PCB Technical - Circuit board maintenance steps

Circuit board maintenance steps
At present, the country has higher and higher requirements for environmental protection and greater efforts in link governance. This is a challenge but also an opportunity for PCB factories. If PCB factories are determined to solve the problem of environmental pollution, then FPC flexible circuit board products can be at the forefront of the market, and PCB factories can get opportunities for further development.
The Internet era has broken the traditional marketing model, and a large number of resources have been gathered together to the greatest extent through the Internet, which has also accelerated the development speed of FPC flexible circuit boards, and then as the development speed accelerates, environmental problems will continue to appear in PCB factories. In front of him. However, with the development of the Internet, environmental protection and environmental informatization have also been developed by leaps and bounds. Environmental information data centers and green electronic procurement are gradually being applied to the actual production and operation fields.
In the circuit board maintenance, if you encounter a DC power supply short-circuit fault, it should be a headache for beginners, because the fault involves too many components and it is too troublesome to troubleshoot. Many beginners I changed this for that, and finally found out where the fault was. The board was already riddled with holes, so is there any way to quickly locate the fault point?
Quick maintenance process: two steps

1. Lock the fault area. Divide the area of all circuits powered by VCC, find the fork along the copper foil of the power supply, and then use a knife to cut the fork at the fork. The intention is to divide the power supply circuit into two parts to divide the fault area and the non-fault area. Measure the resistance to ground separately, the side where the resistance to ground is zero is the fault area, and then find the next branch along the copper foil, and so on, reduce the fault range step by step, and finally lock it in a small range .
2. After locking the range within a certain range, it is necessary to check related components. Generally, integrated circuit chips, capacitors and transistors are likely to cause short-circuit failures, so they should be checked in order from largest to smallest. First of all, for the integrated chip, you can lift the power supply foot to separate it from the power supply circuit, and then measure the resistance of VCC to ground. After troubleshooting, connect the previously cut copper foil. iPCB is happy to be your business partner. Our business goal is to become the most professional prototyping PCB manufacturer in the world. With more than ten years of experience in this field, we are committed to meeting the needs of customers from different industries in terms of quality, delivery, cost-effectiveness and any other demanding requirements. As one of the most experienced PCB manufacturers and SMT assemblers in China, we are proud to be your best business partner and good friend in all aspects of your PCB needs. We strive to make your research and development work easy and worry-free.
quality assurance
iPCB has passed ISO9001:2008, ISO14001, UL, CQC and other quality management system certifications, and produces standardized and qualified PCB products. We master complex process skills and use professional equipment such as AOI and Flying Probe to control production, X-ray inspection machines, etc. . Finally, we will use double FQC inspection of appearance to ensure shipment under IPC II standard or IPC III standard.