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2-6. Replacing the Printed Wiring Board
2-6-2. Replacing the SW-963 board
1. 2. 3. 4. Pull out the knob. Disconnect the flexible card wire from CN2 on the VA-186 board referring to Section 2-5-1. Remove the CN-1651 board referring to Section 2-6-1. Remove the two screws securing the VA-186 board and remove the board in the direction of the arrow.
Frexible card wire
CN2 B2.6 x 5 VA-186 board
Knob
5. Remove the two screws to remove the board bracket from the SW-963 board. 6. Desolder CN1 on the SW-963 board and remove the SW-963 board from the VA-186 board.
Board bracket
B A SW-963 board
VA-186 board CN1
B2.6 x 5
7. Attach the board bracket that were removed in step 5 to a new SW-963 board with the two screws. 8. Solder CN1 on SW-963 board. The following precautions should be taken before soldering: . Make sure that the SW-963 board is normal to theVA-168 board. . Make sure that the screw holes A and B for the VA-186 board and board bracket are aligned. 9. Install the VA-186 and CN-1651 boards in the reverse order of steps 1 to 4.
