TM 1-1520-238-T-7
Change 3
11–305
11–73. CPG DIR 1 DCPLR NO-GO CPG COMPARTMENT OR CPG DIR 2 DCPLR
11–73
NO-GO CPG COMPARTMENT – APPEARS ON HOD
Tools:
Nomenclature
Part Number
Tool Kit, Electrical
SC518099CLA06
Repairer’s
Multimeter, Digital
AN/PSM-45
Personnel Required:
68X
Armament/Electrical Systems Repairer
One person to assist
References:
TM 1-1520-238-23
Equipment Conditions:
Ref
Condition
TM 1-1520-238-23
Access provisions –
R295 door 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. With BUCS TST switch held in PLT or CPG
position, check for 28 VDC at P686–125 and
P686–126.
Is voltage present?
YES
Go to step 2.
NO
Go to step 4.
2. Check CPG directional SPAD shear pin
condition (TM 1-1520-238-23).
Is shear pin sheared?
YES
Replace shear pin
(TM 1-1520-238-23).
NO
Go to step 3.
3. Detach P472 and P459. Check for short
between:
J273–1 and J273–2,
J273–1 and J273–4.
Does short exist?
YES
Repair shorted wire between:
J273–1 and P472–A17,
J273–2 and P908–A2,
J273–4 and P908–A4,
J908–A2 and J459–A20,
J908–A4 and J459–A4.
Go to paragraph 11–23.
NO
Replace directional SPAD
(TM 1-1520-238-23).
4. Check for open between:
J273–2 and P686–125,
J273–4 and P686–126.
Does open exist?
YES
Repair open wire.
Go to paragraph 11–23.
NO
Go to step 5.
5. Check for open between:
P1–2 and P1–3,
P1–3 and P1–4.
Does open exist?
YES
Replace directional SPAD
(TM 1-1520-238-23).
NO
(ACA) Replace DASEC
(TM 1-1520-238-23).
(ACB) Go to step 6.
6. (ACB) Detach filter adapter A707. Check for
open through pins A707–125 and A707–126.
Does open exist?
YES
Replace filter adapter
(TM 1-1520-238-23).
NO
Replace DASEC
(TM 1-1520-238-23).
END OF TASK
