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bourns 3296WMaintenance Analysis of bourns 3296W Potentiometer
Date:2019-03-08 Views:404

Common Faults Judgment and Maintenance Analysis of bourns 3296W Potentiometer:

The normal bourns 3296Wpotentiometer should rotate flexibly, tighten properly and have no mechanical noise in the process of slow rotation or direct sliding. When measuring the resistance between the movable arm and the fixed end with a multimeter, the head pointer should move smoothly and there is no treaty drop. There are several common faults and maintenance of bourns 3296W potentiometers:

1. Diagnosis and Maintenance of Bad Contact Fault of bourns 3296W Potentiometer

Because bourns 3296W potentiometers need constant adjustment and resistance, and the failure rate is relatively high, pig mastiff is characterized by poor contact, completely non-contact or inflexible adjustment, making household appliances noisy or unable to work normally, but most of them are reversible faults, which can generally be repaired. Common faults of bourns 3296W potentiometer are generally manifested in pin internal circuit breaking, switch damage, resistance body burnout, resistance body wear, excessive rotation noise, etc. The sliding contacts of common burned potentiometers will be blackened and deformed obviously.

2. Judgment and Maintenance of Breaking Circuit Fault of bourns 3296W Potentiometer When the internal pin of bourns 3296W potentiometer is broken, bourns 3296W potentiometer will no longer play any role. The current and voltage of the circuit will not change when rotating the shaft or pushing the sliding handle. When the multimeter detects the resistance between two fixed pins, or before the fixed pin and the sliding contact pin, the resistance is infinite or near infinite. For the voice channel controlled by volume potentiometer, the opening of the internal pin of bourns 3296W potentiometer may cause silent failure.

3. Fault Diagnosis and Maintenance of Rotating Noise

The main reason for the high rotating noise of bourns 3296W potentiometer is the wear of the resistor body. It is the bad contact between the contact point of moving piece and the resistor body, and the value of resistance varies from big to small, resulting in noise. If this kind of fault of bourns 3296W potentiometer is detected by pointer multimeter, it will be found that the pointer of the multimeter will jump and move unsteadily. For this kind of fault, clean the rotating shaft of bourns 3296W potentiometer, which can basically solve the problem.

Potentiometers that have been short-circuited or burned out by resistors are usually difficult to rest, so they can be replaced directly to solve the problem of faults.