w540eu no power(3v 5v missing)

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  • ashan000
    Member
    • Jul 2022
    • 34
    • Sri lanka
    #1

    w540eu no power(3v 5v missing)

    I have no power board(w540eu). no 3v 5v presents.. checked ic pins. EN pin only show about 1v.. according to schematic, I guess EN not generate by io chip. I attach pdf files and voltages presents.

    see the image plz.
    no voltages on the gate 1 of the mosfet(DD_ON signal) is that the problem.??
    Attached Files
    Tags: None
    • mcplslg123
      Badcaps Legend
      • Jun 2015
      • 7262
      • india
      #2
      Re: w540eu no power(3v 5v missing)

      Does SIO releases DD_ON??

        Comment

        • ashan000
          Member
          • Jul 2022
          • 34
          • Sri lanka
          #3
          Re: w540eu no power(3v 5v missing)

          Originally posted by mcplslg123
          Does SIO releases DD_ON??
          No it does not.. does SIO need VDD 3 to work..??

            Comment

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