Question about Toshiba 50HX70 50" Rear Projection Television

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50hx70 blue projection light is concaced at top and bottom of tv

Toshiba 50HX70, How can I fix the blue projection light looks like it is curved at the top and bottom of the screen when we use the converge adjustment. It will not allow us to centre the blue at the bottom and top.

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  • briano12 Jan 19, 2009

    it is a problem with the convergence board most likely. i had one go
    out after 4 years. then 3 years later it just went out again. I wish
    there was a cheap way to fix it.

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When the convergence amplifier ICs go bad (STK392-xxx), they RARELY cause more than one color to go out. The fact that the top and bottom of the picture are effected indicates the vertical convergence IC. Replace both, and while you're in there check the bias resistors... it is likely one of these is open. Once the ICs have been replaced (as well as any open resistors), customer convergence followed up with the auto convergence should do the trick.

Posted on Mar 10, 2009

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Where can i buy board for toshiba 50hx70


Hi


Thanks for using FixYa. You can buy the parts for your Toshiba 50HX70 from this link. Please do rate the solution if the issue is resolved or post a comment for further assistance.


Thanks
Rylee

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Tv repair


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