[TechAssist] Re: Sony KV-27HSR10 (1990) H.O.T Overheating....

call fulton radio at 1 800 248 0898 and see if they have the horiz output
kit in stock.
contains a new transistor and a resistor to replace the .68 one.
just give them model  number. and the location number.
i have had this problem before, and you are right , it will come back.
also you are right that these do run hot. but with the kit they hold up
fine,
gary
----- Original Message -----
From: "Frank Luu" <fkluu@xxxxxxxxx>
To: <techassist@xxxxxxxxxxxxx>
Sent: Monday, September 03, 2001 3:04 PM
Subject: [TechAssist] Re: Sony KV-27HSR10 (1990) H.O.T Overheating....


>
>
> Hello:
> My guess is that you have to replace with a new type
> of transistor. Try to order one from Sony. Even though
> the transistor have a same number,their
> characteristics is a little different.(don't ask me
> why).This problem happened to me so many times and I
> finally got to order the transistor from Sony.
> Also if the TV is larger than 32", I always install
> extra piece of Alluminium heat sink.
> Hope this help.
> Frank
>
> --- Bruce Tiedeman <btied@xxxxxxxxxxxx> wrote:
> >
> > I can not find the previous post on this problem. I
> > put in the original
> > Output transistor , I soldered the driver
> > transformer and connections in the
> > Horiz. section. I did change the .47\50 cap at the
> > driver transformer.
> >
> > Is there some thing else that has to be changed on
> > this chassis. The
> > transistor gets very hot. The waveform looks very
> > clean at the base of the
> > H.O.T . it starts to get hot after a few minutes.
> >
> > The original problem was a blown HOT transistor and
> > the special damper diode
> > . The R523 (.68 ohm resistor ) was over heated but
> > not blown. I replaced
> > this also.
> >
> > If I remember correctly these do run hot, just
> > didn't wanted to send this
> > out and have it come back...
> >
> > thanks for your input,
> >
> > Bruce
> > B&T Electronics.
> >
> >
> >
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>
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