Question about Toshiba 42H81 42" Rear Projection Television

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I have a rear projection Toshiba 42 inch and cannot get convergen

I have a rear projection Toshiba 42 inch and the convergence of the colors seems to have gone wrong. An error message comes up after attempting one touch focus. The red has moved away from the blue and when one pulls up the screen with the nine areas for correcting the focus, it won't work.

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Sounds like convergence should replace chips marked Q 751 and Q752 part numbers ( stk392-110) check restors 1.8 ohms 1 watt rateing should be marked on board as R 7721 and so on, should more than one in the area of the ic. Look to see if there is some small fuses in the area also. They dont look like a normal fuse may be yellow or green black marked F on board around the ics these fuses are called pico fuse.

Posted on Feb 01, 2010

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Posted on Jan 02, 2017

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Ihave a toshiba 43 inch hd 2002 rear projection the picture has shiffited to the right can I fix this


This tv have a problems known as a convergence problems,it dead.The tv have colors lines R,G,B mis alignment,have colors shadows picture or 3D picture? The tv convergence board the 2 STK convergence ICS and some or all it resistors are dead.These parts on the tv convergence board,require changing to solved the tv picture convergence problems.The shop,will cost u $300-350 for parts and labors.

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The red color is bleading it can not be ajusted


Install the 50H81-65H81 convergence repair kit as its the same one for the 42 inch also. The kits available from www.tvrepairworld.com and it contains the parts and the Cd with instructions.

Jul 15, 2010 | Toshiba 42H81 42" Rear Projection...

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My 50" Toshiba has a color problem!!!


Ur convergence is dead.Must replaced the 2 Convergence ICS and all it resistors.By replacing these 2 convergence ICS well solved these problems colors misalign, 3D double pictures,blurry pictures.The shop will cost U $300 for parts and labors.

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1 Answer

My screen seems misaligned, the colors dont seem to be lining up properly how do i fix it?


Convergence it dead,must buy a convergence kit replaced what in that kit.U know how to solders?Tries these websites Tv repair World.com,Tv repair Kits.

Oct 27, 2009 | Toshiba 42H83 42" Rear Projection...

1 Answer

Samsung Rear 42 in Projection TV Calibration problem


Hi, if you are not able to adjust the convergence using the remote you will need to replace the convergence chips. 
Typical Symptoms

1) Convergence menu does not work for one or more colors.  
Such as: Red moves up,down, but left or right fails. 

2) Screen is bowed looking.

If you have one or more of the problems above you need to replace the convergence chips. You can get a kit and instructions from www.TvRepairKits.com  

Hope this helps :) 

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1 Answer

I have double vision on my projection tv (toshiba 42H83).


Sounds like your convergence chips have failed. This is a common problem. You can get a repair kit from www.TvRepairKits.com .

Apr 11, 2009 | Toshiba 42H83 42" Rear Projection...

2 Answers

Toshiba 42 inch rear projection T.V.


this sounds like a convergence loss... the most likely cause of this is what is known as stk's or convergenc ic(chips) have gone bad.. also it cound be the output resistors. most likely need replaced

May 12, 2008 | Toshiba 42H83 42" Rear Projection...

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