P4M2 MSL SEEKER SLAVE CMD

TM-1-1520-238-T-3 Army Model AH-64 Helicopter (NSN
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TM 1–1520–238–T–3 8–248 8–939 SIGNAL NAME: P4M2 MSL SEEKER SLAVE CMD MEMORY LOCATION: 002066 MEMORY DATA BIT(S): 17 (BINARY) CONDITION: (None) SIGNAL FUNCTION: Commands laser seeker to enter slave mode. REMARKS: From launcher through right outboard MRTU Type II to FCC. PASS: If first digit on HOD is 4, 5, 6, or 7, go to paragraph 8–946. 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). 8–940 SIGNAL NAME: P4M2 MSL STARE TRACK CMD MEMORY LOCATION: 001304 MEMORY DATA BIT(S): 18 (BINARY) CONDITION: (None) SIGNAL FUNCTION: Commands laser seeker to enter stare mode. If proper laser code is detected in seeker FOV, seeker will enter track mode. REMARKS: From RHE to ECSP. PASS: If first digit on HOD is 2, 3, 6, or 7, go to paragraph 8–941. FAIL: Location of fault: RHE, wiring from RHE to ECSP, ECSP. Troubleshoot wiring to isolate fault (TM 9–1427–475–20). 8–941 SIGNAL NAME: P4M2 MSL STARE TRACK CMD MEMORY LOCATION: 002066 MEMORY DATA BIT(S): 18 (BINARY) CONDITION: (None) SIGNAL FUNCTION: Commands laser seeker to enter stare mode. If proper laser code is detected in seeker FOV, seeker will enter track mode. REMARKS: From launcher through right outboard MRTU Type II to FCC. PASS: If first digit on HOD is 2, 3, 6, or 7, 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). 8–942 SIGNAL NAME: P4M2 MSL CORRELATE MEMORY LOCATION: 001431 MEMORY DATA BIT(S): 16 (BINARY) CONDITION: (None) SIGNAL FUNCTION: Indicates laser has detected a laser beam whose laser code agrees with internal stored code. REMARKS: From ECSP to RHE. PASS: If second digit on HOD is 1, 3, 5, or 7, go to paragraph 8–943. FAIL: Location of fault: replace right outboard launcher (TM 9–1425–475–30–2).

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