TM 1-1520-238-T-6
9–523
9–247. MISSION EL DC CIRCUIT BREAKER (CB93) – DOES NOT STAY CLOSED OR 28 VDC
9–247
IS NOT PRESENT AT P1-29
Tools:
Nomenclature
Part Number
Tool Kit, Electrical
SC518099CLA06
Repairer’s
Multimeter, Digital
AN/PSM-45
Personnel Required:
68X
Armament/Electrical Systems Repairer
One person to assist
References:
TM 1-1520-238-23
TM 9-1090-208-23-2
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 ELEC PWR panel, set BATT/EXT PWR
switch to EXT PWR.
Does MISSION EL DC circuit breaker (CB93)
stay closed?
YES
Go to step 3.
NO
Go to step 2.
2. Open CB93. Set BATT/EXT PWR switch to OFF.
Check for short between P1-29 and ground.
Does short exist?
YES
Repair shorted wire between
CB93-2 and P1-29.
Go to paragraph 9–233.
NO
Refer to TM 9-1090-208-23-2 to
troubleshoot external stores
control system.
3. Set BATT/EXT PWR switch to OFF. Check for
open between:
CB93-1 and CB54-1,
CB93-2 and P1-29.
Does open exist?
YES
Repair open wire.
Go to paragraph 9–233.
NO
Replace MISSION EL DC circuit
breaker (CB93)
(TM 1-1520-238-23).
END OF TASK
