Sanyo 50749 PLASMA help!!!!

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  • jgrice53
    Senior Member
    • Dec 2012
    • 63
    • usa
    #1

    Sanyo 50749 PLASMA help!!!!

    This is my 1st post to this forum so I hope I am doing it right. I have a sanyo 50749 that came in with clicking on and clicking off after a few seconds. I got the SM and started the troubleshooting. It narrowed down to the buffers. So I replaced both buffers and the TV turned on and stayed on and the picture popped right on, except it had horizontal lines, so I began reseating the ribbon cables to the panel.
    After a few tries, I had the top half with no lines and most of the lines out of the lower half. I was unplugging the set time that I reseated the cables but all of a sudden the TV would not turn on anymore. It was back to clicking on for a few seconds and then off.
    The power supply brings up the correct voltages when powered on before the set shuts down. I have gone back through the troubleshooting several times and it passes all the tests but the only way the smtp will stay on is with the LVDS from the main to the digital and the ribbon cables unplugged from the digital board to buffer on the bottom. Does anyone have any ideas how to determine which board is defective?
    Attached Files
    Last edited by jgrice53; 04-29-2014, 01:06 PM.
    Tags: None
    • tw2005
      Badcaps Legend
      • Oct 2011
      • 6458
      • Australia
      #2
      Re: Sanyo 50749 PLASMA help!!!!

      you were'nt reseating these whilst the TV was running by any chance?

        Comment

        • jgrice53
          Senior Member
          • Dec 2012
          • 63
          • usa
          #3
          Re: Sanyo 50749 PLASMA help!!!!

          no, i made sure to unplug the power cord each time. the only thing i was thinking was if i didn't wait long enough from the time i unplugged the power to the time that i reseated a cable. what is puzzling me is that the SM says that if TPVSUS has 193v before shutdown that the SC board may be defective, but disconnecting the LVDS cable from the main to digital board and the ribbon cables from the digital board to the buffers on the bottom the smps will turn on and stay on

            Comment

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