Section II. TROUBLESHOOTING - TM-11-5820-919-120059

TM 11-5820-919-12

SECTION II

TROUBLESHOOTING

3. Tune Fault. A beep sound (tune tone) indicating

4-13. GENERAL.

that a tuning fault exists.

4-14. Operator and organizational troubleshooting is

4. Battery Low. A clicking sound indicating battery

limited to isolating a fault to a replaceable unit or

voltage is low.

accessory.

Fault isolation at this level may

accomplished using operational indications and distinct

audible tones produced within the radio set. This section

4-16. PERFORMANCE TEST. Performance tests are

corers the use of the audible tones, as heard in the

provided for the operator's and organizational level. The

handset, for fault indication and isolation by

the

meaning of the various audible tones available to the

operator. It also contains the radio set performance

radio set operator for fault indication and isolation is

test for complete fault isolation to the faulty! unit at the

described in table 4-3.

organizational level.

4-17. An operator's radio set performance test flowchart

4-15. USE OF AUDIBLE TONES. Audible tones are

using only audible tones, without test equipment, is

provided to indicate that the following basic operational

contained in figure 4-1.

conditions exist:

4-18. Organizational level radio set performance test

1. Normal Condition. Receiver noise in handset at

turn-on, low volume sidetone when transmitting into an

setup and test flowchart are contained in figures 4-2 and

antenna or 50 ohm load.

4-3. Air Force organizational maintenance uses the

audible tones performance test in figure 4-1.

2. Tuning. A brief (1.5to 12-second) tone (tune-up

tone) while the antenna tuner performs a tune cycle.

4-3