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CAUTION
When Removing the Upper Cover:
• Always shut OFF power when removing the upper cover or changing the input
frequency.
2. Unscrew the screw of the oscillator circuit board of the PC7501 and replace it (see Figure 3.2).
Figure 3.2 Replacing oscillator circuit boards
3. Reinstall the upper cover once removed and secure the four screws of the PC7501.
Attach another oscillator circuit board to the connector.
Secure the oscillator circuit board with the screw.
Unscrew the screw securing the oscillator circuit board.
Lift off the oscillator circuit board.
Position of the oscillator circuit board of the PC7501