TM 1-1520-238-T-6
Change 8
9–165
9–18.
GEN 1 INDICATOR - IS LIGHTED WITH GEN 1 SWITCH IN GEN 1 POSITION
9–18
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
Generator 1 inspected
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:
(A402)P1-A and (G1)P3-D,
(A402)P1-B and (G1)P3-E,
(A402)P1-C and (G1)P3-F,
(A402)P1-D and (G1)P3-A,
(A402)P1-E and (G1)P3-B,
(A402)P1-L and (G1)P2-B,
(A402)P1-M and (G1)P2-D,
(A402)P1-N and (G1)P2-F,
(A402)P1-X and (G1)P2-A,
(A402)P1-X and (G1)P2-C,
(A402)P1-X and (G1)P2-E.
Does open exist?
YES
Repair open wire.
Go to paragraph 9–12.
NO
Go to step 2.
2. APU online, GEN 1 and GEN 2 switches in the
GEN 1 / GEN 2 position, place GEN 2 switch to
the OFF position.
Does all AC electrical power cease and GEN
2/RECT 2 caution/warning lights illuminate?
YES
Go to step 3.
NO
Go to paragraph 9–333 to
troubleshoot pilot caution
warning system.
3. Check for 28VDC at (A402)P1-b.
Is voltage present?
YES
Go to step 4.
NO
Go to paragraph 9–23 to
troubleshoot DC electrical power
generation.
4. Check for 28VDC at (A402)TB2-1-E.
Is voltage present?
YES
Go to step 6.
NO
Go to step 5.
5. Check for open between (A402): TB2-1-E and
P1-e.
Does open exist?
YES
Repair open wire.
Go to paragraph 9–12.
NO
Replace GCU 1
(TM 1-1520-238-23).
6. On pilot ELEC PWR panel, set GEN 1 switch to
GEN 1. Check for 28 VDC at (A402)P5-1.
Is voltage present?
YES
Go to step 7.
NO
Go to step 8.
