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Huawei P30 Pro Won’t Turn On repair
Model: Huawei P30 Pro
Customer description: mobile phone Won’t Turn On
Test results: mobile phone Won’t Turn On, power-on motherboard level 2 Short circuit.
Fault analysis:Short circuit is generally searched through The rosin smoke method.
Huawei P30 Pro Won’t Turn On repair Figure 1.
Open the Xinzhizao Soft software, find the physical labeling drawing of Huawei P30 Pro, find the power chip according to the location labeling, and measure the input and output VCC with the circuit schematic.
Huawei P30 Pro Won’t Turn On repair Figure 2.
Huawei P30 Pro Won’t Turn On repair Figure 3.
After measurement, the power chip outputs buck circuit 1.12v VCC Short circuit.The rosin smoke method method is used to find Short circuit components, and it is found that the CPU melts, that is,Short circuit is located inside the CPU. The mobile phone has never been repaired, and this kind of performance is caused by the aging of CPU, which can’t be repaired.
Huawei P30 Pro Won’t Turn On repair Figure 4.
