TM 1–1520–238–T–3
Change 4
15–15
15–52 SIGNAL NAME:
ORT LEVEL ADJ (ACY) CPG LEVEL ADJ (ACZ)
MEMORY LOCATION: 000434
MEMORY DATA BIT(S):
4–19 (ACY) 4–15 (ACZ)
(SCALAR)
CONDITION:
Monitor HOD while increasing level; memory location response should increase when
level is increased and decrease when level is decreased.
SIGNAL FUNCTION:
Adjusts forward looking infared radar (FLIR) level control.
REMARKS: From ORT through CPG MRTU Type III to FCC.
PASS:
If CONDITION is met, go to paragraph 15–53.
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).
15–53 SIGNAL NAME:
ORT LEVEL ADJ TO TEU (ACY) CPG LEVEL ADJ TST (ACZ)
MEMORY LOCATION: 001253
MEMORY DATA BIT(S):
4–19 (ACY) 4–15 (ACZ)
(SCALAR)
CONDITION:
Monitor HOD while increasing level; memory location response should increase when
level is increased and decrease when level is decreased.
SIGNAL FUNCTION:
Used during FD/LS.
REMARKS: From FCC through LH FAB MRTU Type I to TEU.
PASS:
If CONDITION is met, go to paragraph 15–54.
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).
15–54 SIGNAL NAME:
GAIN TO FLIR (ACY) FLIR GAIN CMD (ACZ)
MEMORY LOCATION: 000545
MEMORY DATA BIT(S):
4–19 (ACY) 4–15 (ACZ)
(SCALAR)
CONDITION:
Monitor HOD while increasing gain; memory location response should increase when
gain is increased and decrease when gain is decreased.
SIGNAL FUNCTION:
Used during FD/LS.
REMARKS: From FCC through CPG MRTU Type III to TEU.
PASS:
If CONDITION is met, go to paragraph 15–55.
FAIL: Location of fault: CPG MRTU Type III, wiring from CPG MRTU Type III to TADS turret, TADS
turret. Troubleshoot wiring to isolate fault (TM 1–1270–476–T).
15–55 SIGNAL NAME:
LEVEL TO FLIR (ACY) FLIR LEVEL CMD (ACZ)
MEMORY LOCATION: 000546
MEMORY DATA BIT(S):
4–19 (ACY) 4–15 (ACZ)
(SCALAR)
CONDITION:
Monitor HOD while increasing level; memory location response should increase when
level is increased and decrease when level is decreased.
SIGNAL FUNCTION:
Adjusts FLIR level.
REMARKS: From FCC through CPG MRTU Type III to TADS turret.
PASS:
Location of fault if CONDITION is met: troubleshoot ORT (TM 1–1270–476–T).
FAIL: Location of fault: CPG MRTU Type III, wiring from CPG MRTU Type III to TADS turret
assembly, TADS turret assembly. Troubleshoot wiring to isolate fault (TM 1–1270–476–T).
