CONTENTS
LOCATE AND IDENTIFY THE PARTS...............................................................................................................1
WINDING THE BOBBIN ....................................................................................................................................2
THREADING THE MACHINE ............................................................................................................................3
CONNECTOR DIAGRAM ..................................................................................................................................4
GENERAL TROUBLE SHOOTING PROCEDURE ............................................................................................5
WHAT TO DO WHEN ......................................................................................................................................6-8
SELF-DIAGNOSTIC TESTS .........................................................................................................................9-11
SERVICE ACCESS
FACE COVER ...................................................................................................................................12
TOP COVER .....................................................................................................................................12
BELT COVER....................................................................................................................................13
BASE PLATE ....................................................................................................................................14
BED COVER .....................................................................................................................................14
FRONT COVER ................................................................................................................................15
REAR COVER ..................................................................................................................................16
FREE ARM COVER..........................................................................................................................17
MECHANICAL ADJUSTMENT
NEEDLE DROP POSITION ..............................................................................................................18
NEEDLE BAR HEIGHT ....................................................................................................................19
NEEDLE TO HOOK TIMING.............................................................................................................20
CLEARANCE BETWEEN NEEDLE AND HOOK ............................................................................. 21
BACKLASH (BETWEEN LOWER SHAFT GEAR AND HOOK GEAR) .................................................... 22
FEED DOG HEIGHT ........................................................................................................................23
ZIGZAG SYNCHRONIZATION ......................................................................................................... 24
TENSION RELEASE MECHANISM .................................................................................................25
STRETCH STITCH FEED BALANCE ADJUSTMENT ..................................................................... 26
NEEDLE THREAD TENSION ...........................................................................................................27
BUTTONHOLE LEVER.....................................................................................................................28
PRESSER FOOT HEIGHT AND ALIGNMENT ................................................................................ 29
PART REMOVAL AND REPLACEMENT
NEEDLE THREAD TENSION UNIT .................................................................................................30
THREADER PLATE ..........................................................................................................................31
REPLACING THE PRINTED CIRCUIT BOARD “A”..............................................................................................32
REPLACING THE PRINTED CIRCUIT BOARD “F” ..............................................................................................33
REPLACING SLIDE VOLUME ..............................................................................................................................34
REPLACING DC MOTOR AND ADJUSTING MOTOR BELT TENSION............................................................... 35
REPLACING THE FUSES ....................................................................................................................................36
REPLACING MACHINE SOCKET (UNIT) ............................................................................................................37
REPLACING TRANSFORMER .............................................................................................................................38
REPLACING THE ZIGZAG WIDTH MOTOR ........................................................................................................ 39
REPLACING THE FEED STITCH MOTOR ...........................................................................................................40
ADJUSTING THE BOBBIN WINDER SWITCH .................................................................................................... 41
OILING
..........................................................................................................................................................42
.................................43-61
PARTS LIST ...................................................................................................................
Содержание DC5100
Страница 1: ...SERVICE MANUAL PARTS LIST DC5100...
