TM 1-1520-238-T-5
8–194
8–108. CPG CLOCK EDGE–LIGHTING – DOES NOT LIGHT
8–108
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-T-6
TM 1-1520-238-23
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 CPG circuit breaker panel 1, close PRI LT
circuit breaker. Check for 5 VDC between
(A326):
J14–B5 and J14–B6.
Is voltage present?
YES
Go to step 3.
NO
Go to step 2.
2. Check for 5 VDC at (A326)TB1–43–C.
Is voltage present?
YES
Go to step 4.
NO
Refer to TM 1-1520-238-T-6 to
troubleshoot pilot edge–lights.
3. Check for 5 VDC between
P127–3 and P127–1.
Is voltage present?
YES
Replace CPG clock
(TM 1-1520-238-23).
NO
Repair open wire between:
P466–B5 and P127–3,
P466–B6 and P127–1.
Go to paragraph 8–105.
4. Check for open between (A326):
J14–B5 and R12–1,
R12–3 and TB1–43–C.
Does open exist?
YES
Repair open wire.
Go to paragraph 8–105.
NO
Replace resistor (A326)R12
(TM 1-1520-238-23).
END OF TASK
