American Dynamics Multivision Quest TMV910Q, User Manual

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User’s Guide
68 Appendices
Symptom: Random characters are displayed on OSD during VCR playback.
Reason: VCR tape is worn out.
Solution: Change tape.
Symptom: VCR TIME was not set to “SYNC” mode, but some channels cannot be displayed during playback.
Reason: The REC MODE, REC TIME or REC DENSITY setup value was not
correctly matched between multiplexer and VCR.
Solution: Change the incorrect setting and try again.
Symptom: VCR TIME was set to “SYNC” mode, but some windows cannot be displayed during playback.
Reason 1: The REC MODE setup was not matched between multiplexer and
VCR.
Solution: Change the REC MODE setting and try again.
Reason 2: The SYNC TRIG EDGE setup was not matched between multiplexer
and VCR.
Solution: Change the SYNC TRIG EDGE setting and try again.
Symptom: The above solutions do not solve the problem.
Reason: VCR malfunction.
Solution: Perform the following diagnostic test:
Enter Installer Set Up menu, change the “VCR INPUT CHECK” to
ON, exit the menu and, playback VCR tape. There will be two lines of
characters on the screen:
?VCR INPUT FIELDS? ????? equals the total number of multiplexer
input fields received.
?VCR ERROR FIELDS? ????? equals the number of fields that contain
errors.
If the number of errors is high, the multiplexer cannot receive correct
encoded video signals from the VCR. This could be caused by:
Worn out tape, VCR head is dirty, video cable contact problems or a
broken VCR.
If VCR INPUT FIELDS=0, the “VCR IN” cable may not be connected
correctly. Ensure the VCR IN of the multiplexer is correctly connected
to the VCR's output connector.