Question about Toshiba 55H70 55" Rear Projection Television

2 Answers

Color convergence problem

I have the Toshiba Cinema series TP48D90. All of a sudden, in the bottom third of the screen, the colors are not merged and the picture is distorted. For example, the football scores at the bottom are separated blue and red, with the red appearing curved upward toward the middle of the screen.

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  • templetontod Dec 06, 2008

    bottom third of the screen the red and blue will not converge can this be fixed inexpensively

  • sdlaleune Dec 06, 2008

    Red colour can not be moved Left , right when tring to convergence

  • Anonymous Dec 18, 2008

    same

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2 Answers

Is that an expensive repair? The TV is almost 12 years old. I am not willing put more than about $100 into it to for repair.

Thanks

Posted on Dec 17, 2007

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The convergence ic's are faulty.

Posted on Dec 16, 2007

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Posted on Jan 02, 2017

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Re: Toshiba 65 in Cinema Series - 12 years old. Color Separation. Green bow at top center of screen, red and blue double images tilting upwards toward sides. Sometimes clears unassisted after set has...


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.

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.


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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.

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TV set after fluid change

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69189a5.pngSOLUTION

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

Jan 20, 2011 | Toshiba 65H82 65" Rear Projection...

1 Answer

My Toshiba cinema series HD separates the red & blue color.


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 18, 2010 | Toshiba 57H82 57" Rear Projection...

1 Answer

MY COLORS ARE NOT LINED UP I AM GETTING ONE COLOR THEN ANOTHER JUST BELOW IT THE BULBS ARE NOT LINED UP I THINK MY HUSBAND BUMPED IT DONT KNOW HOW TO GET INTO THE BULBS TRIED FROM THE BACK AND THE FRONT...


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

Apr 07, 2010 | Toshiba TN43V71 43" Rear Projection...

1 Answer

Color convergence issue.


Yes,U know how to solders?Must replaced 2 convergence ICS,and some or all it resistors.Tries websites Tv repair World.com,Tvrepairworld.com to buy a convergence to repair it ur self.The shop will cost U $300 for parts and labors.

Mar 27, 2010 | Toshiba 55H70 55" Rear Projection...

1 Answer

At the bottom of the screen the words or picture is duplicated in blue in an arch pattern what is the problem


This is due to needing to adjust the convergence. Go to your menu using the remote. You may have to go into advanced to find the convergence option. This should allow you to merge the colors together on a grid. From time to time these projection TVs get this problem especially if they are bumped or moved. It's easy to fix. Make sure you sit of stand directly in from of the TV to move the color lines together.
Rob

Oct 24, 2009 | Toshiba 50HX81 50" Rear Projection...

1 Answer

Convergence problems on right side of toshiba 43h70 43


Hello, its very possible there are other color alignments thats out of ajustements and certain color lines will affect each range of alignment and
you will need a tech to come out and check the control unit on your set.
BWLY

Jan 23, 2009 | Toshiba 43H70 43" Rear Projection...

1 Answer

Toshiba cinema series convergence problem


If you wish to get some details; visit the site linked here. Pull up older posts.
http://electronicshelponline.blogspot.com/ Convergence adjustment procedure to many brands of projection TVs are given in detail.

Jul 10, 2017 | Toshiba CX36F84 TV

1 Answer

Possible convergence problem


You could replace it yourself. I had it done recently and the local repair shop charge $400 to do it (including cost of the chip).

Jan 30, 2008 | Toshiba TP50H50 50" Rear Projection...

1 Answer

TN55X81 Rear Projection color separation - convergence problem


You shouldn't need to do a board replacement, all you should need to do is manually tune the convergence.

You can do this with the built-in user tool, but there's also a far more powerful set of options in the service mode. To save you the trouble (I advise doing a LOT of reading before attempting any of this) here's a solid set of various tutorials based on what form of "separation" you have occurring:

http://www.keohi.com/keohiHDTV/brandspecific/toshiba/servicemenu/servicemenu.html


Nov 21, 2007 | Toshiba 55H70 55" Rear Projection...

1 Answer

Toshiba 50HX70 convergence problem


replace convergence ic,s part # stk392-110, you will need two of them.

May 12, 2007 | Toshiba 50HX70 50" Rear Projection...

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