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Huawei Mate 30 Phone Won’t Turn On Repair
Machine model: 4G Huawei Mate 30
Test results: mobile phone Won’t Turn On, the power-on current is fixed at 30ma.
Failure analysis:stop at Fixed current,Low current, usually caused by the power supply Current protection or the CPU not working properly. It’s enough to rule out the cause of the inability to work properly.
Open the Xinzhizao Soft software, find the physical label map of Huawei Mate30 4G, and find the power management chip.
Huawei Mate 30 mobile phone Won’t Turn On repair Figure 1.
Turn on schematic, search for U1000 to find the power management chip, first measure whether each VCC of the power chip is running normally.
Huawei Mate 30 mobile phone Won’t Turn On repair Figure 2.
Huawei Mate 30 mobile phone Won’t Turn On repair Figure 3.
After measurement, it is determined that the power chip is not working properly, and after Repeat welding is applied to the chip, the fault is repaired.
Huawei Mate 30 mobile phone Won’t Turn On repair Figure 4.
