Need help on a Asus x541uvk rev 2.0 board, please

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  • NPIRES
    Member
    • Oct 2012
    • 20
    • Portugal
    #1

    Need help on a Asus x541uvk rev 2.0 board, please

    Hi

    Newbie here. Reading as much as i can.

    I have this asus board with missing voltage on the gate's ac/in Mosfets, so it's "dead". From similar posts, gate's voltage should(?) come from BQ74780S, that i think is pu8091 on the boardview found in the forum.

    1 - 0v
    2 - 0v
    3 - 0v
    4 - 0v
    5 - 0v
    6 - 2.63v
    7 - 0v
    8 - 0v
    9 - 0v
    10 - 0v
    11 - 0v
    12 - 0v
    13 - 0v
    14 - 0v
    15 - 0v
    16 - 0v
    17 - 0v
    18 - 0.05v ????
    19 - 0.15v
    20 - 0.15v
    21 - 0v
    22 - 0v
    23 - 0v
    24 - 6v
    25 - 5.91v
    26 - 0.15v
    27 - 0.15v
    28 - 19.30v

    On a side note, board works and boots windows the Sorin way.

    TIA
    Last edited by NPIRES; 08-30-2022, 04:38 AM. Reason: wrong description on title
    Tags: None
    • piernov
      Super Moderator
      • Jan 2016
      • 4435
      • France
      #2
      Re: Need help on a Asus x541uvk rev 2.0 board, please

      https://www.badcaps.net/forum/showthread.php?t=90356
      OpenBoardView — https://github.com/OpenBoardView/OpenBoardView

        Comment

        • NPIRES
          Member
          • Oct 2012
          • 20
          • Portugal
          #3
          Re: Need help on a Asus x541uvk rev 2.0 board, please

          Thank you for the guide.

          So, if i'm getting the guide right, i have this :

          DCIN/VCC: pin 28 - 19v, ok
          ACIN/ACDET: pin 6 - 2.63v, ok
          REGN/VDD: pin 24 - 6v, ok
          CMSRC : pin 3 - 0v, (comes from source of first mosfet, that is not switching on, so OK ????)


          ACOK: pin 5 - 0v (not OK, right ?)
          ACDRV: pin 4 - 0v (not OK, should have 24v, right?)

            Comment

            • mon2
              Badcaps Legend
              • Dec 2019
              • 13936
              • Canada
              #4
              Re: Need help on a Asus x541uvk rev 2.0 board, please

              It is PU8901 ( I think you meant the same ).

              See attached.
              Attached Files

                Comment

                • farzad.balov
                  Member
                  • Dec 2020
                  • 12
                  • turky
                  #5
                  Re: Need help on a Asus x541uvk rev 2.0 board, please

                  Thanks.

                    Comment

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