Rep: 1
2
Hello everyone.
I have am iphone X qualcomm that would not power.
When i hook up only the top layer of the pcb to dcps, the top layer draws current before prompt to boot. But i tested with a DMM and found no shorts on PP_VDD_MAIN and PP_VDD_BOOST.
now i wonder what other lines could draw current before prompt to boot.
Any help is appreciated.
THANKS.
Esta é uma boa pergunta?
Rep: 221,4 mil
15
289
807
How much current? It’s not like there is some main switch on the logic board that cuts all the current to the components.
Take a look at the schematic and the moment a battery or a USB power source is connected, quite a few components receive VDD_MAIN. There is a line called PP1V8_ALWAYS and as the name suggests…it is always on.
So if the board is still dead, focus on all of the subsystems powered by the PMIC to see if there are any shorts or related issues. They may be the cause of your problem.
Esta resposta foi útil?
Rep: 949
12
14
1
Use this as a reference https://www.youtube.com/watch?v=nuZz_D1u...
Esta resposta foi útil?
Últimas 24 horas: 1
Últimos 7 dias: 6
Últimos 30 dias: 12
Duração total: 304
1 comentário
Are you sure your power squid is good?
por Chris Stables