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HUAWEI P30 cannot be charged. How to repair it
Machine model: HUAWEI P30
Fault phenomenon: the mobile phone cannot be charged.
Repair process: start the machine for test, plug in the charger, and find that there is a lightning sign on the screen, but there is no charging current, so the mobile phone cannot be charged.
HUAWEI P30 cannot be charged Figure 1.
Remove the machine, remove the main board, and measure the ground value of the large Inductor beside the charging IC.When checking schematic and Boardview and measuring VCC related to charging chip, it is found that the avdd VCC of G8 pin is 3.9v, which is a little higher than the normal 3.3V.
HUAWEI P30 cannot be charged Figure 2.
HUAWEI P30 cannot be charged Figure 3.
When measuring the ground value of Capacitor c1631 Capacitor, it is found that the normal condition at one end of Capacitor should be GND, but the actual measured value is OverLoad.
HUAWEI P30 cannot be charged Figure 4.
After removal, it was found that Capacitor pad break off,Jump wire,GND were directly installed. After installing Capacitor,VCC was measured again and returned to normal 3.3V, and the fault was repaired.
HUAWEI P30 cannot be charged Figure 5.
HUAWEI P30 cannot be charged Figure 6.
