TM 1-1520-238-T-6
Change 8
9–169
9–21.
RECT 2 INDICATOR - IS LIGHTED WITH GEN 2 SWITCH OFF AND GEN 1
9–21
SWITCH SET TO GEN 1
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 20–70 ohms resistance between
(A402-K2)J1-3 and J1-4 and less than 1 ohm
between (A402-K2)J1-5 and J1-6.
Is resistance correct?
YES
Go to step 2.
NO
Replace ac contactor 2
(TM 1-1520-238-23).
2. Check for open between (A402):
P11-6 and ground,
P11-5 and P11-4,
P11-3 and P5-14,
P5-13 and P7-j.
Does open exist?
YES
Repair open wire.
Go to paragraph 9–12.
NO
Go to step 3.
3. Check for 28 VDC at (A402-K1)P5-13.
Is voltage present?
YES
Replace AC contactor 1
(TM 1-1520-238-23).
NO
Go to step 4.
4. Check for 28 VDC at (A402)P7-b.
Is voltage present?
YES
Go to step 5.
NO
Go to paragraph 9–23 to
troubleshoot DC electrical power
generation.
5. Check for open between (A402)P7-c and P7-k.
Does open exist?
YES
Repair open wire.
Go to paragraph 9–12.
NO
Replace GCU 2
(TM 1-1520-238-23).
END OF TASK
