Janome MC6600 Service Manual
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Janome MC6600 Service Manual

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Revised on October 20, 2005

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Summary of Contents for Janome MC6600

  • Page 1 Revised on October 20, 2005...

  • Page 2: Table Of Contents

    INDEX TO REMOVE FACE PLATE AND TOP COVER ..............1 TO REMOVE BELT COVER AND MACHINE BASE ............2 TO REMOVE AUTO THREAD CUTTER COVER .............. 3 TO REMOVE FRONT COVER ................... 4 TO REPLACE THREAD GUIDE COVER ................5 TO REPLACE ARM THREAD GUIDE (2) ................

  • Page 3: To Remove Face Plate And Top Cover

    TO REMOVE FACE PLATE AND TOP COVER SETSCREW (B) TOP COVER SETSCREW (C) PRESSURE DIAL CONNECTOR (D) CONNECTOR CASE FACE PLATE WASHER SETSCREW (A) FACE PLATE <TO REMOVE> REMOVE THE SETSCREW (A) TO REMOVE THE FACE PLATE. <TO ATTACH> ATTACH THE FACE PLATE WITH THE SETSCREW (A).

  • Page 4: To Remove Belt Cover And Machine Base

    TO REMOVE BELT COVER AND MACHINE BASE PROJECTION (F) BELT COVER [TO REMOVE] BELT COVER 1. REMOVE THE SETSCREWS (A), (B) AND (C). 2. REMOVE THE BELT COVER. [TO ATTACH] SETSCREW (A) 3. ATTACH THE BELT COVER BY INSERTING THE PROJECTIONS (D), (E) AND (F) AND TIGHTEN THE SETSCREWS (A), (B) AND (C).

  • Page 5: To Remove Auto Thread Cutter Cover

    TO REMOVE AUTO THREAD CUTTER COVER [TO REMOVE]: LOOSEN THE SETSCREW (A) AND PULL OFF THE AUTO THREAD CUTTER COVER. SETSCREW [TO ATTACH]: REPLACE THE AUTO THREAD CUTTER COVER AND TIGHTEN THE SETSCREW (A). AUTO THREAD CUTTER COVER...

  • Page 6: To Remove Front Cover

    TO REMOVE FRONT COVER [TO REMOVE] SETSCREW (A) 1 REMOVE THE FACE PLATE, TOP COVER AND BELT COVER (REFER TO PAGES 1 AND 2). 2 LOOSEN THE SETSCREWS (A), (B), (C) AND (D). 3 PULL OUT THE CONNECTORS (REFER TO PAGE 22) AND REMOVE THE FRONT COVER.

  • Page 7: To Replace Thread Guide Cover

    TO REPLACE THREAD GUIDE COVER [TO REMOVE]: THREAD GUIDE 1. REMOVE THE FACE PLATE AND TOP COVER. COVER (C) SETSCREW (A) 2. REMOVE THE SETSCREWS (A) AND (B). REMOVE THE THREAD GUIDE COVER (C). [TO ATTACH]: 1. ATTACH THE THRED GUIDE COVER, ENGAGING THE SLIT WITH THE THREAD GUIDE PLATE (D).

  • Page 8: To Replace Arm Thread Guide (2)

    TO REPLACE ARM THREAD GUIDE (2) [TO REMOVE]: 1. REMOVE THE FACE PLATE AND MOVE THE LAMP SETSCREW (A) TO THE LEFT. 2. REMOVE THE SETSCREWS (A), (B) AND (C). REMOVE THE ARM THREAD GUIDE (2). [TO ATTACH]: 3. REVERSE THE ABOVE PROCEDURE. ARM THREAD GUIDE (2) LAMP SETSCREW (B)

  • Page 9: To Replace Circuit Board A And Fuse

    TO REPLACE CIRCUIT BOARD A AND FUSE MOUNTING PRINTED CIRCUIT BRACKET BOARD A SETSCREW (D) [TO REMOVE] SETSCREW (A) SETSCREW (A) 1 REMOVE THE FRONT COVER SETSCREW (D) (REFER TO PAGE 4). 2 REMOVE THE 4 SETSCREWS (A). REMOVE THE CIRCUIT BOARD A TOGETHER WITH THE MOUNTING BRACKET.

