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CONTENTS
WIRING AND ELECTRONIC CHECK
Wiring diagram
1
General trouble shooting procedure
2
What to do when
3 - 5
Electronic quick check
6 - 7
SERVICE ACCESS
Face cover
8
Top cover
8
Belt cover
9
Base plate
10
Bed cover
10
Front cover
11
Rear cover
12
MECHANICAL ADJUSTMENT
Needle centring
13
Needle bar height
14
Hook and feed timing
15
Clearance
16
Backlash of hook drive gear and lower shaft gear
17
Feed dog height
18
Needle bar swing sensor
19
Upper and lower tension
20
Stretch stitch feed balance
21
Buttonhole
22
Presser bar height and alignment
23
REPLACEMENT
Threader plate
24
C-Board and Fuse
25
Transformer
26
Receptacle
27
A-Board
28
K and F-Board
29
DC Motor
30
Buttonhole
31
Upper shaft sensor
32
Zigzag stepping motor
33
Feed stepping motor
34