TM 11-5860-200-12
Table 3-3. ALT Troubleshooting Procedures.
SYMPTOM
POSSIBLE CAUSE
CORRECTIVE ACTION
Press-to-test lamps do
No lamp circuit power.
Ensure aircraft switches
not light when pressed
are in proper position
on control panel.
Defective lamps.
Replace lamps (para 3-20a).
RU FAULT lamp on
Connectors on receiver
Check security and
control panel lights
and boresight mount
proper mating of con-
during TEST mode.
may not be properly
nectors.
mated.
Failure in receiver.
Replace receiver (para
Failure in electronics
Replace electronics
assembly.
assembly (para 3-16 and 3-17).
EU FAULT lamp on
Connectors on electron-
Check security and
control panel lights
ics assembly not prop-
proper mating of con-
during TEST mode.
erly mated.
nectors.
Failure in electronics
Replace electronics
assembly.
assembly (para 3-16 and 3-17).
Failure in receiver.
Replace receiver
RU FAULT, EU FAULT
Failure in electronics
Replace electronics
and GO lamps on con-
assembly.
assembly (para 3-16 and 3-17).
trol panel do not light
Failure in receiver
Replace receiver
assembly (check gimbal
freedom).
3-15
Previous Page
