Дата выхода 19 сентября 2014 года. Это маленькая версия iPhone 6 Plus с 4.7-дюймовым экраном.

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No boot, no itune

hi,

I have an iPhone 6 from my daughter no boot.

It stop power on after charging with third party charger, cable was burn....

Since i replace U1700,:

- it was stucked on apple logo if i hold power button during 2sec.

- it's not recognize by itune

- plug and unplug to an official charger is detect by the phone.

i try with new dock flex, same result.

There is no short on vcc_batt and vcc_main

i test this voltage:

PP_CPU 0.85V

PP_VAR_SOC 0.9V

PP_GPU 0V ????

PP1V8_SDRAM 1.8V

PP1V2_SDRAM 1.2V

PP0V95_FIXED_SOC 0.95V

PP1V8 1.8V

PP1V2 1.2V

PP1V2_OSCAR 1.2V

PP1V8_OSCAR 1.8V

PP1V8_GRAPE 1.8V

RESET_1.8_L 1.77v---- 0.7v before u1700 replace

is it normal that pp_gpu has no voltage before boot(some people say that)?

i test the line but no short (63 Ohms)

do you thinks u1700 is not replace correctly ( it's my 1st microsoldering)

Do you think i need to replace PMIC?

since there is no short on pp_gpu do i need to take off L1213-L1214 to continu testing ?

I dont know what to do first...

If it's normal that pp_gpu has no voltage before boot i need to verify u1700, if not i need to replace PMIC , is it right ?

thanks

ps: never third party charger again :-)

Отвечено! View the answer У меня та же проблема

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1 Ответ

Выбранное решение

PP_GPU only comes on when the display turns on. So if you want to test it, you either need to connect a power button flex and manually push the button or have a dock flex installed and plug in a charger. If you go the power button route, PP_GPU will only stay on for about 20-30 seconds. With 63 Ohms of resistance, it is not shorted.

There are also other power lines generated by the PMIC (PP3V0_NAND, PP3V0_TRISTAR etc.); have you tested those as well?

I suspect your Tristar replacement did not work.

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thanks

i will test PP_GPU (just after pushed the power button) when i come back home.

I will test other voltage too

I have another Tristar, if all voltage is ok i will replace it.

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Bouveret будет вечно благодарен.
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