Janome S-7330 User manual

SERVICE MANUAL
MODEL: S-7330

WHAT TO DO WHEN ................................................................................................. 1-3
SERVICE ACCESS (1) FACE COVER, TOP COVER ................................................... 4
SERVICE ACCESS (2) BASE, BED COVER ................................................................ 5
SERVICE ACCESS (3) BELT COVER........................................................................... 6
SERVICE ACCESS (4) FRONT COVER....................................................................... 7
SERVICE ACCESS (5) REAR COVER ......................................................................... 8
MECHANICAL ADJUSTMENT
PRESSER BAR HEIGHT AND ALIGNMENT................................................................ 9
NEEDLE DROP POSITION......................................................................................... 10
NEEDLE TO SHUTTLE TIMING.................................................................................. 11
NEEDLE BAR HEIGHT ............................................................................................... 12
NEEDLE CLEARANCE TO SHUTTLE ........................................................................ 13
BACKLASH (BETWEEN LOWER SHAFT GEAR AND SHUTTLE HOOK GEAR) ..... 14
FEED DOG HEIGHT ................................................................................................... 15
ZIGZAG SYNCHRONIZATION .................................................................................... 16
NEEDLE THREAD TENSION...................................................................................... 17
STRETCH STITCH FEED BALANCE ......................................................................... 18
REPLACEMENT AND ADJUSTMENT OF THE NEEDLE THREADER PLATE.......... 19
CONNECTOR DIAGRAM............................................................................................ 20
SELF DIAGNOSTIC TESTS........................................................................................ 21
SELF DIAGNOSTIC SHEET ..................................................................................22-25
REPLACING PRINTED CIRCUIT BOARD A .............................................................. 26
REPLACING SLIDE VOLUME AND PRINTED CIRCUIT BOARD F........................... 27
REPLACING DC MOTOR AND ADJUSTING MOTOR BELT TENSION ..................... 28
REPLACING THE FUSES........................................................................................... 29
REPLACING MACHINE SOCKET (UNIT)................................................................... 30
REPLACING THE TRANSFORMER ........................................................................... 31
REPLACING THE ZIGZAG WIDTH MOTOR............................................................... 32
REPLACING THE FEED STITCH MOTOR ................................................................. 33
ADJUSTING BUTTONHOLE LEVER POSITION........................................................ 34
ADJUSTING THE BOBBIN WINDER SWITCH........................................................... 35
OILING ........................................................................................................................ 36
PARTS LIST ........................................................................................................... 37-54
TABLE OF CONTENTS

9
When the presser foot is raised, the clearance between the presser foot and the needle plate should be 6.0 mm.
When the presser foot is lowered, the edge of the foot and the feed dog window on the needle plate should be
parallel.
1. Remove the face cover and raise the presser foot.
Loosen the setscrew to adjust the presser foot height (6.0 mm) and the presser foot alignment.
2. Tighten the setscrew firmly.
3. Install the face cover.
Presser bar lifter
Setscrew 4x8
Presser foot
6.0 mm
Needle plate
[Height of presser foot]
[Presser foot alignment]
Should be parallel
Feed dog
MECHANICAL ADJUSTMENT
PRESSER BAR HEIGHT AND ALIGNMENT

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