TM 11-5820-890-10-1
I TROUBLESHOOTING PROCEDURES Continued
l
CONTROL MONITOR. Displays
PROCEDURE. Normal displays are not shown here. If no solution
ITEM
is given, or if troubleshooting procedure does not result in a
normal display, get unit maintenance to check CM.
CM
NOTE
If all displays except CONTROL are blank, make sure RADIO
switch is at correct setting: then set RT FCTN to REM.
Indicates CM is faulty.
Indicates RT response fail-
ure. Set INIT to UP: then re-
lease. If "F7" remains on
display: RT, CM, or inter-
connecting cabling is faulty.
Indicates response failure for
second CM when two are
being used.
Indicates operator error.
Check operating procedure.
Indicates RT channel is not
loaded or RT problem exists
when CHAN blinks and all
other displays are normal.
Check RT channel.
RCU. Self-test and functioning.
PROCEDURE. If no solution is given, or if troubleshooting
ITEM
procedure does not result in a normal display, get unit
maintenance to check RCU.
RCU, radio
a. Assemble RCU and connect two-wire to radio system.
b. Do self-test procedure.
l If test does not end with “GOOD”, make sure you have
performed assembly procedures correctly, set RT FCTN
to REM, made sure that the two-wire link is not cut, etc.;
then repeat self-test. If self-test does not end in
‘GOOD”, or RCU did not place RT in self-test, turn in
RCU and radio to unit maintenance.
c. Do ICM procedure.
l If radio or RCU displays fail to show “CALL”, turn in
radio and RCU to unit maintenance.
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