Detail solutions for iPhone 6P charge problem and error-1

Fault Description: iPhone 6P can't be charged and reports error-1 when reflashing

After we got the iPhone 6P , we knew that there happens something abnormal on phone charging. And we decide to re-flash it, but it reports error-1. So we have to disassemble the motherboard.

From our ever repair case,  it is a great possibility to be caused by baseband circuit or baseband chip, open the ZXW team and use the multi-meter, we tried to find the questioned parts.

First step we need to do is to remove the shield, we found that the motherboard is corrosion, which found in the  iPhone charging IC.

Picture 1

After cleaning the motherboard, replace the baseband power supply and charge IC.

Reflash the iPhone, it can not be charged after entering the system, after plugging in the data cable, it prompts does not support this accessories.

According to past repair experience, this fault is caused by the lack of power supply condition of USB chip.

While testing USB operating conditions we found that PP_TRISTAR_PIN power supply has no voltage on the Fluke digital multimeter, this power supply is converted from Q1701, after removing the Q1701 we found that the pad was seriously corroded, so we directly use jumper wire to short connect Q1701 2 pin and 3 pin.

Picture 2

Enter the system to test, charge function is normal now. Other functions are also normal, repair is over here.