Question about Toshiba 50HX70 50" Rear Projection Television

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Toshiba 50HX70 convergence problem

I have seen a few articles on this subject but I was hoping someone can give me specific help with this problem. I try to fix the convergence on mt Toshiba color stream (cinema series HD) model 50HX70, but I cannot set it up properly on the left side of the screen. The central crosshair, and all crosshairs on the right and middle of the screen are OK but when I try to fix the cross hairs on the left side, I cannot move the red color (I am missing about a half inch). I am including a picture to demonstrate this. Can anyone recommend a solution?

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  • Patrick Blondin May 12, 2007

    Here is the picture of this problem.

  • centaur Nov 15, 2007

    I have the same problem can't get the red to go all the way over on the cross-hairs

  • kathy4larry Jan 09, 2008

    my problem is my arrow signs don't work to move the red and green colors in convergence screen.

    any help would be appreciated


  • krw35 Jan 14, 2009

    Did any of the above posts try this and if so did it work? I have the same problem and am debating whether to order the parts and try to fix it myself (I am not so handy) or just buy a new tv.



1 Answer

Replace convergence ic,s part # stk392-110, you will need two of them.

Posted on May 13, 2007


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Im having a convergence problem with my 50HX70. The tv was working fine until one day i turned it on and there was a blue shadow on the bottom half of the screen. I tried to adjust it and the horizontal...

Tv have a dead convergence board.The convergence board require replacing 2 STK convergence ICS and some or all of it resistors too.To fixed the convergence board to fixed the tv picture convergence problems.U have all tools and can do soldering?Yes,tries websites like, to buy a convergence kit to repair it urself.Or the shop,will $300-350 for parts and labors.

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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.

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Toshiba 50HX70 Convergence reset

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you need to replace both the convergence ICs number STK392-110 you can get replacement ICs at the following link and they provide free instalation instructions with pics so you can do the repair yourself. Heres the link.

May 29, 2008 | Toshiba 50HX70 50" Rear Projection...

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There are kits available online, which include the chips and the soldering iron too.......Just a word of caution, convergence chip replaced is more difficult on Toshiba #1 the chips face other boards that must be remove first. the main one is the convergence generator (which the sheild is soldered in placed) Also the signal board (which is what everythings mounted to is very fragile)..............Good Luck

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1 Answer

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