TM 1–1520–238–T–3
Change 4
8–301
8–1146 SIGNAL NAME:
CPG LOWER QUANTITY SW (ACY) CPG LOWER CHAN SW (ACZ)
MEMORY LOCATION: 000437
MEMORY DATA BIT(S):
10
(BINARY)
CONDITION:
(None)
SIGNAL FUNCTION:
Indicates CPG has selected lower channel to code.
REMARKS: From CPG FCP through CPG MRTU Type III to RHE.
PASS:
If fourth digit on HOD is 0, 1, 2, or 3, go to paragraph 8–1147.
FAIL: Location of fault: CPG FCP, wiring from CPG FCP to CPG MRTU Type III, CPG MRTU Type III.
Troubleshoot wiring to isolate fault (TM 9–1427–475–20).
8–1147 SIGNAL NAME:
MSL UPPER CHANNEL CODE SW
MEMORY LOCATION: 001074
MEMORY DATA BIT(S):
14–16
(OCTAL)
CONDITION:
If the first digit displayed on HOD is 0=H
If the first digit displayed on HOD is 1=G
If the first digit displayed on HOD is 2=F
If the first digit displayed on HOD is 3=E
If the first digit displayed on HOD is 4=D
If the first digit displayed on HOD is 5=C
If the first digit displayed on HOD is 6=B
If the first digit displayed on HOD is 7=A
SIGNAL FUNCTION:
Indicates laser code selection.
REMARKS: From CPG FCP through LH FAB MRTU TYPE I to RHE.
PASS:
If first digit on HOD corresponds to selected code, go to paragraph 8–1148.
FAIL: Location of fault: CPG FCP, wiring from CPG FCP to LH FAB MRTU Type I, LH FAB MRTU
Type I. Troubleshoot wiring to isolate fault (TM 9–1427–475–20).
8–1148 SIGNAL NAME:
MSL LOWER CHANNEL QUANTITY READY
MEMORY LOCATION: 001343
MEMORY DATA BIT(S):
14–15
(BINARY)
CONDITION:
If second digit displayed on HOD 0 or 4=0
If second digit displayed on HOD 1 or 5=1
If second digit displayed on HOD 2 or 6=2
If second digit displayed on HOD 3 or 7=3
SIGNAL FUNCTION:
Indicates how many missiles are ready and scanning on lower laser code.
REMARKS: From RHE to FCC.
PASS:
If CONDITION corresponds to selected missiles, go to paragraph 8–1149.
FAIL: Location of fault: replace RHE (TM 9–1427–475–20).
8–1149 SIGNAL NAME:
PILOT LOWER CHANNEL SW
MEMORY LOCATION: 001120
MEMORY DATA BIT(S):
5
(BINARY)
CONDITION:
(None)
REMARKS: Indicates pilot has selected lower channel to code.
SIGNAL FUNCTION:
From pilot missile control panel through LH FAB MRTU Type I to RHE.
PASS:
If fifth digit on HOD is 4, 5, 6, or 7, go to paragraph 8–1150.
FAIL: Location of fault: pilot missile control panel, wiring from pilot missile control panel to LH FAB
MRTU Type I, LH FAB MRTU Type I. Troubleshoot wiring to isolate fault (TM 9–1427–475–20).
