1 and then remove the needle block assy 1 1 1 ...

Page 49: ... unit 9 Needle holder assy removal 1 Remove springs and 2 Remove the screw 1 and then remove the shaft 1 needle holder block 2 and needle holder assy 3 Key point Pull out the needle holder assy from the top 1 1 2 S02 S03 3 S02 S03 ...

Page 50: ...e holder assy disassembly 1 Remove spring 2 Remove the screw 1 and then remove the plate 1 3 Remove the screw 2 Pull out the shaft 2 and then remove needle holder shaft A 3 4 Remove the screw 3 and then remove the zigzag adjusting nut 4 3 4 1 2 3 1 S01 2 S01 ...

Page 51: ... Key point Remove the presser bar 1 and the presser feed holder assy 4 2 Remove the J foot 5 from the presser feed holder assy 4 3 Remove the screw 2 and then remove the presser feed holder assy 4 1 2 1 5 4 2 3 11 Z zigzag lever assy removal 1 Remove the retaining ring E4 and then remove the Z zigzag lever 1 2 Remove the polyester slider 2 1 Retaining ring E4 2 ...

Page 52: ...Z zigzag cam removal 1 Remove the retaining ring E3 and then remove the Z zigzag cam 1 2 Remove the rubber 2 1 2 Retaining ring E3 13 Shaft bushing removal 1 Remove the 2 screws 1 and then remove the shaft bushing 1 1 1 14 Presser foot lifter removal 1 Remove the retaining ring E4 and then remove the presser foot lifter 1 1 Retaining ring E4 ...

Page 53: ...thread release lever 1 and the spring 2 2 1 Retaining ring CS4 16 Lock nut removal 1 Remove the lock nut 1 and then remove the screw 1 1 1 17 Z pulse motor removal 1 Remove the 2 screws 1 and then remove the Z pulse motor 1 1 1 18 Presser switch assy removal 1 Remove the screw 1 and then remove the presser switch 1 1 1 ...

Page 54: ...3 1 3 Assembly In this chapter explains the disassembly and assembly of the each module When fix and replace the each module use this chapter Main parts 3 2 Feed unit 3 25 Needle presser unit 3 37 ...

Page 55: ...3 2 Main parts Main parts location diagram Main unit ...

Page 56: ...read guide assy attachment 1 Attach the thread guide assy 1 to the rear cover assy 2 Temporarily tighten the screw 1 Key point Tighten the screw after performing 4 15 Bobbin winder 1 Torque 0 88 1 18 N m 1 1 Giza Tite 4X12 3 Bobbin presser attachment 1 Attach the bobbin presser 1 with the screw 1 Key point Place the bobbin presser with the smaller end facing the rear Tighten the screw after perfor...

Page 57: ... pin stand 1 so that it does not protrude from the attachment section 2 Insert the spool pin 2 into the rear cover assy Insert the pin from the grooved end 3 Attach the spool pin spring 3 to the rear cover assy Key point Check that the spool pin 2 moves lightly 1 2 3 ...

Page 58: ...BW switch lever 6 into the bobbin winder shaft stopper 5 5 Set the bobbin winder spring 7 and then the bobbin winder shaft stopper 5 to the stopper attachment section of the rear cover assy and secure them with the screw 3 Key point Check that the bobbin winder spindle base passes over the bobbin winder spring when the bobbin winder is switched Check that the bobbin winder spring returns to the or...

Page 59: ... thread cutters 2 and the bobbin thread cutter holder 3 to the bobbin base assy 1 1 2 3 7 Plate spring attachment 1 Attach the adjusting plate 1 and then the plate spring 2 from the inside of the rear cover assy with the 2 screws 1 2 Tighten the adjusting screw 3 to the plate spring 2 1 Torque 0 78 1 18 N m 1 2 3 1 3 1 2 Taptite Bind B M4X10 ...

Page 60: ...the rear cover assy with screws 1 and 2 1 pc and 2 pcs respectively Key point Lift the presser foot lifter 2 and insert it into the hole on the rear cover assy 3 to set the needle presser unit 1 to the attachment position 1 Torque 0 78 1 18 N m 2 Torque 1 18 1 57 N m 2 1 2 1 Screw Pan M3X25 Giza Tite 5X20 ...

Page 61: ...aft bearing presser 7 so that the projecting part of 7 is positioned at the upper right And attach the right upper shaft bearing presser 8 so that the projecting part of 8 is positioned at the lower shaft 5 Apply 1 or 2 drops of OILER to the matching section of the upper shaft and the upper shaft bushing 6 Align the D cut face of the needle bar crank with the screw hole on the thread take up lever...

Page 62: ...shaft bearing presser 3 so that the projecting part of 3 is positioned at upper right 3 Apply 1 or 2 drops of OILER to the matching section of the lower shaft 4 and the lower shaft bushing 2 Apply OILER to the matching section of the lower shaft and the lower shaft bushing 1 2 drops XZ0206 1 Torque 1 18 1 57 N m 2 Torque 1 18 1 57 N m 1 1 2 3 2 4 Giza Tite 5X16 Giza Tite 5X16 11 Spring attachment ...

Page 63: ...is at the top 3 Pull the timing belt 7 and hang it over the timing pulley D 8 1 7 8 4 6 3 5 3 7 2 13 Tension pulley assy attachment 1 Attach the tension pulley assy 1 to the rear cover assy with the 2 screws 1 Key point Perform 4 3 Timing belt tension 1 Torque 1 18 1 57 N m 1 1 Giza Tite 5X16 13 1 Tension pulley assy assembly 1 Align the boss 3 on the tension pulley holder 2 with the hole on the t...