  • Page 10: To Remove Circuit Board K

    TO REMOVE CIRCUIT BOARD K SLIDE VOLUME CONNECTOR SETSCREWS SETSCREWS [TO REMOVE] 1. REMOVE THE FRONT COVER (REFER TO PAGE PULL OUT SLIDE VOLUME CONNECTOR. 2. REMOVE THE 8 SETSCREWS AND CIRCUIT BOARD K. [TO ATTACH] PROCEED WITH THE ABOVE PROCEDURE IN REVERSE.

  • Page 11: To Remove Circuit Board F And Slide Volume

    TO REMOVE CIRCUIT BOARD F AND SLIDE VOLUME [TO REMOVE THE CIRCUIT BOARD F] 1. REMOVE THE FRONT COVER (REFER TO PAGE 2. PULL OUT THE CONNECTOR FROM THE CIRCUIT CIRCUIT BOARD F BOARD A. 3. REMOVE THE 4 SETSCREWS (A), 2 CS RINGS AND CIRCUIT BOARD F.

  • Page 12: Connection Of Connectors

    CONNECTION OF CONNECTORS LOWER SHAFT SENSOR (BLACK 5 PINS) CIRCUIT BOARD F PRESSER BAR BOBBIN WINDER (BLACK 7 PINS) SWITCH (BLACK 4 PINS) (BLACK 2 PINS) LAMP (WHITE 2 PINS) BH SENSOR (BLACK 3 PINS) CIRCUIT BOARD K (BLACK 32 PINS) AUTO THREAD CUTTER SWITCH CIRCUIT BOARD A...

  • Page 13: To Adjust Needle Drop Position

    TO ADJUST NEEDLE DROP POSITION WHEN THE STRAIGHT STITCH IS SELECTED, THE NEEDLE SHOULD BE AT THE CENTER OF THE HOLE OF THE NEEDLE PLATE. WHEN THE MAXIMUM ZIGZAG WIDTH IS SELECTED, THE DISTANCE BETWEEN THE NEEDLE AND THE EDGE OF THE HOLE OF THE NEEDLE PLATE AT THE RIGHT AND LEFT NEEDLE POSITIONS SHOLD BE 0.2 MM OR MORE AS SHOWN IN FIG.

  • Page 14: To Adjust The Backlash Of Hook Drive And Lower Shaft Gears

    TO ADJUST THE BACKLASH OF HOOK DRIVE AND LOWER SHAFT GEARS THE GEARS TURNS SMOOTHLY AND ROTARY PLAY OF THE HOOK SHOULD BE 0.8 MM OR LESS (F) WHEN THE TIP OF HOOK (E) IS WITHIN THE WIDTH OF THE FEED DOG (C) AS SHOWN BELOW.

  • Page 15: Adjustment Of Hook Timing

    ADJUSTMENT OF HOOK TIMING THE AMOUNT OF ASCENDING TRAVEL OF THE NEEDLE BAR FROM ITS LOWEST POSITION TO THE POSITION WHERE THE TIP OF THE ROTARY HOOK EXACTLY MEETS THE RIGHT SIDE OF THE NEEDLE SHOLD BE 3.25 TO 3.55 MM. [TO ADJUST]: 1 REMOVE THE MACHINE BASE (REFER TO PAGE 2) NEEDLE...

  • Page 16: Adjustment Of Needle Bar Height

    ADJUSTMENT OF NEEDLE BAR HEIGHT BEFORE PROCEEDING WITH THIS ADJUSTMENT, CHECK THE HOOK TIMING (REFER TO PAGE 13). THE DISTANCE BETWEEN THE UPPER EDGE OF THE NEEDLE EYE AND THE TIP OF THE HOOK SHOULD BE IN THE RANGE OF 1.6 - 2.0MM WHEN THE TIP OF THE HOOK MEETS RIGHT SIDE OF THE NEEDLE IN THE LEFT NEEDLE POSITION ( ) AS THE NEEDLE ASCENDS FROM ITS LOWEST POSITION.

