TM 1-1520-238-T-6
9–602
9–307. EMERG BATT VHF AM/FM CIRCUIT BREAKER (CB32) – DOES NOT STAY CLOSED
9–307
OR CONTINUITY DOES NOT EXIST BETWEEN (A77): J4-C AND J1-7
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 11-1520-238-23-2
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 EMERG BATT VHF AM/FM circuit
breaker (CB32) stay closed?
YES
Go to step 4.
NO
Go to step 2.
2. Open CB32. Set BATT/EXT PWR switch to OFF.
Check for short between (A77)J1-7 and ground.
Does short exist?
YES
Go to step 3.
NO
Refer to TM 11-1520-238-23-2
to troubleshoot VHF AM-FM
radio set.
3. Detach wire at CB32-2. Check for short between
(A77)J1-7 and ground.
Does short exist?
YES
Repair shorted wire between
CB32-2 and (A77)J1-7.
Go to paragraph 9–304.
NO
Replace EMERG BATT VHF
AM/FM circuit breaker (CB32)
(TM 1-1520-238-23).
4. Set BATT/EXT PWR switch to OFF. Check for
open between CB32-2 and (A77)J1-7.
Does open exist?
YES
Repair open wire.
Go to paragraph 9–304.
NO
Replace EMERG BATT VHF
AM/FM circuit breaker (CB32)
(TM 1-1520-238-23).
END OF TASK
