TM 1–1520–238–T–3
15–46
Change 4
15–198 SIGNAL NAME:
LONG VEL TO TEU (ACY) LONG VEL AID (ACZ)
MEMORY LOCATION: 001224
MEMORY DATA BIT(S):
4–19 (ACY) 4–15 (ACZ)
(SCALAR)
CONDITION:
Monitor HOD; memory location response should increase with an increase of velocity
and decrease with a decrease in velocity.
SIGNAL FUNCTION:
Contains tracking computations information.
REMARKS: From FCC through LH FAB MRTU Type I to TEU.
PASS:
If CONDITION corresponds to correct indication, go to paragraph 15–199.
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).
15–199 SIGNAL NAME:
LAT VEL TO TEU (ACY) LAT VEL AID (ACZ)
MEMORY LOCATION: 001225
MEMORY DATA BIT(S):
4–19 (ACY) 4–15 (ACZ)
(SCALAR)
CONDITION:
Monitor HOD; memory location response should increase with an increase of velocity
and decrease with a decrease in velocity.
SIGNAL FUNCTION:
Contains tracking computations information.
REMARKS: From FCC through LH FAB MRTU Type I to TEU.
PASS:
If CONDITION corresponds to correct indication, go to paragraph 15–200.
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).
15–200 SIGNAL NAME:
NORM VEL TO TEU (ACY) NORM VEL AID (ACZ)
MEMORY LOCATION: 001226
MEMORY DATA BIT(S):
4–19 (ACY) 4–15 (ACZ)
(SCALAR)
CONDITION:
Monitor HOD; memory location response should increase with an increase of velocity
and decrease with a decrease in velocity.
SIGNAL FUNCTION:
Contains tracking computations information.
REMARKS: From FCC through LH FAB MRTU Type I to TEU.
PASS:
If CONDITION corresponds to correct indication, go to paragraph 15–201.
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).
15–201 SIGNAL NAME:
LT AUTO SEARCH TO TEU (ACY) LST AUTO CMD (ACZ)
MEMORY LOCATION: 001244
MEMORY DATA BIT(S):
5
(BINARY)
CONDITION:
(None)
SIGNAL FUNCTION:
Indicates auto search selected.
REMARKS: From FCC through LH FAB MRTU Type I to TEU.
PASS:
Location of fault if fifth digit on HOD is 4, 5, 6, or 7: replace TEU (TM 1–1270–476–20).
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).
