Comnet MLS II MLSH041, Руководство по обслуживанию

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LBI-38425A ALIGNMENT AND TROUBLESHOOTING PROCEDURES
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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
J1
J701-3
P1
RC-5429B
Audio
Oscillator
Power Supply
13.6 Vdc
Radio Coupler
(50
Ω)
Deviation
Monitor Oscilloscope
Frequency
Counter
RF wattmeter