TM 1-1520-238-T-4
Change 10
6–91
6–30.
TEMP TR INDICATOR – LIGHTS
6–30
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
Equipment Conditions:
Ref
Condition
TM 1-1520-238-23
Access provisions –
L200, R295, L510,
R510, L530, and
R540 access doors
open
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. Visually inspect T/R gearbox for low oil level and
damage (TM 1-1520-238-23).
Is damage present?
YES
Replace T/R gearbox.
(TM 1-1520-238-23).
NO
Go to step 2.
2. Detach P201.
Does TEMP TR indicator remain lighted?
YES
Go to step 4.
NO
Go to step 3.
3. Check resistance between P201–S and P201–A.
Is resistance greater than 2.45 megohms?
YES
Go to step 6.
NO
Go to step 5.
4. Check for short between P18–25 and ground.
Does short exist?
YES
Check for short between;
P18–25 and P914–A10,
J914–A10 and J449–A20,
P449–A20 and J410–B7,
P410–B7 and P201–c.
Repair shorted wire segment.
Go to paragraph 6–12.
NO
Refer to TM 1-1520-238-T-6 to
troubleshoot the pilot
caution/warning system.
5. Remove TGB thermistor probe RT7
(TM 1-1520-238-23). Check for short between
P201–K and ground.
Does short exist?
YES
Repair shorted wire between
P201–K and thermistor RT7. Go
to paragraph 6–12.
NO
Replace TGB thermistor probe
RT7 (TM 1-1520-238-23).
6. Check resistance between P201–S and
P201–C.
Is resistance greater than 2.45 megohms?
YES
Go to step 8.
NO
Go to step 7.
7. Remove TGB thermistor probe RT8
(TM 1-1520-238-23). Check for short between
P201–C and ground.
Does short exist?
YES
Repair shorted wire between
P201–C and thermistor RT8
(TM 1-1520-238-23). Go to
paragraph 6–13.
NO
Replace TGB thermistor probe
RT8 (TM 1-1520-238-23).
