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supply imac a1418 and component not to be found

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    supply imac a1418 and component not to be found

    Hello everyone,
    I can't find this component in the figure ... it's the power supply circuit of an imac a1418 (ADP-185BF T).
    Do you know where to buy it?
    Attached Files

    #2
    Re: supply imac a1418 and component not to be found

    Looks like the PFC inductor. Hard to find separately, you can use one from a donor PSU. Why would you want to replace it though?
    OpenBoardView — https://github.com/OpenBoardView/OpenBoardView

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      #3
      Re: supply imac a1418 and component not to be found

      it is short-circuited

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        #4
        Re: supply imac a1418 and component not to be found

        have a schematics for ADP-185BF T??

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          #5
          Re: supply imac a1418 and component not to be found

          Originally posted by phonetika View Post
          it is short-circuited
          Are you sure about that? It needs to have a very low resistance because it is in series with mains input.
          Measure exact resistance of the windings. I highly doubt that this is the issue.

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            #6
            Re: supply imac a1418 and component not to be found

            Hi,
            I was just wondering what kind of failure lead to your conclusion the inductor was the culprit?

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              #7
              Re: supply imac a1418 and component not to be found

              That is very likely the pfc inductor and it will check as a short or less than an ohm. Here is a thread about the same power supply https://www.badcaps.net/forum/showthread.php?t=69871

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                #8
                Re: supply imac a1418 and component not to be found

                Most probably, there are some components (power PFC mosfet and smd diode) short-circuited.

                I think the the smd diode S8GC - S8MC fails by itself, and causes PFC power mosfet to fail also, due to over-load.
                Attached Files

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