Like the topic related, usually we will open the Open WUXINJI software to check iPhone schematic diagram, find the normal current value , because it is a great possibility that there exist a short circuit which caused the abnormal fault.
First step we do is to dissemble iPhone 6 by phone opening tools, connect iPhone motherboard to DC power supply, and then press iPhone power button, the current stuck on 750MA.
Measure the each circuit output for iPhone power IC with UNI-T UT81C Scope Digital Multimeters, we don't see any short circuits.
Actually, for this problem, the best way is rosin method.
Apply some rosin on iPhone motherboard, and then use PPD 861D Plus hot air rework station to smoke the iPhone motherboard until it turns white. Supply power and boot it, after a while, do the same thing for several times. Then you will find the short circuit component is hot and discolored.
Remove capacitor C0616 with Precision Titanium Alloy Tweezers, supply power and boot it, now the current shows normal, and everything goes well.
Some capacitors are not in power, its resistance is normal, but in the case of power-adding, it's going to leak.
The problem still exist, but we need to check the capacitor to confirm the sources fault, we will continue the problem next time.
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