Circuit Board Diagnostic Repair

The research object of this paper is mainly the circuit board, and the specific maintenance measures can be known through the detailed diagnosis of the common problems of the circuit board. Different fault problems should adopt different maintenance strategies accordingly. In fact, through a comprehensive analysis of electronic equipment circuit board failures, we can clearly understand that timely operation and maintenance of equipment is very necessary. With the help of the following measures, the quality of circuit board work can be effectively improved, and its safety and reliability can also be steadily improved. First, the diagnosis methods in the case of circuit board failure are summarized, including measurement method, elimination method and replacement method. Secondly, the specific maintenance strategies are summarized and summarized, including cleaning and rust removal measures, detecting fuses, detecting components, and finding corrosion points, etc.

The innovation of electronic equipment is inseparable from the development of advanced science and technology. With the support of technology, there are various forms of electronic equipment circuit boards, not only in the form of double-sided boards but also in the form of multi-layer boards. In fact, the scientific integration of electrical equipment layout and the mass production of fixed circuits will be affected by its different forms, which have very special practical value. Today's circuit system construction is becoming more and more diversified and intelligent, and it is conceivable that the problem of circuit board failure will gradually increase. In order to ensure that related equipment can serve enterprises or individuals more efficiently, it is necessary to strengthen the operation and maintenance efficiency of vehicles in a timely manner, and solve existing failure problems in a timely manner.

1. Overview of common circuit board fault diagnosis methods

Whether it is to replace the circuit board of electronic equipment or perform professional maintenance on it, before taking specific measures, it is first necessary to judge the integrity of the structure in time and accurately judge the fault factors related to the equipment. Therefore, this article summarizes three common and efficient methods of diagnosing faults, and presents their working principles in time.

1. About the working principle of the measurement method

When carrying out the measurement method, it is first necessary to use a multimeter device to measure the output voltage parameters of the relevant device. On this basis, its failure can be evaluated and determined. Of course, fault diagnosis workers must have a very deep understanding of machinery and equipment, be able to master the corresponding basic knowledge, especially have a very clear understanding of the value range of the device output voltage parameters. After summarizing the practical experience, we can know two different value methods: first, the value range is clarified according to the detailed data provided by the manufacturer. The second is to perform accurate measurements when using the board for the first time, and then use it as baseline data.

2. About the working principle of the exclusion method

The basic principle of the elimination method is now summarized as follows: relevant workers can further determine the main cause of the fault phenomenon based on the operating principle of the circuit board device, and then can adopt simple to complex working principles to eliminate the fault problems one by one. Often times, board failures are found in the last components tested. In fact, the specific fault diagnosis method is based on the path from the mechanical failure of the circuit board connection to the mechanical failure of the circuit board accessory device. Practice has proved that this method of troubleshooting has a very efficient effect. In comparison, the exclusion method has many advantages, such as strong controllability and operability.

3. About the working principle of the substitution method

The so-called replacement method is to replace the circuit board in the same state, so as to compare and detect the fault. In order to achieve a certain economic effect, the common diagnostic work is as follows: Assume that when the mechanical equipment of the same model is running, if it is necessary to diagnose the problem of the circuit board of a certain mechanical equipment, it is necessary to distinguish the circuit board from the normal operation. Replacement of mechanical equipment. Under this operation, assuming that the failure problem still exists after the replacement operation is implemented, it can be concluded that the circuit board has a failure problem at this time.

2. Important measures for efficiently repairing circuit board failures

1. Timely implement the work content of cleaning and derusting

In fact, it is unavoidable that some substances or adsorptive impurities appear in the circuit board device. However, when these adsorptive substances appear in the circuit board device, it will limit the heat dissipation of related components, and even make the circuit The board is paralyzed. If the circuit board is severely damaged, it will be difficult for the device to continue to operate. Especially when the adhesive dust appears at the corner of the chip, it will make the quality of the chip components not high, and even cause the problem of short circuit on the circuit board. It can be seen that it is very necessary to carry out cleaning and derusting maintenance on the circuit board in time to reduce the interference of adhesive dust on the equipment in time.

2. Scientific detection of fuse device

For safety reasons, fuse parts are installed in the circuit board assembly. In this way, even when the circuit board passes through high current, it can still protect the components and prevent the components from being damaged. That is to say, during detection, it is also necessary to detect the fuses in the circuit board device in time to grasp the damage status of the fuses. When there is a problem that the fuse is damaged, it must be replaced in time, that is, the fuse of the same type should be used.

3. Research on the problem of component damage

Before performing circuit board repair work, the different components must be carefully observed and evaluated based on the observations. Usually there are three types of failures: the first is the crack problem, that is, the circuit board component capacitance becomes larger, and cracks and other phenomena exist at the same time; the second is that the triode is burned, showing a penetrating state. The third is that the resistance element is blown, which cannot achieve timely protection. In response to this phenomenon, it is necessary to replace the device of the same model in time to solve the problem of circuit board failure.

4. Detect corrosion spots and virtual welding problems

Due to the existence of manufacturing process factors, it will have a great impact on the internal circuit board device of some mechanical equipment. After a period of operation, there will be a certain degree of virtual welding at the corners of some components. In addition, the circuit board assembly also suffers from corrosion problems under the influence of a humid environment. In fact, the humid environment is not conducive to the normal operation of the circuit board device of electronic equipment, so the operating efficiency of some of its components will be greatly affected. In view of the above problems, it is necessary to implement false welding measures at the location of the fault. At the same time, the maintenance method of secondary connection can also be adopted according to the actual conditions.

Nowadays, the level of science and technology in our country has been significantly improved, and there are more and more talents with advanced skills. It can be seen that the speed of my country's modernization development will have a very gratifying improvement. Since the operation effect of the power system is closely related to people's daily life, relevant departments need to strengthen the control of electronic equipment in a timely manner, give full play to the skills and rationale of advanced talents, and improve the effect of circuit board maintenance.

The above is the diagnosis and maintenance technology of the circuit board introduced by Shenzhen Zuchuang Microelectronics Co., Ltd. for you. If you have software and hardware function development needs for smart electronic products, you can rest assured to entrust them to us. We have rich experience in customized development of electronic products, and can evaluate the development cycle and IC price as soon as possible, and can also calculate PCBA quotations. We are a number of chip agents at home and abroad, including MCU, voice IC, Bluetooth IC and modules, wifi modules. We have hardware design and software development capabilities. Covering circuit design, PCB design, single-chip microcomputer development, software custom development, APP custom development, WeChat official account development, voice recognition technology, Bluetooth wifi development, etc. It can also undertake the research and development of smart electronic products, the design of household appliances, the development of beauty equipment, the development of Internet of Things applications, the design of smart home solutions, the development of TWS solutions, the development of Bluetooth audio, the development of children's toys, and the development of electronic education products.