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We have a rear projection tv and we cannot set the convergence on the red and blue lines to the green. IT is a toshiba 50HX81.

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You need to replace both convergence Ics they are STK392-110 its a very easy repair. You can get replacement ICs at the following link and they provide free instalation instructions with pictures. Heres the link.
http://servicemanuals.vstore.ca/

Posted on Jun 29, 2008

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Toshiba 50HX81 TV looks kind of old school 3D with red and green hue. Bad bulb? How involved is this to fix and where do I find parts?


No,not the bulb problems.Tv have a problems known as a convergence problems,it dead.Tv have colors lines R,G,B mis alignment,have colors shadows pictures or 3D pictures look like.The Toshiba tv have a "HYPER BOARD"known as a convergence board the 2 STK convergence ICS and some or all it resistors are dead.These parts on the convergence board,must be replaced to solved the tv convergence pictures problems.U have tools like a soldering iron,desoldering pump or desoldering braids,solders?Can u do basic soldering?Tries websites like Tvrepairworld.com,Tvrepairkits.com to buy a convergence kit to repair it ur self.The shop,will cost u $300-350 for parts and labors.

Oct 21, 2010 | Toshiba 50HX81 50" Rear Projection...

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Red, green, and blue lines at bottom of screen, mirror looking effect, also looks like 3D. Got at a garage sale so no manual.


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.

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Here is a quick test....

Using your original remote go-to the settings menu then goto the convergence section.

Try to adjust the red and then the blue convergence.

You should be able to move RED and BLUE in all directions - up, down, left, and right. And you should be able to get the grid straight.

If you can't move them in all directions or cant move them far enough your convergence chips are bad and should be replaced. This is a common problem.

Note: If you TV has as flash focus or magic focus button only try pressing the button. If it fails to fix the convergence your need to fix it. See below for a fix

69189a5.pngCONVERGENCE 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

Jan 03, 2010 | Hitachi 43F300 43" Rear Projection...

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Information on seeting convergence for 50hx81 tv


In the customer menu select convergence with the Toshiba remote.

If it is skewed and or will not adjust you have a convergence circuit problem. If this is the case let me know and I will tell you what is involved to repair the set.

I have fixed hundreds of sets with this kind of trouble.

If this has helped you, rate this solution as I do this here for FREE.

SD TECH

Nov 24, 2009 | Projection Televisions

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REd light blinking on my 50HX81 CRT TV- Toshiba,no


Check out the link below. Seems to be a power issue. Not sure if it is worth fixing.

http://www.justanswer.com/questions/1opaa-50hx81-tv-not-turn-power-button

Mar 07, 2009 | Toshiba 50HX81 50" Rear Projection...

1 Answer

Toshiba Rear Projection TV


In the videomenu theres an option called convergence. you can shift blue and red color arround the green on, hopefully solving you're problem.

Good Luck

Jul 20, 2008 | Toshiba 43A10 43" Rear Projection...

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Toshiba TV 50HX81


Check fuses on Power Supply board (F850, F851, F852) and all other fuses. Replace blown fuses (will need an ohm meter to check fuses). I would also replace the two convergence amps (STK392-110's on the signal board, the big black ICs on the two heat sinks). This worked for me.

Mar 30, 2008 | Toshiba 50HX81 50" Rear Projection...

1 Answer

Toshiba tv


convergance amp ic bad.
http://home.earthlink.net/~oleg.filippov/ConvergenceFix.htm
http://cmpalmer.blogspot.com/2006/11/fixing-my-own-tv-part-ii.html

Jan 07, 2008 | Toshiba 50HX81 50" Rear Projection...

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