TOSHIBA REAR PROJECTION TV 42H81

I am having a problem with the green, I can not converge the blue and the red to the green. The green curves out of alignment. Any suggestions? Can it be repaired? Is it an easy expensive fix? I pressed the Auto Focus button on the front panel and got "Auto Focus Error" message on the screen. I was trying to resolve the two horizontal dashed-green lines appearing toward the top of the screen.

jamesv2 Nov 29, 2007

How would the two dashed horizontal lines indicate a convergence problem? I thought convergence meant alignment of the three colors being displayed on the screen in the proper position.
Are the convergence amp ICs hard to replace or should I have a TV repair guy do the job?

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

Posted on Nov 29, 2007

Anonymous Nov 30, 2007

Your initial statement was "I can not converge the blue and the red to the green. The green curves out of alignment." That would indicate a convergence problem.In answering your second question, yes I would recommend a qualified tv repairman to service your tv. To access the conv. amps the DCU (Digital Convergence Unit) and the Hyper Pcb need to be completely removed and care to the signal pcb should be taken due to double-sided circuits that are very easy to crack or worst break.

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I have a Toshiba 42H81 42 in. Rear Projection Television. The picture has shadows like you would watch a 3D image without glasses. I ran the focus on it and the vertical red has noise in it and at the end...

Please do us a favor and rate this solution after reading.

Projection TV sets have two very common problems. One is convergence ( 3D/Warped video) the other is CRT fluid ( Dull Video). Here are more details and solutions for both. Repair kits with instructions are also avail from www.TvRepairKits.com

Common Problem #1) Convergence has gone out

Projection TV sets need to have all three colors - RED - BLUE - GREEN - lined up correctly on the screen in order for the video to look normal. When its out of alignment the video will look 3D, wavy, distorted, etc. Most of the time you just need to adjust your convergence in the TV menu. If you cannot adjust it in the menu - then your convergence is broken and needs to be repaired.

This is a very common failure on these projection sets and a fairly simple DIY fix. All projection sets including Samsung, RCA, Sony, Philip Magnavox, Panasonic, Pioneer, Akai, GE, JVC, Toshiba, and others at some point will have the same problem.

Common Symptoms include....

Screen looks 3D
Colors don't line up
One or more colors can't be adjusted when using the convergence menu.
Screen is bowed or warped.
TV shuts off after powering on. Power light will blink. TV may also make a chirping noise.

Here are some pics of convergence problems.

SOLUTION #1

For more more examples and find a fix using this link on Fixya http://www.fixya.com/support/r2861467-solution_video_looking_whiteish_dull

Common Problem #2) CRT Fluid is Cloudy

Projection TV tubes have a liquid coolant that is used to keep them from overheating. After many years the coolant in the blue and green tubes will become cloudy and cause the screen to look dull, red/orange, etc. You may even see halos around images.

Picture of a set that needs the fluid changed.

TV set after fluid change

SOLUTION

You can see some more examples and find a fix using this link on Fixya http://www.fixya.com/support/r2861467-solution_video_looking_whiteish_dull

Please do us a favor and rate this solution after reading

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Jan 31, 2011 • Toshiba 42H81 42" Rear Projection...

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My tv toshiba 43n9uxa has a red shadow to images and seems tilted on the edges with blue hue

Ur tv convergence are dead.Must know how to solders?Must replaced 2 STK convergence ICS,and some or all it resistors.Tries websites like Tv repair world.com,Tvrepairkits.com to buy a convergence kit to repair it ur self.The shop will cost $300-350 for parts and labors.

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Apr 26, 2010 • Toshiba 42H81 42" Rear Projection...

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Toshiba rear projection tv has red and blue on the tv

Projection TV sets have several common problems listed below.

Problem #1) Convergence

Symptoms:

Screen Looks 3-D
Colors wont align
Screen may look distorted
No Audio/Video - makes a chirping sound.

Example Photo:

Problem #2 CRT Fluid has clouded over.

Symptoms

Dull Video, Washed out
White/Bright looking video
Halos around objects
Red/Orange looking

Example Photo:

You can see more examples and find a fix here...

http://www.fixya.com/support/r2861467-solution_video_looking_whiteish_dull

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Mar 24, 2010 • Toshiba 42H81 42" Rear Projection...

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Toshiba model 42H81 projection tv receiving blue and yellow shadows on screen.

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

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Feb 06, 2010 • Toshiba 42H81 42" Rear Projection...

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Red lamp is out of Focus and the red is curved on the bottom left hand side of the screen. Auto Focus shows error. What could cause this to happen.

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Jan 14, 2010 • Toshiba 42H81 42" Rear Projection...

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There is blue yellow color blur on the screen with cable or dvd

Hi,
This problem is of "CONVERGENCE". You have to replace the convergence IC's which is better to buy a new one TV, Just contact any expert and replace the convergence IC's and your TV work fine again you need not to buy a new TV.
Thanks for using fixya.

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Jul 24, 2009 • Toshiba 42H81 42" Rear Projection...

0helpful

1answer

Colours are out

Projection TV sets need to have all three colors - RED - BLUE - GREEN - lined up correctly on the screen in order for the video to look normal. When its out of alignment the video will look 3D, wavy, distorted, etc. Most of the time you just need to adjust your convergence in the TV menu. If you cannot adjust it in the menu - then your convergence is broken and needs to be repaired.
This is a very common failure on these projection sets and a fairly simple DIY fix. All projection sets including Samsung, RCA, Sony, Philip Magnavox, Panasonic, Pioneer, Akai, GE, JVC, Toshiba, and others at some point will have the same problem.

Common Symptoms include....
•Screen looks 3D
•Colors don't line up
•One or more colors can't be adjusted when using the convergence menu.
•Screen is bowed or warped.
•TV shuts off after powering on. Power light will blink. TV may also make a chirping noise.

Here are some photos of convergence problems

CONVERGENCE SOLUTION

You can see some more examples and find a fix using this link on Fixya - CLICK HERE

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Mar 10, 2009 • Toshiba 42H81 42" Rear Projection...

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Color convergence alignment

change your convergence ICs that should solve your problem.If you need more info let me know.

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Apr 08, 2008 • Toshiba 42H81 42" Rear Projection...

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If you are referring to the convergence alignment of red,green and blue........will require technical and mechanical skills.....
1) Pull chassis
2) Replace both STK392-110 convergence IC's
3) Reset alignment as needed........................................T.

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Nov 23, 2007 • Toshiba 42H81 42" Rear Projection...

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