TM 1–1520–238–T–3
Change 4
15–47
15–202 SIGNAL NAME:
LMC SWITCH
MEMORY LOCATION: 000441
MEMORY DATA BIT(S):
4
(BINARY)
CONDITION:
(None)
SIGNAL FUNCTION:
Indicates linear motion compensation selected.
REMARKS: From ORT lefthand grip through CPG MRTU Type III to FCC.
PASS:
If sixth digit on HOD is 0, go to paragraph 15–203.
FAIL: Location of fault: ORT LH grip, ORT, wiring from ORT to CPG MRTU Type III, CPG MRTU Type
III. Troubleshoot wiring to isolate fault (TM 1–1270–476–T).
15–203 SIGNAL NAME:
LMC ON TO TEU (ACY) LMC ON CMD (ACZ)
MEMORY LOCATION: 001244
MEMORY DATA BIT(S):
10
(BINARY)
CONDITION:
(None)
SIGNAL FUNCTION:
Indicates linear motion compensation selected.
REMARKS: From FCC through LH FAB MRTU Type I to TEU.
PASS:
Location of fault if fourth digit on HOD is 1, 3, 5, or 7: troubleshoot TADS boresight assembly
(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).
15–204 SIGNAL NAME:
WFOV SWITCH
MEMORY LOCATION: 000436
MEMORY DATA BIT(S):
6
(BINARY)
CONDITION:
(None)
SIGNAL FUNCTION:
Selects wide field of view (WFOV).
REMARKS: From ORT lefthand grip through CPG MRTU Type III to FCC.
PASS:
If fifth digit on HOD is 1, 4, or 5, go to paragraph 15–205.
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).
15–205 SIGNAL NAME:
WFOV TO TEU (ACY) WFOV CMD (ACZ)
MEMORY LOCATION: 001245
MEMORY DATA BIT(S):
12
(BINARY)
CONDITION:
(None)
SIGNAL FUNCTION:
Indicates WFOV selected.
REMARKS: From FCC through LH FAB MRTU Type I to TEU.
PASS:
Location of fault if third digit on HOD is 2, 3, 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).
15–206 SIGNAL NAME:
MFOV SWITCH
MEMORY LOCATION: 000436
MEMORY DATA BIT(S):
7
(BINARY)
CONDITION:
(None)
SIGNAL FUNCTION:
Selects medium field of view (MFOV).
REMARKS: From ORT lefthand grip through CPG MRTU Type III to FCC.
PASS:
If fifth digit on HOD is 2, 4, or 6, go to paragraph 15–207.
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).