  • Page 17: Adjustment Of Clearance Between Needle And Rotary Hook

    ADJUSTMENT OF CLEARANCE BETWEEN NEEDLE AND ROTARY HOOK THE CLEARANCE BETWEEN NEEDLE AND THE TIP OF THE ROTARY HOOK (J) SHOULD BE BETWEEN -0.1 AND +0.05 MM [ADJUSTMENT I] 1.REMOVE THE FACE PLATE, AND ATTACH A HEXAGONAL HOLE OF NEEDLE MASTER NEEDLE (I).

  • Page 18: Adjustment Of Direction Of Presser Bar And Its Height (1)

    ADJUSTMENT OF DIRECTION OF PRESSER BAR AND ITS HEIGHT (1) WHEN THE PRESSER FOOT IS LIFTED, THE DISTANCE BETWEEN THE SURFACE OF THE NEEDLE PLATE AND THE BOTTOM OF THE ZIGZAG FOOT SHOULD BE 6 MM. WHEN THE PRESSER BAR IS LOWERED, THE PRESSER FOOT SHOULD BE PARALLEL WITH THE SLOTS FOR THE FEED DOGS.

  • Page 19: Adjustment Of Direction Of Presser Bar And Its Height (2)

    ADJUSTMENT OF DIRECTION OF PRESSER BAR AND ITS HEIGHT (2) 11 LOOSEN THE SETSCREW ON THE ROTATION ROTATION STOPPER STOPPER WHILE THE PRESSER FOOT HOLDING SETSCREW THE BLOCK (A). ADJUST THE DIRECTION OF THE PRESSER BAR. THE DISTANCE BETWEEN THE BLOCK AND THE ROTATION STOPPER MUST BE 0.3 MM.

  • Page 20: To Adjust The Feed Dog Height

    TO ADJUST THE FEED DOG HEIGHT WHEN THE PRESSURE ADJUSTING DIAL IS AT ì3î AND THE PRESSER FOOT (A) IS LOWERED, THE HIGHEST POSITION OF THE FEED DOG (B) SHOULD BE 0.80 TO 0.90 MM (C) FROM THE SURFACE OF THE NEEDLE PLATE (D). [TO ADJUST]: 1.

  • Page 21: To Replace Needle Thread Tension Unit

    TO REPLACE NEEDLE THREAD TENSION UNIT SETSCREW (A) [TO REMOVE]: 1. REMOVE THE FACE PLATE. 2. LOOSEN THE SETSCREWS (A) AND (B). REMOVE THE THREAD GUIDE COVER (C). 3. LOOSEN THE HEXAGONAL SOCKET SCREW (D). 4. REMOVE THE TENSION RELEASE PLATE (F) FROM THE TENSION RELEASE ARM (E).

  • Page 22: To Adjust The Upper Thread Tension Release (1)

    TO ADJUST THE UPPER THREAD TENSION RELEASE (1) THE CLEARANCE OF UPPER THREAD TENSION DISKS SHOULD BE 0.8 MM WHEN THE PRESSER FOOT IS RAISED. THREAD 1. REMOVE THE FACE PLATE AND ARM THREAD TENSION DISK GUIDE (2). 2. LOOSENTHE SETSCREW. 3.

  • Page 23: To Adjust The Upper Thread Tension Release (2)

    TO ADJUST THE UPPER THREAD TENSION RELEASE (2) UPPER THREAD TENSION DISKS SHOULD OPEN 0.8 MM WHEN THE TENSION RELEASE MOTOR OPERATES. IF NOT, ADJUST FOLLOWS. REMOVE THE FACE PLATE, TOP COVER AND BASE FIG. 1 THREAD GUIDE COVER. SET THE THREAD TENSION DIAL TO “9”. LOWER THE PRESSER FOOT LIFTER.

  • Page 24: To Adjust The Upper Thread Tension

    TO ADJUST THE UPPER THREAD TENSION THE UPPER THREAD TENSION SHOULD BE 65 - 80 GRAMS WHEN PULLING THE THREAD (WHILE POLYESTER THREAD SIZE 50) AT THE SPEED OF 110 MM/SEC WITH THE TENSION DIAL AT ì4î (MAKE SURE THE FOOT IS LOWERED.) 1 SET THE THREAD TENSION DIAL (A) TO ì4î.