Page 64: ...ain motor 2 to the motor holder 1 with the 2 screws 1 2 Attach the motor fan 3 1 Torque 0 59 0 78 N m 1 3 1 2 Screw Pan S P washer M3X8 15 FC jack attachment 1 Insert the FC jack assy 1 from the inside of the rear cover assy 2 Attach the jack nut 2 from the outside of the rear cover assy Key point Pass the lead wire of the FC jack assy 1 through the rear of the main motor 2 1 16 Inlet assy attachm...

Page 65: ...PM lead wire assy 6 to the guide parts of the insulation cover Key point Refer to 7 1 Special Instructions of Wiring for wiring details 1 Torque 0 78 1 18 N m 2 Torque 1 18 1 57 N m 5 2 7 1 1 3 4 2 2 6 Taptite Cup B M4X14 Screw Bind M4X8 17 1 Power PCB assy assembly 1 Attach the power PCB assy 2 and the insulator sheet 3 to the insulation cover 1 with the screw 1 2 Attach the power plate spring 4 ...

Page 66: ... screw hole of the shutter cover 2 3 Attach the shutter cover 2 with the 2 screw 1 4 Attach the lead wire assy 6 to the main PCB assy 1 with the screw 2 5 Connect the all connectors to the main PCB assy 1 Key point Refer to 7 1 Special Instructions of Wiring for wiring details 1 Torque 0 78 1 18 N m 2 Torque 0 39 0 78 N m 4 3 5 2 1 1 2 2 6 1 Taptite Bind B M4X14 Taptite Bind B M3X10 19 Upper cover...

Page 67: ...screws 1 Key point Align the protrusion of the panel cover assy 1 to the positioning hole of the front cover assy 1 Torque 0 39 0 78 N m 1 1 1 Taptite Bind B M3X10 21 1 Panel cover assy assembly 1 Attach the 2 panel plate holders 1 to the panel cover assy 2 2 Attach the panel plate assy 3 to the panel cover assy 2 1 1 2 3 2 ...

Page 68: ...e SV keytop 1 align the front cover assy 1 2 1 23 Mode select PCB assy attachment 1 Attach the mode select PCB assy 1 with the 2 screws 1 1 Torque 0 39 0 78 N m 1 1 Taptite Bind B M3X10 24 Single light guide assy attachment 1 Attach the single light guide assy 1 with the 2 screws 1 1 Torque 0 39 0 78 N m 1 1 Taptite Bind B M3X10 ...

Page 69: ...ith the 3 screws 1 3 Connect the connector 4 to the operation PCB assy 2 4 Connect the connector 5 to the mode select PCB assy 6 1 Torque 0 39 0 78 N m 1 2 1 3 6 2 4 5 Taptite Bind B M3X10 27 LED lamp attachment 1 Attach the LED lamp 1 with the screw 1 2 Attach the LED lamp connector 2 to the operation PCB assy 3 Key point Secure the LED lamp lead wire 1 to the rib on the front cover assy Refer to...

Page 70: ...3 17 Main parts Main unit Assembly 28 Buttons attachment 1 Attach the SS button 1 the backstitching button 2 and the NP button 3 1 3 2 1 3 2 ...

Page 71: ...he SSVR PCB assy 1 into the slot 3 on the SV key top 2 Attach the 2 bands 4 Key point Refer to 7 1 Special Instructions of Wiring for wiring details 1 Torque 0 39 0 78 N m 1 1 3 2 1 4 Taptite Bind B M3X10 30 Thread guide assy B attachment 1 Attach the thread guide assy B 1 with the screw 1 1 Torque 0 39 0 78 N m 1 1 Taptite Bind B M4X14 ...

Page 72: ...e on thread guide assy B 1 to the ridge of the thread hanging section on the thread take up spring and attach the thread take up spring to thread guide assy B 1 with the screw 1 Key point Attach the thread hanging section on the thread take up spring to the section between the ribs of the thread catching spring case Insert the 2 ribs of the thread catching spring case into the slot on thread guide...

Page 73: ...ing 8 in this order to the caulking shaft of the thread tension holder assy 1 2 Attach the thread tension adjusting screw to the thread tension plate 9 3 Engage the ridge of the thread tension plate 9 with the groove on the thread tension dial A insert them into the caulking shaft of the thread tension holder assy 1 and secure them with the tension dial shaft B 4 Attach the notch spring C to the t...

Page 74: ...ok section of the shutter cover 4 while preventing them from lifting or disconnecting Refer to 7 1 Special Instructions of Wiring for wiring details 2 Attach the front cover assy to the rear cover assy with screws 1 front 1 pc 2 rear 1 pc and 3 rear 5 pcs 1 Torque 0 88 1 18 N m 2 Torque 0 88 1 18 N m 3 Torque 1 18 1 57 N m 3 3 2 3 2 1 1 Giza Tite 4X12 Giza Tite S PW 4X25 Giza Tite S PW 5X18 ...

Page 75: ...h the NT lower thread cutter 2 to the cutter cover 1 and then attach the CS retaining ring 3 Key point Insert the narrow edge of the NT lower thread cutter 2 into the cutter cover 1 first Align the tab of the CS retaining ring with the groove on the shaft of the cutter cover 1 2 Attach the cutter cover assy to face plate A 4 with the screw 1 1 Torque 0 39 0 78 N m 3 2 1 1 Taptite Bind B M3X12 ...

