Vertical Hold fails when bright picture from AV sender

6 May 2005 2:45 PM

AJH

I have a GigaAir AV sender and receiver. The receiver is on a Pacific
PVTV361 TV/VCR (£80GBP from Asda). When the picture is very bright
e.g. during adverts with white backgrounds or explosion scenes where
the screen is filled with flames, the picture rolls, top to bottom like
the vertical hold has gone.

It happened on two other Bush sets from Tesco (which had identical
chassis to the Pacific incidentally) which I sent back before finding
the same problem on the "Pacific" and giving up.

I've found this reference to it happening to someone else, but no cure
anywhere:
http://www.amazon.co.uk/exec/obidos/tg/stores/detail/-/electronics/B000068TYR/customer-reviews/202-2684737-2760663

Anyone got any ideas?

7 May 2005 5:31 AM

Jomtien

AJH wrote:

>It happened on two other Bush sets from Tesco (which had identical
>chassis to the Pacific incidentally) which I sent back before finding
>the same problem on the "Pacific" and giving up.
>
>Anyone got any ideas?

Buy a decent TV or a different video sender. You can't make a silk
purse out of a sow's ear.

--
Digibox problem? : A reboot solves 90% of these.
The Sky Digital FAQ: http://tinyurl.com/7rm2m
How to get UK TV overseas: http://tinyurl.com/6p73
Fed up with logos / red buttons? : http://logofreetv.org/
BBC gone? : http://www.astra2d.co.uk/
----
Only the truth as I see it.
No monies return'd. ;-)

7 May 2005 2:25 PM

AJH

Yep, thought someone might say that!
Just thought there might be a tip out there, such as some magic black
box to smooth the signal, or a tweak for the TV's vertical hold.......

8 May 2005 5:40 AM

Jomtien

AJH wrote:

>Just thought there might be a tip out there, such as some magic black
>box to smooth the signal

That you can do, but to do it properly would probably require spending
more than the cost of a decent TV.

Try daisy-chaining the video-receiver output through a VCR before
passing it to the TV. This might work.

--
Digibox problem? : A reboot solves 90% of these.
The Sky Digital FAQ: http://tinyurl.com/7rm2m
How to get UK TV overseas: http://tinyurl.com/6p73
Fed up with logos / red buttons? : http://logofreetv.org/
BBC gone? : http://www.astra2d.co.uk/
----
Only the truth as I see it.
No monies return'd. ;-)

8 May 2005 9:39 AM

Graham

>
> Try daisy-chaining the video-receiver output through a VCR before
> passing it to the TV. This might work.

Good idea.

Also, assuming the source is a Sky Box, try setting the contrast in the
picture settings menu to low.

--
Graham.

%Profound_observation%

10 May 2005 12:36 AM

BlackRabbit

This will happen when the overall brightness of the composite video signal
crosses over the threshold for the sync pulses (1V p-p) you will have to
squash this signal using a video enhancer, this of course will cost more
than getting a decent video sender, you may be able to open up the reciver
and adjust the video output level using a pot trimmer. do this at your own
risk of course and knowing the warranty will be invalid.

"AJH" <ajhbo***@yahoo.co.uk> wrote in message
news:1115390726.790855.128410@z14g2000cwz.googlegroups.com...

I have a GigaAir AV sender and receiver. The receiver is on a Pacific
PVTV361 TV/VCR (£80GBP from Asda). When the picture is very bright
e.g. during adverts with white backgrounds or explosion scenes where
the screen is filled with flames, the picture rolls, top to bottom like
the vertical hold has gone.

It happened on two other Bush sets from Tesco (which had identical
chassis to the Pacific incidentally) which I sent back before finding
the same problem on the "Pacific" and giving up.

I've found this reference to it happening to someone else, but no cure
anywhere:
http://www.amazon.co.uk/exec/obidos/tg/stores/detail/-/electronics/B000068TYR/customer-reviews/202-2684737-2760663

Anyone got any ideas?

21 May 2005 10:43 PM

AJH

BlackRabbit wrote:

> This will happen when the overall brightness of the composite video
signal
> crosses over the threshold for the sync pulses (1V p-p) you will have
to ......
Thanks all.

I understand now
Regards.
Alan