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Article #538

Re: How can I match a horizontal driver transformer.

#538
From: alitonto
Date: Mon, 16 May 2005 12:20
37 lines
2557 bytes
Hello Frank,
That's the direction I was thinking but wasn't sure if anything in
particular needed to be observed. For example the schematics I obtained
from DSE, thnks for your previous reply, indicate that the volts to the
base of the HOT needs to be 0.34; therefore would I be correct in
thinking that the existing circuit board will produce that if I select
a close enough match for the driver transformer?
Cheers
A.T.


Franc Zabkar wrote:
> On 15 May 2005 06:15:10 -0700, "alitonto" <alitonto@hotmail.com> put
> finger to keyboard and composed:
>
> >I have  Digitor 12 volt TV Model G7200 year 1993 from Dick Smith
> >Electronics for which the H.D.Transformer is no longer available
from
> >spare parts. (Checked with DSE).
> >I am thinking what specs to look for if I was to find a spare part
in
> >my parts box.
> >Would this be possible at all?
> >It drives the HOT which is a BU407 and the chip on the board is an
> >LA7680 where pin 27 supplies the signal.
> >Any expertize here will be welcome.
> >Thks
> >A.T.
>
> Try adapting a transformer from a current model 12V TV. I would
> imagine they would be mechanically different but electrically similar
> (same B+, same frequency, similar output).
>
>
> - Franc Zabkar
> -- 
> Please remove one 's' from my address when replying by email.
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From: "alitonto" <alitonto@hotmail.com>
Newsgroups: sci.electronics.repair,aus.electronics
Subject: Re: How can I match a horizontal driver transformer.
Date: 16 May 2005 05:20:33 -0700
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