Page 76: ...Needle plate B assy assembly 1 Attach the slide button 1 to needle plate B 2 2 Attach the NT lower thread cutter 3 and the spring plate 4 to the cutter cover 5 3 Attach the cutter cover to needle plate B 2 5 2 1 3 4 35 Base cover attachment 1 Attach the base cover 1 with the screw 1 2 Attach base cover A 2 with the screw 2 1 2 Torque 0 39 0 78 N m 2 1 1 2 Taptite Flat B M3X8 ...

Page 77: ...3 24 Main unit Main parts 36 Accessory table attachment 1 Attach the accessory table 1 1 ...

Page 78: ...3 25 Assembly Feed unit Feed unit location diagram Main unit ...

Page 79: ...t assy 2 and attach them to the lower shaft bushing 4 3 Insert the thrust washer 5 into the lower shaft assy 2 and attach the retaining ring E6 4 Push the lower shaft assy 2 from the retaining ring side move the set collar 1 to the lower shaft bushing 4 and then secure them with the 2 screws 1 1 Torque 0 78 1 18 N m 1 3 1 2 5 2 4 Retaining ring E6 Set Screw Socket CP M4X4 3 Timing pulley D attachm...

Page 80: ...tip of the screw protrudes 7 mm 3 Attach the screw 2 1 2 Torque 0 59 0 78 N m S08 2 1 1 S08 2 2 3 S08 Bolt Socket M4X25 Screw M3X8 21 5 SPRING XC2537 4 1 FPM assembly 1 Attach the rubber 2 to the caulking shaft of the FPM holder assy 1 2 Attach the FPM 3 with the 2 screws 1 3 Apply 1 or 2 drops of FBK OIL RO 100 to the shaft bushing of FPM 3 4 Attach the lead wire assy FPM LE 4 Apply FBK OIL RO 10...

Page 81: ... vertical feed shaft 1 is closer to the retaining ring and hold this end and insert the shaft from the left side of the base plate assy 2 Attach the 2 retaining rings E3 3 Place the groove on the vertical feed shaft 1 inside the base plate assy 6 and attach the retaining ring E3 4 Move the vertical feed shaft to the left and attach the retaining ring E3 S07 2 3 1 4 5 Retaining ring E3 Retaining ri...

Page 82: ... to the shaft of the feed adjuster assy 1 3 Attach the feed adjuster assy 3 to the base plate assy Apply OILER to the shaft of the feed adjuster assy 1 2 drops XZ0206 S06 3 2 S06 2 1 S06 S06 SPRING XC2531 8 8 9 9 5 5 6 1 Feed adjuster assy assembly 1 Attach the flat side of the F gear 1 to the shaft of the feed adjuster 2 and then attach the ends of spring to the F gear 1 and the feed adjuster gea...

Page 83: ...m with the screw 1 Key point Insert the horizontal feed shaft 8 through the feed arm A assy 1 so that the hole on the shaft faces FPM and align this hole with the hole on the base plate assy 6 5 Attach the feed supporting plate 9 and feed supporting plate B 8 to the feed arm B assy 3 with the screw 2 6 Insert the thrust washer 7 and the set collar 9 into the horizontal feed shaft 8 and then secure...

Page 84: ... of the feed arm A assy 1 2 Apply a bead of MOLYKOTE EM 30L to the shaft of the feed arm A assy 1 3 Attach the feed arm B assy 3 to the shaft of the feed arm A assy 1 and then attach the retaining ring CSTW 3 5 Apply MOLYKOTE EM 30L to the shaft of the feed arm A assy Bead XC8385 2 1 Retaining ring CSTW 3 5 3 ...

Page 85: ...ft B attachment 1 Insert the feed arm supporter 1 into the needle plate supporter shaft B 2 and attach them to the base plate assy 3 2 Tighten nut 1 M3 4 3 Move the feed arm supporter 1 down and fit the hook 5 to the base plate assy 3 2 5 1 1 2 3 2 1 3 4 ...

Page 86: ... motor gear with your finger to prevent it from rotating when the feed adjuster assy 4 contacts the F pulse motor gear 3 Align the feed adjuster assy 4 with the F gear teeth 6 and engage them with the FPM gear 1 Key point Check that the mark 7 on the feed adjuster assy 4 is aligned with the mark 8 on the FPM gear 4 Apply a bead of EPNOC AP N 0 to the circumference of the F gear 6 Apply EPNOC AP N ...

Page 87: ...haft supporter with the 2 screws 1 1 Torque 0 78 1 18 N m 1 1 2 1 Screw Pan S P washer M4X22 12 Outer rotary hook attachment 1 Apply a light covering of EPNOC AP N 0 to the groove on the outer rotary hook shaft 1 2 Insert the outer rotary hook shaft 1 into the the spacer 4 and outer rotary hook assy 2 3 Place spacer 4 and then the washer 6 3 onto the outer rotary hook shaft 1 4 Attach the outer ro...

Page 88: ... feed bar 1 Key point Tighten the screws after performing 4 18 Front back and left right position of feed dog 1 Torque 0 78 1 18 N m 1 2 1 Screw Bind M3X6 15 Inner rotary hook bracket assy attachment 1 Align the inner rotary hook bracket 1 with the boss on the base plate assy 2 and temporarily tighten the screw 1 Key point Tighten the screw after performing 4 20 Inner rotary hook bracket position ...

