MacBook Air M2 820-02536 trackpad not working

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  • daltonjr.
    Member
    • Jul 2016
    • 48
    • Austria
    #1

    MacBook Air M2 820-02536 trackpad not working

    Hi,

    I have this MacBook that I can not restore, because trackpad is not working. I have tried other topcases, trackpads, cables.... no su​ccess. I have replaced UT360 twice and UT320, no lu​ck.

    Main power lines are present, but at:

    SPI_IPD_MOSI_CONN = 0V
    SPI_IPD_MCU_CS_CONN_L = 3.28V​
    SPI_IPD_MISO_CONN = 0V
    IPD_SYS_AWAKE_CONN = 0V

    Maybe someone has better u​nderstanding of these circu​its and can help. Thank you​.
    ​
    Tags: None
    • mon2
      Badcaps Legend
      • Dec 2019
      • 14607
      • Canada
      #2
      SPI_IPD_MOSI_CONN = 0V
      SPI_IPD_MCU_CS_CONN_L = 3.28V
      SPI_IPD_MISO_CONN = 0V
      IPD_SYS_AWAKE_CONN = 0V
      SPI_IPD_MOSI_CONN - master out; slave in - no traffic from the bus master (logic board)
      SPI_IPD_MCU_CS_CONN_L - active LOW signal (denoted by the _L suffix) - since this is a logic '1' - the trackpad is not being selected
      ​

        Comment

        • daltonjr.
          Member
          • Jul 2016
          • 48
          • Austria
          #3
          Meaning? 🤔

          SPI_IPD_MOSI at UT360 is 0V, that comes from CPU. ​

            Comment

            • mon2
              Badcaps Legend
              • Dec 2019
              • 14607
              • Canada
              #4
              Confirm the power rails on this level shifter @ UT360.

              Any activity on the other signals on UT360 from the bus master?

              Does this unit power up otherwise?

                Comment

                • daltonjr.
                  Member
                  • Jul 2016
                  • 48
                  • Austria
                  #5
                  Yes, it does power up. No water damage.Keyboard works. Here are all values at UT360​.
                  • SPI_IPD_MCU_CS_L = 1,25V
                  • SPI_IPD_CLK = 0V
                  • SPI_IPD_MOSI = 0V
                  • SPI_IPD_MISO_R = 0V
                  • PP1V2S2 = 1,25V
                  • SPI_IPD_MISO_CONN = 0V
                  • SPI_IPD_MOSI_CONN_R = 0V
                  • SPI_IPD_CLK_CONN_R = 0V
                  • SPI_IPD_MCU_CS_CONN_L = 3.28V
                  • PP3V3_S2SW_IPD = 3,28V
                  ​

                    Comment

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