Janome NH15 Service Manual & Parts List
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Janome NH15 Service Manual & Parts List

Janome NH15 Service Manual & Parts List

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SERVICE MANUAL
&
PARTS LIST
MODEL: NH15
1

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  • Page 1 SERVICE MANUAL & PARTS LIST MODEL: NH15...

  • Page 2: Table Of Contents

    CONTENTS WHAT TO DO WHEN ..................3-5 SERVICE ACCESS FACE COVER ....................6 TOP COVER ....................6 BASE COVER ....................7 REAR COVER ....................8 FRONT COVER .................... 9 MECHANICAL ADJUSTMENT NEEDLE THREAD TENSION ..............10 BOBBIN TENSION ..................11 PRESSER BAR HEIGHT AND ALIGNMENT ..........

  • Page 3: 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 THE SEWING NEEDLE AND THREAD.
  • Page 4 WHAT TO DO WHEN 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.
  • Page 5 WHAT TO DO WHEN CONDITION CAUSE HOW TO FIX REFERENCE 6. NOISY 1. BACKLASH BETWEEN SEE MECHANICAL P.16 OPERATION SHUTTLE HOOK GEAR AND ADJUSTMENT “CLEARANCE LOWER SHAFT GEAR IS TOO BETWEEN NEEDLE AND GREAT. SHUTTLE (NO.2)”. 2. LOWER SHAFT GEAR IS ELIMINATE THE LOOSENESS.

  • Page 6: Service Access

    SERVICE ACCESS FACE COVER TO REMOVE: 1. REMOVE THE FACE COVER BY REMOVING THE CAP (A) AND SETSCREW (B). TO ATTACH: 2. FOLLOW THE ABOVE PROCEDURE IN REVERSE. FACE COVER SETSCREW(B) CAP(A) TOP COVER TO REMOVE: 1. REMOVE THE SETSCREWS (C). 2.

  • Page 7: Base Cover

    SERVICE ACCESS BASE COVER TO REMOVE: 1. LOOSEN THE SETSCREWS (A). 2. REMOVE THE BASE PLATE. TO ATTACH: 3. MOUNT THE BASE PLATE AND SECURE IT WITH SETSCREWS. BASE COVER...

  • Page 8: Rear Cover

    SERVICE ACCESS REAR COVER TO REMOVE: 1. REMOVE THE FACE COVER AND SETSCREW (A) (SEE PAGE 4). 2. OPEN THE SHUTTLE COVER AND REMOVE THE SETSCREWS (B), (C) AND (D). 3. REMOVE THE CAPS AND SETSCREWS (E), (F), (G), 4. REMOVE THE SETSCREWS (H) AND (I). 5.

  • Page 9: Front Cover

    SERVICE ACCESS FRONT COVER TO REMOVE: 1. REMOVE THE FACE COVER AND TOP COVER (SEE PAGE 4 AND 5). 2. LOOSEN THE SETSCREW (A). 3. REMOVE THE SETSCREW (B), REMOVE THE REAR COVER (SEE PAGE 6). LOOSEN THE SETSCREW (C), (E) AND (H). REMOVE THE SETSCREW (D). 4.

  • Page 10: Mechanical Adjustment

    MECHANICAL ADJUSTMENT TOP TENSION THE TOP TENSION SHOULD BE BETWEEN 65 AND 95G WHEN PULLING THE THREAD UP IN THE DIRECTION OF C. * USE POLYESTER SEWING THREAD #50 (WHITE). * IF IT IS NOT WITHIN THE ABOVE LIMIT, ADJUST AS FOLLOWS. 1.

  • Page 11: Bobbin Tension

    MECHANICAL ADJUSTMENT BOBBIN TENSION TO CHECK: SET THE BOBBIN IN THE BOBBIN CASE AND PASS THE THREAD (COTTON #50) THROUGH THE TENSION SPRING. THE BOBBIN THREAD TENSION SHOULD BE 45–55g WHEN PULLING THE THREAD IN THE DIRECTION OF (B). IF THE TENSION IS OUT OF THE RANGE, ADJUST IT AS FOLLOWS: ADJUSTMENT PROCEDURE: 1.

  • Page 12: Presser Bar Height And Alignment

    MECHANICAL ADJUSTMENT PRESSER BAR HEIGHT AND ALIGNMENT TO CHECK: 1. RAISE THE PRESSER FOOT LIFTER (A). 2. THE DISTANCE BETWEEN THE PRESSER FOOT (D) AND THE NEEDLE PLATE (E) SHOULD BE 6.0 MM (0.24˝). ADJUSTMENT PROCEDURE: 1. REMOVE THE FACE COVER (SEE PAGE 6). 2.

