How to slove iphone 5s Leakage circuit Board Heating

It is a very muggy day, Vipprogrammer has been working hard, hoping to help more iphone users solve all kinds of incurable diseases。

A customer sent an iPhone 5S leaks electricity and the PCB is obviously hot.

Step:

Plug the adjustable power supply and the standby current is about 50mA. After 1 min, we can feel that the baseband circuits and the front and rear sides are hot. Unplug and plug the adjustable power supply for several times, we can feel that USB Control chip U2 gets hot faster than other parts. According to the repair experience, we remove USB management chip U2. The motherboard without U2 is shown in picture 5-39.

Picture 5-39

USB management chip U2 in bitmap is shown in picture 5-40.

Picture 5-40

Replace U2 with a new USB management chip and assemble the iPhone. After testing, the electricity leakage disappears. Trouble is removed.

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