TM 1–1520–238–T–3
15–16
Change 4
15–56 SIGNAL NAME:
ORT RNG FOCUS ADJ (ACY) CPG FOCUS ADJ (ACZ)
MEMORY LOCATION: 000426
MEMORY DATA BIT(S):
4–19 (ACY) 4–15 (ACZ)
(SCALAR)
CONDITION:
Monitor HOD while increasing range focus; memory location response should increase
when range focus is increased and decrease when range focus is decreased.
SIGNAL FUNCTION:
Adjusts output of range focus.
REMARKS: From ORT through CPG MRTU Type III to FCC.
PASS:
If CONDITION is met, go to paragraph 15–57.
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).
15–57 SIGNAL NAME:
ORT RNG FOCUS ADJ TO TEU (ACY) RNG FOCUS ADJ TST (ACZ)
MEMORY LOCATION: 001255
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:
Location of fault if CONDITION is met: troubleshoot ORT (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).
15–58 SIGNAL NAME:
RNG FOCUS TO TV (ACY) TV FOCUS CMD (ACZ)
MEMORY LOCATION: 000547
MEMORY DATA BIT(S):
4–19 (ACY) 4–15 (ACZ)
(SCALAR)
CONDITION:
Monitor HOD while increasing range focus; memory location response should increase
when range focus is increased and decrease when range focus is decreased.
SIGNAL FUNCTION:
Adjusts focus of TV from infinity to 1.5 kilometers (KM).
REMARKS: From FCC through CPG MRTU Type III to TADS turret.
PASS:
If CONDITION is met, go to paragraph 15–59.
FAIL: Location of fault: CPG MRTU Type III, wiring from CPG MRTU Type III to TADS turret.
Troubleshoot wiring to isolate fault (TM 1–1270–476–T).
15–59 SIGNAL NAME:
RNG FOCUS TO FLIR (ACY) TV FOCUS CMD (ACZ)
MEMORY LOCATION: 000554
MEMORY DATA BIT(S):
4–19 (ACY) 4–15 (ACZ)
(SCALAR)
CONDITION:
Monitor HOD while increasing range focus; memory location response should increase
when range focus is increased and decrease when range focus is decreased.
SIGNAL FUNCTION:
Controls focus of TADS FLIR from infinity to 0.5 KM.
REMARKS: From FCC through CPG MRTU Type III to TADS turret.
PASS:
Location of fault if CONDITION is met: troubleshoot TADS night sensor (TM 1–1270–476–T).
FAIL: Location of fault: CPG MRTU, wiring from CPG MRTU to TADS turret, TADS turret.
Troubleshoot wiring to isolate fault (TM 1–1270–476–T).
