Question about Philips 55PP9401 55" Rear Projection Television

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Rear projection Double picture and writing on the picture screen

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  • sdtafford1 Mar 10, 2009

    Philips tv words and picture are double and blurred

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  • 3,459 Answers

Your TV most likely has one of two 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.
rear projection - 701cb04.jpg
77ea520.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 directions your convergence 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.

Picture of a set that needs the fluid changed.
TV set afrear projection - 65af323.jpghange



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 Mar 15, 2009

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  • Contributor
  • 8 Answers

Bad convergence ic's and maybe a resistor bad, the're located on the left board mounted on big silver heat sinks. the resistors are on the left of them facing the back stk392-120

Posted on Dec 14, 2008

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Hello Tim this is a very common problem with the projection tv set, the problem is coming from the convergence board with faulty ICs that have to replaced in order for your tv set picture to work properly,they do sell convergence repair kits for your tv set but i would not recommend this the reason being is that if you make a mistake while changing out a component your whole tv set is gone not going to work anymore so for this i would recommend for you to call a near by tv repair shop and have a tech come out and change this ICs for you, after you change this ICs from the convergence board your tv set should go back to working normal on the link below you can check out how a convergence board looks like thank you hope this helps.

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