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

  • From: Quality Video Service <BTSteve@xxxxxxx>
  • To: techassist@xxxxxxxxxxxxx
  • Date: Sat, 01 Sep 2001 10:30:08 -0500

Does the picture have excessive width?
If so, you might look at the caps on the collector of the H.O.T.
Just a thought.....

Bruce Tiedeman 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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--
Steve Rumel
Quality Video Service   7008 Long Point   Houston, Tx. 77055
713-956-2400   713-956-2403 FAX   BTSteve@xxxxxxx
Other life   :-)
Col Steve Rumel, CAF
Crew Chief, BT-13A
Safety Officer, 2001
West Houston Squadron


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