washed out picture with scan lines on sony kv-2643r

David Pereira

unread,

Oct 6, 1996, 3:00:00 AM10/6/96

to

Hello, I've inherited my grandfather's 26 inch sony trinitron since they
don't want to spend more repair money on this set. It has 20 or so scan
lines appearing in the picture (vertical retrace?) and the image is too
bright (washed out).

This is the second time this symptom has appeared. The orginal repair at a
TV shop was to replace the smaller circuit card on the neck of the CRT
with a used card. That repair lasted for 3 months before the same symptoms
returned. Perhaps some other problem elsewhere in the set is causing the
failure to the crt neck circuit card?

It is a nice tv, and I think the crt has some useful life left in it so I
would like to try and repair it. Any suggestions would be greatly
appreciated.

thanks
Dave
pere...@ucsu.colorado.edu

BELJAN E

unread,

Oct 7, 1996, 3:00:00 AM10/7/96

to

I think I may have found the cause of my troubles. I posted a while ago
about the Model 340GAR CD Boombox that will not even attempt to read.
Well, Over the last two days I used the Radio on AM (I rarely do but it
was for Football) Once, I moved the antenna and it shorted, the display
went haywire and I had to unplug it and plug it in a few times. The
other time was today, I was listening once again to football and it
stopped playing while on the porch. I unplugged it and plugged it in
and it still wouldnt work. Now here is the KILLER, I opened and closed
the CD player Door and the display which was blank instead of showing
the Radio station flickered all sorts of things and it worked. It the
CD somehow shorted? I know it is seperate and is connected to the main
board, the radio tuner is far seperate, but this makes it interesting.
Anyone know anything where I could go off this? I am buying a new one
tomorrow so I have CD and they are reduced and on sale this week.

Sam Goldwasser

unread,

Oct 8, 1996, 3:00:00 AM10/8/96

to

Probably not shorted but it does sound like you have bad connections
somewhere - as has no doubt been suggested in previous replies to your
original post. You will have to disassemble it and examine for cold
solder joints, loose connectors, clean and reseat connectors, etc.

I will not be able to tell you exactly where to look. Maybe someone else
has a working crystal ball. Mine has been in the shop for a couple of
years now....:-)

--- sam

Sam Goldwasser

unread,

Oct 8, 1996, 3:00:00 AM10/8/96

to

In article <Pine.GSO.3.95.961006...@ucsu.Colorado.EDU> David Pereira <pere...@ucsu.Colorado.EDU> writes:

> Hello, I've inherited my grandfather's 26 inch sony trinitron since they
> don't want to spend more repair money on this set. It has 20 or so scan
> lines appearing in the picture (vertical retrace?) and the image is too
> bright (washed out).

> This is the second time this symptom has appeared. The orginal repair at a
> TV shop was to replace the smaller circuit card on the neck of the CRT
> with a used card. That repair lasted for 3 months before the same symptoms
> returned. Perhaps some other problem elsewhere in the set is causing the
> failure to the crt neck circuit card?

Possibly but you should probably start by inspecting that board for
bad connections. I would not even be surprised if they didn't actually
replace it but touched up some solder connections.

> It is a nice tv, and I think the crt has some useful life left in it so I
> would like to try and repair it. Any suggestions would be greatly
> appreciated.

What sort of test equipment do you have available - some testing will be
needed (scope desirable) if you don't find some obvious problem.

--- sam