TM 1–1520–238–T–3
Change 4
3–15
3–62 SIGNAL NAME:
AD REF VOLTAGE FAIL (ACY) ADA REF STAT (ACZ)
MEMORY LOCATION: 002103
MEMORY DATA BIT(S):
16
(BINARY)
CONDITION:
(None)
SIGNAL FUNCTION:
Indicates status of one of analog–to–digital converters during a DASEC internal
wraparound test.
REMARKS: From DASEC to FCC.
PASS:
If second digit displayed on HOD is 0, 2, 4, or 6, go to paragraph 3–63.
FAIL: Location of fault: replace DASEC (TM 1–1520–238–23).
3–63 SIGNAL NAME:
HARS INPUT NOT CHANGING (ACY) HARS DATA STAT (ACZ)
MEMORY LOCATION: 002103
MEMORY DATA BIT(S):
17
(BINARY)
CONDITION:
(None)
SIGNAL FUNCTION:
Indicates status of HARS input data.
REMARKS: From DASEC to FCC.
PASS:
If first digit displayed on HOD is 0, 1, 2, or 3, go to paragraph 3–64.
FAIL: Location of fault: refer to Chapter 6, paragraph 6–14.
3–64 SIGNAL NAME:
COLL WRAPAROUND DISCRETE (ACY) COLL WRAP STAT (ACZ)
MEMORY LOCATION: 002103
MEMORY DATA BIT(S):
18
(BINARY)
CONDITION:
(None)
SIGNAL FUNCTION:
Indicates status of DASEC collective (vertical) servoactuator drive digital
interface signal.
REMARKS: From DASEC to FCC.
PASS:
If first digit displayed on HOD is 0 or 1, go to paragraph 3–65.
FAIL: Location of fault: replace DASEC (TM 1–1520–238–23).
3–65 SIGNAL NAME:
YAW WRAPAROUND DISCRETE (ACY) YAW WRAP STAT (ACZ)
MEMORY LOCATION: 002103
MEMORY DATA BIT(S):
19
(BINARY)
CONDITION:
(None)
SIGNAL FUNCTION:
Indicates status of DASEC tail rotor actuator drive digital interface signal.
REMARKS: From DASEC to FCC.
PASS:
If first digit displayed on HOD is 0, go to paragraph 3–66.
FAIL: Location of fault: replace DASEC (TM 1–1520–238–23).
3–66 SIGNAL NAME:
ROLL WRAPAROUND DISC INVALID (ACY) ROLL WRAP STAT (ACZ)
MEMORY LOCATION: 002104
MEMORY DATA BIT(S):
4
(BINARY)
CONDITION:
(None)
SIGNAL FUNCTION:
Indicates status of DASEC lateral (roll) servoactuator drive digital interface
signal.
REMARKS: From DASEC to FCC.
PASS:
If sixth digit displayed on HOD is 0, go to paragraph 3–67.
FAIL: Location of fault: replace DASEC (TM 1–1520–238–23).
