TM 1-1520-238-T-6
Change 8
9–469
9–208. SHORT – EXISTS BETWEEN P4-M OR P4-N AND GROUND
9–208
Tools:
Nomenclature
Part Number
Tool Kit, Electrical
SC518099CLA06
Repairer’s
Multimeter, Digital
AN/PSM-45
Personnel Required:
68X
Armament/Electrical Systems Repairer
Equipment Conditions:
Ref
Condition
Paragraph 9–148
All dc essential bus 1 pilot
station 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. On Pilot Aft Circuit Breaker Panel, open the
following circuit breakers:
STAB MAN DC (CB6), ECS CANOPY ANTI-ICE
CONTR (CB70), ECS WSHLD WPR (CB71),
ECS ENG ANTI-ICE (CB67), POWER BATT
CHGR DC (CB5), and CBR BLWR (CB94).
Check for short between P4-N and ground.
Does short exist?
YES
Go to step 2.
NO
Go to step 3.
2. Detach wire ends at CB71-1. Check for short
between P4-N and ground.
Does short exist?
YES
Repair shorted wire between
P4-N and CB71-1.
Go to paragraph 9–206.
NO
Repair shorted wire between:
CB71-1 and CB67-1,
CB67-1 and CB5-1,
CB5-1 and CB94-1.
Go to paragraph 9–206.
3. Detach wire ends at CB6-1. Check for short
between P4-M and ground.
Does short exist?
YES
Repair shorted wire between
P4-M and CB6-1.
Go to paragraph 9–206.
NO
Repair shorted wire between
CB6-1 and CB70-1.
Go to paragraph 9–206.
END OF TASK
