What should I do if the speaker volume regulator doesn't work well?

It can be solved by the following methods:

Method 1: remove the potentiometer and scrub the resistance film with alcohol;

Method 2: Replace the potentiometer.

Generally speaking, the volume adjustment is realized by simulating double potentiometers. Because the potentiometer uses carbon film or metal film as adjustable resistor, it is worn in use, which often leads to the difference in sound size between the two channels or the complete silence of one side.