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TM 11-5821-333-12
PREVENTIVE MAINTENANCE CHECKS AND SERVICES TABLES
RT/RCU SELF-TEST
Item
When
Equipment not
No.
B
A
PROCEDURE
ready/available
if:
1
a. Set RT/RCU switches:
PRESET
MAN
MODE
SC
b. Set RT/RCU FUNCTION switch to TEST
Display is incorrect.
and watch display:
Displayed for about 3 seconds.
Signals beginning of self-test.
Displayed for about 2 seconds.
Indicates ECCM module present
in RT.
Displayed for about 7 seconds.
Tests all segments of display, RT
control and receiver functions.
End of cycle. RT has passed
self-test.
DRA SELF-TEST
Item
When
Equipment not
No.
B
A
PROCEDURE
ready/available
if:
NOTE
Do this test only if your radio set has a DRA.
2
a. Set RT/RCU FUNCTION switch to SQ ON.
b. Listen to headset, and switch circuit breaker for
DRA to OFF then back to ON.
c. A beep is heard.
Beep is not heard.
If a steady 1200-Hz tone is heard, terminate
Tone does not stop
tone by pressing headset PTT, and repeat
or tone repeats.
test.
5-2
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