TM 1–1520–238–T–3
Change 4
25–5
25–14 SIGNAL NAME:
PLT GUN NORMAL SW
MEMORY LOCATION: 001120
MEMORY DATA BIT(S):
18
(BINARY)
CONDITION:
(None)
SIGNAL FUNCTION:
Selects gun off or on.
REMARKS: From pilot FCP through LH FAB MRTU Type I to FCC.
PASS:
If first digit displayed on HOD is 2, 3, 6, or 7, go to Chapter 5, paragraph 5–38.
FAIL: Location of fault: pilot FCP, wiring from pilot FCP to LH FAB MRTU Type I, LH FAB MRTU Type
I. Troubleshoot wiring to isolate fault (TM 9–1230–476–20–2).
25–15 SIGNAL NAME:
PLT GUN FIXED SW
MEMORY LOCATION: 001120
MEMORY DATA BIT(S):
19
(BINARY)
CONDITION:
(None)
SIGNAL FUNCTION:
Drives gun to fixed forward position.
REMARKS: From pilot FCP through LH FAB MRTU Type I to FCC.
PASS:
If first digit displayed on HOD is 1, 3, 5, or 7, Chapter 5, paragraph 5–32.
FAIL: Location of fault: pilot FCP, wiring from pilot FCP to LH FAB MRTU Type I, LH FAB MRTU Type
I. Troubleshoot wiring to isolate fault (TM 9–1230–476–20–2).
25–16 SIGNAL NAME:
PLT SIGHT SEL
MEMORY LOCATION: 001122
MEMORY DATA BIT(S):
4–7
(HEX)
CONDITION:
If the sixth digit displayed on HOD is 1 and the fifth digit is 3=HMD,
(Chapter 7, paragraph 7–55)
If the sixth digit displayed on HOD is 1 and the fifth digit is 5=PNVS,
(Chapter 10, paragraph 10–5)
If the sixth digit displayed on HOD is 1 and the fifth digit is 6=TADS,
(Chapter 15, paragraph 15–5)
SIGNAL FUNCTION:
Indicates pilot selected sight sensor.
REMARKS: From pilot FCP through LH FAB MRTU Type I to FCC.
PASS:
If display on HOD corresponds to selected pilot FCP switch position, go to paragraph 25–17.
FAIL: Location of fault: pilot FCP, wiring from pilot FCP to LH FAB MRTU Type I, LH FAB MRTU Type
I. Troubleshoot wiring to isolate fault (TM 9–1230–476–20–2).
25–17 SIGNAL NAME:
PLT CPG ACQ SW (ACY) PLT ACQ SEL SW (ACZ)
MEMORY LOCATION: 001122
MEMORY DATA BIT(S):
8–9
(BINARY)
CONDITION:
If the fourth digit displayed on HOD is 2 or 3=CPG
(Chapter 15, paragraph 15–127)
If the fourth digit displayed on HOD is 4 or 5=NVS FXD
(Chapter 10, paragraph 10–30)
If the fourth digit displayed on HOD is 6 or 7=OFF
SIGNAL FUNCTION:
Selects cueing symbology or NVS to fixed forward.
REMARKS: From pilot FCP through LH FAB MRTU Type I to FCC.
PASS:
If fourth digit displayed on HOD corresponds to selected switch position, go to
paragraph 25–18.
FAIL: Location of fault: pilot FCP, wiring from pilot FCP to LH FAB MRTU Type I, LH FAB MRTU Type
I. Troubleshoot wiring to isolate fault (TM 9–1230–476–20–2).
