Question about Sony KP-51WS510 51" Rear Projection HDTV-Ready Television

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Covergence replaced ic's

First off thank you for your time!
I have a nice sony kp51ws510 from a guy at work who said the covergence was out. It was just the blue which I have delt with before on another t.v. I knew it was the ic's so I replaced them right away (I used generic stk392-560). I used what I thought was a nice amount of artic silver thermal compund for the heatsinks and my soldering was nice and neat. The set worked great for about a month or two. Just last nite I was hanging a speaker above the t.v. ( didn't slam it or anything) and when I came down and looked at it, I noticed all of the colors are out now and bowing or concaving in the upper left corner. It is BAD! Could this be bad ic's again or somthing else? Maybe because they were generic?
Any help would be greatly praised!!
Thanks again,

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Re: covergence replaced ic's

Well Josh, I am here to tell you, you are right. This is the problem you have when you replace the STK's and do not replace the return resistors. Atleast one thing you didn't need before were the small pica fuses, but now you might also. So yes you will need the amps again, and by the way this is the first time I am reading where someone used good compound on their IC's, They all need it but you are the first I've read that mentioned it. Hope this helps, and I wouldn't know off hand the resistors location without a schematic.

Posted on Jan 06, 2008

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Hi Josh,
Was the stk392-560 a replacement for a 110? I have found that, even though the manufactures seem to recommend to replace the original ic's with a 560, sometimes the 560 don't work quite right, or don't hold up long. Also I'll mention, that probably 80% of the big screen projection problem I get in my shop are the convergance chip, so I am to the opion that there is not a good solution for fixing the problem long term. ( In my opion, the manufactors need to invent something better ). Spend the 50 tp 100 dollars again and replace both chips again, but I recommend the originals, and use ample heat sink compound ( these chips run real hot ). Also some of the manufactors have started installing cooling fans ( suggestion ). A omputer CPU fan works quite well. Good Luck
NC Electronic
Mills, Wyoming

Jan 06, 2008 | Sony KP-51WS510 51" Rear Projection...

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