Question about Toshiba TN55X81 55" Rear Projection Television

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What powers the picture tubes in a 55 inch model tn55x81

I get sound but no picture and it is not the picture tubes

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The tubes in the projection set among other things need: 200 volt screen source, filament voltage and high voltage.

Note that if set for example has a loss of vertical or horizontal sweep this will be detected and the tubes will be shut off to prevent the tubes from getting a burn mark on their screens.

Posted on Nov 06, 2012

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I have a toshiba model tn55x81 and i get sound but no picture


The tubes could be shut off for a number of reasons- no 200 volts, no filament voltage, no high voltage.

set will also blank (cut them off) if a vertical or horizontal deflection problem---

things would have to be tested for voltages etc to see what the issue is.

Nov 06, 2012 | Toshiba 55H70 55" Rear Projection...

1 Answer

Red color is off alignment. Picture is blur. how to re-align color on TV?


Sounds like a convergence failure, here is a tutorial I made:
http://www.fixya.com/support/r5001731-convergence_diagnosing_convergence
Let me know if I can be of further assistance.

Sep 09, 2010 | Toshiba TN55X81 55" Rear Projection...

1 Answer

Center bow on picture top and bottom with 1" black showing


Projection TV2_bing.gif sets have several common problems listed below.

Problem #1) Convergence

Symptoms:

  • Screen Looks 3D
  • Colors wont align
  • Screen may look distorted
  • No Audio/Video - TV2_bing.gif makes a chirping sound.
Problem #2 CRT Fluid has clouded over. Symtoms
  • Dull looking video
  • White looking video
  • Halos around objects
  • Red/Orange looking video

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

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

Mar 06, 2010 | Toshiba TN55X81 55" Rear Projection...

1 Answer

Blue dots on 50 inch hitachi projection tv


Your blue picture tube is brighter than the other tubes. Try to do a convergence on it. If that doesn't do it, it sounds like you blue picutre tube is getting ready to blow. It is the same principle like a light bulbs. You know how they get bright and in a next few days they blow. That stands true to a picture set.

Dec 07, 2009 | Hitachi 55VS69 55" Projection HDTV

1 Answer

I have a Toshiba TN55X81 that has sound but no picture. Turned it one one day and no picture. I don't see any error code blink when I power on the set.When the set is turned off a line flashes across the...


It shouldn't be the convergence chips. You may have blown a pico fuse on the power board.
You should be able to safely remove the convergence IC's and try the tv without them as they only do image correction.

Oct 13, 2009 | Toshiba TN55X81 55" Rear Projection...

1 Answer

Blue convergence


They should be STK392-110 ICs you can get replacement ICs at the following link with free instalation instructions
http://servicemanuals.vstore.ca/

Jun 04, 2008 | Toshiba TN55X81 55" Rear Projection...

1 Answer

Broken Mounting bracket Toshiba TN55X81


new braket hard to get on this model i loked all over i would use e poxy like u said should be fine

Feb 03, 2008 | Toshiba TN55X81 55" Rear Projection...

1 Answer

Toshiba TN55X81


Blue Convergence IC is bad = change both for reliable repair..
located on largest heatsink on chassis.............T.

Feb 02, 2008 | Toshiba TN55X81 55" Rear Projection...

1 Answer

Convergence and audio problems


1)replace convergence IC's w/best quality. re-align as needed. 2)recheck audio,source and selections in menu. PVAT!

Sep 29, 2007 | Toshiba TN55X81 55" Rear Projection...

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