TM 1–1520–238–T–3
Change 4
15–41
15–175 SIGNAL NAME:
ORT GUN WAS TO TEU (ACY) ORT GUN WAS TST (ACZ)
MEMORY LOCATION: 001252
MEMORY DATA BIT(S):
18
(BINARY)
CONDITION:
(None)
SIGNAL FUNCTION:
Indicates weapons inhibit.
REMARKS: From FCC through LH FAB MRTU Type I to TEU.
PASS:
If first digit on HOD is 0, 1, 4, or 5, go to paragraph 15–176.
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).
15–176 SIGNAL NAME:
ORT GUN TRIG TO TEU (ACY) ORT GUN TRIG TST (ACZ)
MEMORY LOCATION: 001252
MEMORY DATA BIT(S):
9
(BINARY)
CONDITION:
(None)
SIGNAL FUNCTION:
Indicates gun inhibit.
REMARKS: From FCC through LH FAB MRTU Type I to TEU.
PASS:
If fourth digit on HOD is 0, 1, 4, or 5, troubleshoot laser transceiver (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).
15–177 SIGNAL NAME:
ORT BRSIT ENABLE
MEMORY LOCATION: 000441
MEMORY DATA BIT(S):
5
(BINARY)
CONDITION:
(None)
SIGNAL FUNCTION:
Indicates CPG has selected elevation and azimuth adjustments.
REMARKS: From ORT through CPG MRTU Type III to FCC.
PASS:
If fifth digit on HOD is 1, 2, or 3, go to paragraph 15–178.
FAIL: Location of fault: ORT, wiring from ORT to CPG MRTU Type III, CPG MRTU Type III.
Troubleshoot wiring to isolate fault (TM 1–1270–476–T).
15–178 SIGNAL NAME:
BRSIT SW ERROR
MEMORY LOCATION: 001135
MEMORY DATA BIT(S):
9
(BINARY)
CONDITION:
(None)
SIGNAL FUNCTION:
Indicates input switch positions are generating inhibit.
REMARKS: From TEU through LH FAB MRTU Type I to FCC.
PASS:
If fourth digit on HOD is 1, 4, or 5, go to paragraph 15–179.
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).
15–179 SIGNAL NAME:
ORT THUMB ELEVATION RATE (ACY) ORT MAN EL RATE (ACZ)
MEMORY LOCATION: 000424
MEMORY DATA BIT(S):
4–19 (ACY) 4–15 (ACZ)
(SCALAR)
CONDITION:
Monitor HOD while increasing elevation; memory location response should increase
when elevation increases and decrease when elevation decreases.
SIGNAL FUNCTION:
Determines elevation slew rate.
REMARKS: From ORT through CPG MRTU Type III to FCC.
PASS:
If CONDITION corresponds to selected elevation, go to paragraph 15–180.
FAIL: Location of fault: ORT, wiring from ORT to CPG MRTU Type III, CPG MRTU Type III.
Troubleshoot wiring to isolate fault (TM 1–1270–476–T).
