Question about Toshiba 50H82 50" Rear Projection Television

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Red color convergence

Hi. I have a Toshiba 50H82 rear projection. It has worked wonderfully for about 4 years,( i think!) However, a few weeks ago, I turned the unit on, and the color convergence was suddenly bad. Upon trying to align it, I quickly realized that the Red color would only adjust horizontally, not vertically.

I read several sites online, and quickly determined that my problem was probably in part #STK392-150, which I ordered a pair of.

UNFORTUNATELY, I did that BEFORE I took the back off of the thing! I really didn't think it would be difficult to find parts of this size inside the unit, but I really don't want to take apart more than I have to, and I am finding no schematics anywhere.

First: Do you agree that I am on the right track?
Second: If so, could you help me to locate this (these) part(s)?


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Re: red color convergence

Looking from the back of the TV there are 2 large finned aluminum heat sinks just right of center. The chips are mounted on them. The one that you need to change is the one closest to you. It will be marked on the bottom side of the board with the letter " V " Unfortunately the chip and heat sink have to be removed at the same time because there is no room to loosen the chip in circuit. This job requires excellent soldering and de soldering skills. There are tiny surface mounted components near the pins of the chip that can be easily dammaged. You also need to check for any burned resistors or open pico fuses near the chip. Use original Sanyo IC`s no generics. Be liberal with the heat sink compound. Good luck and yes you are on the right track. One last note, just change only 1 chip not both unless you are unsure.

Posted on Dec 13, 2007

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Toshiba Rear Projection TV picture color is now a greenish hue

Hi, I used to work in Best Buy and one of the key things about rear projection TVs and the reason they push those service plans on you is that the tubes/colors need to be calibrated each year. You can do this yourself by checking out the following website: 

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  

Hope this helps :) 

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Color convergence messed up

you can get the convergence repair kit for your model that has both convergence IC and the six feed resistors at this link, The repair kit also has step by step instructions with pictures so you can do the repair your self. Heres the link.The 50H82 kit is the same for the 57H82,

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Toshiba 50h82 convergence issue

Projection TV sets have several common problems listed below.

Problem #1) Convergence


  • 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.


  • 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...


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All screen is red


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Toshiba 50H82 Wavy Lines - Jittery Picture.

Dont have the manual - sorry - but this is the most likely cause.

Projection TV sets have two very common problems listed below.

Problem #1) Convergence

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 more information and a DIY convergenece repair kit with instructions from the link below.

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

*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

bb0cf99.pngYou can see some more examples and find a fix using this link on Fixya

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Convergence problem

my convergence are having a problem the blue color won't moved

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Convvergence problem w/ Toshiba 50H82

You need to replace following ICs, may be 2 pieces in your tv for convergence problem.
IC, STK392-110T

Toshiba Part Number: 23135090X
Please search on net for availability in part stores

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Toshiba 50H82 blue arcing?

color shadows on numbers or letters indicate a possible convergence problem.. might be a crt deflection problem.

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Touch Screen Error

RED GUN OK, you need convergence IC's replaced = Toshiba
part # STK392-110T.....................................T.

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