First of all, you have to buy some simple necessary maintenance tools, such as multimeter, ferrochrome, hot air gun, maintenance power supply, preferably more than three channels, 5a, 30v, manual tin sucker and so on. At the beginning, these were basically enough. You'd better buy an oscilloscope if you have enough conditions.

Second, the basic knowledge of electronic components, identification and testing. There are many tutorials and books on this website. No matter which author wrote it, the measurement method is similar. If there is a new method, many new books will be collected immediately, and there are many free videos to watch online.

Third, the formation of practical ability. When studying electronic components, Teacher Guan suggested finding more waste boards, which can be used to measure electronic components, experience online and offline testing methods and practice welding level.

Fourth, read some books on the basics of electronic technology. For example, the series-parallel knowledge of resistors and capacitors, some typical switching power supply circuits, etc. So as to have a basic understanding of electronic technology.

5. Route along the circuit board. With the foundation of the previous steps, we can concentrate and run more different boards. It would be better if we could draw a schematic diagram, which is helpful to understand the circuit.

Sixth, actually repair the circuit board and accumulate experience. No matter which way you teach yourself, the most important purpose is to repair the faulty circuit board. The teacher thinks this is the only way to improve the level of circuit board maintenance.

7. What we need to learn at this stage is maintenance experience and many testing methods, which are only available for maintenance, but not for training institutions. For example, the construction of servo-driven test platform and the maintenance of numerical control system. , these can only be actual maintenance.