WHAT TO DO WHEN
.......................................................................................................................1 to 3
CHANGING EXTERNAL PARTS
FACE COVER .........................................................................................................................................4
FREE-ARM COVER ................................................................................................................................5
FRONT COVER ......................................................................................................................................6
REAR COVER .........................................................................................................................................7
MECHANICAL ADJUSTMENT
PRESSER BAR HEIGHT ........................................................................................................................8
NEEDLE DROP POSITION .....................................................................................................................9
ADJUSTMENT OF HOOK TIMING .......................................................................................................10
ADJUSTMENT OF NEEDLE BAR HEIGHT ..........................................................................................11
CLEARANCE BETWEEN NEEDLE AND TIP OF THE ROTARY HOOK ..............................................12
FEED DOG HEIGHT .............................................................................................................................13
FEED DOG ADJUSTMENT ...................................................................................................................14
TOP TENSION ......................................................................................................................................15
STRETCH STITCH FEED BALANCE ...................................................................................................16
REPLACEMENT AND ADJUSTMENT OF THE NEEDLE THREAD PLATE .........................................17
ADJUSTING BUTTONHOLE LEVER POSITION ..................................................................................18
THREAD CUTTER ................................................................................................................................19
SELF-DIAGNOSTIC TEST
SELF-DIAGNOSTIC TEST ...........................................................................................................20 to 25
TO DISPLAY THE VERSION OF THE PROGRAM ...............................................................................25
REPLACING THE ELECTRONIC COMPONENTS
PRINTED CIRCUIT BOARD A CONNECTION .....................................................................................26
PRINTED CIRCUIT BOARD A ..............................................................................................................27
PRINTED CIRCUIT BOARD F2 ............................................................................................................28
PRINTED CIRCUIT BOARD F ..............................................................................................................29
PRINTED CIRCUIT BOARD L...............................................................................................................30
DRIVING MOTOR (DC MOTOR) ..........................................................................................................31
SWITCHING REGULATOR UNIT ..........................................................................................................32
CLEANING AREA OF THREAD CUTTER AND LOWER SHAFT GEAR
............................................33
PARTS LIST
.................................................................................................................................34 to 47
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