Janome MC 350E Page 2 Service Manual Download

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GENERAL TROUBLESHOOTING PROCEDURE

Changing External Parts (1) Face Cover ............................................................. 1

Changing External Parts (2) Belt Cover ............................................................... 2

Changing External Parts (3) Base Cover ............................................................. 3

Changing External Parts (4) Bed Cover/Base Lid (2) .......................................... 4

Changing External Parts (5) Base ....................................................................... 5

Changing External Parts (6) Front Cover ............................................................. 6

Changing External Parts (7) Rear Cover ............................................................. 7

Adjusting Needle Drop Position ........................................................................... 8

Adjusting Hook Timing ......................................................................................... 9

Adjusting Needle Bar Height ............................................................................... 10

Adjusting Clearance between Needle and Hook ................................................ 11

Adjusting Backlash between Hook Drive Gear and Lower Shaft Gear ............... 12

Adjusting Height of the Needle Stop Position ..................................................... 13

Adjusting Thread Tension .................................................................................... 14

Adjusting Tension Release Mechanism .............................................................. 15

Changing Thread Tension Unit ............................................................................ 16

Replacing Threader Plate and Adjustment ......................................................... 17

Adjusting Height of Embroidery Foot P ............................................................... 18

ADJUSTMENT FOR ELECTRICAL COMPONENTS

Connector Connection Diagram .......................................................................... 19

Replacing Printed Circuit Board “A” (Main board) ............................................... 20

Replacing Touch Panel ....................................................................................... 21

Replacing Printed Circuit Board “F” & “F2” ......................................................... 22

Adjustment of the Solenoid ................................................................................. 23

Replacing DC Motor and Motor Belt Tension Adjustment ................................... 24

Replaching Carriage Plate (Unit) ........................................................................ 25

Adjusting X and Y Sensors ................................................................................. 26

Adjusting X and Y Sensors (Simple Adjustment) ................................................ 27

Adjusting X Mortor Gear ..................................................................................... 28

Replacing Switching Power Supply ..................................................................... 29

Summary of Contents for MC 350E

Page 1: ......

Page 2: ...Lower Shaft Gear 12 Adjusting Height of the Needle Stop Position 13 Adjusting Thread Tension 14 Adjusting Tension Release Mechanism 15 Changing Thread Tension Unit 16 Replacing Threader Plate and Adj...

Page 3: ...anging External Parts 1 Face Cover Replacing th face cover To remove 1 Remove the Cap and Screw and remove the Face Cover Cap Screw Face cover To attach 2 Follow the above procedure in reverse A B C A...

Page 4: ...e the Cap and Screw 2 Raise the Carrying Handle and remove the Screw 3 Lay the machine on its back and remove Screws 2 pcs gold color then remove the Belt cover Cap Screw Screw Screw Belt cover To att...

Page 5: ...Changing External Parts 3 Base Cover Replacing the base cover To remove 1 Remove Screws 4 pieces to remove the base cover Screws Base cover To attach 2 Follow the above procedure in reverse A B A B A...

Page 6: ...2 pcs and remove the Base Lid 3 Remove Screw 2 pcs and remove the Bed cover Screw Base lid Screw Bed cover To attach 4 Follow the above procedure in reverse A B C D C B A D A B C D Replacing base Lid...

Page 7: ...printed circuit board A 5 Insert the X Y Motor Cords between the printed cuircuit board A and Arm Be sure the cords are not caught between the Joint Bosses of the arm and base Tighten Screws 4 pieces...

Page 8: ...s 3 turns 5 Disconnect the each connector and remove the front cover Note Disengage the Hooks to remove the Front cover Screw Arm thread guide Lower Screw Screw Screw Hooks To attach 6 Follow the abov...

Page 9: ...Parts 7 Rear Cover 1 Remove the face cover and belt cover See page 1 2 2 Loosen Screw and remove the rear cover Screw Screw Screw Screw To attach 3 Follow the above procedure in reverse Rear cover To...

Page 10: ...e face cover and loosen Screw move the Needle bar supporter to the right or left until the needle comes to the center of the Needle plate hole 3 Tighten the Screw 4 Attach the face cover Screw Needle...

Page 11: ...ar at its lowest position by turning the handwheel toward you 4 Raise the needle bar 3 4 mm up from the lowest position 5 Loosen the Screws of lower shaft gear turn the Lower shaft gear until the tip...

Page 12: ...ion until the tip of the rotary hook meets with the left side of the needle Turn the handwheel to raise the needle bar further 1 8 mm 4 Loosen the Setscrew 5 Move the Needle bar up or down to align th...

Page 13: ...y hook to 0 1 to 0 05mm by moving the Rotary hook set plate up or down Tighten the Screws firmly 5 Check the rotary hook driver gear and the lower shaft gear backlash If gears mesh or engage tightly o...

Page 14: ...n 0 8 mm or the gears do not turn smoothly adjust the backlash as follows Adjustment procedure 1 Remove the bed cover See page 4 and loosen the Screw 2 Turn the Lower shaft bushing Eccentric in the di...

