TM 1-1520-238-T-5
Change 7
8–117
8–49.
CPG SDD PANEL TGT DIGITAL READOUT – DOES NOT INDICATE AMBIENT
8–49
TEMPERATURE 5
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 1-1520-238-23
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 pilot TGT indicator.
Are digital readouts within 5 temperature?
YES
Go to step 2.
NO
Go to paragraph 8–32 to
troubleshoot pilot TGT indicator.
2. With pilot and CPG ENG INST circuit breakers
(CB 17 and CB 31) closed and ambient
temperature greater than 0 C, check for 0 to
5 VDC at:
P75–28 and P75–29.
Is voltage present?
YES
Replace CPG SDD panel
(TM 1-1520-238-23).
NO
Go to step 3.
3. Check for open between:
P75–28 and P68–1,
P75–29 and P68–2.
Does open exist?
YES
Repair open wire.
Go to paragraph 8–10.
NO
Replace pilot TGT indicator
(TM 1-1520-238-23).
END OF TASK
