Automatic numerical control instrument lathe maintenance matters needing attention
When removing a circuit board from a fully automatic CNC lathe, pay attention to the position of the corresponding cable connected to the digital record, for a fixed installation of the circuit board, should also provide before and after, remove the corresponding compression parts and screws. The parts and screws should be placed in a special box so that they will not be lost. After assembly, all the things in the box will be used, or the assembly will be incomplete.
Most PCB solder layer brushes, so the measurement should find the corresponding solder spot as the test point, do not remove the solder strip and some of the brush insulation layer, only in the solder spot blade scratch insulation layer.
Automatic CNC instrument lathes should not cut off the printed circuit at will. Some maintenance personnel have certain experience in home appliance repair, used to break line to check, but most of the printed circuit board nc equipment of double metal orifice or multi-layer circuit boards, printed circuit board thin, dense, once it is not easy to cut the welding, and tangent easy cut in addition, some point, adjacent line, cut a line, can't make it and need to cut off the line output work of a few lines at the same time.
Measure the resistance between the closed power lines. The measured resistance should be red. The black watch pen should be measured twice interchangeably.
The soldering iron should be easily placed in front away from the repair circuit board. The soldering tips should be properly trimmed to fit the welding of integrated circuits and other components to avoid welding bumps.
Components should not be replaced by feel. Some maintenance personnel in the absence of a component of the fault element, just feel bad, should be replaced immediately, so the misjudgment rate is higher, removed parts of the artificial damage rate is higher.