Question about Toshiba 42H81 42" Rear Projection Television

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2002 Toshiba 42H81 color blue will not align

Touch focus error the blue bows at the bottom of the screen

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  • hezib Jan 26, 2009

    I heard that there are a couple of I/C's that needs to be replaced. Could you tell me which ones and How?

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One of the amplifiers on the convergence circuit is not working

Posted on Dec 02, 2008

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My picture is wavy and out of focus. when i touch the auto focus it goes through the function but ends with failure. it is a toshiba 42h81.


The most likely cause is shorted convergence chips and possibly a few pico fuses.

These sets need to have all three colors - RED - BLUE - GREEN - lined up correctly on the screen in order for the picture to look normal. This is called convergence.

When its out of alignment the video will look 3-D, wavy, distorted, etc. Most of the time you just need to adjust your convergence in the menu. If you cannot adjust it in the menu - then your convergence is broken and needs to be repaired. Convergence problems are very common on all Projection TV sets including Sony,Samsung,JVC,Philip Magnavox,Panasonic,Akai,Pioneer Hitachi,Mitsubishi,Zenith and others.
You can get a convergenece repair kit with instructions from the links below.

Here are some of the most common problems with these sets...

Problem #1) Convergence

Yours may have one or more of the following symptoms...

*Screen Looks 3-D
*Colors wont align
*Screen may look distorted or warped
*No Audio/Video - TV Shuts down - May also make a constant chirping sound

Problem #2
Another common problem is dull or washed out video.

Your set may have one or more of the following symptoms....

*Dull looking picture
*White looking picture
*Halos around objects
*Red/Orange looking picture

You can see some more examples and find a fix herebb0cf99.pnghttp://www.fixya.com/support/r2861467-solution_video_looking_whiteish_dull

Apr 14, 2010 | Toshiba 42H81 42" Rear Projection...

1 Answer

Toshiba Rear projection 65" cinema series


You need to replace or have the convergennce IC's replaced. This is not a very hard job to do, but will take some soldering skills. Good Luck

Oct 21, 2007 | Toshiba 50A61 50" Rear Projection...

2 Answers

Toshiba 50hdx82 tv touch focus error blue is bowed.


Convergence is dead.Know how to solders.Must replaced the 2 Convergence ICS,and all it resitors.To do it ur self repair buy a convergence kit at Tv repair World.com,Repeairkits.com.The shop will cost u $300 for parts and labors.

Feb 04, 2010 | Toshiba 50HDX82 50" Rear Projection...

1 Answer

Toshiba 57hx81 tv has a bow at bottom of screen and blue in color tried using toush focus & got error then tried to focus manually & couldn't get the bottom lines to focus all the way down


noted in the owners manual, if auto focus returns message "error" , it suggests to use manual convergence setting..failing that, is it resonable to suspect that the STK-392-110 (convergence (2)chips)are beginning to fail, bendt horizonital lines is the effect. you can check all the resistors and pico fuses (power board)near the chips for shorts, chances are they are ok. seeing that there is somewhat of a picture (kinda like 3-d). i would repaired it!.. while your there do the hyperboard repair as well by replacing the 10 caps with 16v@10uf. (causing a wavy vertical distortion effect).

Jan 12, 2010 | Toshiba 57HX81 57" Rear Projection...

1 Answer

Blue color is off and bowed at bottom


Needs the 2 convergence amplifiers replaced and then convergence alignment carried out(Could be pricy)

Dec 04, 2009 | Toshiba 50H81 50" Rear Projection...

1 Answer

Convergence -manual


Replace the convergence amps and test and replace any or all of the 2.2ohm resistors in the yoke return path out in front of the amps. This unit takes two STK392-110 Sanyo originals, DO NOT GET CHINESE KNOCK-OFFS... Buy them from Acme sales out of Florida and you can be assured they're originals.
Bill

William Rayburn, CET
Premium Technologies
PO Box 442
Long Beach, WA. 98631
360-642-4993

Oct 11, 2008 | Toshiba 42H81 42" Rear Projection...

1 Answer

CONVERGENCE PROBLEMS


You need to replace the convergence ICs there are two of them. they are STK392-110 you can get replacement ICs at the following link and they provide free instalation instructions with pictures so you can do the job yourself and save about 400.00 Heres the link.
http://servicemanuals.vstore.ca/

May 18, 2008 | Toshiba 42H81 42" Rear Projection...

1 Answer

Still green


go In service convergence mode and try to adjust red and green if you cant then it's convergance amp ic's
if you can adjust them so they align up try doing a touch fous after that,.

Dec 16, 2007 | Toshiba 42H81 42" Rear Projection...

1 Answer

TOSHIBA REAR PROJECTION TV 42H81


you have a convergence problem that will require the replacement of the convergence amp ics.

Nov 29, 2007 | Toshiba 51H83 51" Rear Projection...

1 Answer

42H81 touch focus error


check for bad solder connections on the connvergence ics if that dont fix it then replace them

Nov 01, 2007 | Toshiba 42H81 42" Rear Projection...

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