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5 points of attention for PCB reversal technology

2019-08-06 10:32:38
In the research of PCB reverse technology, the reverse push schematic diagram refers to the reverse of the PCB file map or directly draws the PCB circuit diagram according to the physical object of the product, aiming to explain the principle and the working state of the circuit board. In addition, the circuit diagram is also used to analyze the functional characteristics of the product itself. In forward design, general product development must first be schematic design, and then PCB design based on the schematic.

Then, according to the document map or the real thing, how to reverse the PCB schematic, the reverse process should pay attention to those details? Nelco PCB factory china.

1. Reasonable division of functional areas

When the schematic diagram of the PCB board is reversely designed, the reasonable division of the functional area can help engineers reduce unnecessary troubles and improve efficiency in drawing. In general, components with the same function on the PCB will be arranged in a centralized manner, and the functional partitioning area can have a convenient and accurate basis when the schematic is reversed. However, the division of this functional area is not arbitrary. It requires engineers to have a certain understanding of electronic circuit related knowledge. First, find the core components in the functional unit, and then find other components of the same functional unit according to the tracking connection to form a functional partition. The formation of functional partitions is the basis of the schematic. Also, don't forget to use the component serial numbers on the board during this process, which can help you partition your features faster. One-stop Turnkey PCB & PCBA Manufacturing.

2, find the benchmark

This reference piece can also be said to be the main part of the PCB copy board at the beginning of the schematic drawing. After determining the reference components, drawing based on the pins of these reference components can ensure the accuracy of the schematic to a greater extent. For engineers, the determination of the reference part is not a very complicated issue. In general, a component that plays a major role in the circuit can be selected as a reference component. They are usually bulky and have many pins that facilitate stretching. Such as integrated circuits, transformers, transistors, etc., can be used as a suitable reference.

3, correctly distinguish the line, reasonable line

In order to distinguish between ground, power and signal lines, engineers also need to master the relevant power knowledge, circuit connection knowledge, PCB wiring knowledge and so on. The difference between these lines can be analyzed from the connection of the components, the width of the copper foil of the circuit, and the characteristics of the electronic product itself. In the wiring diagram, in order to avoid line crossing and scattering, the grounding line can be used in a large number of grounding symbols. Various lines can be clearly distinguished by using different lines of different colors, and special symbols can be used for various components, and even unit circuits can be drawn separately and finally combined. PCB Manufacturing Services.

4. Master the basic framework and draw on similar schematics

For some basic electronic circuit frameworks and principle drawing methods, engineers need to master not only to directly draw some simple and classic unit circuits, but also constitute the overall framework of electronic circuits. On the other hand, don't neglect the similarity of similar electronic products in the schematic diagram of PCB copy board. Engineers can take advantage of similar circuit diagrams and perform the reverse of new product schematics based on experience.

5, inspection and optimization

After completing the schematic, you must pass the test and check the link to complete the reverse design of the PCB schematic. The nominal values ​​of components sensitive to PCB distribution parameters need to be checked and optimized. The schematics are compared and analyzed according to the PCB file map to ensure that the schematic and the file map are identical. If the schematic layout is found to be unsatisfactory during the inspection, the schematic adjustment will be made until it is completely reasonable, standardized, accurate and clear.