But if it happens some fault, what should you do? especially when you have used it so many years...
Honestly, i don't want give up, so i am glad to repair it and make him alive again
The charging part of iPhone 5 is made up of Q2, U2 and U7. As shown in picture 1, the circuit diagram of the charging port J7 can be inquired on the WUXINJI dongle.
The 5V voltage sent from the tail plug passes through the Q2 to send two 5V power supply. PP5V0_USB_PROTECT and PP5V0_USB_RPROT were sent to U7 and U2 respectively.
In addition, there are two detection pin in the middle of the battery contact J6! they pass through FL10, FL11 respectively and send to power IC-U7, FL10, FL11, in actual cell phone repair, it is found that the 2 pins are very easy to fall off, causing the cell phone can not be charged! and keep reboot again and again!
to measure whether C304 has 5V output, and measure whether C272 has 5V output.
If both of them can be measured 5V, then the problem is in U2 or U7.
In addition, the battery detection pin problem will cause abnormal charging, the more charging, the less battery power will be, and also there will be automatic restart fault.
So maybe there exist a deeper question, we need to disassemble it and use the more professional battery diagnostic tool, later we will update.
informative post, We know your cell phone is important. We keep you updated throughout your repair with automated messages available via email, text, or calls. Stay up-to-date with your phone repair every step of the way. If the part should stop functioning, we repair it again at no cost to you (excluding user abuse and damage). smartphone repair service
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