Question about Toshiba 53H71 53 in. Rear Projection Television

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Location of the STK392-110

From what I have read online the convergence problem and "touch focus error" on the blue color is caused by bad STK392-110. What ckt board are they on? There are two ckt boards connected to the blue tube, one on the socket and the other on the neck. I didn't see any ICs on those boards. Do I get to these ICs from the front or back of the TV? Where are these ICs located?

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Re: Location of the STK392-110

The convergence IC's are large 2x3 inch(about) black in color IC's that stand up against a metal heatsink on the main printed circuit board. They will have white lettering on them that will plain as day when you see them. Make sure you replace these IC's with the manufacturers replacements and not some cheap copy, if the IC's cost less the 15 bucks a pop, they are cheap subs. Also do not forget the heatsink compound on the back of the new replacement IC's before you reinstall them. Good Luck

Posted on Mar 20, 2007

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Touch focus error blue

The tv HYPER board it is dead aslo known as a tv convergence board.Tv have a convergence problems,it is dead.Tv Magic Focus button no longer response give error messages.Tv have any colors lines R,G,B mis alignments,have colors shadows pictures or 3D picture look alike?Yes,than the tv HYPER board it is dead also known as a tv convergence board must have it components parts replaced like 2 STK convergence ICS and some or all of resistors too.To fixed the tv HYPER also known as a tv convergence board to solved the tv convergence pictures problems.The tvs shops will cost u like $300-350 for parts and labors.

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Replace both STK392-110 convergence IC's with Toshiba or
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Replace the Convergence amplifiers. Mine did the same. It was like watching a 3D movie without the glasses. It is not hard to do for someone who knows their way around a circuit board repair. Otherwise call a reputable service shop.

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The convergence IC`s need to be replaced and the related low ohm resistors need to be checked for proper value.

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