Circuit Board - Circuit Diagram Sapphire 850/830 - Husqvarna Saphire Series Service Manual

Circuit board - Circuit diagram Sapphire 850/830

FOR SAFTEY REASONS ALWAYS DISCONNECT THE POWER CORD FROM THE MACHI-
NE BEFORE REMOVING THE CIRCUIT BOARD AND MAKE SURE TO USE WRIST BAND
AND ESD MAT.
ATTENTION!
It is of the utmost importance that precautions are being taken in order to avoid damage of the electronics
by electro static discharges (ESD). To avoid these errors it is important to handle circuit boards in a control-
led way.
Dismantling
1. Remove rear covers.
2. Remove front cover.
3. Disconnect the cables from the circuit board according to below:
(1) Left foil key board.
(2) Right foil key board.
(3) The sewing head.
(4) The step motor of the feeding unit.
(5) Bobbin winder.
(6) Power supply.
(7) Synchronizer card.
(8) Motor.
4. Remove the 3 screws (A) holding the circuit board.
5. Lift away the PC-board from the machine, and ALWAYS hold the PC board by the edges.
6. Place the PC-board in a ESD Bag.
Note! If the Main PC board is changed the sewing heads pivot position must be set
44
Dismantling and mounting
104 72 79-26
A
1
5
3
4
8
A
2
7
6