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

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Convergence Hello all, I got me 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 a mil guys, Josh

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The bowing or concaving in the upper left corner was just caused by the mecnetic field. Keep the speakers away, the pictures should return to normal in a week or two.

Posted on Jan 13, 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

Posted on Jan 06, 2008


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3 Answers

Arched screen

You have a convergence problem. Here are some of the most common symptoms.

Screen looks 3D
One or more colors can't be adjusted when using the convergence menu.
Screen is bowed in but stationary.
Here is a quick test....
Using your original remote go-to the tv settings then goto the convergence section.
Try to adjust the red and then the blue convergence.
You should be able to move them up, down, left, and right.
If you can't move them in all directions your convergence chips are bad and should be replaced. This is a common problem.
You need to replace the convergence chips and convergence resistors.
Check the site

They have put together a kit for your exact model.

The kit includes a photo instruction guide, original Sanyo STK chips, convergence resistors, etc. Everything you need to fix it yourself.

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I don't think this is just a do it ur self kind of fault
Sorry. I can't be of any more help

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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.

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

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