PCB Technical - ​The maintenance knowledge of PCB circuit board is here!

With the application of PCB circuit boards in various electronic devices, the maintenance of PCB circuit boards has also become a popular field. Today, I will share my own opinions on the maintenance of PCB circuit boards at this stage.

At this stage, the application of circuit boards in China is in various fields. In the early stage of production, the production process and raw materials will be clarified according to their own application requirements. However, with the increase in the application frequency of finished products, more or less will Common faults caused by circuit boards, many people will immediately carry out the replacement of the circuit board, but the huge cost (as small as a few thousand, more than 10,000 or hundreds of thousands of yuan) required to replace the PCB circuit board has also become A very headache for companies. However, in China, such damaged circuit boards can be repaired, and the maintenance cost is relatively cost-effective, accounting for only 20%-30% of the new boards. For some high-density inseparable machinery and equipment, the international ordering of boards and circuit boards is required. The maintenance will be more convenient.

The first step: circuit board inspection

At this stage, many users of manufactured products have no circuit board design drawings after common circuit board failures occur. Many people are suspicious of PCB circuit board maintenance, despite all kinds of circuit boards. Each is different, but what remains the same is that each PCB circuit board is composed of various field effect transistors, resistors, capacitors and other components. Therefore, the damage of the PCB circuit board must be in one or some of them. The concept of PCB repair is created based on the above elements caused by the destruction of components. The maintenance staff will first carry out the circuit board inspection, step by step to find the root cause of the problem, and carry out the replacement of the parts.

Step 2: Parts replacement

After finding the root cause of common circuit board failures, maintenance engineers will strongly recommend matching replacement parts to the application standards of all circuit boards based on the characteristics of the original parts. The user can select and replace according to his own needs. I won't make too many indications here.

The third step: on-machine operation inspection

After repairing the circuit board, it is important to evaluate whether the repair is successful or not. Here I suggest that you maintenance technical engineers slowly accumulate experience in the whole process of PCB circuit board maintenance, inspection and repair., Constantly improve the standard. General electronic products are all made up of countless electronic devices. During maintenance and repair, it will be very time-consuming to check every electronic device in the PCB circuit board one by one to find the problem. It's also very difficult to get up. Then the maintenance method from the common failure condition to the incomprehensible maintenance method due to the common failure is a key maintenance method. If the PCB circuit board is checked out, the repair is very easy.