Question about Sony KP-61V90 61" Rear Projection Television

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Sony KP-61V90 61 in. Rear... Problem

I have had thi tv since 2002 and have had no probs. Last night my daughter hit the flash button and the center colors areout of focus. have pushed the flash button and tried adjusting colors, but the center of the screen just won't come back into focus. Any help with this would greatly appreiciated.

can contact me at charly_burton@yahoo.com

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  • soju4 Aug 30, 2008

    i have the same problems any one have any suggestions.

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  • Sony Master
  • 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.
Sony KP-61V90 61 in. Rear... Problem - 701cb04.jpg
77ea520.jpgf0900cb.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 shoSony KP-61V90 61 in. Rear... Problem - 2c07611.pngaced. 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.

578ba6c.jpgTV 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 Feb 28, 2009

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