TM 1–1520–238–T–3
15–6
Change 4
15–9 SIGNAL NAME:
PNVS OPERATE TO TPS (ACY) PNVS OPERATE CMD (ACZ)
MEMORY LOCATION: 001220
MEMORY DATA BIT(S):
13
(BINARY)
CONDITION:
(None)
SIGNAL FUNCTION:
Indicates either CPG or pilot has selected pilot night vision sensor (PNVS).
REMARKS: From FCC through LH FAB MRTU Type I to TPS.
PASS:
If third digit on HOD is 1, 3, 5, or 7, go to paragraph 15–10.
FAIL: Location of fault: TPS, wiring from TPS to LH FAB MRTU Type I, LH FAB MRTU Type I.
Troubleshoot wiring to isolate fault (TM 1–1270–476–T).
15–10 SIGNAL NAME:
TADS OPERATE TO TPS (ACY) TADS OPERATE CMD (ACZ)
MEMORY LOCATION: 001220
MEMORY DATA BIT(S):
12
(BINARY)
CONDITION:
(None)
SIGNAL FUNCTION:
Indicates CPG has selected TADS as LOS.
REMARKS: From FCC through LH FAB MRTU Type I to TPS.
PASS:
If third digit on HOD is 4, 5, 6, or 7, go to paragraph 15–11.
FAIL: Location of fault: TPS, wiring from TPS to LH FAB MRTU Type I, LH FAB MRTU Type I.
Troubleshoot wiring to isolate fault (TM 1–1270–476–T).
15–11 SIGNAL NAME:
TADS OPERATE TO TEU (ACY) TADS OPERATE CMD (ACZ)
MEMORY LOCATION: 001244
MEMORY DATA BIT(S):
19
(BINARY)
CONDITION:
(None)
SIGNAL FUNCTION:
Indicates CPG selection of TADS.
REMARKS: From FCC through LH FAB MRTU Type I to TEU.
PASS:
If first digit on HOD is 1, 3, 5, or 7, go to paragraph 15–12.
FAIL: Location of fault: LH FAB MRTU Type I, wiring from LH FAB MRTU Type I to TEU, TEU.
Troubleshoot wiring to isolate fault (TM 1–1270–476–T).
15–12 SIGNAL NAME:
FLIR STBY TO TEU (ACY) FLIR STBY CMD (ACZ)
MEMORY LOCATION: 001245
MEMORY DATA BIT(S):
18
(BINARY)
CONDITION:
(None)
SIGNAL FUNCTION:
Indicates CPG has selected TADS.
REMARKS: From FCC through LH FAB MRTU Type I to TEU.
PASS:
If first digit on HOD is 2, 3, 6, or 7, go to paragraph 15–13.
FAIL: Location of fault: LH FAB MRTU Type I, wiring from LH FAB MRTU Type I to TEU, TEU.
Troubleshoot wiring to isolate fault (TM 1–1270–476–T).
15–13 SIGNAL NAME:
TADS SERVO STATUS
MEMORY LOCATION: 001136
MEMORY DATA BIT(S):
11
(BINARY)
CONDITION:
(None)
SIGNAL FUNCTION:
Indicates fault detection and location system (FD/LS) servo failure.
REMARKS: From TADS electronics unit (TEU) through LH FAB MRTU Type I to FCC.
PASS:
Location of fault if third digit on HOD is 4, 5, 6, or 7: wiring between FCC and TEU.
Troubleshoot wiring to isolate fault (TM 1–1270–476–T).
FAIL: Location of fault: TEU, wiring from TEU to LH FAB MRTU Type I, LH FAB MRTU Type I.
Troubleshoot wiring to isolate fault (TM 1–1270–476–T).
