ARMY TM 5-6675-308-34
MARINE CORPS TM 08837A-34/2
Section III. TROUBLESHOOTING
sparks. Avoid prolonged or repeated inha-
lation of vapors.
series of malfunctions are listed in table 3-3. The
probable causes of a malfunction are listed in order of
most likely occurrence or most logical troubleshooting
procedure. Troubleshooting steps should be performed
in the order given.
Do not remove top cover to IMU. The
IMU is a sealed unit and is to be returned
a. Software built-in-test features provide additional
to depot for repair.
diagnostic capability when the CDU and computer are
operating at least partially. Troubleshooting procedures
c. If a unit is opened for repair, inspect for water
using this capability are given in table 3-4.
penetration and/or corrosion. Carefully clean off corro-
sion products with isopropyl alcohol and a soft brush.
b. The system should be inspected for physical
damage which would prevent proper operation. A bro-
Inspect gaskets and other sealing devices and tighten or
replace as necessary, If a circuit card is removed,
ken porro prism assembly or one with a damaged
inspect for bent or broken connector pins. Carefully
mirror surface requires replacement of the IMU and
-
straighten bent pins. Broken pins are replaced at depot.
memory unit.
Isopropyl alcohol is flammable and gives
off harmful vapors. Use only in well-ven-
tilated area away from open flames and
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