WJ-8611 DIGITAL VHF/UHF RECEIVER
MAINTENANCE 6-1
SECTION 6
MAINTENANCE
6.1 GENERAL
The WJ-8611 Digital VHF/UHF Receiver has been designed to operate for
extended periods of time with a minimum of routine maintenance.
Cleaning, inspection and performance testing should be performed at
regular intervals, consistent with the facility’s normal scheduling and after
repairs have been made.
6.2 CLEANING AND LUBRICATION
The receiver should be kept free of dust, moisture, grease and other foreign
matter to ensure trouble-free operation. Use low pressure air, if available,
to remove accumulated dust from the interior of the receiver. A clean, dry
cloth or soft bristled brush may also be used for this purpose. No
lubrication is required.
6.3 INSPECTION FOR DAMAGE AND WEAR
Many existing or potential troubles can be detected by making a thorough
visual inspection of the unit. For this reason, as a first step in
troubleshooting, a complete visual inspection should be made whenever
the unit is inoperative. Inspect mechanical parts such as pin connectors
and interconnecting cables for looseness, wear and other signs of
deterioration. The circuit card assemblies should be checked to assure that
they are properly secured to the chassis and making good electrical
contact. Electronic components that show signs of deterioration due to
causes, such as overheating, should be inspected and a thorough
investigation of the associated circuitry should be made to verify proper
operation. Often, damage due to heat is a result of other, less apparent
problems in the circuit.
6.4 TEST EQUIPMENT REQUIRED
Procedures for testing the WJ-8611 Receiver have been developed for
performance using a minimum of common test equipment. The test
equipment listed in
Table 6-1
, or equivalents, are required to perform the
troubleshooting procedures and performance tests described in this section.
6.5 TROUBLESHOOTING AND FAULT ISOLATION
The tests procedures that are provided in this section verify proper receiver
operation and assist in fault isolation to a malfunctioning assembly. They
have been developed to set known laboratory conditions that eliminate
external conditions as a possible cause of the malfunction. Use the
performance tests in
paragraph 6.6
and the circuit descriptions in
Section 5
to assist in fault isolation.
Courtesy of http://BlackRadios.terryo.org
Summary of Contents for WJ-8611
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