Page 15: ...eedle stops higher than 14 2 mm loosen Screw and turn the Upper shaft shield plate in the direction of A B If the needle stops lower than 14 2 mm loosen Screw and turn the Upper shaft shield plate in...

Page 16: ...approximately 110 mm sec in the direction of arrow 1 Set the tension dial at 3 2 Lower the presser foot 3 Remove the front cover unit See P 6 3 If the thread tension is more than 59g turn the lead sc...

Page 17: ...tension dial at 9 and loosen the Screw 3 Adjust the play between the tension release rod 2 and the Spring holder approximately 0 3 0 5 mm and tighten the Screw 4 Raise the presser foot lifter turn the...

Page 18: ...on unit To remove 1 Remove the front cover unit see page 6 2 Remove Screws and 3 Remove the thread tension unit To attach 4 Follow the above procedure in reverse Note After the replacement adjust Thre...

Page 19: ...Hook Threader plate Screw Screw Setting position plate Adjusting threader plate position Fig 2 1 When the Hook is slightly touching the needle eye loosen Screw and adjust the Threader plate as shown...

Page 20: ...page 7 2 Lower the Needle and lower the presser foot lifter 3 Insert the 1 2 mm Feeler gauge between the Embroidery Foot P and the Needle plate 4 While pressing the Presser bar actuator down against...

Page 21: ...m Please see the following connector connection diagram for the printed circuit board A Main board LCD Harness Inverter White DC motor White Touch panel Lamp X Motor Blue Y Motor White Bobbin winder s...

Page 22: ...e 6 2 Pull out the connectors of printed circuit board F LCD Harness Inverter and Touch panel 3 Remove Screws 5 pieces and the Printed circuit board A Main board with the Card guide To attach 4 Follow...

Page 23: ...inst the Ribs Fix the Touch panel with the Fixing plate bottom while press it against the Touch panel and tighten screws 5 Place the Fixing plate top and secure it with Screws while pressing the Fixin...

Page 24: ...2 pieces and remove the Printed circuit board F Start Stop To attach 4 Follow the above procedure in reverse A B To remove 1 Remove the front cover See page 6 2 Pull out the connector from the printe...

Page 25: ...oid B A The plunger is drawn in direction of Arrow 1 Remove the front cover see page 6 2 Loosen the setscrews 3 Adjust the clearance of Solenoid 1 6 mm with the tension disk closed 4 Tighten the setsc...

Page 26: ...board A Main board 4 Remove Screws 2 pieces and replace the motor 5 Attach the motorand tighten Screws 2 pieces slightly Adjusting motor belt tension 1 Adjust the Belt deflection to about 5 0 mm by pr...

Page 27: ...r switch ON to return the carriage to the home position 4 Remove Screws 3 pieces and remove the Carriage plate unit To attach 5 Attach the Carriage plate unit and tighten screws temporarily 6 Adjust t...

Page 28: ...oosen Screw and adjust dimension Y to 2 5 mm by moving the Y Sensor attaching plate 4 Loosen Screw to adjust Dimension X 1 to 69 0 mm and Dimension X 2 to 2 5 mm by moving the X Shield plate 5 Tighten...

Page 29: ...e screw and move the Y sensor fixing plate to adjust the needle position 7 If the needle position shifts in X direction loosen Screw through the sheet cover fixing plate hole and adjust the X shield p...

Page 30: ...en the thread tension disks as shown so that the needle thread sensor will not work 8 Run the machine and loosen Screws 2 pieces and move the X Motor to detect the quitest position while the carriage...

Page 31: ...rews 2 pieces and take out Switching power supply To attach 6 Follow the above procedurte in reverse 7 Move the Idler to adjust the Belt deflection to about 4 0 mm by pressing the middle of the Timing...

Page 32: ...PARTSLIST 2 MC 350E 1 2 8 6 4 7 7 5 9 10 11 12 13 14 19 20 21 22 17 28 29 24 31 32 33 34 26 27 25 23 18 18 30 17 15 16 7 3 35 36 36 37 38...

Page 33: ...edle plate Hook cover plate supporter Setscrew 2x4 Hook cover plate release button Spring Setscrew 2x2 3 Rotation stopper Needle plate setscrew Hook cover plate Needle plate positioning pin Hexagonal...

Page 34: ...PARTSLIST 4 MC 350E 1 2 7 4 5 6 7 8 9 3 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 30 31 32 33 34 35 36 37 38 39 40 41 43 42 43 44 45 37 37 49 50 48 47 29 46 51 52 42 36...

Page 35: ...ket screw 3x4 Needle bar unit Threader positioning setting plate unit Needle bar connecting stud Hexagonal socket screw 4x4 Threader positioning setting plate Threader positioning setting block Setscr...

Page 36: ...PARTSLIST 6 MC 350E 1 2 6 5 3 4 8 8 9 10 11 12 13 14 14 15 15 4 4 16 17 4 7 18 7 9...

