How to check the accuracy of PCB copy board?

Posted by davidsmithsmile on August 23rd, 2021

Many friends don’t know how to copy the board when copying an electronic product. Let the engineer talk with you today, how to check the accuracy of pcba manufacturing copying?

1. First prepare the circuit boards of this electronic product, at least three.
2. Disassemble one of them and make a copy; copying is carried out in the following steps:
(1) Understand whether the product\'s single-chip computer needs program analysis, if necessary, you need to remove the single-chip computer to save;
(2) Copy and measure the electronic components on the circuit board, and make a good position identification;
(3) Copy the PCB circuit diagram; make the circuit board proofing after copying.
3. After proofing the circuit board, disassemble the prepared components and transplant them to the new production circuit board, and then carry out the installation test!
(1) If there is a problem with the test, first check whether the components are transplanted correctly, and then check whether there is a problem with the copied circuit diagram. If the transplantation installation test passes, it proves that the copy of the circuit board is correct.
(2) Next, buy the copied components, solder the new components to the finished circuit board, and then install the machine for testing. If an abnormality is found, it proves that the purchased component is not correct. At this time, two aspects must be checked: check whether the purchased component is consistent with the copied component, or check whether the copied component has a copy error position; then correct the electronic component and install it.
(3) Finally, process the MCU program, crack the MCU program for installation test, and replace the new MCU with the ready-made circuit board for testing.
4. After troubleshooting one by one, the prototype can be produced, and mass production can be carried out without any problems.

The above is the method that the engineer explained for you in detail on how to check the accuracy of SMT pcb assembly copying. Have you mastered it?

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davidsmithsmile
Joined: April 2nd, 2021
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