Question about Samsung PN50A530 TV

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My plasma not very clear has a lot off lines and dots

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Needs to have VS and VA voltages adjusted.

Posted on May 13, 2010

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How do I fix my LG 50PCd5 Plasma TV?


If you wish to get some details; visit the site linked here. Pull up older posts.
http://electronicshelponline.blogspot.com/
Line faults & possible causes to LCD & Plasma screen are given with illustrations. You can get an idea about the fault to an extent. Faults to all LCD & Plasma screen are similar, irrespective of its brand and screen size.
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Blue dots on my tv screen


The model indicated is a Plasma set and if blue dots in motion (moving) may be either on the MAIN board (processes all signal) or it is even possible to be a problem on the power supply board.

Most likely a shop repair as someone would have to look, order board/s and actually replace them to find which board is bad.

This is the nature of repairs in all Plasma sets.

Only boards are sold and no individual parts.

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My panasonic plasma has spots of bright colors where they shouldn't be.


If its four years old that is about the average lifespan of one of these sets; a guess would be either voltages drifting or off in power supply or one of the signal boards that processes information is going bad.

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Brand new lg plasma 60" flat panel tve has horizontal lines accrss the screen only half way up from bottom. When you go close to tv, it looks like lots of of dots.


Hello Fixya customer,

Thank you for your question.

The are a couple of possibilities here including the logic board, lower "Y" board, lower "Y" buffers, and PDP panel. The "Y" is divided into into the lower and upper half of the screen. An experienced technician can quickly isolate the fault upon inspection and verify the supply voltages.

Thank you for using Fixya, and if I can be of further assistance please let me know.

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1 Answer

White dots in plasma tv


The only thing you can try is to adjust the tiny control on the Y board, if you want to try do this. Open the set , set it up so you can watch it with the back off. now looking at the back on the left side you will see a circuit board larger connected to a smalled one or two that go to the screen edge . on the larger board look for a few small controls, mark their positions with a dark sharpy then turn each a little while looking at the dots to see if one makes them better or worse. If one control effects the dots try to center it for the least amount of dots, if no effect is observed when a control is turned return it the original position that you mark before starting. if the dots do not clear either the Y board is bad or the whole scfreen is defective.
gd lk
Eric

Aug 15, 2009 | Televison & Video

1 Answer

Pulsating Arc


Sounds like one or two of the power diodes are defective (open), producing a half wave pulse instead of full wave, giving it a dotting effect.

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1 Answer

Samsung Plasma TV has horizontal lines of colored dots


I have the same problem, currently searching for a solution. Have you resolved your problem yet? Looking to repair myself, any tips or ideas that you have/expirenced would be greatly appreciated. Thanks, Todd

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Hitachi Plasma EDTV has green dots flickering all over screen


that is called diffusion. that can be adjusted out in most cases by adjusting the y sustain pcb but can also be the main pcb, the logic pcb and panel itself but not likely.

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2 Answers

Red Dots


You can get rid of the red dots by adjusting the V-scan voltage down, it's on the panel sticker inside the unit, you can find the test point on the DC to DC pcb, and the adjustment pot is on the same board, lower it as you watch the screen and only lower it enough to rid the screen of the dots

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