The so-called details determine success or failure. In the process of PCB copying and PCB design, there are also many small details worth paying attention to. If not careful, common mistakes may be made, which not only affects work efficiency but also the performance of the circuit board.

Common errors in PCB reverse engineering schematic:

(1) ERC report pin not connected to signal:

a. I/O properties were defined for the pins when creating the encapsulation;

b. Inconsistent grid properties were modified when creating or placing components, and the pins and wires were not connected;

c. When creating components, the pin direction must be reversed, and the non pin name end must be connected;

(2) The component ran outside the drawing boundary: no component was created in the center of the component library chart paper;

(3) The created project file netlist can only be partially imported into PCB: global was not selected when generating netlist;

(4) When using components composed of multiple parts created by oneself, do not use annotates;

Common errors in PCB:

(1) When loading the network, report that the Node was not found:

a. The components in the schematic use packaging that is not available in the PCB library;

b. The components in the schematic use packaging with inconsistent names in the PCB library;

c. The components in the schematic use packaging with inconsistent pin numbers in the PCB library For example, in a transistor, the pin numbers in SCH are e, b, and c, while in PCB they are 1, 2, and 3

(2) Always unable to print on a single page of paper during printing:

a. When creating the PCB library, it was not at the origin point;

b. The components have been moved and rotated multiple times, and there are hidden characters outside the PCB board boundary. Select to display all hidden characters, shrink the PCB, and then move the characters within the boundaries.

(3) The DRC report network is divided into several parts:

Indicates that this network is not connected. Please refer to the report file and select CONNECTED COPPER to search

Also, remind friends to try using WIN2000 as much as possible to reduce the chance of blue screens; Export the file multiple times to create a new DDB file, reducing file size and the chance of PROTEL freezing If making complex designs, try not to use automatic wiring.