TM 1–1520–238–T–3
6–4
Change 4
6–10 SIGNAL NAME:
HARS SD STATUS (ACY) HARS COM STAT (ACZ)
MEMORY LOCATION: 002154
MEMORY DATA BIT(S):
4
(BINARY)
CONDITION:
(None)
SIGNAL FUNCTION:
Indicates status of HARS serial data is GO.
REMARKS: From HARS through DASEC to FCC.
PASS:
If sixth digit on HOD is 0, go to paragraph 6–11.
FAIL: Location of fault: HARS, wiring from HARS to DASEC, DASEC. Troubleshoot wiring to isolate
fault (TM 11–1520–238–23–2).
6–11 SIGNAL NAME:
SUSPEND ALIGN CMD
MEMORY LOCATION: 002235
MEMORY DATA BIT(S):
5
(BINARY)
CONDITION:
(None)
SIGNAL FUNCTION:
Indicates FCC has not directed the HARS to stop alignment.
REMARKS: From FCC through DASEC to HARS.
PASS:
If fifth digit on HOD is 0, 1, 2, or 3, go to paragraph 6–13.
FAIL: Location of fault: go to paragraph 6–12.
6–12 SIGNAL NAME:
HARS RATES EXCESSIVE (ACY) HARS PRE HI RATES (ACZ)
MEMORY LOCATION: 002154
MEMORY DATA BIT(S):
8
(BINARY)
CONDITION:
(None)
SIGNAL FUNCTION:
Indicates a problem in HARS ability to control gyro outputs.
REMARKS: From HARS through DASEC to FCC.
PASS:
If fourth digit on HOD is 0, 1, 2, or 3, go to paragraph 6–13.
FAIL: Location of fault: HARS, wiring from HARS to DASEC, DASEC. Troubleshoot wiring to isolate
fault (TM 11–1520–238–23–2).
6–13 SIGNAL NAME:
HARS RATE STATUS (ACY) HARS FLTCTRL STAT (ACZ)
MEMORY LOCATION: 002154
MEMORY DATA BIT(S):
15
(BINARY)
CONDITION:
(None)
SIGNAL FUNCTION:
Used by DASEC as a valid rate input signal for DASEC control processing.
REMARKS: From HARS through DASEC to FCC.
PASS:
If second digit on HOD is 0, 1, 4, or 5, go to paragraph 6–14.
FAIL: Location of fault: HARS, wiring from HARS to DASEC, DASEC. Troubleshoot wiring to isolate
fault (TM 11–1520–238–23–2).
6–14 SIGNAL NAME:
HARS DATA VALID
MEMORY LOCATION: 002154
MEMORY DATA BIT(S):
5
(BINARY)
CONDITION:
(None)
SIGNAL FUNCTION:
Indicates HARS outputs are valid.
REMARKS: From HARS through DASEC to FCC.
PASS:
If fifth digit on HOD is 4, 5, 6, or 7, go to paragraph 6–15.
FAIL: Location of fault: HARS, wiring from HARS to DASEC, DASEC. Troubleshoot wiring to isolate
fault (TM 11–1520–238–23–2).
