Table Of Contents - Janome JP720 Servicing Manual

INDEX
What to do when ................................................................................................................................................................ １-３
Changing External Parts
Face Cover................................................................................................................................................................................. ４
Bed Cover ................................................................................................................................................................................ ５
Front Cover ............................................................................................................................................................................６-７
RearF Cover .............................................................................................................................................................................. ８
Mechanical Adjustment
Presser Bar Height.................................................................................................................................................................. ９
Needle Drop Position .......................................................................................................................................................... １０
Needle Bar Height ................................................................................................................................................................ １１
Needle to Hook Timing ....................................................................................................................................................... １２
Clearance between Needle and Hook Point............................................................................................................... １３
Backlash ( Lower Shaft Gear )......................................................................................................................................... １４
Feed Dog Height................................................................................................................................................................... １５
Needle Swing Timming....................................................................................................................................................... １６
Top Tension............................................................................................................................................................................ １７
Stretch Stitch Feed Balance ............................................................................................................................................. １８
Thread Plate ........................................................................................................................................................................... １９
Replacing the Electronic Components
Location of the Connectors ............................................................................................................................................. ２０
Diagnosis chart............................................................................................................................................................... ２１-２３
Circuit Board-A ...................................................................................................................................................................... ２４
Circuit Board-F....................................................................................................................................................................... ２５
Driving Motor .......................................................................................................................................................................... ２６
Switching regulator Motor.................................................................................................................................................. ２７
Stepping motor ( Zigzag ) ................................................................................................................................................... 28
Stepping motor ( Feed ) ...................................................................................................................................................... 29
Buttonhole lever guide ......................................................................................................................................................... 30
Oiling ........................................................................................................................................................................................... 31