TM 1-1520-238-T-5
8–193
8–107. PILOT CLOCK EDGE–LIGHTING – DOES NOT LIGHT
8–107
Tools:
Nomenclature
Part Number
Tool Kit, Electrical
SC518099CLA06
Repairer’s
Multimeter, Digital
AN/PSM-45
Personnel Required:
68X
Armament/Electrical Systems Repairer (2)
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 pilot center circuit breaker panel, close LT
PRI circuit breaker. Check for 5 VDC between
(A326):
J9–A15 and J9–A16.
Is voltage present?
YES
Go to step 3.
NO
Go to step 2.
2. Check for 5 VDC at
(A326)TB1–33–D.
Is voltage present?
YES
Repair open wire between
(A326):
J9–A15 and TB1–33–D,
J9–A16 and TB1–34–D.
Go to paragraph 8–105.
NO
Refer to TM 1-1520-238-T-6 to
troubleshoot pilot edge–lights.
3. Check for 5 VDC between
P121–1 and P121–3.
Is voltage present?
YES
Replace pilot clock
(TM 1-1520-238-23).
NO
Repair open wire between:
P487–A15 and P121–3,
P487–A16 and P121–1.
Go to paragraph 8–105.
END OF TASK
