5V-0.16A - a2780 -820-02652 - macbook pro m2

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  • defdjamel
    Member
    • Jul 2025
    • 20
    • france
    #1

    5V-0.16A - a2780 -820-02652 - macbook pro m2

    Hi ,
    on a2780 -820-02652 - macbook pro m2
    laptops stuck 5V-0.16A
    my measurement :
    PPBUS_AON 12V
    PP3V8_AON 3.8v
    PP3V8_AON_MPMU 3.8
    PP1V8_AON 1.8
    PP1V2_AON 1.3
    PP3V3_AON 1.5 not stable
    PP3V2_S2 1.5 not stable

    PP3V3_AON resistance to Gnd 60ohms
    I injected 3.3 on PP3V3_AON and consumption was 120mA


    PMU (U8100) deliver PP3V3_AON ?
    If you have an idea..
    Tags: None
    • mon2
      Badcaps Legend
      • Dec 2019
      • 14631
      • Canada
      #2
      PP3V3_AON 1.5 not stable
      PP3V2_S2 1.5 not stable
      PP3V3_S2 - this rail is used by the CD3217 ACE2 controllers. Measure the resistance to ground of this rail.

      Confirm the operation of each of the CD3217 controller. Test their LDO rails are present on each device.

      https://repair.wiki/w/CD3217_compatibility

      https://logi.wiki/index.php/CD3217_and_T2_Power_on_Sequence​

        Comment

        • defdjamel
          Member
          • Jul 2025
          • 20
          • france
          #3
          Thanks for your reply,
          On each CD3217:
          • LDO 3V3 and LDO 1.5 are OK and stable when I plug the USB on the corresponding CD3217.
          • diode mode on each LDO -> 0.5 all
          • PP3V2_S2 resistance is difficult to measure, it fluctuates between 1 kΩ and 100 kΩ…

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