Question about Samsung SP-R4232 42 in. Plasma HDTV

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Plasma tv sparkles on black background dark screen gets white spekles after been on around an hour then can sometimes go off

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  • Cedric Hamilton May 11, 2010

    What is the normal voltage on those. I got almost 200 VDC. Is that
    right? I guess an oscilloscope would be the best way to make the
    adjustments but if you don't have that can you wait until it is
    happening on a regular basis and then adjust it off? Is the reason it
    is happening because of overheating due to the voltage being to high?




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Ned to adjust the VS-voltage or the VSCAN-voltage

Posted on Jul 20, 2008


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Hi, I have a 50 inch Panasonic Viera TC-P50G25 Plasma TV. It worked great the first four months. Around the 5th month, white little blinking sparkles were all over the screen, and of course, they could be...

You are going in the right direction. Use that warranty to the MAX!

In a nutshell, the problem is probably related to the sets power supply.

I have answered quite a few plasma TV problems and most are centered around the power supply.
It takes a huge amount of current to "ignite" the plasma to get it to glow. Once it is lit, current is constantly fed by scanning through over a thousand "power" lines on one side of the screen and scanning over a thousand "address" lines on the other side. The sparkles and lines can be a secondary effect of its not being able to regulate voltages correctly.

The power supply in a plasma set has its work cut out for it and it is very important to make sure that it gets the ventilation you manual says it needs.... blocking the vents can quickly overheat a plasma set.

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3- The screen itself is made of common "soda glass" - the same as window glass, and is usually 1/4" thick on each side (a little over 1/2" total) and this accounts for most of the sets weight. Between the two glass plates, there is a small gap that is made by fusing thin glass rods into the screen. In this gap is a vacuum, with a small amount of a rare gas mix added. Be careful not to hit the screen because if it cracks, vacuum integrity is compromised, the gas escapes, and your TV will be worthless.

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