iii
Main frame and Covers ...................................................................................3 - 57
Assembly of Base plate L/R ............................................................................................................3 - 58
Assembly of Rear cover assy ...........................................................................................................3 - 59
Assembly of Face plate assy ............................................................................................................3 - 60
4. Adjustment ..........................................................................................4 - 1
Removal of covers .............................................................................................4 - 2
Needle point damage .........................................................................................4 - 4
Timing belt tension .............................................................................................4 - 5
Motor belt tension ..............................................................................................4 - 6
Needle plate holder assy position ......................................................................4 - 7
Presser foot hole / Needle plate hole position (front/back) ................................4 - 8
Needle swing timing ...........................................................................................4 - 9
Three point needle drop ...................................................................................4 - 10
Needle interference left/right ............................................................................4 - 11
Needle bar rising ..............................................................................................4 - 12
Needle bar height ............................................................................................4 - 14
Needle clearance .............................................................................................4 - 15
Left straight stitch needle drop and
zigzag stitch maximum left needle drop position .............................................4 - 16
Feed dog position (front/back and left/right) ....................................................4 - 18
Feed dog height ...............................................................................................4 - 19
Upper thread tension .......................................................................................4 - 20
Left and right stitch of buttonhole stitch length ................................................4 - 22
Bobbin winder ..................................................................................................4 - 25
Lower thread tension .......................................................................................4 - 26
5. Failure Investigation for Electronic Parts .........................................5 - 1
Sewing lamp does not light ................................................................................5 - 2
Main motor does not turn or Rotation speed is slow ..........................................5 - 3
6. Special Instructions of Wiring ...........................................................6 - 1
Motor 3P supply assy ........................................................................................6 - 2
LED lead wire ....................................................................................................6 - 3
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