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820-3115 must short power pads

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  • #31
    Smc_pbus_vsense: 2.104v

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    • #32
      Post all voltages for Q5480.

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      • #33
        At Q5480 it looks like that all the voltages are OK, as well as both voltage dividers

        1: GND
        2: 3.307V
        3: 12.58V
        4: 12.58V
        5: 6.270V
        6: GND

        if you do the calculation of the output voltage divider it should give 2.099V and I'm mesuring 2.104V

        My guess is that the trace may be broken between R5788/89 and SMC, or ball not melted/ not soldered properly and in wrost case that pad is missing under SMC

        What do you think?

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        • #34
          Try 85W charger and run again ASD.
          The signal should increase a bit.
          If OK, then adjust resistor divider to disable the error with 60W charger.

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          • #35
            I've scratched the Vsense Pad shown with the arrow, and check for continuity to the R5488/89: NOK
            So I decided to put some solder there for attaching a wire, after putting solder, I mesured the continuity again and was OK, but still shuting itself down.
            Reflowed SMC, then I've lost PPBUS: 12.29V: SMC not talking to ISL + No green Light
            Reflowed again: PPBUS 12.60V OK, Green Light OK
            Attached wire because after reflow, no continuity

            Now quarter fan spin once, like back to the beginning, but mesuring 2.105V at the pointing arrow

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            • #36
              Reball SMC now...

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              • #37
                SMC_PBus_VSense.jpg

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