TM 1–1520–238–T–3
Change 4
8–289
8–1100 SIGNAL NAME:
LCHR4 REMOTE SEEKER EL (ACY) P4 1ST TRKG MSLEL (ACZ)
MEMORY LOCATION: 002042
MEMORY DATA BIT(S):
4–19 (ACY) 4–15 (ACZ)
(SCALAR)
CONDITION:
Monitor HOD; memory location response should indicate negative (sixth digit =1) when
the seeker is down and positive (sixth digit=0) when seeker is up.
SIGNAL FUNCTION:
Provides selected analog signal to FCC.
REMARKS: From launcher through right outboard MRTU Type II to FCC.
PASS:
If CONDITION corresponds to correct response, go to paragraph 8–1101.
FAIL: Location of fault: right outboard launcher, wiring from right outboard launcher to right outboard
MRTU Type II, right outboard MRTU Type II. Troubleshoot wiring to isolate fault
(TM 9–1427–475–20).
8–1101 SIGNAL NAME:
LCHR4 REMOTE SEEKER EL (ACY) P4 RMT SKREL (ACZ)
MEMORY LOCATION: 002060
MEMORY DATA BIT(S):
4–19 (ACY) 4–15 (ACZ)
(SCALAR)
CONDITION:
Monitor HOD; memory location response should indicate negative (sixth digit =1) when
the seeker is down and positive (sixth digit=0) when seeker is up.
SIGNAL FUNCTION:
Provides selected missile analog signal to launcher from FCC.
REMARKS: From FCC through right outboard MRTU Type II to launcher.
PASS:
Location of fault if CONDITION is met: wiring from remote controlled circuit breaker (RCCB) to
ECSP, ECSP. Troubleshoot wiring to isolate fault (TM 9–1427–475–20).
FAIL: Location of fault: right outboard MRTU Type II, wiring from right outboard MRTU Type II to FCC.
Troubleshoot wiring to isolate fault (TM 9–1230–476–20–2).
8–1102 SIGNAL NAME:
CPG MSL ARM
MEMORY LOCATION: 001075
MEMORY DATA BIT(S):
19
(BINARY)
CONDITION:
(None)
SIGNAL FUNCTION:
Selects missile arming.
REMARKS: From CPG FCP to RHE.
PASS:
If first digit displayed on HOD is 1, 3, 5, or 7, go to paragraph 8–1103.
FAIL: Location of fault: CPG FCP, wiring from CPG FCP to RHE. Troubleshoot wiring to isolate fault
(TM 9–1427–475–20).
8–1103 SIGNAL NAME:
PILOT MSL ARM
MEMORY LOCATION: 001120
MEMORY DATA BIT(S):
16
(BINARY)
CONDITION:
(None)
SIGNAL FUNCTION:
Selects missile arming.
REMARKS: From pilot FCP to RHE.
PASS:
If second digit displayed on HOD is 1, 3, 5, or 7, go to paragraph 8–1104.
FAIL: Location of fault: pilot FCP, wiring from pilot FCP to RHE. Troubleshoot wiring to isolate fault
(TM 9–1427–475–20).
8–1104 SIGNAL NAME:
MSL LAUNCHER ARM COMMAND (ACY) LCHR ARM IND (ACZ)
MEMORY LOCATION: 001440
MEMORY DATA BIT(S):
6
(BINARY)
CONDITION:
(None)
SIGNAL FUNCTION:
Indicates to RHE when launchers are armed.
REMARKS: From FCC to RHE.
PASS:
If fifth digit displayed on HOD is 2, 3, 6, or 7, go to paragraph 8–1105.
FAIL: Location of fault: replace RHE (TM 9–1427–475–20).
