1. Manuals
  2. Brands
  3. Janome Manuals
  4. Sewing Machine
  5. 4052lx
  6. Service manual

Janome 4052lx Service Manual

Hide thumbs
Table of Contents

Advertisement

Quick Links

SERVICE MANUAL
4052LX

Advertisement

Table of Contents
loading

Related Manuals for Janome 4052lx

Summary of Contents for Janome 4052lx

  • Page 1 SERVICE MANUAL 4052LX...

  • Page 2: Table Of Contents

    TABLE OF CONTENTS LOCATE AND IDENTIFY THE PARTS ..................1 WHAT TO DO WHEN .......................2 - 4 THREADING OF MACHINE....................5 SERVICE ACCESS FACE COVER ........................6 FREE ARM LEGS COVER.....................6 FRONT COVER........................7 REAR PANEL .........................8 MECHANICAL ADJUSTMENT TOP TENSION ........................9 PRESSER BAR HEIGHT AND ALLIGNMENT ..............10 NEEDLE SWING ........................11 STRAIGHT STITCHING (1) ....................12 NEEDLE DROP (2) ......................13...

  • Page 3: Locate And Identify The Parts

    LOCATE AND IDENTIFY THE PARTS Spool pin Spool holder (Large) Bobbin winder thread guide Stitch length dial Stitch width dial Thread take-up lever Pressure adjusting dial Face cover Pattern indicating window Thread cutter Needle threader Thread tension dial Needle plate Reverse stitch button Hook cover Extension table...

  • Page 4: What To Do When

    WHAT TO DO WHEN CONDITION CAUSE HOW TO FIX REFERENCE 1. SKIPPING 1. NEEDLE IS NOT INSERTED INSERT THE NEEDLE PROPERLY. STITCHES PROPERLY. 2. NEEDLE IS BENT OR WORN. CHANGE THE NEEDLE. 3. INCORRECTLY THREADED RETHREAD. 4. NEEDLE OR THREAD ARE USE THE RECOMMENDED INAPPROPRIATE FOR SEWING NEEDLE AND THREAD.
  • Page 5 CONDITION CAUSE HOW TO FIX REFERENCE 3. BREAKING 1. INITIAL SEWING SPEED IS START WITH MEDIUM SPEED. UPPER TOO FAST. THREAD 2. THREAD PATH IS USE THE PROPER THREAD INCORRECT. PATH. 3. NEEDLE IS BENT OR DULL. REPLACE WITH A NEW NEEDLE. 4.
  • Page 6 CONDITION CAUSE HOW TO FIX REFERENCE 6. NOISY 1. BACKLASH BETWEEN SEE MECHANICAL P.19 OPERATION SHUTTLE HOOK GEAR AND ADJUSTMENT “BACKLASH LOWER SHAFT GEAR IS TOO (LOWER SHAFT GEAR).” GREAT. 2. LOWER SHAFT GEAR IS ELIMINATE THE LOOSENESS. LOOSE. 3. INAPPROPRIATE BELT SEE MECHANICAL P.26 TENSION.

  • Page 7: Threading Of Machine

    THREADING OF MACHINE THE STEP NUMBE CORRESPONDS WITH THE NUMBER IN THE ILLUSTRATIONS. DOTTED LINES SHOW THE PLACES WHERE THE THREAD LOOPS AND IS THEN PULLED TIGHT. RAISE THE TAKE-UP LEVER TO ITS HIGHEST POSITION BY TURNING THE HANDWHEEL TOWARD YOU. RAISE THE PRESSER FOOT LEVER.

  • Page 8: Service Access

    SERVICE ACESS (1) FACE COVER FACE COVER (A) SETSCREW (B) TO REMOVE: REMOVE THE SETSCREW (B) TO TAKE OUT THE FACE COVER (A). TO ATTACH: TO REPLACE, FOLLOW THE ABOVE PROCEDURE IN REVERSE. FREE ARM LEGS COVER SETSCREW (C) FREE ARM LEGS COVER (D) TO REMOVE: 1.

  • Page 9: Front Cover

    SERVICE ACCESS (2) FRONT COVER PATTERN SELECTOR DIAL (K) TO REMOVE: 1. REMOVE THE FACE COVER AND FREE ARM LEGS COVER (SEE PAGE 6.) 2. REMOVE THE PATTERN SELECTOR DIAL (K), AND SETSCREWS (A) - (G) 3. LOOSEN SETSCREW (H). 4.

  • Page 10: Rear Panel

    SERVICE ACCESS (3) REAR PANEL REAR PANEL TO REMOVE: 1. REMOVE THE FACE COVER AND FREE ARM LEGS COVER AND THE FRONT COVER (SEE PAGE 6 &7). 2. REMOVE THE SETSCREWS (A), (B), (C), (D) AND THE REAR COVER. TO ATTACH: TO REPLACE, FOLLOW THE ABOVE PROCEDURE IN REVERSE.

