2
LOCATE AND IDENTIFY PARTS ..................................................................................................3
WIND THE BOBBIN ......................................................................................................................4
PREPARE YOUR TOP THREAD ...................................................................................................5
LCD DISPLAY ...............................................................................................................................6
WHAT TO DO WHEN ................................................................................................................ 7-9
CHANGING EXTERNAL PARTS
FACE COVER..............................................................................................................................10
FREE-ARM COVER ...................................................................................................................11
FRONT COVER .................................................................................................................... 12-13
REAR COVER .............................................................................................................................14
MECHANICAL ADJUSTMENT
PRESSER BAR HEIGHT ............................................................................................................15
NEEDLE DROP POSITION ........................................................................................................16
ADJUSTMENT OF HOOK TIMING .............................................................................................17
REPLACING HOOK ....................................................................................................................18
ADJUSTMENT OF NEEDLE BAR HEIGHT ................................................................................19
CLEARANCE BETWEEN NEEDLE AND TIP OF HOOK ROTARY ............................................20
FEED DOG HEIGHT ...................................................................................................................21
TOP TENSION ............................................................................................................................22
REPLACING THE ELECTRONIC COMPONENTS
CIRCUIT BOARD-A CONNECTION ...........................................................................................23
SELF-DIAGNOSTIC TEST .................................................................................................... 24-28
CIRCUIT BOARD-A .............................................................................................................. 29-30
DRIVING MOTOR .......................................................................................................................31
SWITCHING REGULATOR UNIT ................................................................................................32
ADJUSTING BUTTONHOLE LEVER POSITION ........................................................................33
PARTS LIST .......................................................................................................................... 34-47
INDEX
