Vivobook Flip 14 TM420 Mosfet replacement

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  • gusme
    New Member
    • Mar 2021
    • 6
    • Italy

    #1

    Vivobook Flip 14 TM420 Mosfet replacement

    I need to replace a component which I believe it's a 2n7002 SOT-23 SMD MosFET. I don't have the schematics for this, I tried to ask for them in this forum with no luck.
    It's an Asus Vivobook Flip 14 TM420

    I looked at the components near the area around the IT8987E chip in schematics of similar notebooks and the only sot23 component I could find was the 2n7002

    Do you think it's safe to try to replace with the above?
    Attached Files
  • Techtiger
    Badcaps Legend
    • Oct 2014
    • 1601
    • france

    #2
    Re: Mosfet replacement

    it's a N-Channel fet the top leg is Drain down legs Gate Source , why do you want to replace ? what are the voltages on the pin ?

    Comment

    • gusme
      New Member
      • Mar 2021
      • 6
      • Italy

      #3
      Re: Mosfet replacement

      I touched it accidentally with a metal cover and it went up in smoke.
      After that the pcie nvme disk is not detected anymore
      I cannot read the voltages right now as I'm wating for some tools to desolder it

      Comment

      • mon2
        Badcaps Legend
        • Dec 2019
        • 14027
        • Canada

        #4
        Re: Mosfet replacement

        See attached on a typical schematic with this part.

        Perhaps is the BAV99 which is SOT-23 package (like yours). Please review.
        Attached Files

        Comment

        • gusme
          New Member
          • Mar 2021
          • 6
          • Italy

          #5
          Re: Mosfet replacement

          Originally posted by techtiger
          it's a N-Channel fet the top leg is Drain down legs Gate Source , why do you want to replace ? what are the voltages on the pin ?
          I managed to desolder it and check tensions between pins

          Here's a photo: 3.27 between the bottom ones, 1.27 between top and bottom left, 1.80 or less between bottom right and top
          Attached Files

          Comment

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