What are the failure characteristics of electronic components?

Date：2021-10-20 15:58:49Views：1128

After entering the 21st century, electronic information technology has become the most important technology, and electronic components are the premise of the development of electronic information technology. In order to promote the further development of electronic information technology, it is necessary to improve the reliability of electronic components. The damage of electronic components is generally difficult to be noticed by the observer. In many cases, it needs to be detected and judged with the help of instruments. The following contents are sorted out by the core detection network for your reference.

Most of the failures in electronic equipment are ultimately caused by the failure of electronic components. If you are familiar with the fault types of components, sometimes you can quickly find the fault components through intuition, and sometimes you can find the fault through simple resistance and voltage measurement. Whether the fault is caused by natural loss or man-made damage, it can be divided into three types: open circuit of circuit contact, damage of electronic components and software fault. Contact open circuit is generally caused by broken wire, disconnected plug-in, poor contact, etc., which is generally easy to repair. The damage of electronic components (except obvious burning and heating) is generally difficult to be found by the observer. In many cases, it is necessary to detect and judge with the help of instruments.

The main failure causes of electronic components can be divided into two categories, namely, the failure caused by inherent defects of components and the failure caused by improper use. According to statistics, the ratio of these two types of failure accounts for about 50% respectively. Most of the inherent defects of components are due to problems in design materials and production process, leaving potential hidden dangers. When these components are installed into the whole machine for a period of time, they will eventually fail under the action of various external stresses. The following is the reference of common electronic component fault characteristics in mobile phone maintenance provided by Chuangxin testing:

1. Integrated circuit: generally local damage, such as breakdown, open circuit, short circuit, etc. The power amplifier chip is easy to be damaged, and the memory is prone to software failure. Other chips sometimes have solder joints.

2. Triode: breakdown, open circuit, serious leakage and parameter deterioration.

3. Diode (rectifying, lighting, voltage stabilizing and varactor): it is easy to be broken down and open circuit, making the forward resistance larger and the reverse resistance smaller.

4. Resistance: Generally speaking, the actual efficiency of resistance is relatively low. However, the resistance plays a very important role in some important circuits. The change of resistance value will change the static working point of the triode, resulting in the abnormal operation of the whole unit circuit. The actual function of resistance is: desoldering, the resistance value becomes larger or smaller, and the temperature characteristic becomes worse.

5. Capacitance: divided into polar electrolytic capacitance and non-polar electrolytic capacitance. The effective characteristics of electrolytic capacitors are: breakdown short circuit, increased leakage, reduced capacity or open circuit. The effective characteristics of non-polar capacitor are: breakdown, short circuit or desoldering, serious leakage or resistance effect.

6. Inductance: the effective characteristics are: disconnection and desoldering.

The above is the relevant content of "electronic component failure" brought by the core creation test. Through this article, I hope it can be helpful to you. If you like this article, you might as well continue to pay attention to our website, and we will bring more wonderful content later. If you have any needs related to the inspection and testing of electronic products, please call Chuangxin testing, and we will serve you wholeheartedly.