Problem with pfc in lg 42lm620S

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  • raydem
    Member
    • Dec 2012
    • 27
    • spain
    #1

    Problem with pfc in lg 42lm620S

    Hello,
    I have a problem with the power supply of LG 42LM620S, the power board is EAX64427101. The problem is the pfc circuit, when I connect it the board has a short circuit, but If I remove L601 the board works fine without leds light. Also, if i disconnect the F101 the board is in short circuit but the pfc circuit works fine, 380V. i changed the fan7930, the mosfets q101, q102, q602 and q601. Also i changed IC101 ( L6599). To eliminate circuits I removed d254, d260, d253,d261, d251 and q251.

    I have not idea what more check..
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    • dskall
      Badcaps Legend
      • Oct 2016
      • 2905
      • usa
      #2
      Re: Problem with pfc in lg 42lm620S

      Did you check Q603 and Q604 and all the gate resistors and diodes?
      I assume no responsibility for any stupid suggestions I might post.

        Comment

        • raydem
          Member
          • Dec 2012
          • 27
          • spain
          #3
          Re: Problem with pfc in lg 42lm620S

          Originally posted by dskall
          Did you check Q603 and Q604 and all the gate resistors and diodes?
          Yes, all it is ok.

            Comment

            • raydem
              Member
              • Dec 2012
              • 27
              • spain
              #4
              Re: Problem with pfc in lg 42lm620S

              Any idea??

                Comment

                • kasfamily
                  Badcaps Veteran
                  • Aug 2014
                  • 765
                  • Russia
                  #5
                  Re: Problem with pfc in lg 42lm620S

                  D603-?

                    Comment

                    • raydem
                      Member
                      • Dec 2012
                      • 27
                      • spain
                      #6
                      Re: Problem with pfc in lg 42lm620S

                      D603 is ok.

                        Comment

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