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

hi Bruce factory service says the change hot to 2SC4927   Eric

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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