TM 1–1520–238–T–3
8–154
Change 4
8–575 SIGNAL NAME:
LCHR2 AUTO SEEKER AZ (ACY) P2 RMT SKREL CMD (ACZ)
MEMORY LOCATION: 001741
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 missile analog signal to launcher from FCC.
REMARKS: From FCC through left inboard MRTU Type II to launcher.
PASS:
If CONDITION corresponds to correct response, go to paragraph 8–576.
FAIL: Location of fault: left inboard MRTU Type II, wiring from left inboard MRTU Type II to FCC.
Troubleshoot wiring to isolate fault (TM 9–1230–476–20–2).
8–576 SIGNAL NAME:
LCHR2 CONTROL MSL AUTO EL SIGNAL SELECT (ACY)
P2 2ND TRKG MSLEL (ACZ)
MEMORY LOCATION: 001325
MEMORY DATA BIT(S):
10–13
(HEX)
CONDITION:
If third digit displayed on HOD is 0=M1EL
If third digit displayed on HOD is 1=M2EL
If third digit displayed on HOD is 2=M3EL
If third digit displayed on HOD is 3=M4EL
If third digit displayed on HOD is 4=M1BIT3
If third digit displayed on HOD is 5=M2BIT3
If third digit displayed on HOD is 6=M3BIT3
If third digit displayed on HOD is 7=M4BIT3
If fourth digit displayed on HOD is 1, 3, 5, or 7 and third digit
displayed is 4=M1GCBIT
If fourth digit displayed on HOD is 1, 3, 5, or 7 and third digit
displayed is 5=M2GCBIT
If fourth digit displayed on HOD is 1, 3, 5, or 7 and third digit
displayed is 6=M3GCBIT
If fourth digit displayed on HOD is 1, 3, 5, or 7 and third digit
displayed is 7=M4GCBIT
SIGNAL FUNCTION:
Selects one of four missiles to be monitored for pitch gimbal angle (EL), BIT 3
or missile BIT 3 response on analog reply number three.
REMARKS: From RHE to ECSP to missile.
PASS:
If CONDITION corresponds to selected missile, go to paragraph 8–577.
FAIL: Location of fault: RHE, wiring from RHE to ECSP, ECSP, wiring from ECSP to missile, missile.
Troubleshoot wiring to isolate fault (TM 9–1427–475–20).
8–577 SIGNAL NAME:
LCHR2 AUTO SEEKER EL (ACY) P2 2ND TRKG MSLAZ (ACZ)
MEMORY LOCATION: 001502
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 RHE.
REMARKS: From launcher to RHE.
PASS:
If CONDITION corresponds to correct response, go to paragraph 8–578.
FAIL: Location of fault: left inboard launcher, wiring from left inboard launcher to RHE, RHE.
Troubleshoot wiring to isolate fault (TM 9–1427–475–20).
