Macbook A1708 - 5V/0A -no power- liquid damage.

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  • martyjelen
    Senior Member
    • Mar 2023
    • 127
    • Czech republic
    #1

    Macbook A1708 - 5V/0A -no power- liquid damage.

    Hello, I have macbook a1708 with some liquid damage on PCB.

    I alredy tried to clean PCB with IPA. Stuck at 5V/0A

    PPBUS_G3H is missing > 0V

    I removed fuse F7000 to check voltage, but it's still the same > 0V.

    Diode reading on pad 1 is 576
    Diode reading on pad 1 is 460

    What should I check now? Thanks

    Martin
    Tags: None
    • mon2
      Badcaps Legend
      • Dec 2019
      • 13898
      • Canada
      #2
      Re: Macbook A1708 - 5V/0A -no power- liquid damage.

      Review the 2nd case here:

      https://repair.wiki/w/A1708_2016,_20...ar_MacBook_Pro

        Comment

        • martyjelen
          Senior Member
          • Mar 2023
          • 127
          • Czech republic
          #3
          Re: Macbook A1708 - 5V/0A -no power- liquid damage.

          Thanks for reply. There is no short on PP3V3_G3H.

            Comment

            • mon2
              Badcaps Legend
              • Dec 2019
              • 13898
              • Canada
              #4
              Re: Macbook A1708 - 5V/0A -no power- liquid damage.

              Review each LDO rail on each cd3215. @Piernov and gang wrote an article on how to achieve the 20v negotiations. There is a flow chart on logiwiki.

                Comment

                • martyjelen
                  Senior Member
                  • Mar 2023
                  • 127
                  • Czech republic
                  #5
                  Re: Macbook A1708 - 5V/0A -no power- liquid damage.

                  Originally posted by mon2
                  review each ldo rail on each cd3215. @piernov and gang wrote an article on how to achieve the 20v negotiations. There is a flow chart on logiwiki.
                  u3100

                  pp20v_usbc_xa_vbus - 5v
                  pp3v3_upc_xa_ldo - 3,3v
                  pp1v8_upc_xa_ldoa - 1,8v
                  pp1v8_upc_xa_ldod - 1,8v
                  pp1v1_upc_xa_ldo_bmc - 1,1v

                  u3200

                  pp20v_usbc_xb_vbus - 5v
                  pp3v3_upc_xb_ldo - 3,3v
                  pp1v8_upc_xb_ldoa - 1,8v
                  pp1v8_upc_xb_ldod - 1,8v
                  pp1v1_upc_xb_ldo_bm - 1,1v

                    Comment

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