TM 1-1520-238-T-6
Change 8
9–163
9–16.
GEN 1 INDICATOR - IS LIGHTED
9–16
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
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 28VDC at (A402)P1-b.
Is voltage present?
YES
Go to step 3.
NO
Go to step 2.
2. Check for open between (A402)P1-b and
(A402)W2-3.
Does open exist?
YES
Repair open wire between
(A402)P1-b and (A402)W2-3.
Go to paragraph 9–12.
NO
Go to paragraph 9–23 to
troubleshoot DC electrical power
generation.
3. Check for open between:
(A402)P1-a and (A125)P172-A8,
(A402)P1-d and (A125)P172-A9,
(A402)P1-e and (A125)P172-A10,
(A402)P1-c and (A125)P172-A7.
Does open exist?
YES
Repair open wire.
Go to paragraph 9–12.
NO
Go to step 4.
4. On pilot ELEC PWR panel, set and hold GEN 1
switch in TEST. Check for open between (A125):
J1-A7 and J1-A8,
J1-A9 and J1-A10.
Does open exist?
YES
Go to step 5.
NO
Replace GCU 1
(TM 1-1520-238-23).
5. Check for open between (A125):
J1-A10 and S2-5,
J1-A9 and S2-4,
J1-A8 and S2-3,
J1-A7 and S2-2.
Does open exist?
YES
Repair open wire.
Go to paragraph 9–12.
NO
Replace switch (A125)S2
(TM 1-1520-238-23).
END OF TASK
