supply imac a1418 and component not to be found

Collapse
X
 
  • Time
  • Show
Clear All
new posts
  • phonetika
    New Member
    • Nov 2019
    • 5
    • Italia

    #1

    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
  • piernov
    Super Moderator
    • Jan 2016
    • 4435
    • France

    #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

    Comment

    • phonetika
      New Member
      • Nov 2019
      • 5
      • Italia

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

      it is short-circuited

      Comment

      • phonetika
        New Member
        • Nov 2019
        • 5
        • Italia

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

        have a schematics for ADP-185BF T??

        Comment

        • KvnTM
          Badcaps Veteran
          • May 2018
          • 434
          • Germany

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

          Originally posted by phonetika
          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.

          Comment

          • keks19
            New Member
            • Nov 2017
            • 3
            • Europe

            #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?

            Comment

            • R_J
              Badcaps Legend
              • Jun 2012
              • 9535
              • Canada

              #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

              Comment

              • Francisco.s
                Badcaps Veteran
                • Jan 2013
                • 686
                • Spain

                #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

                Comment

                Related Topics

                Collapse

                Working...