Question about Projection Televisions

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I have a panasonic pt-47wx49e color video projection system and there is a blue rainbow that come off the horizonal direction of the words on some shows and the people have a yellow double vision off at the bottom of their bodies. can you help.

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  • Brian Oct 20, 2008

    The Tv is about 7 years old where is the color wheel and is this a convergence problem

  • Brian Oct 20, 2008

    what is the convergence setting suppost to be?

  • Brian Oct 20, 2008

    My convergence in red and green adjust up and down side to side , the blue adjust up or side to side it will not move down to settings.

  • Brian Oct 20, 2008

    I can adjust the convergence in red and green but blue only adjust to right and left and up it wont adjust down.

  • Brian Oct 27, 2008

    thank you this was right on the money, I never done any electronics work but I tried it. not so bad. I changed the stks and it worked only now have lines in picture until it warms up can you help on that. thanks again

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This is the conversion IC's STK392-110 , it controls the vertical the horizontal and color alignment
to have a tech come and replace this is about $300 or more

Posted on Oct 20, 2008

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The stk`s are bad and need to be replaced. also there might be a few bad resistors. your convergence circuit is bad.

Posted on Oct 20, 2008

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Hello!
You need to replace the red drive and the blue drive convergence ICs. They are located on large,finned heatsinks. The chips stand vertically and are bolted to the heatsinks. They have about 20 pins each to unsolder\solder. The number on the chips start with "STK-" and then have numbers that follow. These parts are available from http:\\www.tritronicsinc.com or any consumer electronics parts supply source.
If you plan to do it yourself and save big $ let me know and I'll assist you further. Good Luck!

barneyluc

Posted on Oct 20, 2008

  • Barney Lucas Oct 20, 2008

    After I submitted my initial solution I saw the previous posts in response to your question. There is not a convergence alignment that you can perform...sets under 10 years old are all digitally converged. Please refer to my previous post for the repair of your unit. Thank you!

    barneyluc


  • Barney Lucas Oct 20, 2008

    Hello again, I see that you're telling someone else that you can adjust the convergence...which is news to me...I didn't realize that there was a projection tv under 10 years old that still allowed you to adjust convergence.
    Anyway, as I said before, you need to change your convergence ICs. That is the ONLY solution that you have to fix the problem you described. Whenever one of the colors won't move in one of the directions...changing the convergence ICs is the only choice you have.

    barneyluc

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Dear,

get the service manual from this site... hope it will help to cure it
http://www.asm-service-manual.com/

regards,

if want  further information then dont rate it till satisfaction

Posted on Oct 20, 2008

  • SALMAN NASEER Oct 20, 2008

    dear,

    did u check this link
    http://www.fixya.com/support/t335667-pan...

    here is the discussion about this kind of problem and it solved ...checked it by the way


    regards,

  • SALMAN NASEER Oct 24, 2008

    dear,
    did u tried what i suggested....

    regards,

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It seems to convergence problem ............ check the convergence settings............there is chance of power supply problem ...........

Posted on Oct 20, 2008

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That means that is time to replace the color wheel, how old is the tv?

Posted on Oct 20, 2008

  • Ginko
    Ginko Oct 20, 2008

    On a rear projection the picture is projected to the screen from lights passing throught a color wheel.
    when this part starts beinfg defective, you get aura, double vision, intense light, and rainbow on the screen.
    You will need to replace the color wheel.


  • Ginko
    Ginko Oct 20, 2008

    If it is convergence, you will just get double vision, or whole TV picture has curved bands at the side. When it is convergence the technician must test the convergence ICs and eventually replace them.

    See here YouTube - rear projection convergence problem

    If it is color wheel you get shades, rainbows, or intense lights , auras, wrong colors and some times double vision.

    Color wheels problems may be often mismatched with convergence problem.

    For example here is a typical color wheel problem, even if many posters are believing it is a convergence problem:

    Panasonic rear projection tv TX-51P100 troubleshooting help




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1 Answer

The color goes out on my panasonic PT-47WX49E TV.


Projection TV sets have two very common problems. One is convergence ( 3D/Warped video) the other is CRT fluid ( Dull Video). Below are more details for both items. Also, complete repair kits with instructions and repair support are avail from site such as www.TvRepairKits.com

Common Problem #1) Convergence has gone out

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. The power light will blink. TV may also make a chirping noise.
Here are some pics of convergence problems.


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69189a5.pngSOLUTION #1

What you will need to do is convergence. You can get a repair kit from TvRepairKits.com . It includes replacement parts,step by step instructions, support, etc.

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.

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TV set after fluid change

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69189a5.pngSOLUTION

What you will need to do is replace the coolant and clean the crt. You can get a repair kit from TvRepairKits.com . It includes replacement coolant,step by step instructions, support, etc.

May 11, 2012 | Panasonic PT-47WX49 47" Rear Projection...

1 Answer

The Panasonic mod# pt-47wx49e has started to have a blue and a yellow shadow on the right side of the screen. the rest of the screen is normal. The operating instructions give you diddle to on. Do you have...


Ur tv have a problems known as a convergence problems,it dead.The tv colors lines R,G,B mis alignments,have colors shadows or 3D colors pictures.The tv convergencce board the 2 STK convergence ICS and some or all it resistors are dead.These parts must be replaced to solved the tv picture convergence problems.The shop,will cost u $300-350 for parts and labors.

Oct 10, 2010 | Panasonic PT-47WX49 47" Rear Projection...

1 Answer

Panasonic PT-47WX49E blue convergence problem.


if convergence does not adjust in menu mode could be a defective convergenceic or fuse

Nov 11, 2009 | Panasonic PT-47WX49 47" Rear Projection...

1 Answer

PT-47WX49E Blue and Yellow Shadows!! Help me


Have a qualified repair shop come have a look and give you an estimate. If it's the optical block it's probably not worth repair.

Sep 22, 2009 | Panasonic PT-47WX49 47" Rear Projection...

2 Answers

Rainbow on the screen


Do you have any larger speakers close to you tv. Or any magnets been neer it. If you unplug it for a while the tv should have remove the rainbow

Aug 28, 2008 | Panasonic PT-53TW53 53" Rear Projection...

1 Answer

Green rainbow streak on bottom of TV PT-47Wx49E


If Convergence on setup dosen't work, And you think its not STK Convergence chips!, Then "Yes" It more then likely will have a few open Resistors!... (Near STK chips)

Jun 24, 2008 | Panasonic PT-47WX49 47" Rear Projection...

1 Answer

Blue ghosting on Panasonic PT-47WX49E


your convergence IVs need to be replaced. Its an easy repair if you can solder. you can get the two ICs you need at the following link. they also provide free installation instructions and free on line tech support while youre doing the repair. You need two ICs they are numbers STK392-110. Let me know if I can be of further assistance. I am one of servicemanuals support techs and board rebuilder.
http://servicemanuals.vstore.ca/

Apr 11, 2008 | Panasonic PT-47WX49 47" Rear Projection...

47 Answers

PT-47WX49E Service Manuals


scott iam in need of one too would you PLEASE add me to your list Thanks so much

Apr 11, 2007 | Panasonic PT-47WX49 47" Rear Projection...

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