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Why do PCBA testing? PCBA finished products must be tested and adjusted to meet the specified technical requirements.
Why do PCBA testing?
PCBA finished products must be tested and adjusted to meet the specified technical requirements. PCBA processing is just to assemble, connect and weld hundreds of electronic components according to the design drawings. The characteristic parameters of each component will inevitably have small differences. The comprehensive result will make the PCBA product circuit The large deviations in various performances in the PCBA, coupled with the influence of various distributed parameters generated in the PCBA processing, it is impossible to make the PCBA complete circuit can work normally immediately after assembly, so that the various technical indicators meet the design requirements. Therefore, PCBA testing must be performed.
The purpose of PCBA testing
PCBA testing is to adjust and test the PCBA according to the testing process to make it meet the functions and technical indicators specified in the technical documents. PCBA is not only an important process to ensure and realize the function and quality of electronic products, but also an important link to discover the design, process defects and deficiencies of electronic products. To some extent, PCBA testing provides a reliable basis for the technical performance parameters of electronic products.
Main content of PCBA test
The PCBA test mainly includes the adjustment of circuit parameters, that is, the adjustment of the PCBA adjustable components and the tuning system and mechanical transmission parts related to the electrical indicators to meet the predetermined performance requirements. Based on the basic theory of adjustment, the various technical indicators of the whole machine are systematically tested to make the technical indicators of the PCBA finished product meet the specified requirements. Specifically, the contents of the PCBA test are as follows.
1. Clarify the purpose and requirements of PCBA testing.
2. Choose and use test instruments correctly and reasonably.
3. Adjust and test the PCBA according to the test process.
4. Use basic theoretical knowledge of circuits and components to analyze and troubleshoot faults in debugging.
5. Analyze and process PCBA test data.
6. Compile a test summary based on the test results and put forward suggestions for PCBA processing improvement.
Simple small PCBA processing, such as set-top box modules, semiconductor radio modules, etc., test work is simple, generally after the assembly is completed, the whole machine can be tested directly, and complex whole machines, such as automobile electronic control unit, the test work is relatively heavy, usually Test the unit board or extension first, and after meeting the requirements, perform the final assembly, and finally perform the whole machine test.
PCBA testing is generally carried out in the assembly workshop, strictly in accordance with the testing process. For more complex large-scale equipment, part of the test work or rough adjustment can be carried out in the production plant according to the design requirements, and then the final installation and comprehensive test work can be carried out in the installation site or experimental base in accordance with the requirements of the technical documents.
