TM 1–1520–238–T–3
Change 4
15–51
15–221 SIGNAL NAME:
TADS J DIR COS
MEMORY LOCATION: 001130
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 pitch movement.
SIGNAL FUNCTION:
Contains pitch LOS information.
REMARKS: From TEU through LH FAB MRTU Type I to FCC.
PASS:
If CONDITION corresponds to correct pitch component of LOS data, go to paragraph 15–222.
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).
15–222 SIGNAL NAME:
TADS K DIR COS
MEMORY LOCATION: 001131
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 azimuth movement.
SIGNAL FUNCTION:
Contains azimuth LOS information.
REMARKS: From TEU through LH FAB MRTU Type I to FCC.
PASS:
If CONDITION corresponds to correct azimuth component of LOS data, go to
paragraph 15–223.
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).
15–223 SIGNAL NAME:
TADS ELEVATION LIMIT
MEMORY LOCATION: 001135
MEMORY DATA BIT(S):
16
(BINARY)
CONDITION:
(None)
SIGNAL FUNCTION:
Indicates TADS has been driven to upper or lower gimbal limit.
REMARKS: From TEU through LH FAB MRTU Type I to FCC.
PASS:
If second digit on HOD is 2, 4, or 6, go to paragraph 15–224.
FAIL: Location of fault: azimuth gimbal assembly, wiring from azimuth gimbal assembly to TEU, 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).
15–224 SIGNAL NAME:
TADS AZIMUTH LIMIT
MEMORY LOCATION: 001135
MEMORY DATA BIT(S):
17
(BINARY)
CONDITION:
(None)
SIGNAL FUNCTION:
Indicates TADS has been driven to left or right gimbal limit.
REMARKS: From TEU through LH FAB MRTU Type I to FCC.
PASS:
If first digit on HOD is 1, 2, or 3, go to paragraph 15–225.
FAIL: Location of fault: azimuth gimbal assembly, wiring from azimuth gimbal assembly to TEU, 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).
