TM 11-5860-200-12
Table 3-3. ALT Troubleshooting Procedures - Continued.
SYMPTOM
POSSIBLE CAUSE
CORRECTIVE ACTION
GO lamp lights in
Failure in control panel.
Replace control panel
TEST mode, but sys-
tem (ALT) will not scan
or track.
RU FAULT or EU
Laser operating in equip-
Stop laser operation if
FAULT lamp lights and
ment field of view.
possible and repeat self-
TRACK lamp stays on
test.
during TEST mode.
Failure in receiver.
Replace receiver
TSU fails to track ALT.
Failure in receiver.
b. Replace receiver if
Failure in electronics
assembly.
b. Replace electronics
Failure in interfacing sys-
Refer to higher category
tems.
of maintenance.
ALT tracks laser with
Failure in electronics
Replace electronics
different code.
assembly.
Failure in receiver.
Replace receiver
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