The circuit board maintenance technology is very integrated, and its maintenance can be said to be very delicate. The circuit board maintenance technology is also called chip level maintenance technology, which shows its degree of detail.
In the process of circuit board maintenance, sometimes a small careless mistake may cause damage to components or even the whole board. Therefore, for beginners of circuit board maintenance technology, it is particularly important to be careful, and we also emphasize a lot of details every day. The main points of * can be summarized as follows:;
**The principle of "first look, then do it". Do not toss a soldering iron on any faulty circuit board when you get it. First observe the maintenance value, wiring method, component model, function of the board, fault performance and other information. Only after having a preliminary understanding of the whole board can precision processing be carried out on parts.
**The "forced removal principle" is that any removal that requires the use of a soldering iron must be the latter option. Some components that can be monitored online should not be removed in principle. Real circuit board maintenance experts will only be careful to monitor each component of the circuit board and determine the fault point before further handling, Therefore, the circuit boards that have been repaired do not even have maintenance traces, which has little impact on the stability of the board.
Third, the "Parker principle", which is a product of the SMT chip era, means that when the circuit board is being repaired, you can only handle it gently and carefully. Some beginners are careless, and the removal method of components is brutal, which is wrong. Even if some components are not damaged, if the tin disk of the circuit board is pulled up or even pulled short, the tin disk must be repaired again. The difficulty of this work will multiply, and the stability of the circuit board will be affected after maintenance.
In conclusion, the main precautions for circuit board maintenance can be summarized from "chip level maintenance".
