[net.video] PV1730 Vcr and VIR

km%emory.csnet@csnet-relay.arpa (03/21/85)

I have a Panasonic PV1730 VHS Hifi VCR. Generally it seems ok.
The sound is a big improvement over my 5 year old VHS unit, and
the picture is about the same.

However, I have one problem. I have two tv sets that I use it with.
One is a 10 year old Sony, with which it works fine. 

The other is a 2 year old Panasonic which is the problem. The 
Panasonic has VIR, and it is an all or nothing proposition. If
you turn on automatic it uses the VIR signal if its their, or
some heuristic if it is not. If you turn off automatic you are
totally on manual. You can tell if it is using VIR or not when
it is on automatic by an indicator light on the tv.

The problem is that the VCR attempts to reproduce the VIR signal,
but does not do it correctly. If I leave the tv on automatic
the bad VIR signal throws it way off. At times you can see the
VIR indicator light flicker while playing back a recording, with
the color varying along with it.

My old non-hifi vcr does not have this problem. It seems to reproduce
the VIR signal correctly. The new vcr works fine with the Sony
tv , which does not use VIR for automatic adjustment.

My solution is just to manually adjust the Panasonic tv, when I
use it with  the PV1730. When the vcr was brand new, I had the
dealer swap it out, so I know that it is at least not a single
unit defect.

Has anyone else noticed anything like this?