During the PCB layout process, after the system layout is completed, the PCB diagram should be reviewed to see if the layout of the system is reasonable and whether the optimal effect can be achieved. It can usually be examined from the following aspects:
1. Does the system layout ensure that the wiring is reasonable or optimal, whether the wiring can be reliably carried out, and whether the reliability of the circuit operation can be guaranteed. In the layout, you need to have an overall understanding and planning of the direction of the signal and the power and ground network.
2. Whether the size of the printed board is consistent with the size of the processed paper, whether it meets the requirements of the PCB manufacturing process, and whether there is a mark of behavior. This point requires special attention. Many PCB boards are designed and routed beautifully and reasonably, but neglected the precise positioning of the positioning connectors, resulting in the design circuit not being able to interface with other circuits.
3. Whether the component has conflicts in two-dimensional or three-dimensional space. Note the actual size of the device, especially the height of the device. In the welding-free layout of components, the height can not exceed 3mm.
4. Whether the component layout is dense and orderly, neatly arranged, and whether it is completely finished. In the layout of components, not only the direction of the signal and the type of signal, the place that needs attention or protection, but also the overall density of the device layout should be considered, so that the density is uniform.
5. Whether the components that need to be replaced frequently can be easily replaced, and whether the plug-in board is inserted into the device is convenient. It should be convenient and reliable to replace and plug in frequently replaced components.
6. Adjust whether the adjustable components are convenient.
7. Is there a proper distance between the thermal element and the heating element?
8. Whether there is a radiator or fan in the place where heat is needed, whether the air flow is smooth. Pay attention to the heat dissipation of components and boards.
9. Whether the signal direction is smooth and the interconnection is the shortest.
10. Whether the plug, socket, etc. are in contradiction with the mechanical design.
11. Is the interference problem of the line considered?
12. Whether the mechanical strength and performance of the board are considered.
13. The artistic layout of the board layout and its aesthetics.
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