Iphone 5s no power Hello,
I have an Iphone 5s board which was shorted. The shorted component on VCC_main is removed.
STAGE 1: After promt to boot the result was stable 0.05 A on DCPS and not recognized by the PC.
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")
STAGE 2: PP1v8 RESET L was not present but not shorted also.
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. |