TM 1-1520-238-T-6
9–226
9–51.
EXTERNAL POWER – DOES NOT COME THROUGH EXTERNAL
9–51
POWER CONTACTOR
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
Equipment Conditions:
Ref
Condition
TM 1-1520-238-23
Electrical power
distribution box cover
removed
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 open between:
J14-A and (A402)K7-T1,
J14-B and (A402)K7-T2,
J14-C and (A402)K7-T3.
Does open exist?
YES
Repair open wire.
Go to paragraph 9–47.
NO
Go to step 2.
2. Detach P13. Detach wire at J14-A, J14-B, and
J14-C. Check for short between all wire ends
and ground.
Does short exist?
YES
Repair shorted wire.
Go to paragraph 9–47.
NO
Go to step 3.
3. Attach J14 wire ends. Check for open between:
J14-A and P13-1,
J14-B and P13-2,
J14-C and P13-3,
Does open exist?
YES
Repair open wire.
Go to paragraph 9–47.
NO
Go to step 4.
4. Check for open between:
P13-4 and ground,
P13-5 and J14-F,
J14-E and P430-A2.
Does open exist?
YES
Repair open wire.
Go to paragraph 9–47.
NO
Go to step 5.
5. Check for 28 VDC at P430-A2.
Is voltage present?
YES
Go to step 6.
NO
Replace external power monitor
(TM 1-1520-238-23).
6. Check for open between (A402):
J6-A2 and P11-9,
P11-10 and J20-A1.
Does open exist?
YES
Repair open wire.
Go to paragraph 9–47.
NO
Go to step 7.
7. Check for open between (A402)K2:
J1-9 and J1-10.
Does open exist?
YES
Replace generator 2 contactor
(TM 1-1520-238-23).
NO
Go to step 8.
