Question about Philips Magnavox 51MP392H Rear Projection Television

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Distorted Picture and High Pitch Squeal

I recently received a Phillips Magnavox PTV710 MDL # FP4640W102 47" the picture is distorted at the top. Looking from left to right across the top you will see a U shape or half circle that extends down from the top at the center 2"-3" This shape is blacked out except for the little white lines running thru it as if following the circle. This causes a warped effect in the picture. I adjusted the convergance the best I could but could not do the Green geometry as I don't have a template. This seemed to help some and also brought the colors in some. I think it also may need a coolant change. The green is foggy and Blue is dirty. It has also developed an intermittent High Pitch Squeal. Any Sugestions??? Thank You

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  • Duane Baughman Feb 07, 2009

    Thanks for the reply. I've gone into the basic reb/blue convergance screen and I can move both in all directions. Here are a few pics of what my screen looks like. There is alot of backround light but take note of the color and the top center of the screen. The first pic highlights the bowed in effect.

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You may have a convergence problem. Here are some of the most common symptoms and example photos.

  • 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.
Distorted Picture and High Pitch Squeal - 701cb04.jpg
77ea520.jpg
f0900cb.jpg

Here is a quick test....

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

Try to adjust the red and then the blue convergence.



You should be able to move them up, down, left, and right.

If you can't move them in all directions your convergence chips are bad and shouldDistorted Picture and High Pitch Squeal - 2c07611.pngd. This is a common problem.


2c07611.pngSolution


You need to replace the convergence chips and convergence resistors. Check the site www.TvRepairKits.com. They have put together a kits for most models. If you don't see a kit for your set send them a quick email and they will put one together for you. Their kits includes photo instruction guides, original Sanyo STK chips, convergence resistors, pico fuses, etc.

Posted on Feb 05, 2009

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Posted on Jan 02, 2017

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