Question about Sony KP-57WS500 57" Rear Projection Television

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Sony KP-57WS500 convergence drift

Hello,
I recently aquired a Sony 57" TV. I replaced one of the video driver IC's and a few resistors and got the set running. I seem to have a convergence drift problem. I can run the set four 4 hours, set the convergence in 480 and 1080 modes, save, and exit. After power-down and back on, I see a convergence shift within 10 minutes. Can someone point me in a direction to pursue? I have another set with a shorted CRT I can steal modules and parts from if necessary. Could this be a sign the convergence IC's are worn, power supply issue or convergence module?
Any ideas would be appreciated.
Thanks,
Dan

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  • Dan Smith
    Dan Smith Nov 15, 2008

    Well,

    I centered the geometry of all three guns and then performed convergence.

    It seemed to help stablize the convergence, but the set must warm up about 10 minutes. I'll replace the electrolytic caps on the convergence IC's to see if it helps.

  • Dan Smith
    Dan Smith Apr 28, 2009

    I replaced the electrolytic caps at the convergence amps and cleaned and applied new thermal grease. Seemed to help. Sold the set for $100.00 to make room for a Mitsubishi.

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  • Sony Master
  • 3,459 Answers

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. 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, Zenith, and others. You can get a convergenece repair kit wiith 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 - makes a chirping sound.
Problem #2

Another common problem is dull or washed out video.
Your TV 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 here
Sony KP-57WS500 convergence drift - bb0cf99.pnghttp://www.fixya.com/support/r2861467-solution_video_looking_whiteish_dull

Posted on Apr 03, 2010

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Posted on Jan 02, 2017

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Without service manual it would be difficult for you to understand our directions like what to check and where to go in TV etc.

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