Question about Toshiba 42H81 42" Rear Projection Television

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Toshiba 46wh08b the screen on my tosh bends at top corners and i cant get the convergence to rectify the problem

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Re: toshiba 46wh08b


Posted on Jan 22, 2008

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The screen bends and the colours separate in the bottom left corner.

This set uses two stk392-110 convergence chips.

If convergence WILL NOT ADJUST AND OR IS BOWED both chips and any of the 1.8 ohm protect resistors that are around them and bad need to be replaced.

This can be a do it yourself repair if you have some skill, total parts cost on EBAY would be under 25 dollars.

see attached photo of chips and what a typical convergence problem looks like.

If you are able to attempt the repair I can assist you.

If the photos and my solution here helped you rate this solution as "very helpful" as I do this here for free.




Aug 10, 2010 | Toshiba 42H81 42" Rear Projection...

1 Answer

Toshiba 43HX70 convergence problem

One or both of the STK convergence chips have probably failed.

I can give you guidance on this if you are confident to do the repair. I had the same problem with my Tosh 40WH08B and after replacing these chips it works like new.

May 21, 2009 | Toshiba Projection Televisions

1 Answer

Convergence Problem

There is a convergence board located inside the set that regulates the alignment procedure. this board is malfunctioning and there is a chip set on the board that has failed. you will need to replace this board in order to restore proper convergence functions.

May 21, 2009 | Toshiba TheaterWide 46HM94 46" Rear...

1 Answer


you have a convergence ampliphier ic failing that will need to be changed and then adjusted
average repair cost for this are 280.00 to 320.00

Jan 20, 2009 | Toshiba 50H72 50" Rear Projection...

1 Answer

Red gun on sony projection tv is distorted bends up in the top corners and down in the bottom corners.can't correct with the convergence controls, or flash focus.

you will need to replace the two convergence ICs and a couple of the pico fuses. Please respond to this same post with your model number and I will assist you further with the problem.

Aug 03, 2008 | Projection Televisions

1 Answer

Problem with tv

If your Model is Tosh 43H71,then pull chassis and locate F850,
F851 soldered-in fuses...check with meter..if open,replace with
proper value micro fuse(s) and solder jumper wires 008,010,017,
048,600 located on signal board.Replace convergence IC's
STK392-110 with IC's from kit # X 480295 ( upgrade )...........T.

Mar 31, 2008 | Toshiba 43H71 43" Rear Projection...

1 Answer

Green convergance goes out when tv warms up tosh projection tv

Convergence amp ic bad
Or send to

STK392-110 replace with STK394-160
STK392-120 Hitachi replaces these with STK394-160, for other sets it may not be a good sub. They have been fine in the Philips sets so far.
STK392-150 replace with STK394-160
***The 394 series replaced the 392 series and is cooler running. The subs listed here are the ones that I know to work in most sets.


Feb 20, 2008 | Toshiba 42H81 42" Rear Projection...

1 Answer

Toshiba 46wh08b projector television

Doug, convergence circuit is failing, involves removing one of the boards, replacing the convergence IC`s and probably a couple of burnt resistors, not a "layperson repair", requires soldering experience, accurate voltmeter to find the bad resistors, etc. I would suggest calling a tv tech for this repair, questions? e-mail me back BMW Rider

Jan 09, 2008 | Toshiba 46HM95 46" HDTV

3 Answers

Convergence no good on lower corners and upper screen

I'm assuming you used STK392-110 for a replacement. You could use STK392-150 for greater reliability and don't forget a good heat sink compound. (VERY IMPORTANT). What it sounds like is something even the best of techs battle. You probably didn't buy original Sanyo STK's but instead got a couple of the JApan knock-offs. Might I suggest you carefully replace them again and this time order them from B&D Electronics, on the net. You are assured of getting quality OEM replacements that way... We've had a bad batch that purchasing ordered quite some time ago and 2 out of the 14 ordered worked.. The rest were DOA (dead on arrival). Good Luck Bill

Apr 28, 2007 | JVC AV-48WP30 48" Rear Projection...

1 Answer

Strange Image Flubbering/Convergence Problem, Flutters From Dark Picture To Light Picture.

you "tooled around with the convergence board" well this chassis has several problems if the convergence doesnt hold replace both stks resolder around that area per tosh tech bulletin the bright problem is probably the hyper module all toshs should be checked with toshiba website to see if they were part of the recalls for power supply caps

Nov 30, 2006 | Hitachi 50UX57B 50" Rear Projection...

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