1. Don't change the component by feeling. Some maintenance personnel did not determine a certain part of the faulty part, but they felt bad, they should be replaced immediately, the misjudging rate was high, and the human damage rate was also high. Automatic lathe processing company

2. The soldering iron should be easily placed in front and stay away from the circuit board for maintenance. The welding head should be appropriately trimmed to adapt to the welding of integrated circuits and other components to avoid welding bumps.

3. Do not cut off the printing circuit at will. Some maintenance personnel have a certain experience in home appliances and are used to disconnected maintenance. But most PCB CNC devices are double -sided metal boards or porous PCB, PCB is thin and dense. Once it is reduced, it is not easy to weld, and the cut line is easy to reduce. In addition, there are points that cannot be cut off at the same time when the adjacent line is cut off at the same time to meet the needs of the output of the line.

4. Measted the resistance between the closed power cord. The measured resistance value should be exchanged twice for red and black marks. The large value should be used as the reference value.

5. The welding layer of most circuit boards is brushed. During the measurement, find the corresponding solder joints as the test point. Do not remove the welding and part of the insulating layer, and only scrape the insulating layer on the welded blade.

6. When removing the circuit board from the automatic lathe, pay attention to its position corresponding to the cable connected to the digital record. For fixed installation circuit boards, front and back should also be provided to remove corresponding pressure connection components and screws. The parts and screws should be stored in a special box to avoid loss. After the assembly is completed, you need to use everything in the box, otherwise the assembly is incomplete.