Question about Sony KP-51HW40 51" Rear Projection Television

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Red area/red line on tv screen

I have a Sony Projection TV and on the bottom right i have a red area, i was told once it's because the mirrors need to be adjusted, but i'd like more feed back on this.

Also, every once in a while upon turning on my tv there is a horizontal red line running through the center, i usually fix it by tapping the back part or fiddling with my tv input cords. can anyone help me please?

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  • cosmic_knowl Dec 15, 2009

    hmm yea no speakers near by that could cause it. the previous owner had told me the color wheel was shot, what exactly would that mean? and if i got the chip how would i change it out with the old one? Thank you for your input :)

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Odds are it is your convergence chips! If you have any colors out of alignment, thats what it is. Also if you had a speaker too close to the Tv it can cause colors to shift. There should only be 1 mirror. IT would have NOTHING to do with your problem. If you are only have problems with the red, just replace the one STK chip. They run about $20-30 on ebay. $5-10 if you buy china made. Usually the cheap ones dont get along with sony.

Posted on Dec 12, 2009

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Red, green, and blue lines at bottom of screen, mirror looking effect, also looks like 3D. Got at a garage sale so no manual.


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. Power light will blink. TV may also make a chirping noise.
Here are some photos of convergence problems.

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Here is a quick test....

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

Try to adjust the red and then the blue convergence.

You should be able to move RED and BLUE in all directions - up, down, left, and right. And you should be able to get the grid straight.

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

Note: If you TV has as flash focus or magic focus button only try pressing the button. If it fails to fix the convergence your need to fix it. See below for a fix

69189a5.pngCONVERGENCE SOLUTION

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

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This is a convergence problem. You will need the stk's changed and a pico fuse or 2. also from looking at the pic you might want to clean the lenses and mirror after the repair to bring back some of the vibrant colors the set once had when it was new. This repair should run you anywhere from $300-$500 depending on your area and the tech that comes out. If you need more information or would like to try to fix it on your own please let me know.

Tim

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The screen is not lineing


Depends on what make and model you have. If you have a Samsung projection TV, you only have to adjust the DMD board (Digital Mirror Display). If you have a Zenith or Sony projection TV you must adjust the projection lens.

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Lines on my screen


Try this link it has many great reviews. Very informative for the DIY. The description of your problem was very vague. If this helps great.

http://www.somelifeblog.com/2007/06/sony-projection-tv-red-line-repair.html

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Sony Grand WEGA KDF-50WE655 Parts Numbers Needed


1-788-159-21

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A-1087-018-A

 

here are your part numbers for the 2 screens and mirror

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Red Lines on Screen


Dave, HMMMM Dual pictures This is a problem that every projection TV runs into at least once or twice in its lifetime. Its the old convergence IC falure thingy. These IC's go bad and should be replace all at once. These are not consumer replaceable unless you have had training in the electronics or TV repair fields. Please call out a pro to assist you with this repair as A TV is not the place to experiment in because of the HI voltage and saftey issues. Good Luck

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