PCB layout process, the system layout is completed, to review the PCB diagram, system layout is reasonable, whether it can achieve optimal effect. The following aspects can usually be investigated:
1. whether the layout of the system ensures reasonable or optimal wiring, whether it can ensure the reliable wiring, whether it can ensure the reliability of the circuit work. In layout, it is necessary to understand and plan the direction of the signal as well as the power and ground network.
2. whether the size of the printed board conforms to the size of the processing drawing, whether it meets the requirements of the PCB manufacturing process and whether or not there is any mark of behavior. This requires special attention, a lot of circuit layout PCB board and wiring are beautifully designed, reasonable, but neglect the precise positioning of the connectors, resulting in the design of circuit and other circuits can not docking.
3.There is no conflict between components in 2D and 3D space. Attention is paid to the actual size of the device, especially to the height of the device. The height of the component in the welding free configuration can not exceed 3mm. in general
4. whether the layout of the components in an orderly manner, arranged in order, whether all the cloth finished?. In the layout of components, not only to consider the direction of signal and signal type, need to pay attention to or protect the place, but also consider the overall layout of the device density, so that the density evenly.
5. the replacement of components can be easily replaced, plug-in board inserted into the equipment is convenient?. The replacement of replacement parts and the convenience and reliability of the inserted parts shall be ensured.
6. the layout of the radio part should pay special attention to, to avoid radio frequency interference of other components, so the side must be isolated.