Zenith T.V.Regulator

[Vince and Marge]

Hi!
I need someone to tell me what causes the S.T.R. 53041 to short out after
about two hours running, I have checked out everything I can think of and I
can't find anything that should cause it. This is a SLS2549S Mdl.
Thank you for any help you can give me.
Vince
vincent...@hotmail.com

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[Bill Jr]

CRT is shorting knocking out the regulator.
There is also info various places about bad batches of STR53041 IC's

Best to shop for a new set.

Bill Jr

"Vince and Marge" <vmsc...@hamilton.net> wrote in message
news:3eea5...@corp.newsgroups.com...

[Jason D.]

On Sat, 14 Jun 2003 01:56:38 GMT, "Bill Jr" <bi...@nospam.usa2net.net>
wrote:

>CRT is shorting knocking out the regulator.
>There is also info various places about bad batches of STR53041 IC's
>
>Best to shop for a new set.
>
>Bill Jr

Interesting and wholeheartedly agree, done a bunch of SMPS rebuilds of
those junkies. What a pain and slow process, STR running HOT on
inefficient heatsink, CRT pix stinks even customer thinks it's ok
before "The SMPS Explosion", risking bounces bec of those shitty CRTs
waiting in time and take a few swipes at SMPS or fly/HOT. Snap,
crackle, snap-BANG.

I just had same thing as u have after saw what customer's descriptions
of what happened on work order. Flashing (this is CRT arcing), went
out and never power up, etc). Took set straight to the scrap area
after confirming can't power it up AND gave a estimate for SMPS,
horizontal rebuilds, advising scrapping because I told boss that
particular sets are known to do exactly that. BTW customer did said
that set had CRT replaced 4 yr ago FOR an 1994 vintage! I knew that
customer will flunk that estimate. I've to smash it up next monday
bec we're very short on space.

That particular set is Z because case style shouted "Z!" that unit is
rebranded for Citizen.

Cheers,

Wizard.

[David]

#1 cause: PICTURE TUBE.
#2 cause: CRT
#3 cause: flyback arcing.

More likely you have an infamous shorting Zenith picture tube. The "L" and
"M" i.e. SLS,SMS, were notorious for this failure especially the 25" size
tube.

Assuming the tube has been replaced recently. High ESR capacitors in the
power supply can cause this, but I have not seen a single SLS or SMS that
did not have a bad/shorting tube in over 4 years.

David

Vince and Marge <vmsc...@hamilton.net> wrote in message
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