CONTENTS
Top cover & face plate attaching and removing .................................................................................... 1
Base & bed cover attaching and removing............................................................................................ 2
Belt cover attaching and removing ........................................................................................................ 3
Front panel attaching and removing ...................................................................................................... 4
To adjust the presser bar height ............................................................................................................ 5
To adjust the needle drop ...................................................................................................................... 6
To adjust the needle bar height ............................................................................................................. 7
To adjust hook timing ............................................................................................................................ 8
To adjust the clearance between the needle and the hook ................................................................... 9
To adjust the backlash of hook drive gear and lower shaft gear ......................................................... 10
To adjust the feed dog height .............................................................................................................. 11
To adjust the upper shaft shield plate position .................................................................................... 12
To adjust the upper thread tension ...................................................................................................... 13
To adjust the stretch feed balance ...................................................................................................... 14
To replace and adjust the threader plate ............................................................................................. 15
To adjust the buttonhole lever ............................................................................................................. 16
Board A attaching and removing ......................................................................................................... 17
Board C attaching and removing ......................................................................................................... 18
Board C and fuse attaching and removing .......................................................................................... 19
DC motor unit attaching and removing................................................................................................ 20
Transformer unit attaching and removing............................................................................................ 21
Machine socket unit attaching and removing ......................................................................................22
Buttonhole lever attaching and removing ............................................................................................ 23
Board K attaching and removing ......................................................................................................... 24
Buttonhole sensor attaching and removing ......................................................................................... 25
Wiring diagram .................................................................................................................................... 26
Multiple language function................................................................................................................... 27
Diagnosis chart (NO.1)........................................................................................................................ 28
Diagnosis chart (NO. 2)....................................................................................................................... 29
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