Sony KP-46WT500 Convergence

My problem started with colors being separated and the picture was bowed inward at the center. I was told that it was a convergence problem and to replace 2 IC's, part # STK392-560. The problem is still there. I have been in the setup mode and tried to adjust with no success, I can make it worse but not better. It was also recommended that I replace or repair the digital convergence box. I can not find it. I have a service manual but can not find the part. Any ideas on what I should check or replace next. Any help is greatly appreciated. It been fun working on this but Iam ready to move on.

dcmj Aug 23, 2007

I have checked everything I can find on this board. Everything checks out OK. Got any more ideas

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Try this mate: download the manual from here: http://manualshark.org/p/sony-4/sony-kp-46wt500-5918/ you need to get 2 Sanyo STK-392-560 IC', Also do not forget to install a new coating of heat sink compound on the back of the NEW IC's before you install them onto the printed circuit board. You also may find out that after you replace these two IC's, the set has no big difference from what it looked like before. DO NOT DISPAIR! There are probably open feedback or return resistors or Circuit Protectors around the convergence ICs. Take a multimeter and measure the plus and the minus 22volts DC on both IC's. The manual will show you where these points are. You need a low wattage soldering iron, and you can go to mcmelectronics.com and find one for less the 20 bucks. Then you will need some rosin core solder, some solder wick, and a few good hand tools. It is very easy to unstrap the wires going to the chassis and simply turn over the chassis and unsolder the connections., BUT I highly recommend, if you have had no or very little experience unfaltering or soldering on a printed circuit board, this is NOT the place to be experimenting with this. Please call someone who has the experience. Good Luck.

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Posted on Aug 22, 2007

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