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Colors (tube tv) periodically become bright and flicker

On my Panasonic color tube tv (7yrs old) the colors periodicaly become "neon" like (very bright, not realistic) and starts flickering for a couple of hours than it stoppes for a while and shows normal picture again.

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This sounds like one of the tubes is shorting out ,or have you or do you know if your tv tubes have been serviced and the fluid checked in them reciently.i know sone tv proj carries some kind of solution in the tubes to keep them running cool ,call a service rep or the panasonic co and ask them tech support

Posted on Apr 16, 2009

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Your TV most likely has fone of two possible problems.

Problem #1 - Failure in the convergence circuits. ( common problem )

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


  • Screen looks 3D
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Here are some photos of convergence problems.

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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.

0667c5f.pngSOLUTION

You will need to replace the convergence chips and possibly some convergence resistors and pico fuses. Its a fairly easy DIY job or you can call in a pro. If you want to do the repair yourself check the site www.TvRepairKits.com. Their kits include a photo instruction guide, original OEM Sanyo STK chips, convergence resistors, pico fuses, thermal paste, email/phone support, 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. Notice how dull the colors are and how white the screen looks. The screen may also look red, orange, dull, etc.

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TV set after fluid change. Notice how bright the colors are now. Everthing looks crisp and sharp again.

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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.

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