TM 1–1520–238–T–3
8–226
Change 4
8–854 SIGNAL NAME:
P4M1 UNLATCH INDICATE
MEMORY LOCATION: 002074
MEMORY DATA BIT(S):
18
(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 first digit displayed on HOD is 0, 1, 4, or 5, 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,
FCC. Troubleshoot wiring to isolate fault (TM 9–1230–476–20–2).
8–855 SIGNAL NAME:
P4M1 UPPER LOWER DISPLAY STATUS (ACY) P4M1 PRIORITY IND (ACZ)
MEMORY LOCATION: 001357
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 8–856.
FAIL: Location of fault: replace RHE (TM 9–1427–475–20).
8–856 SIGNAL NAME:
P4M1 TYPE STATUS DISPLAY (ACY) P4M1 TYPE (ACZ)
MEMORY LOCATION: 001357
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 8–857.
FAIL: Location of fault: RHE, wiring from RHE to ECSP, ECSP. Troubleshoot wiring to isolate fault
(TM 9–1427–475–20).
8–857 SIGNAL NAME:
P4M1 TYPE (ACY) P4M1 MSL TYPE (ACZ)
MEMORY LOCATION: 001432
MEMORY DATA BIT(S):
7–8
(BINARY)
CONDITION:
If fifth digit displayed on HOD is 0, and fourth digit displayed on HOD is 0, 1, 2, or
3=TRAINING
If fifth digit displayed on HOD is 1, and fourth digit displayed on HOD is 0, 1, 2, or
3=TACTICAL
If fifth digit displayed on HOD is 1, and fourth digit displayed on HOD is 4, 5, 6, or
7=NONE
SIGNAL FUNCTION:
Indicates a tactical, training or no missile at location.
REMARKS: From ECSP to RHE.
PASS:
If CONDITION corresponds to installed type of missiles, go to paragraph 8–858.
FAIL: Location of fault: replace right outboard launcher (TM 9–1425–475–30–2).
