Repair iPhone 6 200mA electric leakage

It is a serious phenomenon for current leakage. 

The next iPhone 6 we will repair is in a bad situation.

We should tear down the battery before we start to test it. Connecting it with multimeter, the current value shows 200mA,so we directly change an USB tube. Then we do it again ,but the same result.

So we wonder if there is another fault symptom happened, the last repair technician mentioned the iPhone 6 fingerprint is not good.

When heard of this problem, we can basically judge where the problem is. Connecting multimeter and trigger the on-off current with 300-400 mA, this is not normal. There must be something wrong with the fingerprint 3V. Use the multimeter to test fingerprint 3V against the ground value, it is short. This kind of situation is generally caused by one of outside capacitance is short, dismantling it! Finally, we find out the C2133 is short circuit, pry it off with phone IC repair knife, reboot the iPhone 6 and retest the standby value is normal, and the fingerprint is also normal now.

The iPhone 6 schematic diagramIC postion is shown in picture 11-8-1.

Summary of leakage detection process:

We must test the function of system as possible we can in advance if we encounter the leakage, which will be repaired if any of the functions are tested abnormal.

If all is normal, USB tube will be required to pay more attention. USB tube is also a problem, if it gets bad, the function will be normal and no problem can not be detected;

If there is a electric leakage on the iPhone, you can first press the iPhone power button and loose to see how much the current will be. In the normal case, it is about one hundred; 

If it jumps to three hundred or four hundred, there must be electric leakage, and jump to two hundred or three hundred leakage is basically caused by several 3V: The 3v power supply of USB tube, the 3V of fingerprint and the 3V of compass.