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The dial potentiometer is also a kind of potentiometer commonly used in the market of the tuning function. We also have many models of dial potentiometers for customers to use in the circuit. Today, let's introduce the relevant knowledge of dial potentiometers, including the wiring method of dial potentiometers, precautions for use of dial potentiometers, and how to clean dust and debris, I hope to know more about the dial potentiometer for those who have just come into contact with it. Wiring method of dial potentiometer The first pin of the dial potentiometer from the left is the common terminal, the second and third pins are the left and right dual-channel outputs, and the fourth and fifth pins are the left and right dual-channel inputs. The left channel is connected to the left channel with a wire, and the right channel is connected to the right channel with a wire. The grounding terminal can be left unused temporarily. The dial potentiometer has three points: line input, line output, and ground terminal. As for the output corresponding to the input, it depends on the metal contact piece on the plastic knob. Generally, the signal direction of PCB base plate is from left to right. The first hole is grounded, the second hole is left channel output, the third hole is right channel output, the fourth hole is left input, and the fifth hole is right channel input. Connect the second hole and the fourth hole with wires, and the third hole and the fifth hole can be connected. Precautions for use of dial potentiometer 1. The dial potentiometer has been used for a long time. It is necessary to regularly clean some dust and sundries on the potentiometer shaft. If it is not cleaned, the accumulated dust will affect the output between lines, and may cause failure in adjustment. 2. For the internal open circuit of the dial potentiometer pin or the burning of the resistor body, such faults are generally inconvenient to repair. It is recommended to replace the components. 3. On the wiring of the dial potentiometer, all lines should not be connected incorrectly. If there is a wrong connection, the output of the lines may be incompatible, which may damage the potentiometer. So pay attention to wiring. How to clean the dust and sundries of the dial potentiometer 1. First, carefully open the fixing slot of the cover of the dial potentiometer with a screwdriver, and then remove the potentiometer. 2. Then take out the fixed rotary shaft of the dial potentiometer. Some dial potentiometers cannot take out the rotary shaft. At this time, some dust and sundries on the rotary shaft of the potentiometer can be cleaned directly with cotton ball dipped with pure alcohol. 3. After cleaning, some lubricating oil or special grease can be applied on the rotating shaft to delay the service life of the potentiometer. 4. Finally, reinstall and fix the dial potentiometer.