TM 1–1520–238–T–3
15–48
Change 4
15–207 SIGNAL NAME:
MFOV TO TEU (ACY) MFOV CMD (ACZ)
MEMORY LOCATION: 001245
MEMORY DATA BIT(S):
13
(BINARY)
CONDITION:
(None)
SIGNAL FUNCTION:
Indicates MFOV selected.
REMARKS: From FCC through LH FAB MRTU Type I to TEU.
PASS:
Location of fault if third digit on HOD is 1, 3, 5, or 7: troubleshoot TADS NSA
(TM 1–1270–476–T).
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).
15–208 SIGNAL NAME:
NFOV SWITCH
MEMORY LOCATION: 000436
MEMORY DATA BIT(S):
8
(BINARY)
CONDITION:
(None)
SIGNAL FUNCTION:
Selects narrow field of view (NFOV).
REMARKS: From ORT lefthand grip through CPG MRTU Type III to FCC.
PASS:
If fourth digit on HOD is 1, 2, or 3, go to paragraph 15–209.
FAIL: Location of fault: ORT lefthand grip, wiring from ORT to CPG MRTU Type III, CPG MRTU Type
III. Troubleshoot wiring to isolate fault (TM 1–1270–476–T).
15–209 SIGNAL NAME:
NFOV TO TEU (ACY) NFOV CMD (ACZ)
MEMORY LOCATION: 001245
MEMORY DATA BIT(S):
14
(BINARY)
CONDITION:
(None)
SIGNAL FUNCTION:
Indicates NFOV selected.
REMARKS: From FCC through LH FAB MRTU Type I to TEU.
PASS:
Location of fault if second digit on HOD is 4, 5, 6, or 7: troubleshoot TADS NSA
(TM 1–1270–476–T).
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).
15–210 SIGNAL NAME:
ZFOV SWITCH
MEMORY LOCATION: 000436
MEMORY DATA BIT(S):
11
(BINARY)
CONDITION:
(None)
SIGNAL FUNCTION:
Indicates zoom field of view (ZFOV) selected.
REMARKS: From ORT lefthand grip through CPG MRTU Type III to FCC.
PASS:
If third digit on HOD is 1, 2, or 3, go to 15–211.
FAIL: Location of fault: ORT lefthand grip, wiring from ORT to CPG MRTU Type III, CPG MRTU Type
III. Troubleshoot wiring to isolate fault (TM 1–1270–476–T).
15–211 SIGNAL NAME:
DTV ZOOM CONTROL (ACY) TV ZOOM CMD (ACZ)
MEMORY LOCATION: 000562
MEMORY DATA BIT(S):
11
(BINARY)
CONDITION:
(None)
SIGNAL FUNCTION:
Indicates DTV ZFOV switch setting.
REMARKS: From FCC through CPG MRTU Type III to TADS turret.
PASS:
If third digit on HOD is 1, 2, or 3, go to paragraph 15–212.
FAIL: Location of fault: CPG MRTU Type III, wiring from CPG MRTU Type III to TADS turret, wiring
from TADS turret to DTV. Troubleshoot wiring to isolate fault (TM 1–1270–476–T).
