TM 1-1520-238-T-6
9–310
9–110.
EMERG BATT UTIL SEC LT CIRCUIT BREAKER (CB30) – DOES NOT STAY CLOSED
9–110
Tools:
Nomenclature
Part Number
Tool Kit, Electrical
SC518099CLA06
Repairer’s
Multimeter, Digital
AN/PSM-45
Personnel Required:
68X
Armament/Electrical Systems Repairer
References:
TM 1-1520-238-23
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. Check for short between (A77):
J1-2 and ground,
J1-3 and ground.
Does short exist?
YES
Go to paragraph 9–304 to
troubleshoot circuit protection
system (dc emergency bus –
CPG station).
NO
Go to step 2.
2. Detach DS17 SP1. Check for short between
P766-2 and ground.
Does short exist?
YES
Repair shorted wire between
P766-2 and DS17 SP1.
Go to paragraph 9–108.
NO
Go to step 3.
3. Attach DS17 SP1. Check for resistance between
P766-2 and ground.
Is resistance present?
YES
Go to step 4.
NO
Replace CPG utility light
(TM 1-1520-238-23).
4. Check for short between P101-B10 and ground.
Does short exist?
YES
Repair shorted wire between
P101-B10 and P766-3.
Go to paragraph 9–108.
NO
Go to step 5.
5. Detach J168 and J1039. Check for short
between:
P101-A2 and ground,
P101-A3 and ground,
P101-A5 and ground.
Does short exist?
YES
Repair shorted wire between:
P101-A2 and J1039-B13,
P101-A2 and J168-A2,
P101-A3 and J1039-B16,
P101-A3 and J168-A3,
P101-A3 and J168-A5,
P101-A5 and J1039-B12,
P101-A5 and J168-A4.
Go to paragraph 9–108.
NO
Go to step 6.
6. Check for resistance between (A322):
P1-B12 and ground,
P1-B13 and ground,
P1-B16 and ground.
Is resistance present?
YES
Repair shorted wire between
(A322):
P1-B12 and XDS5-1,
P1-B13 and XDS7-1,
P1-B16 and XDS6-1.
Go to paragraph 9–108.
NO
Go to step 7.
