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TM 11-5821-333-12
6-13. OPERATIONAL CHECK. Continued
ACTION
RESPONSE
Step 2. RT/RCU SELF-TEST.
a. Set RT/RCU switches as follows:
MODE
SC
IFM RF PWR
OFF
PRESET
MAN
b. Set RT/RCU FUNCTION switch to , then
c. Set RT/RCU FUNCTION switch to TEST.
d. Check for panel illumination.
a. No response.
b. Response:
c. Responses:
If not, go to chart 6,
page 6-1 7).
Displayed for about
3 seconds.
Displayed for about
2 seconds.
Displayed for about
7 seconds.
End of cycle,
If display is blank, go to chart 2 (page 6-13).
If display shows random characters and does
not display “- - - - -, “ or does not continue
sequence,
RT-1476 or RT-1476A: RT is bad
RT-1477 or RT-1477A: RCU is bad
If display shows “- - - - -,” but then be-
comes random characters, go to chart 3
(page 6-14),
If some segments do not light during “88888”
display or some segments stay on, go to
chart 4 (page 6-15).
If display reads “FAIL8,”
RT-1476 or RT-1476A: RT is bad
RT-1477 or RT-1477A: RCU is bad
If display reads “FAIL1 ,” repeat test. If display
still reads “ FAIL1, ” RT is bad.
If display reads “ FAIL3, ” RT is bad.
If display reads “ FAIL7, ” go to chart 5 (page
6-16) .
d. Panel is lit. If not, go to chart 2 (page 6-13),
6-5
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