Third party laboratory for judging the quality of components on circuit boards

Date：2023-06-30 14:25:00Views：319

Judging the quality of components on a circuit board is a very important part of electronic product maintenance. On a circuit board, each component has its own specific function, but if a component fails, it may cause the entire circuit board to malfunction. Therefore, it is very important to quickly and accurately determine the quality of the components on the circuit board, in order to quickly repair problems and avoid unnecessary waste. If you are interested in the upcoming content, please continue reading the following text, hoping it can be helpful to you.

Check appearance

Firstly, the quality of components can be judged by observing their appearance. For example, if the surface of a component shows wear, cracks, or damage, it may be caused by quality issues or improper use of the component. In addition, the pins of the components should also be carefully inspected to ensure that they are not damaged or short circuited.

Test resistance and capacitance

For components such as resistors and capacitors, a multimeter can be used for testing. Set the multimeter to the resistance or capacitance test position, then connect the probe to the pin of the component and observe the reading of the multimeter. Under normal circumstances, the reading should be zero or very close to zero. If the reading is not zero, it indicates that the component may be damaged or poorly connected.

Test diode

Diodes are an important component commonly used in circuits for switching, voltage stabilization, and other functions. A multimeter can be used to test the quality of the diode. Set the multimeter to the diode test position, then connect the probe to the pin of the diode and observe the reading of the multimeter. Under normal circumstances, the reading should be very small, approximately 0.0001 to 0.01 volts. If the reading is large, it indicates that the diode may be damaged.

Test transistor

Transistors are another important component commonly used in circuits for amplification, switching, and other functions. Using a multimeter to test the quality of transistors requires special tools, usually requiring the use of a transistor multimeter. When using a transistor multimeter, it is necessary to short circuit the pins of the transistor and input different voltages in sequence to observe the reading of the multimeter. Under normal circumstances, the amplification factor of the transistor should be very large, and the reading of the input voltage should be very small. If the amplification factor of the transistor is small, it indicates that the transistor may be damaged.

In practical applications, it is necessary to choose different methods based on different components to ensure rapid and accurate identification of the problem and rapid repair of circuit boards. The above is the content related to "component quality judgment" brought about by this core detection. We hope it can be helpful to everyone, and we will bring more exciting content in the future. The company's testing services cover various testing projects, including electronic component testing and verification, IC authenticity identification, product design and material selection, failure analysis, functional testing, factory incoming material inspection, and tape weaving. Welcome to call Chuangxin Testing, we will be happy to serve you.