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Problem with pfc in lg 42lm620S

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    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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    #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.

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      #3
      Re: Problem with pfc in lg 42lm620S

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

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        #4
        Re: Problem with pfc in lg 42lm620S

        Any idea??

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          #5
          Re: Problem with pfc in lg 42lm620S

          D603-?

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            #6
            Re: Problem with pfc in lg 42lm620S

            D603 is ok.

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