  • Page 25: To Adjust The Bobbin Winder Stopper

    TO ADJUST THE BOBBIN WINDER STOPPER THE DIAMETER OF THREAD WOUND ON BOBBIN SHOULD BE 16.5 TO 19.5 MM. TO ADJUST THE THREAD AMOUNT FOR BOBBIN, LOOSEN THE SETSCREW AND TURN THE BOB- BIN WINDER STOPPER IN THE DIRECTION OF (A) OR (B).

  • Page 26: To Replace Needle Threader Plate

    TO REPLACE NEEDLE THREADER PLATE [TO REMOVE]: 1 REMOVE THE FOOT HOLDER. PIN (B) (FIG.I) 2 PULL OUT THE THREADER PLATE UNIT (A). THREADER PLATE UNIT (A) [TO ATTACH]: 3 PUSH THE THREADER PLATE UNIT (A) UP TO SNAP IT WITH THE PIN (B) AS SHOWN IN FIG. I. 4 ATTACH THE FOOT HOLDER (FIG.

  • Page 27: To Replace Auto Thread Cutter

    TO REPLACE AUTO THREAD CUTTER AUTO THREAD CUTTER SLIDING PLATE PIN (B) SETSCREW [TO REMOVE]: 1 REMOVE THE NEEDLE PLATE, MACHINE BASE AND AUTO THREAD CUTTER COVER (REFER TO HOLE PAGE 2 AND 3). 2 REMOVE THE 2 SETSCREWS (A) AND REMOVE THE AUTO THREAD CUTTER.

  • Page 28: To Adjust Thread Drawing Lever

    TO ADJUST THREAD DRAWING LEVER THE MAXIMUM HEIGHT OF THE THREAD DRAWING LEVER SHOULD BE BETWEEN 5.5 TO 5.7 MM. REMOVE THE NEEDLE PLATE. THREAD DRAWING LEVER LOOSEN THE HEXAGONAL SOCKET SCREW. WHEN THE THREAD DRAWING LEVER IS AT THE HIGHEST POSITION, ADJUST THE DRAWING LEVER SO THE DISTANCE BETWEEN BOBBIN HOLDER AND THE DRAWING LEVER IS 5.6 MM.

  • Page 29: To Adjust Upper Feed Dog (1)

    TO ADJUST UPPER FEED DOG (1) THE CLEARANCE BETWEEN THE UPPER FEED LINK SHAFT AND UPPER FEED LOWER SHAFT SHOULD BE 2.5 MM WHEN THE UPPER FEED ADJUSTING DIAL IS SET TO “0”. TO CHECK UPPER FEED DOG ADJUSTING DIAL 1.

  • Page 30: To Adjust Upper Feed Dog (2)

    TO ADJUST THE UPPER FEED DOG (2) UPPER FEED DOG ADJUSTING DIAL 1 ATTACH THE DUAL FEED FOOT. 2 SET THE UPPER FEED DOG. TURN THE POWER SWITCH ON. SELECT THE MODE 1, THEN SELECT THE STITCH #1 ( 3 PRESS THE STITCH LENGTH ADJUSTING KEY. SET THE STITCH LENGTH TO 0.

  • Page 31: To Adjust Upper Feed Dog Height

    TO ADJUST UPPER FEED DOG HEIGHT 1 ATTACH THE DUAL FEED FOOT. MATCH THE UPPER EDGE OF 2 REMOVE THE FACE PLATE AND TOP COVER. THE NEEDLE EYE AND THE UPPER 3 SET THE UPPER FEED DOG. TURN THE POWER SURFACE OF THE SWITCH ON.

  • Page 32: Thread Take-Up Lever Phase

    THREAD TAKE-UP LEVER PHASE INSERT THE NEEDLE BAR CRANK PIN INTO THE TAKE-UP LEVER CRANK AS ILLUSTRATED. THE SETSCREW (A) MUST HOLD THE NEEDLE BAR CRANK PIN CUT SURFACE. THREAD TAKE-UP LEVER SETSCREW (A) TAKE-UP LEVER CRANK NEEDLE BAR CRANK PIN CUT SURFACE...

  • Page 33: To Adjust Upper Shaft Clutch

    TO ADJUST UPPER SHAFT CLUTCH CLUTCH BASE (UNIT) ANGLE VIEW A SETSCREW 12.3° WHEN THE CUT SURFACE OF THE UPPER SHAFT IS PARALLE TO THE GROUND, THE UPPER SHAFT CRANK AXIS SHOULD BE A 12.3-DEGREE CUT SURFACE ANGLE. CLUTCH BASE NEEDLE TAKE-UP LEVER CRANK CLUTCH BASE SETSCREW...