Page 89: ...h the needle plate A assy 1 with the 2 screws 1 1 Torque 0 78 1 18 N m 1 1 Screw M4 17 1 Needle plate A ASSY assembly 1 Attach the F gear stopper plate 1 with the screw 1 2 Attach the stopper plate 2 with the screw 2 1 2 Torque 0 59 0 78 N m 2 1 2 1 Screw Bind M2 6X3 ...

Page 90: ...3 37 Assembly Needle presser unit Needle presser unit location diagram Main unit ...

Page 91: ...th the trench of the base holder assy 2 1 Torque 0 78 1 18 N m 1 1 2 Screw Bind M3X6 2 Z pulse motor attachment 1 Attach the Z pulse motor 1 to the base holder assy with the 2 screws 1 2 Apply 1 or 2 drops of FBK OIL RO 100 to the shaft bushing 2 of the Z pulse motor 1 Apply FBK OIL RO 100 to the shaft bushing of the Z pulse motor 1 2 drops XC8388 1 Torque 0 78 1 18 N m 1 1 2 Screw Bind M3X6 ...

Page 92: ...tachment 1 Apply a bead of EPNOC AP N 0 to the caulking shaft 2 of the base holder assy 1 2 Attach the thread release lever 3 and the spring 4 to the caulking shaft 2 of the base holder assy 1 and then attach the retaining ring CS4 Key point Position the tip of the spring at the top and align the spring with the hole on the thread release lever 3 Secure 0 2 mm between the thread release lever 3 an...

Page 93: ... foot lifter 2 Apply EPNOC AP N 0 to the presser foot lifter attachment shaft of the base holder assy Bead XC8387 Apply EPNOC AP N 0 to the cam face of the pressure foot lifter Bead XC8387 1 2 Retaining ring E4 3 6 Shaft bushing attachment 1 Attach the shaft bushing 2 to the base holder assy 1 with the 2 screws 1 Key point Tighten the 2 screws 1 in the following order temporarily tighten the left ...

Page 94: ...m 4 to the shaft 3 Key point Align the mark on the Z zigzag cam 4 with the mark on the Z pulse motor 5 4 Attach the retaining ring E3 5 Apply a light covering of EPNOC AP N 0 to the gear of the Z zigzag cam 4 and the circumference of the cam Apply EPNOC AP N 0 to the Z zigzag cam shaft of the base holder assy Bead XC8387 Apply EPNOC AP N 0 to the gear of the Z zigzag cam and the circumference of t...

Page 95: ... zigzag lever shaft 1 of the base holder assy 3 Attach the Z zigzag lever assy 3 and then attach the retaining ring E4 Key point Place the caulking shaft 4 on the left side of the Z zigzag cam 5 Apply EPNOC AP N 0 to the Z zigzag lever shaft of the base holder assy Bead XC8387 2 1 3 4 5 Retaining ring E4 8 1 Z zigzag lever assy assembly 1 Attach the Z zigzag cap 2 to the Z zigzag lever 1 1 2 ...

Page 96: ... 4 and then attach the presser bar 1 presser bar clamp 5 and spring 6 in this order to the base holder 4 5 Temporarily tighten the screw 2 to the presser bar clamp 5 Key point Tighten after performing 4 13 Presser bar height and parallelism Adjust the distance from the base holder bottom face to the tip of the presser bar 1 to approximately 50 mm Apply OILER to the circumference of the presser bar...

Page 97: ...Insert the shaft of the needle holder assy into the small hole on the needle holder block 7 and then insert the shaft of the shaft assy 8 into the hole on the needle holder block 7 and the hole on the base holder 3 Secure them with the screw 1 5 Attach springs and Key point Set spring with the longer hook down Apply FBK OIL RO 100 to the circumference of needle holder shaft A of the needle holder ...

Page 98: ...der assy 4 and the hole on needle holder shaft A 3 so that the narrow end of the shaft is on the left side 4 Insert the plate 6 into the groove on the shaft 5 and then attach them to the needle holder assy 4 with the screw 2 5 Attach the screw 3 6 Attach spring to the plate 6 and the needle thread slider 7 Apply OILER to the circumference at the top of the needle holder 1 2 drops XZ0206 1 Torque 0...

Page 99: ...y 2 with the screw 1 Key point The screw 1 should be on the right side when the groove on the needle bar assy 2 faces the front 1 1 2 1 Needle Clamp Screw 12 Thread take up lever link attachment 1 Insert the shaft 1 into the base holder 2 and then align the screw 1 with the trench on the base holder 2 and tighten it temporarily 2 Attach the thread take up lever link 3 3 Apply a light covering of M...

Page 100: ...oint Move the shaft 8 to the right and then attach the thread take up lever assy 4 5 Tighten the screw 2 6 Temporarily tighten the needle bar block 7 and the needle thread block 8 with the screw 3 Apply MOLYKOTE EM 30L to the thread take up lever attachment section of the needle bar crank Light covering XC8385 Apply MOLYKOTE EM 30L to the shaft of the thread take up lever Light covering XC8385 1 T...

Page 101: ...e needle thread slider 1 toward you and then align the D cut of the threader hook assy 2 with the D cut of the needle thread shaft 3 2 3 1 17 Bands attachment 1 Attach the 5 bands 1 to the lead wires Key point Refer to 7 1 Special Instructions of Wiring for wiring details 1 1 18 Thread slider guide attachment 1 Attach the thread slider guide 1 wish the screw 1 1 Torque 0 78 1 18 N m 1 1 Screw Bind...

