Question about Toshiba 55H70 55" Rear Projection Television

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Toshiba has to "warm up" for proper convergence

I have a 55h70, I've read many of the other posts and think I probably need to replace my ICs -- but the twist is that after an hour or so of being on, my picture looks perfect.

I guess I've had the set for about 5 years, after 1 year I noticed that when I'd turn it on the picture would be horrible, but after about 10 mins it got back to normal. As time went on (maybe a month) it started taking longer and longer to "warm up" and converge the colors (it's the top half of the picture only that has this problem). That became unbearable to me and I bought a plasma for cheap. I put the 55h70 away, meaning to get it fixed "one day".

4 years later I've pulled it out hoping to hook up a wii to it, and surprise, it didn't fix itself. After the set is on for about an hour the picture gets back to normal. If I turn the set off and back on, the picture is good... but if I turn it off for more than 10-15 mins, the whole process has to start over.

I know this is long and rambling, just trying to give as much background as possible. Here's the question: since the picture eventually becomes normal -- is this indicative that I should replace the ICs or does it indicate that maybe I should do something else?

thanks in advance for any help!

Posted by on

  • WWWillB Dec 28, 2007

    I'm going to give it a try. Looks like I typed too soon, I've had it on for 3 hours today and it hasn't healed itself yet.

    Could someone point me to step by step instructions (I know, it's asking a lot)? I've found step by step (with pics) for a Pioneer and a Panasonic (figured I'd repost the links in case it was helpful to someone).

    I'm sure I've read that going through all of this wasn't necessary for the Toshiba -- but I've read so much today that I can't place where I read it. thanks in advance, I'll keep you all posted of my progress.



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Will, sounds to me like the IC`s need to be re-soldered, probably got 1-3 joints broke, most times I`ve found that re-soldering them DOES NOT work, but yours "heals" itself so it may be all you need to do, I`d try that first and see if it holds up, if not then get the IC`s replaced and you`ve got a good set, questions? e-mail me back, good luck, BMW Rider

Posted on Dec 28, 2007


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1 Answer

The picture on my Toshiba 55H70 is distorted. Most of the screen is fine, but the bottom left looks bent with all three colors misaligned. I tried adjusting the convergence some but it did nothing for that...

hello am rico, you need to replace your convergence ics (stk392 or 393 something esle). check for caps,fuses, resistors, cold solder in the boards. if you need more help, feel free to call at anytime. 602-810-7149.

Jan 07, 2011 | Toshiba 55H70 55" Rear Projection...

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The left right blue convergence cross won't move in 4 of the nine sections

CK the 1.8ohm resistors and you might need to replace both of the convergence Ics STK392-110 use 120s Mats has them 1-800-628-1118

Oct 03, 2010 | Toshiba 55H70 55" Rear Projection...

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Yes,U have some basic machanicals skills?The Toshiba Tv convergence board,it call a Hyper board.Try website to buy a refurbish board.This board no longer produced by Toshiba,if can't find it.The Convergence 2 STK ICS,and some or all it resistors,must replaced manually.Must have tools,and knowing how to do basic soldering,to do this.

Apr 06, 2010 | Toshiba 55H70 55" Rear Projection...

1 Answer

Toshiba 55H70 lack of convergence, then no picture at all

Replace Both of your STKs they are your convergence ics they are big black ics have STK number on them if they are using 110s upgrde to 180s STK392-180 they are better ics. Call Electronix Parts 1-800-223-3205 they will have STKs.

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1 Answer

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you will need to change both convergence ics they are STK392-110. You can get replacement ICs at the following link with free instalation instructions with pictures.

Jul 25, 2008 | Toshiba 55H70 55" Rear Projection...

1 Answer


If the red isnt responding via the remote you will need to replace the STK392-110 Ics as the service menu adjustment will not correct it 100% due to the IC being faulty and the red and half the green is controlled by one IC and the blue and other half of green is controlled by the second IC so without changing both ICs the set will progressively get worse. Both ICs are stk392-110. You can get replacements at the following link along with instalation instructions

Jul 13, 2008 | Toshiba 55H70 55" Rear Projection...

1 Answer

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sounds like the convergence ICs are defective and need to be replaced, they are STK392-110 you can get replacement ICs at the following link that include free instalation instructions.

Jun 06, 2008 | Toshiba 55H70 55" Rear Projection...

1 Answer


You need to replace the two Convergence ICs. Please post the model number of your set and I will post the IC numbers you need and post a link where you can order replacements and get free instalation instructions with pictures so you can do the reppair yourself.

May 03, 2008 | Toshiba 55H70 55" Rear Projection...

1 Answer

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I used the SONY stk180's on my 55h70 and works great...2 years no problem.

Get the real thing though....the knockoffs do fail

I also made sure the contact surfaces between the IC's and the heatsinks were properly cleaned and used "Arctic Silver Thermal Paste" applied in an even thin coat on all contact surface areas.

Mar 20, 2008 | Toshiba 55H70 55" Rear Projection...

2 Answers

Rec convergence will not work

Your IC's likely need to be replaced. Also check your resistors that corrispond with the IC's. Here is more info on this.

Mar 03, 2008 | Toshiba 55H70 55" Rear Projection...

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