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LBI-38425A ALIGNMENT AND TROUBLESHOOTING PROCEDURES

5 ALIGNMENT AND TROUBLESHOOTING

PROCEDURES

Radio maintenance is facilitated by using the Troubleshooting Procedures and servicing

techniques unique to this radio. The Troubleshooting Procedures are designed to lead

the serviceman rapidly to the defective component or circuit.

Troubleshooting procedures are provided for most major problems that might arise in the

System Control/Synthesizer Board, the Transmitter, and the Receiver.

5.1 SYNTHESIZER

The Alignment and Troubleshooting procedures for Synthesizer Circuitry on System

Control/Synthesizer Board CMC-552 are as follows:

5.1.1 Test Equipment Required

•

Audio Oscillator

•

Deviation Monitor

•

Oscilloscope

•

Frequency Counter

•

RF Wattmeter (50 ohms, 100 W)

•

VTVM

•

Digital Voltmeter

•

Power Supply, 13.6 VDC regulated

Measuring System

J701-4

J701-3

RC-5429B

Audio

Oscillator

Power Supply

13.6 Vdc

Radio Coupler

(50Ω)

Deviation

Monitor

Oscilloscope

Frequency

Counter

RF wattmeter

1 2 ... 7 8 9 10 11 12 13 14 15 16 17 ... 29 30

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