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Xiaomi 10 Pro mobile phone does not charge maintenance
It is found that the motherboard is burnt, and the resistance of USB 5V terminal is measured as 0. Cure the bone, scrape off the burned slab, and the resistance value comes back. Short circuit B3/A2 pin of Q5400, charging is normal, and the fault is repaired.
Machine model: Xiaomi 10Pro
Malfunction: the phone does not charge.
Maintenance process:
I received a Xiaomi 10 Pro, and the fault described a burnt smell during charging, and then the phone stopped charging.
Xiaomi 10 Pro mobile phone does not charge maintenance Figure 1
After disassembling the machine, it was found that the motherboard had burnt marks, and the resistance value of USB 5V terminal was measured as 0.
Open Xinzhizao, find the schematic diagram and check that the burnt chip is a 5V conversion chip, which can be shorted.
Xiaomi 10 Pro mobile phone does not charge maintenance Figure 2
Xiaomi 10 Pro mobile phone does not charge maintenance Figure 3
After removing the chip, the board showed signs of burning, and the resistance value was still 0. After scraping the bone and healing, the burned board was scraped off, and the resistance value came back.
Xiaomi 10 Pro mobile phone does not charge maintenance Figure 4
Short circuit B3/A2 pin of Q5400, charging is normal, and the fault is repaired.
