CONTENTS
WHAT TO DO WHEN ....................................................................................................... 1-3
SERVICE ACCESS
FACE COVER ................................................................................................................ 4
BED COVER .................................................................................................................. 5
FRONT COVER .......................................................................................................... 6-7
REAR COVER ............................................................................................................... 8
MECHANICAL ADJUSTMENT
PRESSER BAR HEIGHT AND ALIGNMENT ................................................................ 9
NEEDLE DROP POSITION ......................................................................................... 10
NEEDLE TO HOOK TIMING........................................................................................ 11
NEEDLE BAR HEIGHT ............................................................................................... 12
CLEARANCE BETWEEN NEEDLE AND HOOK POINT ............................................ 13
BACKLASH (LOWER SHAFT GEAR) ......................................................................... 14
FEED DOG HEIGHT ................................................................................................... 15
NEEDLE SWING TIMING ............................................................................................ 16
NEEDLE THREAD TENSION ...................................................................................... 17
STRETCH STITCH FEED BALANCE ......................................................................... 18
REPLACEMENT AND ADJUSTMENT OF THE NEEDLE THREADER PLATE .......... 19
ADJUSTING BUTTONHOLE LEVER POSITION .............................................................. 20
REPLACING THE ELECTRONIC COMPONENTS ........................................................... 21
SELF DIAGNOSTIC TESTS ......................................................................................... 22-24
REPLACING PRINTED CIRCUIT BOARD A .................................................................... 25
REPLACING PRINTED CIRCUIT BOARD F .................................................................... 26
REPLACING DC MOTOR AND ADJUSTING MOTOR BELT TENSION ........................... 27
REPLACING SWITCHING REGULATOR (UNIT) .............................................................. 28
REPLACING STEPPING MOTOR (ZIGZAG) .................................................................... 29
REPLACING STEPPING MOTOR (FEED) ........................................................................ 30
OILING .............................................................................................................................. 31
PARTS LIST ................................................................................................................. 32-47
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