ARMY TM 5-6675-308-34
MARINE CORPS TM 08837A-34/2
Table 4-11. CDU Testing and Troubleshooting Continued
Malfunction
Normal indication
indication/corrective action
Test procedure
Un--
it
-- ble
Ca
W203P2
Tape Reader J1
W212P1
SPU 20J 12
TTY
W212
W201P1
SPU 20J 1
W201P2
115VAC
115VAC
TTY
Power
WIP1
CDU 4J1
Computer 1J3
W1P2
lh Check that W4P 1 is not connected
to IMU connector 2J3
1i. Press SPU ON switch-indicator to
on
lj. Set TTY printer MOTOR switch
to ON
lk. Turn on +28V power source and
set PS BATTERY and VEHICLE
circuit breakers CB1 and CB2 to
ON
CDU TEST
2.
PS fan does not turn on: Check that
PS fan activates
2a. Press CDU ON/OFF switch
system properly connected and
power and battery and VEHICLE
Various CDU indicators may light
circuit breakers CB1 and CB2 are
ON
Check cable W 1 and continuity
between Jl-12and Pl-2and Pi-10,
and J1-23 and P1-16
Repair as required
If wiring is good, replace front panel
assembly
4-73
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