TM 1–1520–238–T–3
Change 4
15–11
15–34 SIGNAL NAME:
MRTU PARITY STATUS
MEMORY LOCATION: 001141
MEMORY DATA BIT(S):
5
(BINARY)
CONDITION:
(None)
SIGNAL FUNCTION:
Monitors serial data link.
REMARKS: From TEU through LH FAB MRTU Type I to FCC.
PASS:
If fifth digit on HOD is 0, 1, 2, or 3, go to paragraph 15–35.
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).
15–35 SIGNAL NAME:
MANCHESTER ERROR STATUS (ACY) MANCHESTER STAT (ACZ)
MEMORY LOCATION: 001141
MEMORY DATA BIT(S):
6
(BINARY)
CONDITION:
(None)
SIGNAL FUNCTION:
Indicates received data failure.
REMARKS: From TEU through LH FAB MRTU Type I to FCC.
PASS:
If fifth digit on HOD is 0, 1, 4, or 5, go to paragraph 15–36.
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).
15–36 SIGNAL NAME:
TADS COMPUTER STATUS (ACY) TADS CMPTR STAT (ACZ)
MEMORY LOCATION: 001136
MEMORY DATA BIT(S):
6
(BINARY)
CONDITION:
(None)
SIGNAL FUNCTION:
Indicates FD/LS TADS computer failure.
REMARKS: From TEU through LH FAB MRTU Type I to FCC.
PASS:
If fifth digit on HOD is 2, 3, 6, or 7, go to paragraph 15–235.
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).
15–37 SIGNAL NAME:
LASER STATUS (ACY) LRFD STAT (ACZ)
MEMORY LOCATION: 001136
MEMORY DATA BIT(S):
9
(BINARY)
CONDITION:
(None)
SIGNAL FUNCTION:
Indicates FD/LS laser rangefinder/designator (LRF/D) failure.
REMARKS: From TEU through LH FAB MRTU Type I to FCC.
PASS:
If fourth digit on HOD is 2, 3, 6, or 7, go to paragraph 15–38.
FAIL: Location of fault: TEU, wiring from TEU to laser electronic unit (LEU), LEU, wiring from LEU to
laser transceiver unit (LTU). Troubleshoot wiring to isolate fault (TM 1–1270–476–T).
15–38 SIGNAL NAME:
LASER ON TO TPS (ACY) LRFD CMD (ACZ)
MEMORY LOCATION: 001220
MEMORY DATA BIT(S):
19
(BINARY)
CONDITION:
(None)
SIGNAL FUNCTION:
Indicates CPG has turned TADS laser on.
REMARKS: From FCC through LH FAB MRTU Type I to TPS.
PASS:
If sixth digit on HOD is 1, 3, 5, or 7, go to paragraph 15–39.
FAIL: Location of fault: go to Chapter 16, paragraph 16–35.
