TM 1-1520-238-T-6
9397
9156. MISSION SYM GEN CIRCUIT BREAKER (CB45) DOES NOT STAY CLOSED
9156
OR 115 VAC IS NOT PRESENT AT P1-52
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 11-5895-1184-23
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 ELEC PWR panel, set BATT/EXT PWR
switch to EXT PWR.
Does MISSION SYM GEN circuit breaker
(CB45) stay closed?
YES
Go to step 4.
NO
Go to step 2.
2. Open CB45. Set BATT/EXT PWR switch to OFF.
Check for short between P1-52 and ground.
Does short exist?
YES
Go to step 3.
NO
Refer to TM 11-5895-1184-23 to
troubleshoot symbol generator
system.
3. Detach wire at CB45-2. Check for short between
P1-52 and ground.
Does short exist?
YES
Repair shorted wire between
CB45-2 and P1-52.
Go to paragraph 9150.
NO
Replace MISSION SYM GEN
circuit breaker (CB45)
(TM 1-1520-238-23).
4. Set BATT/EXT PWR switch to OFF. Check for
open between:
CB45-1 and CB42-A1,
CB45-2 and P1-52.
Does open exist?
YES
Repair open wire.
Go to paragraph 9150.
NO
Replace MISSION SYM GEN
circuit breaker (CB45)
(TM 1-1520-238-23).
END OF TASK