TM 1-1520-238-T-6
9514
9238. NAV DPLR CIRCUIT BREAKER (CB82) DOES NOT STAY CLOSED OR 28 VDC IS
9238
NOT PRESENT AT P1-51
Tools:
Nomenclature
Part Number
Tool Kit, Electrical
SC518099CLA06
Repairers
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 NAV DPLR circuit breaker (CB82) stay
closed?
YES
Go to step 4.
NO
Go to step 2.
2. Open CB82. Set BATT/EXT PWR switch to OFF.
Check for short between P1-51 and ground.
Does short exist?
YES
Go to step 3.
NO
Refer to TM 11-1520-238-23-2
to troubleshoot IFF system.
3. Detach wire at CB82-2. Check for short between
P1-51 and ground.
Does short exist?
YES
Repair shorted wire between
CB82-2 and P1-51.
Go to paragraph 9233.
NO
Replace NAV DPLR circuit
breaker (CB82)
(TM 1-1520-238-23).
4. Set BATT/EXT PWR switch to OFF. Check for
open between:
CB61-1 and P4-K,
CB61-2 and P2-k.
Does open exist?
YES
Go to step 5.
NO
Replace NAV DPLR circuit
breaker (CB82)
(TM 1-1520-238-23).
5. Check for open between CB82-2 and P1-51.
Does open exist?
YES
Repair open wire
Go to paragraph 9233.
NO
Replace bus bar between CB54
and CB82, and check for foreign
material (TM 1-1520-238-23).
END OF TASK