What are the common faults and solutions of resistors?

Resistors may encounter various faults in electronic circuits, and understanding these faults and their solutions is crucial for maintaining the normal operation of the circuit. Here are some common resistor faults and their corresponding solutions:

Common faults
Open circuit fault: The conductive material inside the resistor breaks, causing the resistor to no longer conduct electricity. It can be identified by visually inspecting the surface of the resistor for signs of cracks or burning. The solution is to replace the faulty resistor.
Resistance drift: Due to temperature changes, material aging, or other environmental factors, the actual resistance value of a resistor may deviate from its nominal value. This can be detected by measuring the resistance value using a multimeter. If the resistance value exceeds the allowable error range, the resistor should be replaced.
Overheating: Resistors may overheat when subjected to excessive current, resulting in decreased performance or damage. Checking whether the resistor is overheated can be done by touching or using an infrared thermal imager. The solution is to ensure that the power level of the resistor is suitable for its use in the circuit and check for short circuits or other abnormal conditions in the circuit.
Corrosion or contamination: The pins or surfaces of resistors may have poor contact due to corrosion or contamination. This can be solved by cleaning the pins and surface of the resistor and ensuring that the resistor is securely installed.
Welding issue: If the pins of the resistor are not properly soldered to the circuit board, it may result in poor contact or resistor detachment. Check if the welding points are secure and re weld if necessary.
Mechanical damage: Resistors may be damaged due to physical impact or improper operation. Check for visible damage to the resistor and replace it if necessary.
Aging: Over time, the material of the resistor may age, leading to a decrease in performance. Regular inspection and replacement of aging resistors can prevent this type of malfunction.
Environmental factors: Humidity, chemicals, and other environmental factors may affect the performance of resistors. Ensure that the circuit board and resistors are stored in a suitable environment to avoid exposure to harmful conditions.
Design issue: Improper selection of resistors or circuit design may result in resistor overload or inappropriate operating conditions. During the design phase, resistors should be carefully selected and ensured to meet the requirements of the circuit.
Manufacturing defects: Sometimes resistors may have defects during the manufacturing process. If you suspect a manufacturing defect, you can try contacting the manufacturer for a replacement or refund.
resolvent
Replace faulty resistors: For irreparable faults such as open circuits, short circuits, or severely aged resistors, they should be replaced in a timely manner to ensure the normal operation of the circuit.
Cleaning and reinforcing pins: For poor contact caused by corrosion or contamination, the problem can be solved by cleaning the pins and surface, or re soldering.
Check circuit design: For faults caused by improper design, the circuit design should be carefully checked to ensure that the selection and layout of resistors meet the requirements of the circuit.
Environmental control: Ensure that circuit boards and resistors are stored in a dry, non corrosive environment to avoid environmental factors affecting the performance of resistors.