TM 1-1520-238-T-6
9–422
9–174. SHORT – EXISTS BETWEEN P461–D, P461–E, OR P461–F AND GROUND
9–174
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
Equipment Conditions:
Ref
Condition
Paragraph 9–148
All CPG ac essential bus 1
circuit breakers open
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. Detach P763. Check for short between: P461-D
and ground,
P461-E and ground,
P461-F and ground.
Does short exist?
YES
Repair shorted wire between:
P461-D and P763-A,
P461-E and P763-B,
P461-F and P763-C.
Go to paragraph 9–172.
NO
Go to step 2.
2. Check for short between J764-F and ground.
Does short exist?
YES
Go to step 3.
NO
Go to step 11.
3. Check for short between (A77)J2-30 and
ground.
Does short exist?
YES
Go to step 4.
NO
Repair shorted wire between
P767-30 and J764-F.
Go to paragraph 9–172.
4. Detach wire ends at CB18-1. Check for short
between (A77)J2-30 and ground.
Does short exist?
YES
Repair shorted wire between
(A77)J2-31 and CB18-1.
Go to paragraph 9–172.
NO
Go to step 5.
5. Check for short between CB18-1 and ground.
Does short exist?
YES
Replace MSL R OUTBD LCHR
AC circuit breaker (CB18)
(TM 1-1520-238-23).
NO
Go to step 6.
6. With CB18 attached, detach wire at CB21-1.
Check for short between (A77)J2-30 and
ground.
Does short exist?
YES
Repair shorted wire between
CB21-1 and CB18-1.
Go to paragraph 9–172.
NO
Go to step 7.
7. Check for short between CB21-1 and ground.
Does short exist?
YES
Replace MSL R INBD LCHR
AC circuit breaker (CB21)
(TM 1-1520-238-23).
NO
Go to step 8.
