TM 1–1520–238–T–3
Change 4
8–287
8–1092 SIGNAL NAME:
LCHR4 AUTO SEEKER EL (ACY) P4 2ND TRKG MSLEL (ACZ)
MEMORY LOCATION: 002040
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 8–1093.
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).
8–1093 SIGNAL NAME:
LCHR4 AUTO SEEKER EL (ACY) P4 AUTO SKREL CMD (ACZ)
MEMORY LOCATION: 002054
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:
If CONDITION corresponds to correct response, go to paragraph 8–1094.
FAIL: Location of fault: right outboard MRTU Type II, wiring from right outboard MRTU Type II to FCC,
FCC. Troubleshoot wiring to isolate fault (TM 9–1230–476–20–2).
8–1094 SIGNAL NAME:
LCHR4 CONTROL MSL REMOTE AZ SIGNAL SELECT (ACY)
P4 RMT AZSIG CMD (ACZ)
MEMORY LOCATION: 001312
MEMORY DATA BIT(S):
14–16
(OCTAL)
CONDITION:
If the second digit displayed on HOD is 0=M1AZ
If the second digit displayed on HOD is 1=M2AZ
If the second digit displayed on HOD is 2=M3AZ
If the second digit displayed on HOD is 3=M4AZ
If the second digit displayed on HOD is 4=M1BIT2
If the second digit displayed on HOD is 5=M2BIT2
If the second digit displayed on HOD is 6=M3BIT2
If the second digit displayed on HOD is 7=M4BIT2
SIGNAL FUNCTION:
Selects one of four missiles to be monitored for yaw gimbal angle or BIT 2
response on analog reply number two.
REMARKS: From RHE to ECSP to missile.
PASS:
If second digit on HOD corresponds to selected missile, go to paragraph 8–1095.
FAIL: Location of fault: replace RHE, wiring from RHE to ECSP, ECSP, wiring from ECSP to missile,
missile. Troubleshoot wiring to isolate fault (TM 9–1427–475–20).
8–1095 SIGNAL NAME:
LCHR4 REMOTE SEEKER AZ (ACY) P4 1ST TRKG MSLEL (ACZ)
MEMORY LOCATION: 001511
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 left and positive (sixth digit=0) when seeker is right.
SIGNAL FUNCTION:
Provides selected analog signal to RHE.
REMARKS: From launcher to RHE.
PASS:
If CONDITION corresponds to correct response, go to paragraph 8–1096.
FAIL: Location of fault: right outboard launcher, wiring from right outboard launcher to RHE, RHE.
Troubleshoot wiring to isolate fault (TM 9–1427–475–20).
