TM 1-1520-238-T-6
9–330
9–115.
PILOT LT PRI CIRCUIT BREAKER (CB39) – DOES NOT STAY CLOSED
9–115
Tools:
Nomenclature
Part Number
Tool Kit, Electrical
SC518099CLA06
Repairer’s
Multimeter, Digital
AN/PSM-45
Personnel Required:
68X
Armament/Electrical Systems Repairer
References:
TM 1-1520-238-23
WARNING
Turn off power before detaching or
attaching wires and connectors. High
current 28 VDC or 115 VAC is present.
Failure to do so could result in death or
serious injury.
1. On pilot center circuit breaker panel, open LT
PRI circuit breaker (CB39). Check for short
between ground and P1-45.
Does short exist?
YES
Go to paragraph 9–150 to
troubleshoot circuit protection
system (ac essential bus 1 –
pilot station).
NO
Go to step 2.
2. Detach P457. Check for short between
(A402)J1-45 and ground.
Does short exist?
YES
Repair shorted wire.
Go to paragraph 9–113.
NO
Go to step 3.
3. Detach P109. Check for short between P457-A7
and ground.
Does short exist?
YES
Repair shorted wire.
Go to paragraph 9–113.
NO
Replace multi-channel dimming
controller (TM 1-1520-238-23).
END OF TASK
