In industrial production, specialized component screening and testing workshops are set up, equipped with many universal and specialized screening and testing equipment and instruments. However, for amateur enthusiasts, these conditions cannot be met. Even so, they must not give up the screening and testing of components, as many electronic enthusiasts use mail orders, including genuine and defective products, and more are surplus or utility products, If they are not screened and tested before installation, and once soldered into the printed circuit board, it is found that the circuit cannot function properly, then checking it not only wastes a lot of time and effort, but also easily damages the components and printed circuit board when disassembled. This article has collected and organized some materials, hoping to have significant reference value for readers
First, inspection of appearance quality
This is a simple and feasible inspection method that can detect early defects and damage during the procurement process of some electronic components.
. When identifying and testing electronic components, the following operations should be followed:1) The model, specification, manufacturer, and place of origin of the components must comply with the design requirements, and the outer packaging must be intact 2) Check the appearance of the components to ensure that they are intact and free from defects such as dents, scratches, and cracks on the surface. Components with coatings on the outside must be free from detachment and scratches
3) The electrode leads of components should be free from crimping and bending, and the coating should be intact, smooth, and free from oxidation and corrosion 4) The model and specification markings on the components should be clear and complete, and the position and color of the color code should meet the standards. The characters on the integrated circuit should be carefully checked
5) The dimensions of the components of the mechanical structure should be qualified, the threads should be flexible, and the rotational feel should be appropriate
6) Switching components operate flexibly and have a good touch; The connector should have appropriate tightness and good contact. The components in various electronic products have their own characteristics, and the inspection content should be determined according to the specific requirements of each component
Function of testing report:
1. Project bidding: Issue authoritative third-party CMA/CNAS qualification report
2. Online e-commerce platform entry: Quality inspection report recognized by major e-commerce platforms 3. Used as a sales report: issuing legally effective testing reports to make consumers more confident 4. Papers and research: Provide professional personalized testing needs 5. Judicial services: providing scientific, fair, and accurate testing data 6. Industrial problem diagnosis: Verify the troubleshooting and correction of industrial production problemsBaijian and testing process:
1. Telephone communication and confirmation of requirements
2. Recommend solutions and confirm quotations 3. Mail samples and arrange testing 4. Progress tracking and result feedback 5. Provide reports and after-sales service 6. If urgent or priority processing is requiredTesting and testing characteristics:
1. The testing industry is fully covered, meeting different testing needs
2. Fully cover the laboratory and allocate localized testing nearby3. Engineers provide one-on-one services to make testing more accurate
4. Free initial testing, with no testing fees charged
5. Self service order delivery for free on-site sampling
6. Short cycle, low cost, and attentive service 7. Possess authoritative qualifications such as CMA, CNAS, CAL, etc 8. The testing report is authoritative and effective, and is generally used in China