Page 102: ... Needle bar rising 4 9 Needle bar height 4 10 Clearance between needle and rotary hook point 4 11 Needle threader 4 12 Presser bar height and parallelism 4 13 Forward backward feed 4 14 Bobbin winder 4 15 BH lever switch position 4 16 Needle and presser foot front back position 4 17 Front back and left right position of feed dog 4 18 Feed dog height 4 19 Inner rotary hook bracket position 4 20 Inn...

Page 103: ...se line with each stitch Switches left base line center base line right base line with each push of 0mm none Any speed may be selected using the speed control key Left base line needle drop 4 6 Rotary hook unit position 4 7 Needle clearance left right 4 8 Needle bar rising 4 9 Needle bar height 4 10 Clearance between needle and rotary hook point 4 11 Feed adjustment 5 100 stitches forward on the l...

Page 104: ...tension pulley assy forward and back so that there should be 4 to 5mm slack in the timing belt when the center of the belt is pressed with a force of 1 96N 200g 3 Tighten the pan head screw S P washer M4 x 8 on the tension pulley assy XC2277001 Push pull gauge 3N Pan head screw S P washer M4 x 8 Tension pulley assy 4 5mm 1 96N 200g ...

Page 105: ...just the motor holder up and down so that there should be 3 to 4mm slack in the timing belt when the center of the belt is pressed with a force of 0 98N 100g 3 Tighten the 2 screws giza tite 5 x 16 in the motor holder XC2277001 Push pull gauge 3N Motor holder 3 4mm Screw giza tite 5 x 16 0 98N 100g ...

Page 106: ... thread tension disc 4 Lower the presser foot lever 5 Pull the thread by a tension gauge and turn the thread tension adjusting screw and adjust the tension to 0 37 to 0 42N 38 to 43g 6 Apply a small amount of thread locker to thread tension adjusting screw XA9154001 Tension gauge 50 0 5N 0 37 0 42N 38 43g Thread tension adjusting screw Thread tension disc 4 ...

Page 107: ... by hand until the needle top comes to the needle plate surface 6 Loosen the socket screw M3 x 10 7 Turn the zigzag adjusting nut and adjust the needle top drops in the right side of V groove on the needle plate A 8 Tighten the socket screw M3 x 10 Key point Refer to the next page 4 7 Rotary hook unit position when it cannot be adjusted correctly using the above procedure Needle top drops in shado...

Page 108: ...stitch button and then turn the power off 5 Turn the pulley by hand until the needle top comes to the needle plate surface 6 Loosen the 2 screws giza tite 5 x 16 7 Move the rotary hook unit right and left and adjust the needle top drops in the right side of V groove on the needle plate A 8 Tighten the 2 screws giza tite 5 x 16 Screw giza tite 5 x 16 Screw giza tite 5 x 16 Needle top drops in shado...

Page 109: ...5 Turn the pulley by hand until the needle aligns with the outer rotary hook point 6 Loosen the socket screw M3 x 10 7 Move the needle holder shaft block to the left and right and adjust clearance between the needle top and the outer rotary hook point must be same at the base line of left and right 8 Tighten the socket screw M3 x 10 Hook Point Needle Top Needle Top Left Right Outer rotary hook ass...

Page 110: ...est position 7 Remove the base cover 8 Loosen the 2 socket set screws CP M5 x 5 on the lower shaft pulley D 9 Turn the outer rotary hook by hand and adjust the right edge of the needle aligns with the outer rotary hook point when raising up the needle bar 3 1 to 3 3mm from its lowest position 10 Tighten the 2 socket set screws CP M5 x 5 on the lower shaft pulley D 11 Attach the base cover Socket s...

Page 111: ...the needle aligns with the outer rotary hook point 7 Loosen the socket set screw FT M4 x 4 in the needle bar block 8 Move the needle bar up and down and adjust clearance between the upper edge of the needle eye and the outer rotary hook point to 1 0 to 1 4mm NOTE Check the socket set screw FT M4 x 4 faces front 9 Tighten the socket set screw FT M4 x 4 of the needle bar block Key point Need to adju...

Page 112: ...e the needle to the left with the Reverse stitch button and then turn the power off 7 Loosen the screw bind M3 x 25 8 Turn the pulley by hand until the right edge of the needle aligns with the outer rotary hook point 9 Turning the adjusting screw adjust clearance between the needle and the outer rotary hook point front and back to 0 1mm or less 10 Tighten the screw bind M3 x 25 XE2396001 Box drive...

Page 113: ...er that tighten the socket set screw FT M4 x 4 Key point Tighten the socket set screw FT M4 x 4 at the position slightly to the left when viewed from the front of the machine Fig 2 NOTE In case the position of the socket set screw FT M4 x 4 is too left the hook doesn t turn Fig 1 In case the position of the socket set screw FT M4 x 4 is too right the needle thread block contacts the needle bar sup...

Page 114: ...M5 x 10 of the presser bar clamp assy 5 Adjust the needle presser bar height clearance between the needle plate A and the bottom surface of the presser foot is 6 0 to 6 5mm 6 Tighten the socket set screw CP M 5 x 10 of the presser bar clamp assy Key point Check the presser foot parallel with the feed dog hole of the needle plate A after adjust the presser bar height Top face of needle plate A 6 0 ...

