TM 1–1520–238–T–3
8–256
Change 4
8–971 SIGNAL NAME:
P4M3 UNLATCH INDICATE
MEMORY LOCATION: 002051
MEMORY DATA BIT(S):
16
(BINARY)
CONDITION:
(None)
SIGNAL FUNCTION:
Indicates to operator when a missile is unlatched.
REMARKS: From launcher through right outboard MRTU Type II to FCC for display.
PASS:
If second digit displayed on HOD is 0, 2, 4, or 6, go to paragraph 8–972.
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).
8–972 SIGNAL NAME:
P4M3 UNLATCH INDICATE
MEMORY LOCATION: 002074
MEMORY DATA BIT(S):
16
(BINARY)
CONDITION:
(None)
SIGNAL FUNCTION:
Indicates to operator when a missile is unlatched.
REMARKS: From FCC through right outboard MRTU Type II to launcher.
PASS:
If second digit displayed on HOD is 0, 2, 4, or 6, refer to failure symptom index and next
failure symptom paragraph.
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).
8–973 SIGNAL NAME:
P4M3 UPPER LOWER DISPLAY STATUS (ACY) P4M3 PRIORITY IND (ACZ)
MEMORY LOCATION: 001360
MEMORY DATA BIT(S):
16
(BINARY)
CONDITION:
If the second digit displayed on HOD is 0, 2, 4, or 6=UPPER
If the second digit displayed on HOD is 1, 3, 5, or 7=LOWER
SIGNAL FUNCTION:
Indicates to operator when a selected missile has been assigned to upper or
lower channel.
REMARKS: From RHE to FCC for display.
PASS:
If CONDITION corresponds to selected channel, go to paragraph 8–974.
FAIL: Location of fault: replace RHE (TM 9–1427–475–20).
8–974 SIGNAL NAME:
P4M3 TYPE STATUS DISPLAY (ACY) P4M3 TYPE (ACZ)
MEMORY LOCATION: 001360
MEMORY DATA BIT(S):
17–19
(OCTAL)
CONDITION:
If the first digit displayed on HOD is 0=NONE
If the first digit displayed on HOD is 1=TACTICAL LASER
If the first digit displayed on HOD is 4=UNIDENTIFIED
If the first digit displayed on HOD is 5=TRAINING LASER
SIGNAL FUNCTION:
Provides type of missile data for display to operator.
REMARKS: From RHE to FCC for display.
PASS:
If CONDITION on HOD corresponds to installed type of missiles, go to paragraph 8–975.
FAIL: Location of fault: RHE, wiring from RHE to ECSP, ECSP. Troubleshoot wiring to isolate fault
(TM 9–1427–475–20).