  • Page 13: Needle Swing

    MECHANICAL ADJUSTMENT NEEDLE SWING TO CHECK: ADJUST THE NEEDLE SWING ACCORDING TO THE FOLLOWING PROCEDURE, IF THE NEEDLE BAR STARTS MOVING SIDEWAYS WHILE THE NEEDLE IS IN THE FABRIC AT SEWING THE ZIGZAG PATTERN (WITH MAXIMUM ZIGZAG WIDTH). ADJUSTMENT PROCEDURE: 1.

  • Page 14: Needle Drop Position

    MECHANICAL ADJUSTMENT NEEDLE DROP POSITION 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 drop poSitionS Should BE Equal. if not, adjuSt aS followS: ADJUSTMENT PROCEDURE: 1.

  • Page 15: Clearance Between Needle And Shuttle

    MECHANICAL ADJUSTMENT CLEARANCE BETWEEN NEEDLE AND SHUTTLE (ADJUSTMENT METHOD NO. 1) TO CHECk: thE clEarancE BEtwEEn thE nEEdlE and ShuttlE racE Should BE –0.05 to +0.10 mm. if not, adjuSt aS followS: ADJUSTMENT PROCEDURE: 1. rEmovE thE facE covEr (SEE pagE 6). 2.
  • Page 16 MECHANICAL ADJUSTMENT CLEARANCE BETWEEN NEEDLE AND SHUTTLE (ADJUSTMENT METHOD NO.2) TO CHECk: uSE thiS adjuStmEnt mEthod no. 2 if thE clEarancE cannot BE adjuStEd BY mEthod no.1. thE clEarancE BEtwEEn thE nEEdlE and ShuttlE racE Should BE –0.05 to +0.10 mm. ADJUSTMENT PROCEDURE: 1.

  • Page 17: Feed Dog Height

    MECHANICAL ADJUSTMENT FEED DOG HEIGHT TO CHECk: 1. lowEr thE prESSEr foot. 2. turn thE handwhEEl toward You until thE nEEdlE Bar comES to thE fEEd dog aBovE thE nEEdlE platE Should BE 0.75–0.90 mm. if it iS not in thE rangE, adjuSt aS followS. ADJUSTMENT PROCEDURE: 1.

  • Page 18: Needle Bar Height

    MECHANICAL ADJUSTMENT NEEDLE BAR HEIGHT TO CHECk: whEn thE tip of ShuttlE 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 ShuttlE hook Should BE in thE rangE of 2.9-3.5 mm. ADJUSTMENT PROCEDURE: 1.

  • Page 19: Needle Timing To Shuttle

    MECHANICAL ADJUSTMENT NEEDLE TIMING TO SHUTTLE TO CHECk: thE hEight of thE nEEdlE point from itS lowESt point of travEl Should BE in thE rangE of 1.45-1.95 mm whEn thE tip of thE ShuttlE hook juSt mEEtS thE lEft SidE of thE nEEdlE at thE lEft nEEdlE poSition. ADJUSTMENT PROCEDURE: 1.

  • Page 20: Buttonhole Feed Balance

    MECHANICAL ADJUSTMENT BUTTONHOLE FEED BALANCE TO CHECk: whEn SEwing ButtonholE, thE StitchES on Each SidE of ButtonholE Should BE thE SamE Stitch dEnSitY. thE rangE of 9-12 StitchES in thE right SidE row (Backward fEEding) againSt 10 StitchES in thE lEft SidE row (forward fEEding) iS conSidErEd accEptaBlE.

  • Page 21: Disengagement Of Cam Follower

    MECHANICAL ADJUSTMENT DISENGAGEMENT OF CAM FOLLOWER TO CHECk: too narrow clEarancE BEtwEEn thE cam followEr and thE top convEx of zigzag cam maY oftEn cauSE difficultY in turning of thE pattErn SElEctor dial, thiS can alSo cauSE unintEndEd pattErnS to BEcomE SElEctEd or makE zigzag Stitch in Straight Stitch SEtting.

  • Page 22: Motor Belt Tension

    MECHANICAL ADJUSTMENT MOTOR BELT TENSION TO CHECk: 1. impropEr BElt tEnSion maY cauSE noiSE, ovErload of motor, Slow running or motor BElt jumping. 2. thE BElt dEflEction Should BE 7 mm - 9 mm whEn prESSing thE middlE of thE motor BElt with approximatElY 300 gramS of prESSurE. ADJUSTMENT PROCEDURE: rEmovE thE front and rEar covEr (SEE pagE 8, 9).

