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Diagnosis and maintenance analysis of common faults of 3296 potentiometers
Date：2018-08-07
Views：354
Normal 3296 potentiometer in the process of slow rotation or straight slip, the shaft should be flexible rotation, elastic and appropriate, no mechanical noise. When using multimeter to measure the resistance between the movable arm and the fixed end, the pointer should move smoothly without any treaty drop. Our common 3296 potentiometer failure and maintenance are as follows:
1. Judgement and maintenance of 3296 potentiometers
Because 3296 potentiometer need to constantly adjust the resistance, and the rate of failure is relatively high, the porcine mastiff is characterized by poor contact, complete non-contact or inflexible adjustment, so that the household appliances are noisy or can not work normally, but most of them are reversible and can be repaired. The common faults of 3296 potentiometer are breaking circuit inside pin, breaking switch, burning resistance body, wearing resistance body, excessive rotational noise and so on. The sliding contacts of commonly burned potentiometers will obviously become black and deformed.
2. Fault diagnosis and maintenance of 3296 potentiometers
When the internal pin of the 3296 potentiometer is broken, the 3296 potentiometer will no longer have any effect. The current and voltage of the circuit will not change when the rotating shaft or the sliding handle is pushed. When a multimeter detects resistance between two fixed pins, or before a fixed pin and a sliding contact pin, the resistance is infinite or near infinity. For the sound channel controlled by the volume potentiometer, there may be a silent failure in the opening of the 3296 potentiometer internal pin.
3. Fault diagnosis and maintenance of rotating noise
The main reason for the 3296 potentiometers with large rotating noise is that the resistance body is worn out, the contact between the contact and the resistance body is bad, the resistance value is too small to produce noise, and the 3296 potentiometer of this kind of fault will find the pointer of the multimeter will beat and move unsteadily if the pointer is tested by the multimeter. For this kind of fault, cleaning the shaft of the 3296 potentiometer can basically solve the problem.
It is difficult to repair the potentiometer which has been short-circuited or the resistance body burned out, so the problem of fault can be solved by replacing it directly.
1. Judgement and maintenance of 3296 potentiometers
Because 3296 potentiometer need to constantly adjust the resistance, and the rate of failure is relatively high, the porcine mastiff is characterized by poor contact, complete non-contact or inflexible adjustment, so that the household appliances are noisy or can not work normally, but most of them are reversible and can be repaired. The common faults of 3296 potentiometer are breaking circuit inside pin, breaking switch, burning resistance body, wearing resistance body, excessive rotational noise and so on. The sliding contacts of commonly burned potentiometers will obviously become black and deformed.
2. Fault diagnosis and maintenance of 3296 potentiometers
When the internal pin of the 3296 potentiometer is broken, the 3296 potentiometer will no longer have any effect. The current and voltage of the circuit will not change when the rotating shaft or the sliding handle is pushed. When a multimeter detects resistance between two fixed pins, or before a fixed pin and a sliding contact pin, the resistance is infinite or near infinity. For the sound channel controlled by the volume potentiometer, there may be a silent failure in the opening of the 3296 potentiometer internal pin.
3. Fault diagnosis and maintenance of rotating noise
The main reason for the 3296 potentiometers with large rotating noise is that the resistance body is worn out, the contact between the contact and the resistance body is bad, the resistance value is too small to produce noise, and the 3296 potentiometer of this kind of fault will find the pointer of the multimeter will beat and move unsteadily if the pointer is tested by the multimeter. For this kind of fault, cleaning the shaft of the 3296 potentiometer can basically solve the problem.
It is difficult to repair the potentiometer which has been short-circuited or the resistance body burned out, so the problem of fault can be solved by replacing it directly.