Question about Philips Magnavox 51MP392H Rear Projection Television

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TV Contrast Problem for Philips Magnavox 7P4830 W101

There's no contrast or hue setting for my tv. The picture color is out of focus

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  • Philips Master
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Your TV most likely has one or more possible problems.

Problem #1: Convergence Chip Failure ( common problem )

Here are some of the most common symptoms and example photos of a convergence problem

  • 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 Contrast Problem for Philips Magnavox 7P4830 W1 - 701cb04.jpg

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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 directiTV Contrast Problem for Philips Magnavox 7P4830 W1 - 2c07611.pngnvergence chips are bad and should be replaced. This is a common problem.

2c07611.pngSolution #1

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 note and they will put one together for you. Their kits include a photo instruction guide, original OEM Sanyo STK chips, convergence resistors, pico fuses, etc.


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.
TV Contrast Problem for Philips Magnavox 7P4830 W1 - 578ba6c.jpgef="http://www.fixya.com/support/t1631691-red_aura_in_middle_55_phillips#" >Picture of a set that needs the fluid changed.


TV set after fluid change

65af323.jpg

2c07611.pngSolution #2


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

Posted on May 19, 2009

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Posted on Jan 02, 2017

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