RH FAB MRTU TYPE I INPUT BIT STATUS

RH FAB MRTU TYPE I STATUS WORD BBC STATUS BIT

TM-1-1520-238-T-3 Army Model AH-64 Helicopter (NSN
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TM 1–1520–238–T–3 9–9 9–34 SIGNAL NAME: RH FAB MRTU TYPE I INPUT BIT STATUS MEMORY LOCATION: 001517 MEMORY DATA BIT(S): 14 (BINARY) CONDITION: (None) SIGNAL FUNCTION: Indicates status of turn–on test of input circuitry. REMARKS: From RH FAB MRTU Type I to FCC. PASS: If second digit on HOD is 7, go to paragraph 9–35. FAIL: Location of fault: MUX FAB R circuit breaker, wiring from MUX FAB R circuit breaker to RH FAB MRTU Type I, RH FAB MRTU Type I. Troubleshoot wiring to isolate fault (TM 9–1230–476–20–2). 9–35 SIGNAL NAME: RH FAB MRTU TYPE I A/D BIT STATUS MEMORY LOCATION: 001517 MEMORY DATA BIT(S): 13 (BINARY) CONDITION: (None) SIGNAL FUNCTION: Indicates self–test status of analog to digital converter. REMARKS: From RH FAB MRTU Type I to FCC. PASS: If third digit on HOD is 1, go to paragraph 9–36. FAIL: Location of fault: MUX FAB R circuit breaker, wiring from MUX FAB R circuit breaker to RH FAB MRTU Type I, RH FAB MRTU Type I. Troubleshoot wiring to isolate fault (TM 9–1230–476–20–2). 9–36 SIGNAL NAME: RH FAB MRTU TYPE I SERIAL DIGITAL ERROR MEMORY LOCATION: 001517 MEMORY DATA BIT(S): 10 (BINARY) CONDITION: (None) SIGNAL FUNCTION: Monitors integrated helmet and display sight system (IHADSS). REMARKS: From RH FAB MRTU Type I to FCC. PASS: If fourth digit on HOD is 0, go to paragraph 9–37. FAIL: Location of fault: go to Chapter 7, paragraph 7–3. 9–37 SIGNAL NAME: RH FAB MRTU TYPE I SERIAL DIGITAL ERROR MEMORY LOCATION: 001561 MEMORY DATA BIT(S): 10 (BINARY) CONDITION: (None) SIGNAL FUNCTION: Monitors IHADSS. REMARKS: From RH FAB MRTU Type I to FCC. PASS: If fourth digit on HOD is 0, go to paragraph 9–38. FAIL: Location of fault: go to Chapter 7, paragraph 7–3. 9–38 SIGNAL NAME: RH FAB MRTU TYPE I SERIAL DIGITAL ERROR MEMORY LOCATION: 001633 MEMORY DATA BIT(S): 10 (BINARY) CONDITION: (None) SIGNAL FUNCTION: Monitors IHADSS. REMARKS: From RH FAB MRTU Type I to FCC. PASS: If fourth digit on HOD is 0, go to paragraph 9–39. FAIL: Location of fault: go to Chapter 7, paragraph 7–3.

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