A potentiometer with a rotary switch, commonly used for tuning functions, comes in 3-pin and 5-pin versions, and is frequently used in audio equipment. So, when audio equipment malfunctions, is it possible that the potentiometer with a rotary switch is faulty?

How to Judge This!

Please open the four legs of the black base on the potentiometer, wipe the resistance coil with alcohol, and see the effect.

The reading of 09.7 at the 200 level is abnormal based on the data.

Connect the table rod to the feet on both sides and measure the total resistance. It should be within 100Ω, with a tolerance of ±5%. A resistance range of 95Ω to 105Ω is considered normal.

Regarding the 0.5Ω shift to the small display, this is normal based on our factory's data. It is due to the influence of the zero-point resistor potentiometer, as well as the wire resistance of copper or aluminum in the connection of the test leads, commonly referred to as milliohmic resistance.