iMac 20" PSU 661-3350 - WT7515 Supervisor chip problem

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  • Fedguy
    New Member
    • Sep 2011
    • 7

    #1

    iMac 20" PSU 661-3350 - WT7515 Supervisor chip problem

    Does anyone know whereto buy the dreaded WT7515 chip?

    thx
  • Fedguy
    New Member
    • Sep 2011
    • 7

    #2
    Re: WT7515 chip buy?

    AC/Bel 661-3350
    iMac G5 20"
    First left green LED comes on Logic board but when you push the power button nothing happens. I have 20v and 5v on the connector.

    We traced the voltages on the WT7515 which has the 5v sense in but no 5V out

    Comment

    • Toasty
      Badcaps Legend
      • Jul 2007
      • 4171

      #3
      Re: WT7515 chip buy?

      What is the API number on the board? e.g., API 3PC96

      Do you have the datasheet for the chip?

      The chip is a OC/OV/UV supervisor.

      What repairs, if any, have you done to the supply?

      Check Q1 (1P) transistor on the HOT side near the TOPSwitch device. Look for a discolored band running down the middle of the chip.

      Toast
      veritas odium parit

      Comment

      • Fedguy
        New Member
        • Sep 2011
        • 7

        #4
        Re: iMac 20" PSU 661-3350 - WT7515 Supervisor chip problem

        Has anyone found a supplier yet for the WT7515?

        Comment

        • Toasty
          Badcaps Legend
          • Jul 2007
          • 4171

          #5
          Re: iMac 20" PSU 661-3350 - WT7515 Supervisor chip problem

          Not yet.

          This is why I asked the questions above. You may not have a problem with the chip.

          Toast
          veritas odium parit

          Comment

          • Toasty
            Badcaps Legend
            • Jul 2007
            • 4171

            #6
            Re: iMac 20" PSU 661-3350 - WT7515 Supervisor chip problem

            eBay
            veritas odium parit

            Comment

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