ARMY TM 5-6675-308-34
MARINE C0RPS TM 08837A-34/2
Table 4-11. CDU Testing and Troubleshooting Continued
Malfunction
Normal indication
Test procedure
indication/corrective action
ALARM DS3 sounds for 1/2 second.
ALARM DS3 sounds continuously:
The cycle repeats as long as LAMP
pushbutton is held -
Check for shorts between E014 and
and ground
Replace display logic circuit card A2
2h. Press EXECUTE switch-indicator
EXECUTE "switch-indicator goes off
to off
2i. Sequentially press CDU ON/OFF
PS fan goes off
switch-indicator and ENTER
switch
2j. Turn off PS BATTERY and
VEHICLE circuit breakers CB1
and CB2
2k. Turn off TTY
2l. Press SPU ON switch-indicator to
SPU ON switch-indicator goes off
off
2m. Disconnect CDU from computer
TEST COMPLETED
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