  • Page 11: Mechanical Adjustment

    MECHANICAL ADJUSTMENT TOP TENSION TO CHECK: 1. THE STANDARD UPPER THREAD TENSION SHOULD BE 85 G WHEN PULLING THE THREAD (COTTON THREAD #50) IN THE DIRECTION OF (C) WITH SETTING THE TENSION DIAL AT “4”. (MAKE SURE THE FOOT SHOULD BE LOWERED.) IF THE TENSION IS OUT OF THE STANDARD RANGE, ADJUST IT AS FOLLOWS: * PULLING SPEED FOR THE NEEDLE THREAD IS APPROXIMATELY 59 MM/ SECOND.

  • Page 12: Presser Bar Height And Allignment

    MECHANICAL ADJUSTMENT PRESSER BAR HEIGHT AND ALLIGNMENT TO CHECK: 1. RAISE THE PRESSER FOOT LEVER (B). 2. THE DISTANCE BETWEEN THE PRESSER FOOT (A) AND THE NEEDLE PLATE (C) SHOULD BE 6.0 MM (0.24”). IF THIS IS NOT THE CASE, ADJUST AS FOLLOWS. ADJUSTMENT PROCEDURE: 1.

  • Page 13: Needle Swing

    MECHANICAL ADJUSTMENT NEEDLE SWING TO CHECK: SET THE PATTERN SELECTOR DIAL AT “ “ AND MAXIMUM ZIGZAG WIDTH. IF THE NEEDLE MOVES SIDEWISE WHILE THE NEEDLE IS COMING OUT FROM THE FABRIC, ADJUST IT AS FOLLOWS: (THE NEEDLE SHOULD START SWINGING WHEN ITS TIP IS AT 2 MM (0.08”) TO 3 MM (0.12”) ABOVE THE NEEDLE PLATE IN UPWARD MOTION).

  • Page 14: Straight Stitching (1)

    MECHANICAL ADJUSTMENT STRAIGHT STITCHING (1) SET THE PATTERN SELECTOR DIAL AT “ “, THE STANDARD NEEDLE DROP POSITION SHOULD BE AT THE CENTER OF NEEDLE PLATE HOLE. ADJUSTMENT PROCEDURE: 1. REMOVE THE FACE COVER (SEE PAGE 6). 2. SET THE PATTERN SELECTOR DIAL AT “ “...

  • Page 15: Needle Drop (2)

    MECHANICAL ADJUSTMENT NEEDLE DROP (2) TO CHECK: WHEN THE NEEDLE SWINGS IN MAXIMUM ZIGZAG WIDTH “ “, THE DISTANCE BETWEEN BOTH ENDS OF THE NEEDLE HOLE ON THE NEEDLE PLATE AND THE NEEDLE SHOULD BE 0.2 MM OR MORE. IF NOT, ADJUST AS FOLLOWS: ADJUSTMENT PROCEDURE: 1.

  • Page 16: Stretch Stitch Balance

    MECHANICAL ADJUSTMENT STRETCH STITCH BALANCE ADJUSTMENT PROCESURE: 1. SET THE PATTERN SELECTOR DIAL AT “ “, ZIGZAG WIDTH DIAL AT “0“, AND STITCH LENGTH DIAL AT “S1”. 2. SET THE FEED ADJUSTING KNOB AT “ “. 3. PLACE A PIECE OF PAPER ON THE NEEDLE PLATE. 4.

  • Page 17: Feed Dog Height

    Mechanical Adjustment Feed Dog Height The height of the deed dog should be 0.8-0.9 mm above the needle plate. Adjustment procedure: 1. Select the straight stitch “ “ and set the stitch width control at “0”. 2. Set the foot pressure dial at “3” and lower the foot. 3.

  • Page 18: Needle Bar Height

    Mechanical Adjustment Needle Bar Height When the tip of the hook meets the left side of the needle in ascending travel of the needle from its left and lowest position, the distance between the top of the needle eye and the tip of the hook should be in the range of 1.6-2.0 mm.

  • Page 19: Needle To Shuttle Timing

    Mechanical Adjustment Needle Timing to Hook When the hook point meets with the right side of the needle, the height of needle point from its lowest and left most position should be 3.25-3.55 mm. Adjustment procedure: 1. Select the straight stitch “ “ and set the stitch width control at “6.5”. 2.

  • Page 20: Needle Clearance To Shuttle

    MECHANICAL ADJUSTMENT NEEDLE CLEARANCE TO SHUTTLE THE CLEARANCE BETWEEN THE TEST PIN AND THE TIP OF THE SHUTTLE HOOK SHOULD BE BETWEEN -0.10 MM TO +0.05 MM. TO CHECK: 1. SET THE PATTERN SELECTOR DIAL AT “ “, ZIGZAG WIDTH DIAL AT “ 0 “. 2.

