Question about Toshiba 42H81 42" Rear Projection Television

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Toshiba 40who8b convergeance problem

Picture bows up from bottom coloures out of line

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  • mketre Jul 10, 2008

    I had the exact same problem one year ago, blue out ovf convergeance. I brought the unit to a repair shop, they replaced 2 ICs (not sure if they are "t" or not) and the set worked great for exactly one year ($350 parts and labor). Today the same problem happened. Should I repair it again or am I thrownig money down the drain. The set is 7 years old.



    Matt

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  • Master
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Good Day, harri1234;
Sounds like a convergence problem.
Convergence Output IC Failure
Corrective Action: Replace the defective Convergence Output IC Part Number 23905094 (STK392-110) using the revised “T” version IC Part Number 23135090 (STK392-110T). When Convergence Output failure is
detected, it’s recommended that both IC’s be changed to the “T” type IC
version.
Good Luck, Big Irish.

Posted on Jul 10, 2008

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Picture is distorted......bowes inward. Colour is


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.


7859b01.jpg

e87380c.jpg
69189a5.pngSOLUTION #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.

578ba6c.jpg
TV set after fluid change

65af323.jpg

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

Apr 21, 2011 | Sony KP-57WS500 57" Rear Projection...

1 Answer

My Toshiba projection screen TV the picture is bowed and the colors don't line up


3d colors not lining up poblem dicates "convergence issues.. bowing piture may indicate complete faliure of convergence alignment cuircits... depending on model the most likely cause will be 2 micochips (ic's called stk<s)

Aug 23, 2010 | Toshiba Televison & Video

1 Answer

There is a wave/bow in the bottom and top of the picture on the screen of my Toshiba 70HX50. When I am in the grid screen in the service mode, it looks like the center is 'bowed' out. How do I adjust this...


Slight error in the alignment of a projection TV is pretty much normal. If the problem cannot be seen on a normal TV picture, I would not spend the money.
However, if the problem is severe and causes colour double images, it is convergence and will need parts replaced - about $200-$600 depending on service call, parts, labour, etc.
Minor adjustment takes a skilled technician. attempting it yourself will likely cause the set to stop functioning. (Digital adjustment is not forgiving)

Mar 30, 2010 | Toshiba 43H70 43" Rear Projection...

1 Answer

Rcs hdtv multiple images


The problem you're having is due to the failure of the convergence amplifier circuit. In that circuit are some components which amplify or control the signals to the dynamic convergence yokes, which line up the red green and blue images to superimpose them over each other to create a proper colour picture. When you get a failure in that circuit, it no longer aligns the images properly, and generally you get what appears to be badly set geometry in multiple colours. In some cases you will also get a problem with the part of the power supply that supplies the convergence amplifiers, or the digicon, which is the digital convergence control module.

Jun 12, 2009 | Hitachi 43FDX01B TV

1 Answer

Toshiba v43j22p 42" red shadows and lines over screen


6b5ee7e.png You may have a convergence problem. Here are some of the most common symptoms.

  • 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.
Here is a quick test....

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

Try to adjust the red and then the blue convergence.

You should be able to move them up, down, left, and right.

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


You need to replace the convergence chips and convergence resistors. Check the site www.TvRepairKits.com. They have put together a kits for most models. If you don't see a kit for your set send them a quick email and they will put one together for you. Their kits includes photo instruction guides, original Sanyo STK chips, convergence resistors, pico fuses, etc.

Feb 02, 2009 | Toshiba 57H81 57" Rear Projection...

1 Answer

RCA Projection TV Model #p46921, Has bowing effect of pictures


Go to Menu then setup look for convergence if you do not see convergence on menu then you have a open FUSE FL231 it is on right side of FBT flyback transfomer there is 3 of them small brown rectrangler looking caps it will be the one in the Middle.

Jan 31, 2009 | RCA R52WH73 Projection Television

2 Answers

Colour problem


6b5ee7e.png You may have a convergence problem. Here are some of the most common symptoms.

  • 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.
Here is a quick test....

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

Try to adjust the red and then the blue convergence.

You should be able to move them up, down, left, and right.

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


You need to replace the convergence chips and convergence resistors. Check the site www.TvRepairKits.com. They have put together a kits for most models. If you don't see a kit for your set send them a quick email and they will put one together for you. Their kits includes photo instruction guides, original Sanyo STK chips, convergence resistors, pico fuses, etc.

Dec 31, 2008 | Toshiba 42H81 42" Rear Projection...

1 Answer

Colours split and vertical bowed green line at to and bottom of s


This is a convergence problem that can be either poor solder connections at the convergence ICs or defective ICs. If you can solder and feel comfortable working inside the set where there are potentially dangerous high voltages, update this and further details and instructions will be provided.

Thanks,
Dan

Dec 12, 2008 | Samsung HLN5065W 50" Rear Projection...

1 Answer

Toshiba 40who8b convergeance problem


thats the one model Toshiba that I am not very famillar with, but i will try to dig up the chassis info and repost when I have the info in front of me.

Jun 23, 2008 | Televison & Video

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