Page 37: ...13 854118003 14 000070230 15 000002301 16 854137008 17 854119004 18 854120008 Clutch base plate unit Clutch base plate Clutch starting lever Snap ring E3 Clutch arm 2 Clutch arm Clutch arm 2 spring Sn...

Page 38: ...PARTSLIST 8 MC 350E 18 19 20 12 3 6 7 8 9 10 12 13 14 15 29 4 5 1 2 22 16 28 17 16 21 23 24 25 26 27 16 11 30 34 33 32 31 35 38 37 36 39...

Page 39: ...er bar bushing Presser bar spring Presser bar Embroidery foot P Setscrew Presser bar supporter unit Hexagonal socket screw 4x8 Washer 5 Presser foot lifter Presser foot lifter pin Thread tension relea...

Page 40: ...PARTSLIST 10 MC 350E 1 3 5 6 7 8 9 10 11 13 15 16 17 12 14 18 19 20 21 11 22 23 24 25 26 27 28 29 25 30 31 32 34 35 37 37 4 36 2 33 38 38...

Page 41: ...143007 Upper shaft unit Setscrew 4x12 Setscrew 3x6 Hexagonal socket screw 5x4 Hexagonal socket screw 5x8 Upper shaft front bushing Washer 10x0 5 Upper shaft ring Hexagonal socket screw 5x5 Upper shaft...

Page 42: ...PARTSLIST 12 MC 350E 6 1 2 3 4 5 5 7 8 9 10 10 11 11 8 9 10 10 12 13 14 13 13 15 16 17 18 19 13 20 22 21 25 24 23...

Page 43: ...2 000004200 23 850687006 24 854628012 25 000114802 Hook race unit Bobbin holder stopper unit Magnet Washer 4 Setscrew 4x8 Bobbin holder unit Bobbin Lower shaft ring unit Lower shaft ring Hexagonal soc...

Page 44: ...PARTSLIST 14 MC 350E 1 2 3 4 5 6 7 8 12 9 10 11 12 13 13 14 15 16 16 17 18 19 20 21 22 12 23 24...

Page 45: ...4 860557007 Front cover whole unit JAI JCA Front cover whole unit JNBV JA JUK JLA Front cover LCD unit LCD set plate upper LCD set plate lower unit Inverter unit LCD harness unit Printed circuit board...

Page 46: ...TSLIST 16 MC 350E 30 31 32 33 34 34 34 35 11 1 2 3 4 5 6 7 8 9 10 11 36 12 13 14 15 16 17 18 19 20 21 22 23 24 25 11 50 26 27 28 11 29 37 38 39 11 44 43 45 47 49 40 41 50 42 48 46 48 51 52 53 11 43 54...

Page 47: ...ing E5 Bobbin winderswitch unit Micro switch unit switchset plate2 Insulation paper Setscrew 1 7x6 Setscrew 4x8 Rear cover unit JAI JCA JNBV JA JUK Rear cover unit JLA Rear cover JAI JCA JNBV JA JUK R...

Page 48: ...PARTSLIST 18 MC 350E 1 2 3 3 4 5 6 7 8 9 10 11 12 5 13 14 3 16 17 18 19 3 20 21 3 22 23 24 25 3 26 27 28 29 30 3 31 15...

Page 49: ...it Setscrew 4X8 Thread cutter cover set plate Setscrew 3X4 Needle thread solenoid unit Needle thread solenoid unit Solenoid set plate Setscrew 2 6X4 Thread drawing leverArm Knock pin 2 5X8 Thread draw...

Page 50: ...PARTSLIST 20 MC 350E 1 2 3 4 5 6 5 5 7 8 9 9 10 10 11 14 12 13 15 16 17 18 5 19 23 21 22 20 24 25 26 11...

Page 51: ...512108 24 853022006 25 857025001 26 000101404 Idler unit Idler base Idler Snap ring E6 Setscrew 4x8 Carrying handle supporter rear Belt cover unit Belt cover Belt cover attaching plate 1 Setscrew 3x6...

Page 52: ...PARTSLIST 22 MC 350E 1 2 3 4 5 6 7 8 8 9 8 10 11 12 13 14 15 16 17 18 19 20 21...

Page 53: ...14 000066727 15 850627101 16 850169007 17 000078319 18 850156001 19 000127107 20 851071015 21 717618000 Base unit Rubber foot Adjusting screw Spring Rubber foot Snap ring CS Base lid Setscrew Base li...

Page 54: ...PARTSLIST 24 MC 350E 1 2 3 4 5 6 7 8 9 12 10 11 13 14 15 16 17 18 19...

Page 55: ...ories unit Bobbin Felt Lint brush Screwdriver large Scissors Additional spool pin Spool holder small Needle unit Spool stand Screwdriver Spool holder large Instruction book unit JAI Instruction book u...

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Janome MC 350E, Service Manual

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