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5G Huawei nova6 Won’t Turn On repair
Machine model: 5G Huawei nova6
Fault symptom: mobile phone Won’t Turn On
Maintenance process:
Received a 5G Huawei nova6, fault description: The mobile phone can’t be turned on. After getting the mobile phone, connect DC power supply, power-on test, and power up switch Low current.
Low current is generally the motherboard Current protection caused by the main VCC or the second Short circuit, which can be solved only by troubleshooting the Short circuit fault point.
Open Xinzhizao Soft, and check the 5G version of Huawei nova6 Boardview.
5G Huawei nova6 Won’t Turn On repair Figure 1.
Through schematic combined with Boardview, find the input and output components of the power chip on the motherboard, and measure whether the line is Short circuit. Measure the 1.2V VCC Short circuit output by the power management chip to the CPU.
5G Huawei nova6 Won’t Turn On repair Figure 2.
Main board The rosin smoke method, add 1.2V VCC to this line, and no obvious fault point is found.
5G Huawei nova6 Won’t Turn On repair Figure 3.
Turn VCC up to 1.8V I found that Capacitor Colophony (Solder)melted next to CPU.
5G Huawei nova6 Won’t Turn On repair Figure 4.
After taking Capacitor off,Short circuit disappeared and the fault was repaired.
5G Huawei nova6 Won’t Turn On repair Figure 5.
5G Huawei nova6 Won’t Turn On repair Figure 6.
