TM 1–1520–238–T–3
21–6
Change 4
21–13 SIGNAL NAME:
VIDEO RECORDER EVENT DETECT (ACY) VCR EVENT MARK (ACZ)
MEMORY LOCATION: 002132
MEMORY DATA BIT(S):
7
(BINARY)
CONDITION:
(None)
SIGNAL FUNCTION:
Indicates video recorder has stopped at an event marker.
REMARKS: From video recorder through DASEC to FCC. An audio tone is generated.
PASS:
Location of fault if fifth digit displayed on HOD is 0, 2, 4, or 6: video recorder, wiring from video
recorder to DASEC, DASEC. Troubleshoot wiring to isolate fault (TM 11–1520–238–23–2).
FAIL: Location of fault: video recorder control panel, wiring from video recorder control panel to CPG
MRTU Type III, CPG MRTU Type III. Troubleshoot wiring to isolate fault
(TM 11–1520–238–23–2).
21–14 SIGNAL NAME:
VIDEO RECORDER END OF TAPE (ACY) VCR EOT (ACZ)
MEMORY LOCATION: 002132
MEMORY DATA BIT(S):
4
(BINARY)
CONDITION:
(NONE)
SIGNAL FUNCTION:
Indicates that video recorder is at end of tape (EOT).
REMARKS: From video recorder through DASEC to FCC. EOT is displayed on HOD from symbol
generator.
PASS:
Location of fault if sixth digit displayed on HOD is 0: replace symbol generator
(TM 11–1520–238–23–2).
FAIL: Location of fault: video recorder, video recorder control panel, wiring from video recorder
control panel to DASEC, DASEC. Troubleshoot wiring to isolate fault (TM 11–1520–238–23–2).
