Question about Philips 55PP9401 55" Rear Projection Television

2 Answers

Partial convergence problem

Blue beam sagging at top of picture. Bottom of picture OK.

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  • Anonymous Mar 14, 2009

    Blue line starts to sags from upper-right and increases throught the upper-center of screen then increasingly increases apex and it goes back up to the upper-left. Lettering also sags down and left. Blue showding lower than initial objects.

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  • Philips Master
  • 3,459 Answers

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.
Partial convergence problem - 701cb04.jpg
77ea520.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 should be replaced. This is a Partial convergence problem - 2c07611.pnglem.

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.

PictPartial convergence problem - 578ba6c.jpga set that needs the fluid changed.

578ba6c.jpg
TV set after fluid chaPartial convergence problem - 2c07611.pngr />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 07, 2009

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  • 1 Answer

We have the same thing, had Sears TV repairman look at the set. He said it was convergence and that it would cost over $500.00 to replace the parts. And he charged $91.00 for the service call. Needless to say, we did not have him repair it, that's why I'm online now trying to figure something out.

Posted on Mar 26, 2009

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amikeq,

You may be experiencing the beginings of a failing convergence system. To align the beam there are two ICs which take the stored positions, set by you during a convergence alignment, and move the beams to line up on the green beam for a good picture. When the ICs fail your set will look 3D but in your case you may just be seeing a partial and intermittent failure exposing the blue beam momentarily. I have a tip at http://www.fixya.com/support/r4220499-change_projection_tv_convergence_ics which explains all this and how to repair the unit as well as where to get the parts at the best price.

Thanks for using FixYa and for the great rating. Please consider a testimonial. Thank you.

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