Question about Pioneer SD-P55A3-K 55" Rear Projection Television

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Red Convergence Popping In and Out, Mostly At Bottom

TV's always had a problem with a small bounce near the unit throws convergence out. Now the red convergence top to bottom goes out mostly at bottom third of screen. I'm assuming I'd start with replacing the convergence amps but am wondering if I'm better off hunting solder joints first.

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Re: Red Convergence Popping In and Out, Mostly At Bottom

If you're NOT still under warranty you should at least open the TV you can check the board where the components are mounted and resoled any that look bad. In your case it could caused by a leaky diodes or a bad solder joint. All can be replaced at a local electronic or hardware store and they're easy to replace. Heres a little case study in changing convergance Ic's, First thing is they are the hardest working Ic's in this set, this is why they are mounted to a huge heat sink to disapate the heat, and they work as a pair, You would not just change one tire on the back of your car, both tires have traveled the same distance and to think the other is going to be just fine is insane, Always change convergance Ic's as a pair and in older sets change all three. And the other little problem Several manufacture make this Ic, the cheapest one may not be the way to go here I think five companys make the STK392-040 over twelve make the STK392-110, In the case of this hard working Ic it is always best to go with the original manufacture Ic Just as a example here at the shop my employer told our parts guy to find some cheaper Ic's ( The STK392-110 ) since we burn through about 50 a month he found them Not the Panasonics that I run for about $19.50 each but some japen semis for a amazing $4.95 each, he bought 100 of them. Now about 1/3 failed right off the get go, the other half failed within 60 days causing a call back and since we get to pick the set up for free it gets better, and all the rest never made it a year. So out of the $1455.00 saved by getting these cheepies cost us over $7850.00 in free labor. Guess which ones we buy now... Good Luck.

Posted on Jan 16, 2006

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