Xiaomi 8 can't adjust the volume

Xiaomi 8 can’t adjust the volume

Xiaomi 8 can't adjust the volume. Pressing the volume up button doesn't respond.After measurement, the mainboard was disconnected, the power supply was removed, and pin and Jump wire were sent to Capacitor R601 in the lower left corner, and the fault was repaired.

Xiaomi 8 cannot adjust volume

Machine model:Xiaomi 8

Fault phenomenon:Xiaomi 8 cannot adjust the volume.

Repair process: after getting the mobile phone, start the test, press and hold the volume up button, there is no response, the sound size does not change.Press and hold down the phone volume key to turn down the sound.Take out the main board after dismantling the machine. The measured value to the ground is ol, indicating that the main board is disconnected.

Xiaomi 8 cannot adjust the volume Figure 1.

Turn on Boardview of Xiaomi 8, check the volume up key, connect to power chip u601 after resistance R601.

Xiaomi 8 cannot adjust the volume Figure 2.

So we removed the power supply and went to pin and Jump wire to the bottom left corner Capacitor R601.

Xiaomi 8 cannot adjust the volume Figure 3.

Again, the ground value is 473, and the value is normal.After installation, restart the machine, press the volume up key and volume down key of the mobile phone. The volume can be adjusted and the fault can be repaired.