INDEX
What to do when .................................................................................................................................. 1-3
Changing External Parts
Face Cover ............................................................................................................................................. 4
Free arm Cover ..................................................................................................................................... 5
Front Cover .......................................................................................................................................... 6-7
Rear Cover ............................................................................................................................................. 8
Mechanical Adjustment
Presser Bar Height ................................................................................................................................. 9
Needle Drop Position ............................................................................................................................ 10
Adjustment of Hook Timing ....................................................................................................................11
Adjustment of Needle Bar Height ......................................................................................................... 12
Clearance between Needle and Tip of Rotary Hook ............................................................................ 13
Feed Dog Height .................................................................................................................................. 14
Top Tension .......................................................................................................................................... 15
Stretch Stitch Feed Balance ................................................................................................................. 16
Replacing the Electronic Components
Circuit Board-A Connection .................................................................................................................. 17
Self-diagnostic Test ......................................................................................................................... 18-23
Circuit Board-A ..................................................................................................................................... 24
Driving Motor ........................................................................................................................................ 25
Switching Regulator Unit ...................................................................................................................... 26
Adjusting Buttonhole Lever Position ..................................................................................................... 27