Page 115: ...ocket screw M3 x 8 of the FPM holder assy 7 Adjust the forward and backward feed length turning the socket screw M4 x 25 of the FPM holder assy Key point The forward feed should be 0 to 10 mm longer then the backward feed Tightening the socket screw M4 x 25 the backward feed shorter Loosening the socket screw M4 x 25 the backward feed longer 8 Apply a small amount thread locker to the socket screw...

Page 116: ...hread guide assy up and down to 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 to 90 of the diameter Thread guide assy Bobbin presser ...

Page 117: ...d the BH presser foot B is 0 5mm Fig 2 6 Lower the BH lever and set it to the BH presser foot 7 Rotate the BH eccentric shaft and adjust the BH 0 touches the BH 1 Fig 3 Key point Pull the BH presser foot forward as much as possible and the BH 0 touches the BH 2 and the BH 2 bows a little bit Fig 4 Pull the BH presser foot backward as much as possible and the BH 0 touches the BH 1 and the BH 1 bows...

Page 118: ...the pulley by hand and drop the needle top into the presser foot hole 3 Loosen the lock nut 4 Adjust the needle top to the front back center position of the presser foot hole using the socket set screw CP M4 x 12 5 Tighten the lock nut Socket set screw CP M4 x 12 Lock nut Presser foot hole Needle top position ...

Page 119: ...ligned with that on the F pulse motor gear 6 Loosen the 2 screws bind M3 x 8 of the feed dog temporarily attach the needle plate A and adjust the front back and left right position of the feed dog Key point Adjust the clearance front back between the forward edge of the feed dog middle tooth and the needle plate A is to 3 2 to 3 8mm Adjust the clearance left right between the feed dog and the need...

Page 120: ...dle plate A turn the vertical adjuster screw assy and adjust the feed dog height from the needle plate A surface to 0 9 to 1 1mm 6 Tighten the nut M5 Do not turn the vertical adjuster screw assy 7 Fully tighten the 2 flat screws M4 of the needle plate A Key point When adjusting the feed dog height use the feed dog height gauge XC2278001 Feed dog height gauge Nut M5 Needle plate A Vertical adjuster...

Page 121: ...sher M3 x 6 of the inner rotary hook bracket assy 3 Move the inner rotary hook bracket assy forward and back and adjust the clearance overlap between the inner rotary hook point and the bracket spring to 2 3 to 2 5mm 4 Tighten the pan head screw S P washer M3 x 6 of the inner rotary hook bracket assy 2 3 2 5mm Pan head screw S P washer M3 x 6 ...

Page 122: ...nner rotary hook assy 2 Pull the thread by a tension gauge and turn the spring adjusting screw adjust the tension to 0 1 to 0 12N 10 to 12g 3 After adjustment apply a small amount of the thread locker to the spring adjusting screw XA9153001 Tension gauge 30 0 3N 0 1 0 12mm 10 12g Schappe Spun Thread 60 Sprig adjusting screw ...

Page 123: ...the correction value by pressing the Stitch length adjustment key so that length of 5 patterns should be 36 to 44mm If the length of 5 patterns is shorter than 36mm Press the side of the key to lengthen the stitch If the length of 5 patterns is longer than 44mm Press the side of the key to shorten the stitch Presser foot N presser foot Upper thread Lower thread Shappe Span thread 60 Cloth Two ply ...

Page 124: ...ting position 5 4 Pattern cannot be selected 5 5 Main motor does not turn 5 6 Main motor rotation abnormal 5 8 Cannot sew pattern correctly 5 9 Cannot sew button hole correctly 5 10 Problems with vertical needle movement and reverse stitching 5 11 Does not operate when the foot controller is used 5 12 Bobbin winding cannot be done 5 13 LED lamp does not come on 5 14 LCD display is not normal 5 15 ...

Page 125: ...y Cause F1 5 17 Abnormal rotation in main motor F2 5 17 Key pressed continually with power ON performance system SW F3 5 18 Key pressed continually with power ON operation system SW F4 5 18 FC disconnect F5 5 19 Dirty speed sensor F7 5 20 Speed VR disconnect F8 5 20 Power failure ...

Page 126: ...ectly Y N Y Y N Replace the power supply PCB assy Replace the power lead wire assy N Is the resistance between the pins 1 1 2 2 3 3 4 4 and 5 5 at the power lead wire assy 1Ω or less When the inlet assy connector is disconnected from the power supply PCB assy and the power is turned on is the voltage between pins 100V AC When the power lead wire assy is disconnected from the power supply PCB assy ...

Page 127: ... N Y Is the resistance between the 1 2 pins and 3 4 pins on the pulse motor connectors 6 7 7 7Ω N Replace the ZPM lead wire assy Replace the pulse motor N Y When the Z pulse motor does not return to starting point is the resistance between the pins 1 4 2 3 3 2 and 4 1 at the ZPM lead wire assy 1Ω or less Y Replace the FPM lead wire assy When the F pulse motor does not return to starting point is t...

Page 128: ...5 5 Electronic Parts Failure Investigation for Electronic Parts Pattern cannot be selected Pattern cannot be selected Replace the operation PCB assy or Replace the main PCB assy ...

Page 129: ...ain motor connector correctly connected to the power PCB assy CN401 Is the power lead wire assy free from damage and correctly connected to the main PCB assy and power supply PCB assy Replace the main motor N When press the start stop button reverse stitch button and needle position button does the buzzer sound Is F6 displayed Does the pulley turn smoothly Connect the power lead wire assy correctl...

