TM 1–1520–238–T–3
Change 4
15–33
15–137 SIGNAL NAME:
IMPEND IAT BREAK LOCK
MEMORY LOCATION: 001135
MEMORY DATA BIT(S):
5
(BINARY)
CONDITION:
(None)
SIGNAL FUNCTION:
Indicates target is about to break lock–on.
REMARKS: From TEU through LH FAB MRTU Type I to FCC.
PASS:
If fifth digit on HOD is 1, 2, or 3, go to paragraph 15–138.
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).
15–138 SIGNAL NAME:
IAT BREAK LOCK
MEMORY LOCATION: 001135
MEMORY DATA BIT(S):
4
(BINARY)
CONDITION:
(None)
SIGNAL FUNCTION:
Indicates target has broken lock–on.
REMARKS: From TEU through LH FAB MRTU Type I to FCC.
PASS:
If sixth digit on HOD is 0, go to paragraph 15–139.
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).
15–139 SIGNAL NAME:
IAT OFFSET TO TEU (ACY) IAT OFFSET CMD (ACZ)
MEMORY LOCATION: 001244
MEMORY DATA BIT(S):
6
(BINARY)
CONDITION:
(None)
SIGNAL FUNCTION:
Indicates IAT OFFSET mode selected.
REMARKS: From FCC through LH FAB MRTU Type I to TEU.
PASS:
If fifth digit on HOD is 2, 3, 6, or 7, go to paragraph 15–140.
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).
15–140 SIGNAL NAME:
IAT BLK/WHT AUTO SWITCH
MEMORY LOCATION: 000413
MEMORY DATA BIT(S):
18–19
(BINARY)
CONDITION:
If first digit displayed on HOD is 1 or 5=BLACK
If first digit displayed on HOD is 2 or 6=WHITE
If first digit displayed on HOD is 3 or 7=AUTO
SIGNAL FUNCTION:
Selects polarity.
REMARKS: From ORT righthand grip through CPG MRTU Type III to FCC.
PASS:
If CONDITION corresponds to selected switch mode, go to paragraph 15–141.
FAIL: Location of fault: ORT RH grip, ORT, wiring from ORT to CPG MRTU Type III, CPG MRTU
Type III. Troubleshoot wiring to isolate fault (TM 1–1270–476–T).
