PP5V0_Usb line dead ( Tristar and Tigris replaced)
Hello all, I received an iPhone 7 and also 6s plus with the same issue. PP5v0_ usb line is completely dead (not grounded). The caps on that line when I used a multimeter to check them do not give any continuity or sign of being shorted.
I have changed the Tristar and Tigris still same issue
I’ll appreciate all help and advise please.
do you have a dc power supply
daniel さんによる
@daniel yes I have.. 0.2amps prompt to boot. But I discovered changing the Tigris is useless..cos the PP5v0 usb line on the pad of the Tigris are all dead.
n3d Tech さんによる
@n3dtech are you getting a good diode reading
daniel さんによる
@daniel the diode reading on caps along the PP5v0 usb line is null ( like no response). You remove the caps and check the pads if you’ll get any reading same thing (null). I also remove the Tigris I.C and read all the pads linked to PP5V0 line and null.. no short to ground just dead.
n3d Tech さんによる
@n3dtech possibility of the replaced chips could be bad, failing that i would check q2101. i dont have the boardviews infront of me atm so cant really look, if replacing q2101 doesnt work i would pull tristar and tigris to see if you get a diode reading usually 0.2amps would lead to tristar
daniel さんによる
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