Table Of Contents - Janome MC8900 QCP Service Manual

CHANGING EXTERNAL PARTS
Face cover ...........................................................................................................................................1
Top cover .............................................................................................................................................1
Belt cover ............................................................................................................................................2
Machine base ......................................................................................................................................3
Base cover ..........................................................................................................................................3
Bed cover ............................................................................................................................................3
Free arm cover ....................................................................................................................................4
Front cover ..........................................................................................................................................5
Rear cover ...........................................................................................................................................6
REPLACING ELECTRONIC COMPONENTS
Printed circuit board A .........................................................................................................................7
Printed circuit board F .........................................................................................................................8
Switching power supply unit ................................................................................................................9
Driving motor .....................................................................................................................................10
Thread tension unit ...........................................................................................................................11
MECHANICAL ADJUSTMENT
Feed dog height ................................................................................................................................12
Needle drop position .........................................................................................................................13
Presser bar height .............................................................................................................................14
Hook timing .......................................................................................................................................15
Needle bar height ..............................................................................................................................16
Clearance between needle and tip of the rotary hook ................................................................ 17-18
Presser bar lifter switch position .......................................................................................................19
Backlash between hook drive gear and lower shaft gear ..................................................................20
Upper shaft shield plate position .......................................................................................................21
Upper thread tension.........................................................................................................................22
Needle threader plate........................................................................................................................23
Thread drawing lever .........................................................................................................................24
Upper feed dog (1) ............................................................................................................................25
Upper feed dog (2) ............................................................................................................................26
Upper feed dog (3) ...................................................................................................................... 27-28
Buttonhole lever adjustment ..............................................................................................................29
Thread cutter .....................................................................................................................................30
Solenoid position adjustment ............................................................................................................31
Stretch stitch feed balance ................................................................................................................32
Needle plate switch ..................................................................................................................... 33-34
DIAGNOSIS TEST ................................................................................................................................. 35-37
INDEX