Summary of PCB Maintenance Knowledge
2022-04-14
With the use of PCB in major electronic products, PCB maintenance has become a hot industry. Today, Xiaojie elder brother for the current PCB circuit board maintenance for everyone simple to share their views.
At present, there are various industries that use circuit boards in our country. In the early stage of production, the production process and raw materials will be determined according to their own use requirements. However, with the increase of the use frequency of finished products, circuit board failures will occur more or less. Many people will directly replace circuit boards before, but the high cost of replacing PCB circuit boards (as little as several thousand yuan, many tens of thousands or hundreds of thousands of yuan) has also become a very headache for enterprises. However, these damaged circuit boards can be repaired in China, and the maintenance cost is relatively affordable, accounting for only 20%-30% of the new boards. For some high-tight equipment, the maintenance of circuit boards will be faster.
The first step: circuit board detection
At present, many users of finished equipment basically do not have the design drawings of the circuit board in their hands after the circuit board failure occurs. Many people will be skeptical about the maintenance of the PCB circuit board. Although various circuit boards are very different, what remains unchanged is that each PCB circuit board is composed of various integrated blocks, resistors, capacitors and other devices, so the damage of the PCB circuit board must be caused by the damage of one or some of the devices, the idea of PCB circuit board maintenance is based on the above factors. The maintenance staff will first carry out the inspection of the circuit board, step by step to find out the source of the problem, and replace the parts.
Step 2: Parts Replacement
After finding the source of the circuit board failure, the maintenance engineer will recommend the corresponding replacement parts for the use conditions of the entire circuit board according to the performance of the original parts. Users can choose to replace them according to their own needs. The process of replacing the parts will not be described here.
Step 3: On-machine detection
After maintenance, the on-board inspection of the circuit board is the key to judge the success of the maintenance. Here, Xiaojie Ge suggests that maintenance engineers gradually accumulate experience and continuously improve their level in the process of maintenance, testing and overhaul of PCB circuit boards. General electronic equipment is composed of thousands of components, in the maintenance, repair, if you rely on a direct test to check each component in the PCB circuit board to find the problem will be very time-consuming, the implementation is also very difficult. Then from the fault phenomenon to the cause of the fault, the number of seat type maintenance method is an important maintenance method. As long as the PCB circuit board detects the problem, it is easy to repair.
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