Page 130: ...evious page Replace the main PCB assy or Replace the power supply PCB assy or Replace the main motor Are the resistance values for the PF switch assy normal PF switch assy resistance values When switch is pressed 1Ω or less When switch is not pressed 1MΩ In the case of abnormal when press the start stop button E1 is displayed Is the presser foot lever down Y ...

Page 131: ...motor connector correctly connected to the power supply PCB assy CN401 Is the power lead wire assy connector correctly connected to the power supply PCB assy CN201 and the main PCB assy CN7 N Replace the SSVR PCB assy When the speed control lever is moved with the power ON does the voltage between pins 4 5 of CN1 on the SSVR PCB assy vary 0 7 4 2V DC N Y Reassemble the BW switch assy N Y Y Replace...

Page 132: ...eplace the pulse motor With the power OFF can you lightly more the needle bar left and right by hard N Reassemble the BW switch assy Is the BW switch OFF Is the resistance between pins 1 2 and 3 4 on the Z and F pulse motor connectors 6 7 7 7Ω N Connect it properly Is the Z pulse motor connector correctly connected to the main PCB assy CN10 Is the F pulse motor connector correctly connected to the...

Page 133: ...rd Pins 1 2 1Ω or less pins 2 3 more than 1MΩ BH lever pushed back Pins 1 2 more than 1MΩ pins 2 3 1Ω or less Attach the appropriate presser foot N N Replace main PCB assy Y Y Y N Adjust the BH lever or Replace the BH switch assy Adjust the BH lever or Replace the BH switch assy Is the resistance between pins 4 5 on the BH switch connector normal BH lever down 1Ω or less BH lever up more than 1MΩ ...

Page 134: ...th vertical needle movement and reverse stitching Reassemble the BW switch assy Replace the SSVR PCB assy Is the BW switch OFF Is the resistance for the start stop switch reverse stitch switch and needle position button normal Switch resistance values Switch depressed 1Ω or less Switch out more than 1MΩ N N Y Y Replace the main PCB assy ...

Page 135: ...tween pins 2 3 on the foot controller jack assy connector normal Foot controller disconnected 1Ω or less Foot controller connected more than 1MΩ Y Replace the foot controller or Replace the foot controller jack assy N Y When the foot controller is connected and press down the foot controller does the resistance between pins 1 3 on the foot controller jack assy connector vary 1 51KΩ Replace the mai...

Page 136: ...Replace the BW switch assy N Y Y Replace the main PCB assy Is the resistance between the BW F SW assy connector pins 1 2 normal Switch depressed bobbin winder shaft is right 1Ω or less Switch out bobbin winder shaft is left more than 1MΩ Is the BW F SW assy connector correctly connected to the main PCB assy CN1 Is the bobbin winder assy attached correctly Connect it properly N Y ...

Page 137: ...t it properly N Y Y Is the LCD back light PCB assy lead wire correctly connected to the operation PCB assy Replace the power supply PCB assy N Is the voltage between pins 4 3 at the power supply PCB assy connector 30V DC Connect it properly N Are the main PCB assy and the operation PCB assy correctly connected Replace the LED lamp assy or Replace the operation PCB assy or Replace the main PCB assy...

Page 138: ...ot normal Y N Connect it properly Replace the LCD display single light guide assy or Replace the operation PCB assy or Replace the main PCB assy Is the FFC of the LCD correctly connected to the operation PCB assy CN3 Y N Connect it properly Are the main PCB assy and the operation PCB assy correctly connected ...

Page 139: ...en the power supply PCB assy connector CN201 is disconnected are the voltages between pins 2 3 and 4 3 normal Between pins 2 3 5V DC Between pins 4 3 30V DC N Y Replace the power supply PCB assy Y Replace the main PCB assy N Replace the power lead wire assy Is the resistance between the pins 1 1 2 2 3 3 4 4 and 5 5 at the power lead wire assy 1Ω or less ...

Page 140: ...ced start the test mode and select the test mode 10 and press the reverse stitch button Does the motor correctly rotate after turning off and on the power N Replace the SSVR PCB assy or Replace the main PCB assy N Y OK F1 is displayed Is one of the Start Stop key Needle position key and Reverse stitch key stuck in a pressed down condition Y Release the key that is stuck F2 is displayed ...

Page 141: ...ustment key and stitch width adjustment key stuck in a pressed down condition N Y Release the key that is stuck F3 is displayed Replace the foot controller jack assy Is the lead wire of the foot controller jack assy free from damage Y N Connect it properly Is the foot controller jack assy correctly connected to the main PCB assy CN4 N Y Replace the main PCB assy F4 is displayed ...

Page 142: ... for Electronic Parts Error is displayed Reassemble the main PCB assy Is the main PCB assy attached correctly N Y Clean the dirty of the timing shutter Is the timing shutter of the upper shaft dirty N Y Replace the main PCB assy F5 is displayed ...

Page 143: ...e the main PCB assy F7 is displayed Replace the power supply PCB assy When the power lead wire assy is disconnected from the power supply PCB assy connector CN201 are the voltages between pins 2 3 and 4 3 normal Between pins 2 3 5V DC Between pins 4 3 30V DC N Y Replace the main PCB assy F8 is displayed ...

Page 144: ...projects the cause from contents of the malfunction of the products and explains the method of the fix and the maintenance When do not understand the cause of the malfunction and the method of the fix and the maintenance use this chapter ...