  • Page 34: Lower Shaft

    LOWER SHAFT TO ATTACH THE LOWER SHAFT PARTS ANGLE: THE ANGLE FOR (A), (B), (C) AND (D) IS SAME AS THAT OF THE SPRING PIN (D) ON THE LOWER SHAFT GEAR. THE PHASE FOR (E), (F) ARE SHOWN THE ILLUSTRATION BELOW. SPRING PIN (D) 3 X 18 FEED CAM (C)

  • Page 35: Timing Belt

    TIMING BELT SET THE THE MARK (A) TO THE TOP OF THE MARK (A) CAM, WHEN THE MARK (B) POINTING UPWARD. ATTACH THE BELT. MARK (B) SPRING PIN LOWER SHAFT GEAR...

  • Page 36: To Replace Driving Motor

    TO REPLACE DRIVING MOTOR [TO REMOVE] 1 REMOVE THE FRONT COVER. (REFER TO PAGE 4) 2 REMOVE THE MOTOR BELT. 3 PULL OUT THE CONNECTOR FROM THE CIR- CUIT BOARD A. 4 REMOVE THE 2 SETSCREWS (A) AND PULL OUT THE DRIVING MOTOR.

  • Page 37: To Adjust Zigzag Timing

    TO ADJUST ZIGZAG TIMING WHEN THE MACHINE IS SET FOR ZIGZAG STITCH- ING, THE NEEDLE SHOULD START TO ZIGZAG 8.0 MM TO 8.4 MM (C = HEIGHT OF ZIGZAG FOOT) ABOVE THE SURFACE OF THE NEEDLE PLATE. 1 SET THE MACHINE FOR ADJUSTING MODE BY TURNING THE POWER SWITCH WHILE PRESS- ING THE NEEDLE UP/DOWN AND THE LOCK STITCH BUTTONS AT A TIME.

  • Page 38: To Adjust Buttonhole Lever Position

    TO ADJUST BUTTONHOLE LEVER POSITION 1 WHILE PRESSING THE NEEDLE UP/DOWN AND LOCK STITCH KEYS, TURN THE POWER SWITCH ON. PRESS THE NUMBER ì4î BUTTON WITHIN 3 SECONDS. 2 REMOVE THE FACE PLATE (REFER TO PAGE 1). LOWER THE BUTTONHOLE LEVER (C). 3 LOOSEN THE SETSCREW (A) AND MOVE THE BUTTONHOLE LEVER GUIDE (B) UNTIL THE DIS PLAY SHOWS ìSENSOR Lî.

  • Page 39: Adjustment Of Stretch Stitch Feed Balance

    ADJUSTMENT OF STRETCH STITCH FEED BALANCE WHEN THE NUMBER 8 IS SHOWN 5 TIMES WITH THE STRETCH STITCH BALANCE DIAL (C) AT THE SETTING MARK (D), THE MEASUREMENT SHOULD BE BETWEEN 32 AND 38 MM AS SHOWN IN FIG. 1. FIG.

  • Page 40: Adjustment Of Presser Bar Switch Position

    ADJUSTMENT OF PRESSER BAR LIFTER SWITCH POSITION 1 WHILE THE PRESSING THE NEEDLE UP/DOWN AND LOCK STITCH BUTTONS, TURN THE POWER SWITCH ON. PRESS THE NUMBER ì9î BUTTON IN 3 SECONDS. 2 REMOVE THE FACE PLATE AND TOP COVER PLATE. Step3 3 WHEN THE PRESSER BAR IS LIFTED OR LOW- Switch...

  • Page 41: To Adjust The Auto Thread Cutter Switch Position

    TO ADJUST THE AUTO THREAD CUTTER SWITCH POSITION 1 WHILE PRESSING THE NEEDLE UP/DOWN AND LOCK STITCH BUTTONS, TURN THE POWER SWITCH ON. PRESS THE NUMBER ì9î BUTTON WITHIN 3 SECONDS. 2 REMOVE THE MACHINE BASE AND AUTO THREAD CUTTER COVER (REFER TO PAGES 2 AND 3). 3 SET THE NEEDLE BAR AT THE LOWEST POSITION.

