TM 1-1520-238-T-5
7–108
7–30.
EMERGENCY HYDRAULIC PRESSURE INDICATOR EDGE–LIGHT – IS NOT LIGHTED
7–30
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. Check LT PRI circuit breaker.
Does circuit breaker stay closed ?
YES
Go to step 2.
NO
Refer to TM 1-1520-238-T-6 to
troubleshoot pilot edge–lights.
2. Check for 5 VDC between P746–A and P746–B.
Is voltage present?
YES
Replace emergency hydraulic
pressure indicator
(TM 1-1520-238-23).
NO
Go to step 3.
3. Check for 5 VDC between (A326):
J16–B5 and J16–B6.
Is voltage present?
YES
Repair open wire between:
P746–B and P480–B5,
P746–A and P480–B6.
Go to paragraph 7–21.
NO
Go to step 4.
4. Check for 5 VDC between (A326):
TB1–31–D and TB1–32–D.
Is voltage present?
YES
Go to step 5.
NO
Refer to TM 1-1520-238-T-6 to
troubleshoot pilot edge–lights.
5. Check for resistance between (A326):
R4–1 and R4–3.
Is resistance present?
YES
Repair open wire between
(A326):
J16–B5 and R4–1,
J16–B6 and TB1–32–D,
R4–3 and TB1–31–D.
Go to paragraph 7–21.
NO
Replace resistor (A326)R4
(TM 1-1520-238-23).
END OF TASK
