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TM 11-5820-890-30-5
2-29. OPERATIONAL CHECK.
Before beginning operational check, install new holding battery to replace holding battery removed for shipment
and ensure REF RT is loaded with Iockset and hopset. Hopset must be loaded in channel 2.
The operational check provides a step-by-step procedure for evaluating an RT. If the operational check is
passed, the RT can be returned to service. If it does not pass the test, the bad module or the troubleshooting
chart to be used will be identified. The troubleshooting procedures are in paragraph 2-31.
The operational check is divided into steps. Each step verifies a particular function. Follow the instruction in the
"Action" column. Check the response. If the response is correct, proceed with the next lettered step. When a
Step has been completed, proceed with the next Step. A “No response” in the “Response” column means that
any response is not of interest.
The switch settings for the test equipment are given in the “EQUIPMENT PRESETS” section of each test setup
figure. Set the test equipment switches to the indicated presets and then verify the settings. If a test response is
incorrect, check the equipment settings and the test adapter cabling before going to a troubleshooting chart or
replacing a bad module.
Connect the test setups only when directed, and with the power supply set to OFF. The large
current capacity of the test power supply can cause personal injury. Verify the test setup before
turning the power supply ON.
CAUTION
During the operational check the RT top cover is removed and a module may also be removed.
Whenever either cover is removed, take all proper electrostatic discharge (ESD) precautions.
Static electricity can damage the RT modules.
NOTES:
The RT may fail self-test if a signal is input to the AUD/FILL or AUD/DATA connec-
tor during self-test. These self-test failures may be ignored during testing unless
the procedure asks for self-test responses.
When calibrating either MOD GEN or FCTN GEN, ensure that the maintenance
group TEST EQPT SELECTOR is not in the FREQ CNTR position.
Until piece parts are provisioned, any faulty portion of the front panel assembly
will require replacement of the entire front panel assembly.
2-30
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