14: Maintenance
PRC1099A-MS 14-9
6. Remove the four mounting screws at the corners and the center
mounting screw, and then carefully lift the Audio/Filter board up,
disconnecting it from the bottom entry connector pins to the Processor
board.
7. Reverse this procedure to install the new Audio/Filter board.
Remove and
Replace the
Power Amplifier
Board
To remove and replace the Power Amplifier board from the chassis:
1. Disassemble the radio chassis (refer to “Chassis Disassembly” on page
14-4).
2. Remove end connector J1.
3. Unscrew the two retaining bolts.
4. Lift the module out and remove the RF connector from under the
Power Amplifier board.
5. Reverse this procedure to install the new Power Amplifier board.
Remove and
Replace the
Antenna Tuner
Board
To remove and replace the Antenna Tuner board:
1. Disassemble the radio chassis (refer to “Chassis Disassembly” on page
14-4).
2. Remove end connector J1.
3. Disconnect the white antenna wire.
4. Unscrew the two retaining bolts.
5. Lift the module out and remove the RF connector from under the
Antenna Tuner board.
6. Reverse this procedure to reinstall the new Antenna Tuner board.
Remove and
Replace the
Mixer Board
To remove and replace the Mixer board:
1. Disassemble the radio chassis (refer to “Chassis Disassembly” on page
14-4).
2. Disconnect the Mixer board multiple-pin connector J1.
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