Plasma Screen Test?

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  • uberplasma
    Senior Member
    • Oct 2011
    • 85
    • Canada
    #1

    Plasma Screen Test?

    Hi Everyone
    Where I live, there is no garbage pick up, everyone hauls their "stuff" to one of numerous landfills. At these landfills there are numerous Plasma Tv's, all missing the PCB's(hoarded by a guy who has no idea how to fix a burnt out light bulb), they all seem intact, connectors and screen look undamaged.
    Is there a way to test the screen with out the specific units boards? Is there some way to light up the board like with a say "generic" test circuit, there are so many and I'm sure they could be used by people who are capable of performing the screen swap.
    Any Ideas?
    Tags: None
    • PlainBill
      Badcaps Legend
      • Feb 2009
      • 7034
      • USA
      #2
      Re: Plasma Screen Test?

      Originally posted by uberplasma
      Hi Everyone
      Where I live, there is no garbage pick up, everyone hauls their "stuff" to one of numerous landfills. At these landfills there are numerous Plasma Tv's, all missing the PCB's(hoarded by a guy who has no idea how to fix a burnt out light bulb), they all seem intact, connectors and screen look undamaged.
      Is there a way to test the screen with out the specific units boards? Is there some way to light up the board like with a say "generic" test circuit, there are so many and I'm sure they could be used by people who are capable of performing the screen swap.
      Any Ideas?
      It can't be done for a plasma panel, it MIGHT be possible with a LCD panel.

      This training manual contains a section on how to put a specific Samsung plasma panel into self test (stand alone) mode. To do that you will have to have the buffers, sustains, and main logic board as well as the proper power supply at the right voltages, and there are about a dozen adjustments that must be done to get it working.

      With a LCD panel it appears there is an equivalent function on most tcons (although I have never seen it documented). For that you will again need the proper power supply and at a minimum a CCFL tester.

      PlainBill
      PlainBill
      For a number of reasons, both health and personal, I will no longer be active on this board. Any PMs asking for assistance will be ignored.

      Never be afraid to try something new. Remember, amateurs built the ark. Professionals built the Titanic.

        Comment

        • tom66
          EVs Rule
          • Apr 2011
          • 32560
          • UK
          #3
          Re: Plasma Screen Test?

          If you have a variable high power signal generator capable of putting out a square wave from -200V to +200V at at least 1.5 amps, then yes - it may be possible. I'm guessing this is not standard equipment.

          Maybe it's possible to use mains voltage, wouldn't bet on it. Probably blow the panel up.

          Here someone demonstrates how 12kV can light up a panel: http://www.youtube.com/watch?v=HxNd97PIar0

          However the panel is very quickly damaged by this due to internal arcing.

          --

          With LCDs you might not even need the CCFLs to light up. You can look carefully at most LCDs for damage to the screen; when off, certain parts look a bit darker than the rest. This won't catch all types of damage, for example on the edges it will be quite difficult to see the damage.
          Please do not PM me with questions! Questions via PM will not be answered. Post on the forums instead!
          For service manual, schematic, boardview (board view), datasheet, cad - use our search.

            Comment

            • retiredcaps
              Badcaps Legend
              • Apr 2010
              • 9271
              #4
              Re: Plasma Screen Test?

              Originally posted by uberplasma
              Hi Everyone
              Where I live, there is no garbage pick up, everyone hauls their "stuff" to one of numerous landfills.
              Sounds like an opportunity to place local ads offering free recycling services for electronics to your fellow citizens so they can save time, gas, etc.

              A few people do this where I live. They get free parts and the people who don't want their stuff save time, gas, and busting their backs.

              Originally posted by uberplasma
              hoarded by a guy who has no idea how to fix a burnt out light bulb
              This sounds like the same guy who told you an electronics course was a waste of time?
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                Comment

                • uberplasma
                  Senior Member
                  • Oct 2011
                  • 85
                  • Canada
                  #5
                  Re: Plasma Screen Test?

                  I wonder how they test them at the factories? actually the guy who hoards the boards is a ying yang who has spawned other ying yangs one being the local repair guy,who said it was a waste of time, and he does it because he doesn't want his son to have the parts because he didn't hire his sister to sell their house back in '87 before they moved onto pine st.....
                  I am advertising free pick up of DLP, LCD/LED and plasma TV's for free, got 2 already, 1 up and running and offered ying yang Sr a case of beer for the stash of parts, he said bottle of whiskey and its a deal, so I will be off to the liquer store and grab a 10$ bottle and put it in my single malt bottle - hahaha
                  Thanks everyone for the input, gives me some things to think about

                    Comment

                    • tom66
                      EVs Rule
                      • Apr 2011
                      • 32560
                      • UK
                      #6
                      Re: Plasma Screen Test?

                      http://www.youtube.com/watch?v=uq9pZ...eature=related

                      4.30

                      Notice the oscilloscope and the custom equipment for driving the PDP.
                      Please do not PM me with questions! Questions via PM will not be answered. Post on the forums instead!
                      For service manual, schematic, boardview (board view), datasheet, cad - use our search.

                        Comment

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