How to judge bad synchronization of adjustable potentiometer

How to judge bad synchronization of adjustable potentiometer?

1. Check whether there is glue on the terminal;

2. The potentiometer disassembles the product to check whether the brush is deformed, whether the brush is loose and whether the brush track is deviated;

3. Check whether there is foreign matter on the surface of the carbon sheet and whether there is serious scratch on the surface of the carbon sheet;

4. Potentiometer shall check whether there is any carbon chip cracking, loose terminal and bad terminal contact;

5. Check whether the inner and outer connections of the brush track start at the same Angle. http://www.abf.wang/

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