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What produces PP1V8_GRAPE on iPhone 6

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  • What produces PP1V8_GRAPE on iPhone 6

    Does PMIC create PP1V8_GRAPE or does it come from Cumulus? I am missing this voltage and confused about where the disconnect is. I have tried to do the injection of 1V8 power from my DC power supply to produce it for this line to get the touch back, however, it didn't work.

  • #2
    It is produced by PMIC and it's one of the dudes that goes to the inverter/buffer that is the same guy that hifa_bsync line comes out of. Check out this video from Mark where he once had no touch from a bad U2403 inverter/buffer that pulled down 1v8_GRAPE.
    https://youtu.be/sGUjVLsIAgg?t=28m56s

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