TM 1-1520-238-T-6
9–457
9–201. AWS MTR CIRCUIT BREAKER (CB3) – DOES NOT STAY CLOSED OR CONTINUITY
9–201
DOES NOT EXIST BETWEEN (A77): J4-H AND J3-4, J4-B AND J3-5, J4-E AND J3-6
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 circuit breaker AWS MTR circuit
breaker (CB3) stay closed?
YES
Go to step 4.
NO
Go to step 2.
2. Open CB3. Set BATT/EXT PWR switch to OFF.
Check for short between (A77):
J3-4 and ground,
J3-5 and ground,
J3-6 and ground.
Does short exist?
YES
Go to step 3.
NO
Refer to TM 9-1090-208-23-2 to
troubleshoot area weapon
system.
3. Detach wires at CB3-A2, CB3-B2, and CB3-C2.
Check for short between (A77):
J3-4 and ground,
J3-5 and ground,
J3-6 and ground.
Does short exist?
YES
Repair shorted wire.
Go to paragraph 9–199.
NO
Replace AWS MTR circuit
breaker (CB3)
(TM 1-1520-238-23).
4. Set BATT/EXT PWR switch to OFF. Check for
open between:
CB3-A1 and (A77)J4-H,
CB3-B1 and (A77)J4-B,
CB3-C1 and (A77)J4-E,
CB3-A2 and (A77)J3-4,
CB3-B2 and (A77)J3-5,
CB3-C2 and (A77)J3-6.
Does open exist?
YES
Repair open wire.
Go to paragraph 9–199.
NO
Replace AWS MTR circuit
breaker (CB3)
(TM 1-1520-238-23).
END OF TASK
