TM 1-1520-238-T-5
7–110
7–32.
EMERGENCY HYDRAULIC SWITCH EDGE–LIGHT – IS NOT LIGHTED
7–32
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 PRI circuit breaker.
Is circuit breaker closed?
YES
Go to step 2.
NO
Refer to TM 1-1520-238-T-6 to
troubleshoot circuit protection
system (dc emergency bus –
pilot station).
2. On pilot EXT LT/INTR LT panel, turn INST
control knob to full BRT. Check for 5 VDC
between (A331)J2POS and case.
Is voltage present?
YES
Replace EMERG HYD switch
panel (TM 1-1520-238-23).
NO
Go to step 3.
3. Check for 5 VDC between J9–A9 and J–A10.
Is voltage present?
YES
Repair open wire between:
(A331)J2POS and J527–A11,
(A331)J2CASE and J527–A10,
P527–A11 and P487–A9,
P527–A10 and A487–A10.
Go to paragraph 7–21.
NO
Go to step 4.
4. Check for 5 VDC between (A326):
TB1–31–E and TB1–32–E.
Is voltage present?
YES
Repair open wire between
(A326):
TB1–31E and J9–A9,
TB1–32E and J9–A10.
Go to paragraph 7–21.
NO
Refer to TM 1-1520-238-T-6 to
troubleshoot circuit
protection system
(dc emergency bus – pilot
station).
END OF TASK
