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From: powerampfreak on 14 Feb 2010 10:41
Hi all, what can the problem with a Samsung plasma TV model PS-42V4S
with vertical lines all over the screen. The owner says the vertical
lines has become worse over time, which make me think of problems
associated with electrolytic capacitor aging.
Could this problem be caused by bad electrolytes in the powersupply?
Check out this picture: http://i48.tinypic.com/2gw9b14.jpg
Greatful for any advice,
Best regards
PAF
From: N_Cook on 14 Feb 2010 10:54
powerampfreak <powerampfreak(a)hotmail.com> wrote in message
news:a516623f-5ac3-458d-964f-26bc84b07d67(a)z19g2000yqk.googlegroups.com...
> Hi all, what can the problem with a Samsung plasma TV model PS-42V4S
> with vertical lines all over the screen. The owner says the vertical
> lines has become worse over time, which make me think of problems
> associated with electrolytic capacitor aging.
> Could this problem be caused by bad electrolytes in the powersupply?
> Check out this picture: http://i48.tinypic.com/2gw9b14.jpg
> Greatful for any advice,
> Best regards
> PAF


Is the ps f set by the line rate or is it stand alone ? and maybe f
marginally adjustable with a bit of pF C paralleled somewhere and so change
the fringe pattern in sympathy, if a ps problem


From: powerampfreak on 14 Feb 2010 11:11
On 14 Feb, 16:54, "N_Cook" <dive...(a)tcp.co.uk> wrote:
> powerampfreak <powerampfr...(a)hotmail.com> wrote in message
>
> news:a516623f-5ac3-458d-964f-26bc84b07d67(a)z19g2000yqk.googlegroups.com...
>
> > Hi all, what can the problem with a Samsung plasma TV model PS-42V4S
> > with vertical lines all over the screen. The owner says the vertical
> > lines has become worse over time, which make me think of problems
> > associated with electrolytic capacitor aging.
> > Could this problem be caused by bad electrolytes in the powersupply?
> > Check out this picture:http://i48.tinypic.com/2gw9b14.jpg
> > Greatful for any advice,
> > Best regards
> > PAF
>
> Is the ps f set by the line rate or is it stand alone ? and maybe f
> marginally adjustable with a bit of pF C paralleled somewhere and so change
> the fringe pattern in sympathy, if a ps problem

I don't know if the psu F is synced to the line F, but it is probably
since it's inside the TV.
I repair lots of CRT tv's but not much plasma or lcd. I suspect there
is some kind of B+ to feed the line stages?
Regards,
PAF
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