TM 11-6625-291-14/TO 33A1-7-23-1
Section II TROUBLESHOOTING
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Subject
Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Operational Checks . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Symptom Index . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
6-4. OVERVIEW.
When trouble occurs, Iook for simple causes such as oxidation of contact surfaces and loose set
screws on top of impedance control. Avoid major disassembly of parts or test equipment setups
until failure not due to simple malfunction is determined.
Perform the operational checks to determine the malfunction and seethe symptom index to find the
troubleshooting procedure needed. For wiring diagrams and schematics, seepages 6-52 to 6-59.
6-5. OPERATIONAL CHECKS.
To determine the malfunction of output meter, the following operational checks must be performed:
Measurement of a known power output of a circuit with a characteristic impedance under 300
ohms (under l,000 ohms for Output Meters TS-585C/U and TS-585D/U).
Measurement of a known power output of a circuit with a characteristic impedance above 400 ohms
(above 1,250 ohms for Output Meters TS-585C/U and TS-585D/U).
See chapter 2, section Ill for operating procedures for output meters.
6-2