  • Page 21: Backlash (Between Lower Shaft Gear And Shuttle Hook Gear)

    MECHANICAL ADJUSTMENT BACKLASH (BETWEEN LOWER SHAFT GEAR AND SHUTTLE HOOK GEAR) TO CHECK: 1. REMOVE THE NEEDLE PLATE (A) AND BOBBIN HOLDER (B). 2. REMOVE THE FRONT COVER (SEE PAGE 7). 3. LOOSEN SETSCREW (E). 4. TURN THE LOWER SHAFT BUSHING (ECCENTRIC BUSHING) IN DIRECTION (C) WHEN THE PLAY AT THE SHUTTLE HOOK TIP IS TOO LARGE.

  • Page 22: Needle Poisition Misalignment

    MECHANICAL ADJUSTMENT NEEDLE POSITION MISALIGNMENT IF THE NEEDLE BAR MOVES SIDEWISE (ZIGZAG) WHEN THE PATTERN “ “ IS SELECTED AND THE ZIGZAG WIDTH IS SET AT “ 0 “, ADJUST AS FOLLOWS: ADJUSTMENT PROCEDURE: 1. SET THE PATTERN SELECTOR DIAL AT “ “, ZIGZAG WIDTH DIAL AT “...

  • Page 23: Zero Feeding

    MECHANICAL ADJUSTMENT ZERO FEEDING ADJUSTMENT PROCEDURE: 1. SET THE PATTERN SELECTOR DIAL AT “ “, AND THE STITCH LENGTH DIAL AT “ 0 “. 2. PLACE A PIECE OF PAPER ON THE NEEDLE PLATE. TURN THE HANDWHEEL TOWARD YOU SLOWLY BY HAND AND CHECK THE MOVEMENT OF A PAPER.

  • Page 24: Buttonhole Stitch Balance

    MECHANICAL ADJUSTMENT BUTTONHOLE STITCH BALANCE TO CHECK: SEW THE BUTTONHOLE, AND CHECK THE BALANCE OF STITCH DENSITY BETWEEN THE RIGHT AND LEFT SIDES OF BUTTONHOLE, THE STANDARD STITCH DENSITY OF THE RIGHT AND LEFT SIDES OF BUTTONHOLE IS 10 STITCHES OF RIGHT SIDE (FORWARD) AGAINST 9 - 12 STITCHES OF LEFT SIDE (BACKWARD).

  • Page 25: Zero Feeding Of Buttonhole Bartack

    MECHANICAL ADJUSTMENT ZERO FEEDING IF THE FABRIC MOVES BACKWARD OR FOREWARD AT THE BARTACK SEWING, ADJUST THE ZERO FEEDING OF THE BUTTONHOLE STITCH AS FOLLOWS; ADJUSTMENT PROCEDURE: 1. SEW A BUTTONHOLE AND CHECK THE STITCHES. 2. REMOVE THE PATTERN SELECTOR DIAL. 3.

  • Page 26: Buttonhole Function

    MECHANICAL ADJUSTMENT BUTTONHOLE FUNCTION (1) THE STANDARD BUTTONHOLE SIZE IS 3 MM (0.12”) LONGER THAN THE ACTUAL BUTTON SIZE WHEN SEWING WITH THE AUTOMATIC BUTTONHOLE FOOT. ADJUSTED AS FOLLOWS: ADJUSTMENT PROCEDURE: 1. ATTACH THE BUTTONHOLE FOOT (R). 2. PULL DOWN THE BH LEVER. TURN THE ADJUSTING SCREW UNTIL THE BH LEVER KNOB SLIGHTLY TOUCHES THE END OF THE STOPPER.

  • Page 27: Replacement And Adjustment Of Needle Threader Plate

    MECHANICAL ADJUSTMENT REPLACEMENT AND ADJUSTMENT OF NEEDLE THREADER PLATE IF THE NEEDLE THREADER IS DAMAGED, REPLACE IT OR ADJUST AS FOLLOWS TO REPLACE THE NEEDLE THREADER COVER: 1. PULL OUT THE THREADER COVER (DRAWING. 1). 2. TO ATTACH THE THREADER COVER, MATCH THE GROOVE TO THE PIN (B) AND INSERT THE THREADER COVER (C).

  • Page 28: Motor Belt Tension

    MECHANICAL ADJUSTMENT MOTOR BELT TENSION TO CHECK: 1. IF THE MOTOR BELT TENSION IS TOO TIGHT OR TOO LOOSE, IT MAY CAUSE BELT NOISE. ALSO, A TOO TIGHT BELT TENSION CAN CAUSE THE MACHINE TO RUN SLOWLY AND WILL OVERLOAD THE MOTOR.

  • Page 29: Wiring Of Terminal Block

    WIRING OF TERMINAL BLOCK RIDGE RIDGE FROM MOTOR FROM LAMP SOCKET...

  • Page 30: Oiling

    OILING FACTORY LUBRICATED PARTS WILL PROVIDE YEARS OF HOUSEHOLD SEWING WITHOUT ROUTINE OILING, BUT YOU SHOULD STILL CHECK FOR POSSIBLE LUBRICATION NEEDS WHENEVER SEEVICING MACHINES. OIL: USE GOOD QUALITY SEWING MACHINE OIL AT THE POINTS (A,B,C,D,E,F,G & H) INDICATED BY THE BLACK ARROWS.

Table of Contents