  • Page 23: Wiring

    WIRING 1. wiring for machinE SockEt unit. 120v 240v m: motor l: lamp...

  • Page 24: Parts List

    MODEL: NH15 PARTS LIST...
  • Page 25 MODEL: NH15 PARTS LIST PARTS DESCRIPTION 310613909 Rear cover (unit) 310048701 Rear cover 310049001 Cover fixing plate 000120203 Tapping screw 3x8 (B) 810220003 Setscrew 000115205 Setscrew TP4x6 000081005 Setscrew 4x8 000198305 Setscrew 4x10 (B) 000080901 Setscrew 4x25 000114709 Setscrew TP3x6...
  • Page 26 MODEL: NH15 PARTS LIST...
  • Page 27 MODEL: NH15 PARTS LIST PARTS DESCRIPTION 305604200 Presser bar base plate (unit) 735221008 Presser bar base plate 735222009 Needle position set plate 000101404 Setscrew 4x6 000070506 Washer 000138307 Bolt 4x8 303017101 Presser bar 735027002 Presser bar spring 735028003 Presser bar bracket...
  • Page 28 MODEL: NH15 PARTS LIST...
  • Page 29 MODEL: NH15 PARTS LIST PARTS DESCRIPTION 740007013 Face plate set plate 000081005 Setscrew 4x8 730024004 Needle bar supportaer spring 000101404 Setscrew 4x6 647513015 Lamp socket (unit) 000009803 Lamp 120V, 15W 000053008 Cord tie band 301611105 Needle bar supporter (unit) 301032106...
  • Page 30 MODEL: NH15 PARTS LIST...
  • Page 31 MODEL: NH15 PARTS LIST PARTS DESCRIPTION 310602008 Upper shaft (unit) 102073003 Setscrew 000036717 Thrust washer 732025001 Upper shaft front bushing 639095000 Ring 000111304 Hexagonal socket screw 5x5 749011109 Worm 000111201 Hexagonal socket screw 4x4 761052007 Setscrew 731312005 Felt 304609006 Crank rod (unit)
  • Page 32 MODEL: NH15 PARTS LIST...
  • Page 33 MODEL: NH15 PARTS LIST PARTS DESCRIPTION 310601007 Bobbin winder support plate (unit) 310001001 Bobbin winder support plate 310501006 Bobbin winder arm (unit) 310003003 Clutch opener plate 000120203 Setscrew 3x8 (B) 000001609 Snap ring E-5 505071002 Bobbin winder arm spring 000081005...
  • Page 34 MODEL: NH15 PARTS LIST...
  • Page 35 MODEL: NH15 PARTS LIST PARTS DESCRIPTION 744004001 Needle plate 681009101 Setscrew 735950003 Lower shaft gear (unit) 000110107 Hexagonal socket screw 5x5WP 000036201 Washer 8-0.5 735233003 Bushing 735061008 Feed lifting cam 000111304 Hexagonal socket screw 5x5 735236006 Lower shaft 822070003 Felt (1)
  • Page 36 MODEL: NH15 PARTS LIST...
  • Page 37 MODEL: NH15 PARTS LIST PARTS DESCRIPTION 735612000 Feed rock shaft (unit) 735078008 Feed rock shaft 735079009 Feed bar 735080003 Feed bar shaft 000002507 Snap ring E-4 000111201 Hexagonal socket screw 4x4 735081004 Feed dog 735082005 Setscrew 735083006 Feed bar spring...
  • Page 38 MODEL: NH15 PARTS LIST...
  • Page 39 MODEL: NH15 PARTS LIST PARTS DESCRIPTION 743612005 Motor (unit) 014170108 Motor 000115504 Setscrew TP5x10 739505403 Machine socket (unit) 000060802 739037007 Machine socket cover 000107802 Setscrew 3x10 (B) 000103509 Setscrew 4x10 650166008 Timing belt...
  • Page 40 MODEL: NH15 PARTS LIST...
  • Page 41 MODEL: NH15 PARTS LIST PARTS DESCRIPTION 310870009 Accessory set 647803004 Screwdriver (small) 102261000 Bobbin 647808009 Seam ripper (unit) 639804000 Needle set (unit) 735801008 Darning plate 611413002 Buttonhole foot (unit) 611406002 Zipper foot (unit) 611411000 Blind foot (unit) C-1028 Foot control...

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