Question about Toshiba 50HX70 50" Rear Projection Television

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Toshiba convergence I have a toshiba 50hx70.  The convergence is way out.  I am told that the convergence board needs repair.  I am not afraid to give it a try, but would love some advice.  From what I have read I probably need to replace the stk392-110.  I am wondering what else might be the problem and if there is something I need to be careful of.  I don't have the $300 the repair man says it will take for him to repair it.

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Re: Toshiba convergence

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

Posted on Jan 11, 2008

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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.

Mar 18, 2011 | Toshiba 50HX70 50" Rear Projection...

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Remote and volume not working on toshiba 50hx70 after changing out convergance chips

It sounds like you may have not have plugged something in or one the connectors are not "seated" or securely properly/tightly.
Make sure there is not any cables and modules are properly (tightly) secured and tightly secured.

Good Luck, big IRISH.

Dec 28, 2009 | Toshiba 50HX70 50" Rear Projection...

1 Answer

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

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.

Nov 19, 2008 | Toshiba 50HX70 50" Rear Projection...

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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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Toshiba 50HX70 Convergence reset

You will need to replace the convergence ICs. You can order them at this link and they provide free support as well as installation instructions with pics so you can do the repairs yourself. You will need to replace both convergence ICs

Mar 30, 2008 | Toshiba 50H72 50" Rear Projection...

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

May 12, 2007 | Toshiba 50HX70 50" Rear Projection...

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Toshiba 55hx70

check all the fuses. Its easy to mis the 2amp pico fuse mounted near the middle of the power board. When this fuse opens, the red at the top, especially at the left side of the screen, will not adjust enough. Be sure to use new heatsink compound behind the ic's Shutdowns,are usually,not an easy repair Good luck

Jan 31, 2006 | Toshiba 50HX70 50" Rear Projection...

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