Question about Toshiba 51H83 51" Rear Projection HDTV-Ready Television

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Suspected Convergence Issue on Toshiba 51H83?

After using the Touch Focus feature on my 3+ year old Toshiba 51H83 for the first time today, I suddenly have green and red wavy lines and a distorted section at the top middle of the screen -- almost an effect of looking at a 3-D picture without 3-D glasses. When I try to do a manual convergence, the #2 square on the 9-point convergence setting has a green square with the number two in it above the blue and red cross hairs. I am not getting an error message, but something obviously went terribly awry!! Any suggestions?

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Needs chassis pull & convergence IC's replaced....then
Touch Focus will work again..................T.

Posted on Nov 19, 2007


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My 15 year old toshiba projection tv that was hardly used. the screen now will not light up and on off button is blinking

Hello, I just received your email about your TV and will do a little research on it to give you a good answer to the problem real soon later today. Thank you Looks like a 51H83 model

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Check the 1.8 ohm resistors in the convergence circuit there will be 6 all 1.8ohms, They will be where your STK ICs are
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The convergence ic board is dead.
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Aug 19, 2009 | Toshiba 51H83 51" Rear Projection...

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did you check and or replace the feed resistors for the Convergence when you replaced the ICs?

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Your set uses two convergence amp ICs they should both be changed their numbers are STK394-250 They are attached to a large heat sink the board location numbers are Q751 and Q752 You can get replacements at the following link and they provide installation instructions and free on line tech support by insatant messageing when you do the repair. Heres the link

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1 Answer

Toshiba 65H81 convergence issue

Does the blue and red crosses move at all ... eather vertically or horizontally. if they move at all then it may not be the chips.. could be a resistor. if the crosses dont move then it probally the ic. these chips run about 7 to 45 dollars apeace depending on type. at our shop we charge around 125 to put in.

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I have a wild guess. I have the same tv and channel 72 is the proper channel to watch tv on. I don't know why, but maybe try channel 72 instead of the usual channel 3. Good luck, maybe a quick fix, maybe not!

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