3296 potentiometer open circuit fault judgment and maintenance knowledge

The 3296 potentiometer is a screw-driven preset resistor with a full stroke of 15 turns or more and a resistance body of up to 300 degrees. Through the rotation of the screw, the contact can be moved on the resistor body, thereby changing the resistance value of the adjustable resistor. The screw of the 3296 potentiometer can be rotated all the time, but after adjusting to a large or small resistance value, the contact will not move with the rotation of the screw, which also plays a special protective role. 3296 potentiometer is a common adjustable resistor in products used in daily life, but many friends are not familiar with or even familiar with the common faults and maintenance of adjustable resistor 329. Here, I would like to explain to you some knowledge about 3296 potentiometer open circuit fault judgment and maintenance.

When the internal pin of the 3296 potentiometer is opened, the 3296 potentiometer will no longer have any function, and the current and voltage of the circuit will not change when the rotating shaft rotates or pushes the sliding handle. When a multimeter detects a resistance between two fixed pins or before a fixed pin and a sliding contact pin, its resistance is infinite or close to infinity. For sound channels controlled by volume adjustable resistors, an open circuit in the internal pin of the 3296 potentiometer can cause a silent failure. 3296 potentiometer bad contact fault judgment and maintenance.

Because 3296 potentiometers need to be adjusted frequently, the failure rate is still relatively high. If the performance is poor contact, completely non-contact or inflexible adjustment. Household appliances may be disturbed by noise or not work properly, but most are reversible failures that can generally be repaired. The common faults of 3296 potentiometer are generally shown as open circuit inside the pin, switch damage, resistance body burned, resistance body wear, excessive rotation noise, etc. The sliding contacts of ordinary burned out 3296 potentiometers will be significantly blackened and deformed.