Ipad Air wont charging and turn on
Charger connected when not show any screen, not reponse
I checked rails
PP3V0_S2R_TRISTAR : 0v
PP1V8_S2R_TRISTAR : 0v
PPVBUS_PROT : 4.4v
Ppvbus e75 usb conn : 4.4v
Help me please
Sorry I cannot speak english well
Update (03/07/2017)
I checked VCC MAIN
VCC MAIN : ALL 5.2V, NOT SHORT
and PP3V0_S2R_TRISTAR , PP1V8_S2R_TRISTAR line
checked
but all capacitor not short, volatage is 0
upload several pictures,
check please
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WLED LX A,B : 5.2V (datasheet :20v)
PPLED OUT A,B : 5.2V (datasheet :20v)
PPLED OUT BACK REG : 5.2V(datasheet :20v)
Measured value is lower than the value of the Regulation
U8100 problem?
由 Chulsunpark 完成的
Replace the tristar. It is very chipped and probable damaged.
由 Gigabit87898 完成的
Check if the WLED and PPLED lines are shorted to vcc_main.
由 Gigabit87898 完成的