Replacing the External Parts
Face plate .................................................................................................... 1
Top Cover .....................................................................................................1
Belt Cover ....................................................................................................1
Motor Cover .................................................................................................1
Base ............................................................................................................. 1
Mechanical Adjustment
Needle Bar Height ........................................................................................2
Presser Bar Height ....................................................................................... 2
Feed Dog Height ..........................................................................................3
Feed Dog Alignment ....................................................................................3
Feed Cam Timing ......................................................................................... 4
Feed Lifting Cam Timing ..............................................................................5
Needle to Hook Timing ................................................................................. 6
Clearance between Needle and Hook Point ................................................6
Hook Stopper Position .................................................................................7
Bobbin Winder Stopper ................................................................................8
Check Spring Stroke .................................................................................... 9
Pretension Dial .............................................................................................9
Knee Lifter Lever ........................................................................................ 10
Needle Stop Position .................................................................................. 11
Needle Threader (1600P only) ................................................................... 12
Replacing the Electronic Components
Location of the Electronic Components .....................................................13
Location of the Connectors ........................................................................14
Internal Wiring ............................................................................................ 15
Circuit Board-A ........................................................................................... 16
Circuit Board-F and Slide Volume .............................................................. 16
Driving Motor ........................................................................................ 17-18
Power Transformer ..................................................................................... 19
Machine Socket .......................................................................................... 19
Light Bulb ................................................................................................... 20
Adjustment of the Thread Cutter Mechanism
(1600P and 1600-DBX only)
Static Cutter Blade ..................................................................................... 21
Thread Cutter Blade................................................................................... 22
Thread Guide Plate .................................................................................... 23
Needle to Cutter Cam Timing.....................................................................24
Thread Drawing Lever ................................................................................ 25
Auto Tension Release ................................................................................ 26
Thread Cutter Troubleshooting ................................................................... 27
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