TM 1-1520-238-T-5
8–154
8–82.
PILOT AND CPG ENG–RTR RPM% INDICATORS – DO NOT INDICATE NR
8–82
Tools:
Nomenclature
Part Number
Tool Kit, Electrical
SC518099CLA06
Repairer’s
Multimeter, Digital
AN/PSM-45
Personnel Required:
68X
Armament/Electrical Systems Repairer
References:
TM 1-1520-238-23
Equipment Conditions:
Ref
Condition
TM 1-1520-238-23
Non–transparent barrier
removed
Access provisions –
L200 panel 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. Detach wire ends at XT1–B and XT1–D,
(A326)TB1–9–F and (A326) TB1–9–L.
Check for open between (wire ends):
TB1–9–L and XT1–B,
TB1–9–F and XT1–D.
Does open exist?
YES
Repair open wire.
Go to paragraph 8–10.
NO
Go to step 2.
2. Detach wire ends at XT1–A and XT1–E. Check
for 230 5 ohms resistance between (wire ends):
XT1–A and XT1–E.
Is resistance present?
YES
Go to step 3.
NO
Replace main transmission
magnetic pick–up
(rotor speed sensor)
(TM 1-1520-238-23).
3. Check for short between (A326):
TB1–9–F and TB1–9–L,
TB1–9–F and ground.
Does short exist?
YES
Repair shorted wire between:
XT1–D and J755–22,
P755–22 and J456–A4,
P456–A4 and P482–A8,
XT1–B and J755–23,
P755–23 and J456–A5,
P456–A5 and P482–A–9.
(A326):
J18–A8 and TB1–9–F,
J18–A9 and TB1–9–L.
Go to paragraph 8–10.
NO
Replace isolation transformer
module 1 (TM 1-1520-238-23).
END OF TASK
