Samsung plasma psu

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  • leonard
    Leonard085
    • Aug 2010
    • 10
    • Ireland
    #1

    Samsung plasma psu

    I have a psu pcb that the vs and va voltages shut down after about 3 minutes working
    I checked for poor solder joints, all ok
    psu pcb type BN44-00442B
    has anyone got a schematic?
    Tags: None
    • kc8adu
      Super Moderator
      • Nov 2003
      • 8832
      • U.S.A!
      #2
      Re: Samsung plasma psu

      resolder everything mounted on a heatsink or that gets hot.

        Comment

        • Panzer_green
          New Member
          • Aug 2014
          • 2
          • Australia
          #3
          Re: Samsung plasma psu

          I have a samsung plasma too (ps51d6900dm) turning on issue.
          The problem is the tv turns on and gets to the logo but then turns off! tries 3 times and for safety reasons stops trying to turn the tv on i believe.
          I did a few checks and by no means am i very knowledgeable when it comes to fixing tv's but i checked all my voltages and they seem to be fine and disconnected other boards yet still came to the conclusion its the power supply.

          I then heard about heating the board with a hairdryer to see if it turns on! which it did turn on. So i isolated it to a part of the board and found when i pushed on the IC the tv stayed on when not heated. I then believed it was a cold solder joint. It worked after re soldering this area for a week! then the same problem happened again! Is this part likely to be causing this problem and if so where can i get this part as i have had no luck looking myself!

          Photo of IC i believe is faulty! in link
          http://www.avsforum.com/forum/attach...7&d=1408930516

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