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TABLE OF CONTENTS
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
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