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DASEC STATUS WORD OUTPUT CLEAR | Up
TM-1-1520-238-T-3 Army Model AH-64 Helicopter (NSN
1520-01-106-9519) (EIC: RHA) Multiplex Read Codes Manual | Next
COLL SAS SOL DISC INVALID (ACY) CLTV SAS SOL STAT (ACZ) |
TM 1–1520–238–T–3
Change 4
3–13
3–53 SIGNAL NAME:
DASEC STATUS WORD ASE BIT (ACY) DASE BIT STATUS (ACZ)
MEMORY LOCATION: 002240
MEMORY DATA BIT(S):
11
(BINARY)
CONDITION:
(None)
SIGNAL FUNCTION:
Indicates last FD/LS test ASE bit status.
REMARKS: From FCC to DASEC.
PASS:
If third digit displayed on HOD is 1, go to paragraph 3–54.
FAIL: Location of fault: replace DASEC (TM 1–1520–238–23).
3–54 SIGNAL NAME:
DASEC STATUS WORD SERIAL DIGITAL ERROR (ACY) S/D ERROR (ACZ)
MEMORY LOCATION: 002240
MEMORY DATA BIT(S):
10
(BINARY)
CONDITION:
(None)
SIGNAL FUNCTION:
Indicates HARS ability to acknowledge whether an error has been flagged.
REMARKS: From FCC to DASEC.
PASS:
If fourth digit displayed on HOD is 0, 2, 4, or 6, go to paragraph 3–55.
FAIL: Location of fault: replace DASEC (TM 1–1520–238–23).
3–55 SIGNAL NAME:
HARS SUBSYSTEM (ACY) HARS READY IND (ACZ)
MEMORY LOCATION: 002103
MEMORY DATA BIT(S):
5
(BINARY)
CONDITION:
(None)
SIGNAL FUNCTION:
Indicates status of HARS.
REMARKS: From DASEC to FCC.
PASS:
If fifth digit displayed on HOD is 0, 1, 2, or 3, go to paragraph 3–56.
FAIL: Location of fault: refer to Chapter 6, paragraph 6–8.
3–56 SIGNAL NAME:
ROM CHECKSUM
MEMORY LOCATION: 002103
MEMORY DATA BIT(S):
6
(BINARY)
CONDITION:
(None)
SIGNAL FUNCTION:
Indicates status of DASEC read only memory (ROM) check.
REMARKS: From DASEC to FCC.
PASS:
If fifth digit displayed on HOD is 0 or 1, go to paragraph 3–57.
FAIL: Location of fault: replace DASEC (TM 1–1520–238–23).
3–57 SIGNAL NAME:
26 VAC REF A & B (ACY) 26VAC STAT (ACZ)
MEMORY LOCATION: 002103
MEMORY DATA BIT(S):
7
(BINARY)
CONDITION:
(None)
SIGNAL FUNCTION:
Indicates status of 26 VAC output from T1 and T2.
REMARKS: From DASEC to FCC.
PASS:
If fifth digit displayed on HOD is 0, go to paragraph 3–58.
FAIL: Location of fault: go to paragraph 3–97.
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