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IPhone XR phone is not charged for repair
Measuring that the pp_vbus1_e75 of U3300 has 5V when the motherboard is disassembled, and the battery holder has no voltage, so it is preliminarily judged that the charging IC U3300 is broken. Cooling installation test, charging is normal, troubleshooting, and maintenance is over.
Machine model: iPhoneXR
Malfunction: the phone does not charge.
Maintenance process:
An iPhoneXR fault machine, the original fault is that the boot screen flashes and jumps, and it will not be turned on after being left unused for one month.
Xr mobile phone does not charge maintenance Figure 1
Disassemble the machine, brush the motherboard seat with washing water, and it can be turned on. The screen doesn’t flash, but it doesn’t charge. The fault of over-tail plug-in cable is still the same.
Xr mobile phone does not charge maintenance Figure 2
Measuring that the pp_vbus1_e75 of U3300 has 5V when the motherboard is disassembled, and the battery holder has no voltage, so it is preliminarily judged that the charging IC U3300 is broken.
Xr mobile phone does not charge maintenance Figure 3
Xr mobile phone does not charge maintenance Figure 4
The straight air gun quickly removes the chip and replaces it with a new charging chip.
Xr mobile phone does not charge maintenance Figure 5
Cooling installation test, charging is normal, troubleshooting, and maintenance is over.
Xr mobile phone does not charge maintenance Figure 6
