iPhone 5s shorted motherboard
Hello,
I have an Iphone 5s board which is shorted. Connecting to power supply and appling 2A nothing getting hot to determine where the short is coming.
How’s that possible 2 Amps and nothing getting hot ?
Thanks.
좋은 질문 입니까?
댓글 2개
Thanks Minho. But i think i did not express myself correctly before.
I managed to remove the short from the VCC_MAIN. And i did put back these 3 ICs what i removed before. Display IC, U2 and PMIC.
And now the readings show to me i have not done the job correctly about the PMIC i guess.
Power rails what i have measured:
PP_VCC_MAIN - 3,8 V
PP_BAT_VCC - 3,8 V
PP1v2_SDRAM - 0,01 V (Diode mode shows "353" = no short)
PP1V0_SOC - 1,0 V
PP_CPU - 1,0 V
PP_GPU - 0V (Diode mode shows "309")
PP_1v8 Always - 1,8V
PP1v2 - 0,01 V (Diode mode "383")
PP1v8_SDRAM - 0,07 V (Diode mode "624")
PP3v0_SDRAM - 0,20 V (Diode mode "629")
PP3v3_USB - 0V (Diode mode "520")
Kaspar 의
Update.
I did removed the display IC for the reset line - Phone started to boot nicely was like 0,1 - 0,5 Amps and then suddenly 0. And now it wont boot at all.
Suddenly the PP1v8 line is not present - Diode mode shows "1700" something.
These diode result's looks a bit not normal - right ? Should be like 300-400 ?
And also after the promt to boot all the power rail's are missing (but in diode mode does not show the short circuit - showing like "1230" and moving up.
Kaspar 의