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O iPhone 5s da Apple foi anunciado em 10 de setembro de 2013. O reparo deste dispositivo é semelhante ao de modelos anteriores e requer chaves e ferramentas de abertura. Disponível como GSM ou CDMA / 16, 32 ou 64 GB / nas cores prata, dourado e cinza espacial.

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Diagnosing iPhone 5s no power Diode Readings

I’m working on an iPhone 5s that randomly stopped powering on or charging. Ive done some resistance testing to look for shorts, but i dont have known good readings to compare.

Diode mode readings:

Vcc main 0.359

Pp5v0_usb 0.000/OL

Pp batt vcc conn 0.401

Pp1v8 0.410

Pp1v2sdram 0.271

Pp5v0 usb prot 0.556

Mic1 to codec p OL

Any ideas to lead me towards a solution? Does the pp5v0usb OL look important, i only see 3 caps next to the connector highlighted on that line in zxw?

Pp5v0 usb conn is ol, but im not sure this is significant. Pp5v0 usb prot was .556. Does anything beginning with pp5v0 lie on the same line? And what is pp5v0 as it relates to the operation of the phone?

The charging MOSFET Q4 had a few solder balls at the base of the underfill.

How would you proceed with testing voltages, especially around the charging circuit and maybe tristar to determine the issue?

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Resposta Mais Útil

If you are just starting to diagnose phones, grab the schematics for the iPhone 5s look at the power management chip and trace where your pp5V lines go. I would suspect it is normal for Pp5v0 usb conn to be OL.

 I would start checking the readings at your charging dock FPC you really need another phone to compare but you could write down the measurements and check them on the ZXW iPhone 6 board view I think they show the resistance and they would be similar.

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