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
Replacing the Electronic Components
Circuit Board-A Connection ...................................................................................................................16
Self-diagnostic Test ......................................................................................................................... 17-22
Circuit Board-A ......................................................................................................................................23
Driving Motor .........................................................................................................................................24
Switching Regulator Unit .......................................................................................................................25
Adjusting Buttonhole Lever Position ......................................................................................................26
Parts List
....................................................................................................................................... 27-41
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