GENERATION OF TROUBLESHOOTING CHARTS

TM 11-5820-401-34-3/0967-LP-432-3060

2-5. ORGANIZATION OF TROUBLESHOOTING CHARTS. (CONT)

Each troubleshooting logic flow chart is generated by the failure of one of several performance tests,

all of which are located in section 1 of chapters 3, 4, and 5. The preceding illustration shows the logic

flow involved in generating a troubleshooting procedure.

Referring to the preceding illustration, it can be noted that the performance tests in section 1 are done

prior to troubleshooting. The first performance test is the VOLUME control test. If the radio fails the

VOLUME control test, troubleshooting must be done to determine the cause of failure. In this example,

the "NO" flow line leads to the box containing the instruction "perform `no audio' troubleshooting. "

Performance of the troubleshooting procedure results in the determination of the need for alinement or

repair. When these tasks are accomplished, the performance test must be repeated to insure that the

corrective action was sufficient to enable the radio to pass the VOLUME control test. Therefore, a flow

line from the corrective action box leads back to the start of the performance tests.

If the radio passes the VOLUME control test, the SINAD test is next in order. The decision diamond

containing the SINAD test has "YES" and "NO" flow lines as does the previous diamond. The "YES` flow

line leads to an additional performance test, while the "NO" flow line leads to a second troubleshooting

flow chart. This pattern is repetitive down to the last performance test. If the radio passes all

performance tests, no troubleshooting is done, and it is returned to service.

2-5