  • Page 42: To Adjust Upper Clutch Solenoid

    TO ADJUST UPPER CLUTCH SOLENOID THE CLEARANCE BETWEEN THE SNAP RING E ON THE PLUNGER AND THE YORK SHOULD BE 5 MM. SNAP REMOVE THE BELT COVER. PLUNGER RING E LOOSEN THE SETSCRWS. ADJUST THE YORK SO THAT THE CLEARANCE BETWEEN THE SNAP RING E AND YORK IS 5 MM.

  • Page 43: To Adjust Thread Cutter Solenoid

    TO ADJUST THREAD CUTTER SOLENOID THE CLEARANCE BETWEEN THE PLUNGER AND THE TOP OF YORK SHOULD BE 2.5 MM. 1 REMOVE THE BASE. YORK 2 LOOSEN THE SETSCRWS. ADJUST THE YORK SO THAT THE CLEARANCE BETWEEN THE SNAP RING E AND YORK IS 2.5MM. 3 TIGHTEN THE SETSCREW.

  • Page 44: To Adjust Bobbin Detaining Solenoid

    TO ADJUST BOBBIN DETAINING SOLENOID THE CLEARANCE BETWEEN THE BOBBIN DETAINING SOLENOID AND THE TOP OF YORK SHOULD BE 3 MM. REMOVE THE BASE. LOOSEN THE SETSCRWS. ADJUST THE YORK SO YORK THAT THE CLEARANCE BETWEEN THE SNAP RING E AND YORK IS 3MM. TIGHTEN THE SETSCREW.

  • Page 45: Diagnosis Chart

    DIAGNOSIS CHART NOTE: 1. THIS DIAGNOSIS DEVICE IS PROVIDED FOR THE PURPOSE OF CHECKING THE CIRCUIT BOARDS A AND K AND THE FUNCTIONS OF MC6600P. 2. THE POWER SWITCH MUST BE TURNED OFF WHEN REPLACING PARTS. 3. THE LANGUAGE ON THE LCD IS ENGLISH ONLY. PREPARATION 1.
  • Page 46 1.STEP 1 (FUNCTION OF BUZZER, LCD AND LED) [FAULTY CONDITION] [CORRECT CONDITION] Step1 BUZZER DOES NOT SOUND. 1) BUZZER SOUNDS THE STEP 1 SCREEN DOES NOT 2) LCD AND LED BLINK AT APPEAR. LCD&LED 1 SECOND INTERVAL. LCD AND LED DO NOT BLINK. 3) SEWING LIGHT TURNS ON.
  • Page 47 [CORRECT CONDITION] [FAULTY CONDITION] 4.STEP 4 (PHOTO SENSOR) THE DISPLAY SHOWS [H] OR [L]. THE SCREEN DOES NOT CHANGE. PULL THE BUTTONHOLE LEVER TOWARD YOU-[H] -REMEDY- RELEASE THE BUTTONHOLE ADJUST THE POSITION OF THE LEVER-[L] SHIELD PLATE. PUSH THE BUTTONHOLE LEVER ADJUST THE POSITION OF THE TO THE BACK-[H] PHOTO SENSOR.
  • Page 48 [CORRECT CONDITION] [FAULTY CONDITION] 8. STEP 8 THE DRIVING MECHANISM DOES PRESS A NUMBER (SOLENOID) CORRESPONDING TO THE NOT FUNCTION. Step8 Solenoid SOLENOIDS Sol1 Sol2 Sol3 1) FOR AUTO-THREAD CUTTER –REMEDY– SET THE NEEDLE BAR AT THE LOWEST POSITION. CHECK IF THE CONNECTING PARTS MOVES PROPERLY.
  • Page 49 10. STEP 10 (DRIVING AND BOBBIN WINDING MOTORS) [FAULTY CONDITION ] [CORRECT CONDITION] Step10 THE DISPLAY SHOWS “error”. WHEN THE PRESSER BAR IS Sewing Motor LOWERED AND THE FOOT CONTROL IS DEPRESSED, THE Spool Motor DRIVING MOTOR RUNS. WHEN THE BOBBIN WINDING “REMEDY”...

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