TM 1–1520–238–T–3
8–275
8–1044 SIGNAL NAME:
P4M4 MSL TGT POLARITY CONTROL
MEMORY LOCATION: 001302
MEMORY DATA BIT(S):
10–11
(BINARY)
CONDITION:
If the fourth digit is 0, 2, 4, or 6 and the third digit is 0, 1, 2, 3=BLACK
If the fourth digit is 0, 2, 4, or 6 and the third digit is 4, 5, 6, 7=AUTO
If the fourth digit is 1, 3, 5, or 7 and the third digit is 0, 1, 2, 3=WHITE
SIGNAL FUNCTION:
Directs missile seeker to track a black target on a white background, a white
target on a black background or automatic contrast.
REMARKS: From RHE to ECSP.
PASS:
If third digit on HOD corresponds to proper polarity, go to paragraph 8–1045.
FAIL: Location of fault: RHE, wiring from RHE to ECSP, ECSP. Troubleshoot wiring to isolate fault
(TM 9–1427–475–20).
8–1045 SIGNAL NAME:
P4M4 MSL TGT POLARITY CONTROL
MEMORY LOCATION: 002064
MEMORY DATA BIT(S):
10–11
(BINARY)
CONDITION:
If the fourth digit is 0, 2, 4, or 6 and the third digit is 0, 1, 2, 3=BLACK
If the fourth digit is 0, 2, 4, or 6 and the third digit is 4, 5, 6, 7=AUTO
If the fourth digit is 1, 3, 5, or 7 and the third digit is 0, 1, 2, 3=WHITE
SIGNAL FUNCTION:
Directs missile seeker to track a black target on a white background, a white
target on a black background or automatic contrast.
REMARKS: From launcher through right outboard MRTU Type II to FCC.
PASS:
If third digit on HOD corresponds to proper polarity, refer to failure symptom index and next
failure symptom paragraph.
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).
8–1046 SIGNAL NAME:
P4M4 MSL BIT CMD
MEMORY LOCATION: 001302
MEMORY DATA BIT(S):
12
(BINARY)
CONDITION:
(None)
SIGNAL FUNCTION:
Controls launcher BIT.
REMARKS: From RHE to ECSP.
PASS:
If third digit on HOD is 0, 1, 4, or 5, go to paragraph 8–1047.
FAIL: Location of fault: RHE, wiring from RHE to ECSP, ECSP. Troubleshoot wiring to isolate fault
(TM 9–1427–475–20).
8–1047 SIGNAL NAME:
P4M4 MSL BIT CMD
MEMORY LOCATION: 002064
MEMORY DATA BIT(S):
12
(BINARY)
CONDITION:
(None)
SIGNAL FUNCTION:
Controls launcher BIT.
REMARKS: From launcher through right outboard MRTU Type II to FCC.
PASS:
If third digit on HOD is 0, 1, 4, or 5, go to paragraph 8–1048.
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).
