Question about Toshiba 50H82 50" Rear Projection Television
I have a Toshiba 50H82 with what I believe is a convergence problem specifically with red. While using the "Touch Focus" I notice that all the colors seem to move except the red. It moves vertically but not horizontally and then results in a "Touch Focus Error" message. The picture looks as if the red convergence is off horizontally by a few inches. I have a friend who is an electrician and willing to help with the repairs. I noticed that in a previous post from March of 2008 that you sent another person the service manual. Is there any way that you could send the service manual to me also? And does it seem like the red convergence is the problem?
You might try setting in manual convergence and see if you get the same results. If so, YES, I would say that you possibly have to replace the convergence amps Q751 and Q752... That unit takes two stk392-110 Sanyo amps. When you buy them don't get knock-offs for some cheap price or you'll do the job twice. Order from someone like ACME in Florida. You can up the amp rating to 150's or 180's if 110's aren't available - but 110's will work just fine... Check your return resistors out in front of the amps also for any deviation in value.
You might also check for the presence of your -32v at Q783 and if missing replace it also - but from what symptoms you're describing it may only be the convergence amps..
Be glad to send you the manual, just email me personally and give me enough info as to what you need - I get nearly 3000 emails a day so "send me the manual" will not be enough to jog this old man's memory..
Posted on Oct 13, 2008
a 6ya expert can help you resolve that issue over the phone in a minute or two.
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Posted on Jan 02, 2017
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