TM 1–1520–238–T–3
15–50
Change 4
15–217 SIGNAL NAME:
ORT UPDATE TO TEU (ACY) UPDATE SW TST (ACZ)
MEMORY LOCATION: 001252
MEMORY DATA BIT(S):
10
(BINARY)
CONDITION:
(None)
SIGNAL FUNCTION:
Indicates navigation UPDT switch is pressed.
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 TEU (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).
15–218 SIGNAL NAME:
ORT VIDEO REC SWITCH (ACY) RECORD SW (ACZ)
MEMORY LOCATION: 000441
MEMORY DATA BIT(S):
6
(BINARY)
CONDITION:
(None)
SIGNAL FUNCTION:
Allows CPG to turn video recorder on and off.
REMARKS: From ORT righthand grip through CPG MRTU Type III to FCC.
PASS:
If fifth digit on HOD is 1, 4, or 5, go to paragraph 15–219.
FAIL: Location of fault: ORT righthand grip, wiring from ORT to CPG MRTU Type III, CPG MRTU
Type III. Troubleshoot wiring to isolate fault (TM 1–1270–476–T).
15–219 SIGNAL NAME:
ORT VIDEO REC SW TO TEU (ACY) RCD SW TST (ACZ)
MEMORY LOCATION: 001252
MEMORY DATA BIT(S):
13
(BINARY)
CONDITION:
(None)
SIGNAL FUNCTION:
Turns video recorder on and OFF.
REMARKS: From FCC through LH FAB MRTU Type I to TEU.
PASS:
If third digit on HOD is 1, 3, 5, or 7, go to Chapter 21, paragraph 21–1.
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).
15–220 SIGNAL NAME:
TADS I DIR COS
MEMORY LOCATION: 001127
MEMORY DATA BIT(S):
4–19 (ACY) 4–15 (ACZ)
(SCALAR)
CONDITION:
Monitor HOD while in LOS operation; memory location response should increase and
decrease with LOS roll movement.
SIGNAL FUNCTION:
Contains roll LOS information.
REMARKS: From TEU through LH FAB MRTU Type I to FCC.
PASS:
If the CONDITION corresponds to correct roll component of LOS data, go to
paragraph 15–221.
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).
