Question about Toshiba 42H81 42" Rear Projection Television

1 Answer

The red color is not aligned anymore on my Toshiba

The red color on the left half of the screen is not aligned anymore on my Toshiba 42H81 projection tv. What can I do to fix it?

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  • franzbg Nov 16, 2009

    Can you tell me what is involved in this repair and the Ebay seller you mentioned? Also, how can I tell which 1.8 ohm protect resistors are bad? Thanks!

  • franzbg Nov 16, 2009

    SD TECH--
    I searched sewsles55 with no result, so I searched Suburban Electronics and found the page, however, they have no listings.

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This model uses two of the STK-392-110 convergence IC chips.

Both of them need to be located and replaced--along with any of the several 1.8 ohm protect resistors around them that are bad.

The hard part in this model is getting at the chips--I can tell you what is involved if you or someone you know can do the repair.

Considering that total parts cost if you buy the chips on Ebay (I can tell you the best seller there) will be under 15 dollars plus shipping, if you can do this you can save the set and a LOT of money.

Most shops are going to get 300 or more for this repair.

Let me know if you HAVE QUESTIONS or need more information--I am here to help people.

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

SD TECH

Posted on Nov 16, 2009

Testimonial: "Extremely helpful solution!!"

  • SD Tech
    SD Tech Nov 16, 2009

    First is the seller is on Ebay--select search, then advanced search, then search by seller--enter sewsles55--the company is called Suburban Electronics, I buy a lot of parts from them--check them out

    SD TECH


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Related Questions:

1 Answer

Colored lines down the tv


old tv. don't put anymore money in it. get you a nice flat screen. not work it being a projection. jmo

Oct 08, 2014 | Toshiba 42H81 42" Rear Projection...

1 Answer

My picture is wavy and out of focus. when i touch the auto focus it goes through the function but ends with failure. it is a toshiba 42h81.


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 14, 2010 | Toshiba 42H81 42" Rear Projection...

1 Answer

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:
5f6e85c.jpg
Problem #2 CRT Fluid has clouded over.

Symptoms


  • Dull Video, Washed out
  • White/Bright looking video
  • Halos around objects
  • Red/Orange looking
Example Photo:
ee1ca68.jpg

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

bb0cf99.pnghttp://www.fixya.com/support/r2861467-solution_video_looking_whiteish_dull

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

1 Answer

Bottom left corner of my toshiba 65h83 is blurred with color distortion mainly magenta and green. Distortion Is a half moon shape with the open end facing the edge of the set. Total distortion takes up...


Have you tried the "Magic Focus" Button/Option in the Menu Setup Screen? If you have and it still is there, You Have a Burned out Color Tube. It is Cheaper to Throw it away and Buy a New one.
Good Luck..

May 12, 2009 | Toshiba 42H81 42" Rear Projection...

1 Answer

2002 Toshiba 42H81 color blue will not align


one of the amplifiers on the convergence circuit is not working

Dec 02, 2008 | Toshiba 42H81 42" Rear Projection...

1 Answer

Convergence -manual


Replace the convergence amps and test and replace any or all of the 2.2ohm resistors in the yoke return path out in front of the amps. This unit takes two STK392-110 Sanyo originals, DO NOT GET CHINESE KNOCK-OFFS... Buy them from Acme sales out of Florida and you can be assured they're originals.
Bill

William Rayburn, CET
Premium Technologies
PO Box 442
Long Beach, WA. 98631
360-642-4993

Oct 11, 2008 | Toshiba 42H81 42" Rear Projection...

1 Answer

The touch focus


Will the red align in all 4 directions in the other areas of the screen? If it moves in all 4 directions everywhere but one section its probaly a resistor near your convergence amplifiers. If the red wont move in all 4 directions anywhere, then its your Convergence amp ICs faulty. Cost about 20.00. Hope this helps.

Jan 12, 2008 | Toshiba 42H81 42" Rear Projection...

1 Answer

Toshiba 42H81 42 in. Rear...


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.

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

1 Answer

TOSHIBA REAR PROJECTION TV 42H81


FIRST DO MANUALY (THE ALIGNMENT OF CRT'S)

May 12, 2007 | Toshiba 42H81 42" Rear Projection...

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