Page 145: ...B assy and main PCB assy connector disconnected Plug connector in 3 13 Bad main PCB assy Replace main PCB assy 2 13 3 13 Main PCB assy and operation PCB assy connector disconnected Plug connector in 3 13 Bad operation PCB assy Replace operation PCB assy 2 10 3 16 Sewing machine lamp LED lamp does not light machine operation normal Bad LED lamp assy Replace LED lamp assy 2 9 3 16 LED lamp assy and ...

Page 146: ...heck that the sewing machine starts and stops when SS button is pushed Bad main motor assy Replace main motor assy 2 15 3 11 Bad power PCB assy Replace power PCB assy 2 14 3 12 Does not start sewing When press SS button no electronic sounds SSVR PCB assy and main PCB assy connector disconnected Plug connector in 3 13 Bad SSVR PCB assy Replace SSVR PCB assy 2 9 3 18 Bad main PCB assy Replace main P...

Page 147: ...achment screw Reattach feed dog 2 24 3 35 Horizontal rattle in feed bar Reattach feed bar 2 25 3 34 Bad feed dog height adjustment Adjust feed dog height 4 19 Feed dog height Refer to Feed dog height 4 19 Bad feed dog front back position adjustment Adjust feed dog front back position 4 18 Feed dog front back position Refer to Front back and left right position of feed dog 4 18 Bad feed dog left ri...

Page 148: ...ial rattle Reattach lower shaft assy 2 29 3 26 Feed cam noise Feed cam out of oil Lubricate feed cam of lower shaft assy 3 9 Feed arm noise Bad feed arm Replace feed arm A assy 2 26 3 30 Noise from contact between needle plate A and feed dog Back front and left right rattle in feed dog Reattach feed dog 2 24 3 35 Bad feed dog front back position adjustment Adjust feed dog front and back position 4...

Page 149: ...angling Replace needle holder assy 2 34 3 44 Bad thread guide shape Replace threader hook assy 2 31 3 48 Needle thread shaft and top gap too small Replace needle holder assy 2 34 3 44 Needle thread lever operation catches part way through Bad needle stop position NP sensor damage Replace main PCB assy 2 13 3 13 Grease or dirt adhering to NP sensor Remove grease and dirt Rotation shutter damage Rep...

Page 150: ...ool presser Replace spool presser Scratches on outer rotary hook Replace outer rotary hook assy 2 24 3 34 Miss thread guide pathway Rethread Seam unevenness Presser foot inclines Adjust presser bar height and parallelism 4 13 Utility sewing straight line zigzag Check that stitches are not uneven during actual sewing Presser foot position is high does not hold material completely Adjust presser bar...

Page 151: ...r with Schappe Spun Sewing Thread 60 and confirm that there is no uneven bobbin winding or abnormal noises Check that the amount of thread wound onto the bobbin is 80 90 of the bobbin diameter Bad BW switch assy attachment position Reattach BW switch assy 2 19 3 5 Bad BW switch assy Replace BW switch assy 2 19 3 5 Bad main PCB assy Replace main PCB assy 2 13 3 13 Bobbin winding amount unsuitable B...

Page 152: ...7 1 7 Special Instructions of Wiring Needle bar Presser module wiring 7 2 Power supply unit wiring 7 6 Front cover wiring 7 9 ...

Page 153: ... of Wiring Needle bar Presser module wiring Pass a band through the hole of base holder and secure the lead wires with the band Hang the lead wires on the hooks Hang the ground lead wire on the hooks 1 Wiring of BH switch assy ...

Page 154: ...ng Pass a band through the hole of base holder and secure the lead wires with the band Cut end should face front Secure the lead wires to depressed portion of presser switch holder with the band 2 Wiring on upper side of needle bar presser module All lead wires should pass back side of the module ...

Page 155: ...ructions of Wiring Needle bar Presser module wiring 3 Wiring on front side of needle bar presser module Lead wires should pass under the ribs Hang the lead wires on the hook 4 Wiring on left upper side of main PCB assy ...

Page 156: ...al Instructions of Wiring Special Instructions of Wiring Needle bar Presser module wiring Hang the ground lead wire on the hooks 5 Wiring on right upper side of main PCB assy Hang the BW lead wires on the hooks ...

Page 157: ...of Wiring Power supply unit wiring 1 Wiring of foot controller jack assy 2 Wiring on lower side of power supply unit Surely insert the connector Pass the lead wires of foot controller jack assy between the main motor and cover ...

Page 158: ...Special Instructions of Wiring Special Instructions of Wiring Power supply unit wiring 3 Wiring on upper side of power supply unit 4 Wiring on left side of power supply unit Hang the lead wires on the hooks ...

Page 159: ... supply unit wiring 5 Wiring of power supply unit and main PCB assy Hang the ferrite core that is passed the lead wires on the hook Hang the lead wires on the hooks Wind the lead wires around the rib once Lead wires should pass inside the rib ...

Page 160: ... Special Instructions of Wiring Front cover wiring 1 Wiring of LED lamp assy Pass the lead wires between the boss and rib Pass the lead wires between 2 bosses Hang the lead wires on the hook Pass the lead wires between the PCB and cover ...

Page 161: ...7 10 Special Instructions of Wiring Front cover wiring Secure the lead wires with a bands 2 Wiring of LED assy 3 Wiring of operation PCB assy Connector of LED lamp Connector of LCD module ...

Page 162: ...7 11 Special Instructions of Wiring Special Instructions of Wiring Front cover wiring 4 Wiring of front cover and main PCB Hang the front cover lead wires on the 3 hooks Rear cover Front cover ...

Page 163: ...7 12 ...

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