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2. Replace the oscillator circuit board (see Figure 3.2).
Figure 3.2 Replacing the oscillator circuit board
3. Reinstall the upper cover and secure the four screws.
Note on Replacing the Oscillator Circuit Board:
• Always shut OFF power when removing the upper cover or replacing oscillator
circuit board. Otherwise, internal circuits may be damaged.
The oscillator circuit board of the PC7501 is in the lower right
corner of the board.
Oscillator circuit board
Unscrew the screw securing the oscillator circuit board.
Lift off the oscillator circuit board.
Attach another oscillator circuit board to the connector.
Secure the new oscillator circuit board with the screw.
CAUTION
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