Manual visual inspection mainly involves inspecting PCB solder paste printing and solder joints with the naked eye or with the help of some simple optical amplification instruments; It plays an important role in improving the quality of assembled products. The main detection contents of manual visual inspection include: 1. Solder paste printing. Check item: whether the parameter settings of the solder paste printing machine are correct; Whether the solder paste is printed on the solder pad and its height is consistent or presents a "trapezoidal" shape; The edges of the solder paste should not have rounded corners or collapsed into a pile of shapes. If the distribution of solder paste is uneven, it is necessary to check whether the solder paste on the scraper is insufficient, and also check the printed steel plate and other parameters. Finally, check whether the solder paste is bright after printing under a microscope. 2. Component placement. Inspection items: Before placing components on the first PCB with solder paste, confirm whether the material rack is properly placed, whether the components are correct, and whether the machine's material picking position is correct before printing. After completing the first PCB, conduct a detailed inspection to ensure that each component is correctly placed and lightly pressed in the center of the solder paste, rather than just "placed" on top of the solder paste. If you see a slight dent in the solder paste under the microscope, it indicates that it is placed correctly. Are all components on the material list consistent with those on the PCB, and are all components sensitive to positive and negative electrodes, such as diodes, tantalum electrolytic capacitors, and ICs, placed in the correct direction&Nbsp
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