Samsung UA50KU6000 50" Smart TV

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  • Electrix78
    Member
    • Nov 2018
    • 15
    • Australia
    #1

    Samsung UA50KU6000 50" Smart TV

    Hi all,

    Firstly, I am no technician so I am not sure what I am looking at, but I am handy with a soldering iron and will give most things a crack. I have a friends tv and it is stuck in a boot loop. Comes up with "Smart TV" on the screen and then cycles over and over. Now I am assuming that it is the control board doing this not the main power board. Would I be right? how can I determine which board is faulty. I have tried looking for schematics and drawings but cannot find anything. I am at the mercy of everyone here for help.

    The capacitors on the main power board look fine, no scorch marks or bulging tops. I have checked for dry joints and broken tracks. Anything else?

    I have attached two photos if this helps determine what I should be looking for.

    Thanks everyone.
    Attached Files
    Tags: None
    • sintv
      Member
      • Feb 2015
      • 37
      • scotland
      #2
      Re: Samsung UA50KU6000 50" Smart TV

      If you disconnect the lead between the 2 boards the set and backlights should come on. This means power board and screen is okay and your fault is on the main board.

        Comment

        • Electrix78
          Member
          • Nov 2018
          • 15
          • Australia
          #3
          Re: Samsung UA50KU6000 50" Smart TV

          Thanks sintv - I did as you suggested and sure enough the back lights did come on. So my next question if I may, is what should I look for to determine the problem on the LCD board? Any suggestions?

          Thanks
          Greg

            Comment

            • Electrix78
              Member
              • Nov 2018
              • 15
              • Australia
              #4
              Re: Samsung UA50KU6000 50" Smart TV

              Originally posted by sintv
              If you disconnect the lead between the 2 boards the set and backlights should come on. This means power board and screen is okay and your fault is on the main board.
              Hi Sintv

              I have identified what I think is a voltage regulator, looking at the component in question, the meaurements are
              Drain/Gate - 11.1v on / 0.7v off
              Drain/Source - 12.5v on / 0.6v off
              Source/Gate - 1.46v on / 0.00 off

              Do these numbers mean anything? I was thinking that if the same voltage is not on the output side as it is from the input, then something is wrong. Is this correct?

              Thanks
              Attached Files

                Comment

                • Electrix78
                  Member
                  • Nov 2018
                  • 15
                  • Australia
                  #5
                  Re: Samsung UA50KU6000 50" Smart TV

                  Anyone else able to assist a newbie?

                    Comment

                    • sintv
                      Member
                      • Feb 2015
                      • 37
                      • scotland
                      #6
                      Re: Samsung UA50KU6000 50" Smart TV

                      There a firms on Ebay who will repair the board for your fault. I think they replace one of the large ICs at 2 and 5 oclock of your arrow

                        Comment

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