Transformer 1050/1070/1090; Electronic Board 1050/1070/1090 - Husqvarna 1200 Service Manual

Transformer 1050, 1070, 1090
The function of the transformer can be checked with gauge 412 02 56-01.
Electronics boards 1050
The machine has one circuit board and one foil keyboard.
The transformer board is part of the transformer compl.
Electronics boards, 1070, 1090
The machine has 2 different boards and 2 foil keyboards.
The transformer board is part of the transformer compl.
Circuit board 1050, 1070, 1090
The circuit board is on the front side in the arm and contains among other things:
- Components to stabilise the voltage,
- Main motor driving,
- Driving of the step motor of the sewing head,
- Driving of the step motor of the guide,
- LCD-display and its driving,
- Arm shaft sensor,
- Computer, memory,
- Light.
Guide board 1090
The guide board is in the front cover and contains light emitting diodes and a micro chip.
Foil keyboard 1050
The machine has one foil keyboard.
-which is placed in the upper part of the front cover with among other things buttons for
stitch width and stitch length adjustment.
Foil keyboard 1070, 1090
The machine has 2 foil keyboards.
-one of them (elliptically) is placed in the upper part of the front cover with among other
things buttons for stitch width and stitch length adjustment.
-one of them is placed into the right part of the front cover with buttons for decorative
stitches and the sewing advisor.
Main motor 1050, 1070, 1090
The main motor is a 24 volt permanent magnet motor that consumes 60 W at maximum
speed.If the main motor doesn't work when the foot control is pressed, try:
1) New foot control
2) New motor (only connect to circuit board at check)
3) New circuit board
4) New transformer (if the machine doesn't work at all)
SEWKNITWORLD
104 72 30-26 Husqvarna service manual 21