PCB News - Six inspection methods of PCB circuit board short circuit

PCB circuit board short circuit inspection method
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.
Pay attention to product innovation in terms of energy saving and emission reduction. PCB factories must learn to attach importance to Internet technology and realize the practical application of automated monitoring and intelligent management in production through the integration of overall industry knowledge.
Six inspection methods of PCB circuit board short circuit
1. Open the PCB design drawing on the computer, light up the short-circuited network, and see where is the closest, the easiest to connect to. Pay special attention to the short circuit inside the IC.

2. If it is manual welding, develop a good habit:

1) Before soldering, check the PCB board visually, and use a multimeter to check whether the key circuits (especially the power supply and the ground) are short-circuited;

2) Every time a chip is soldered, use a multimeter to check whether the power supply and ground are short-circuited;

3) Don't throw the soldering iron randomly during soldering. If you throw the solder onto the solder feet of the chip (especially surface mount components), it will not be easy to find.

3. A short circuit is found. Take a board to cut the line (especially suitable for single/double-layer boards). After the line is cut, each part of the functional block is energized and eliminated step by step.

4. Use the short-circuit location analysis instrument

5. If there is a BGA chip, since all the solder joints are covered by the chip and cannot be seen, and it is a multi-layer board (above 4 layers), it is best to separate the power supply of each chip during the design, using magnetic beads or 0 ohms Resistor connection, so that when there is a short circuit between the power supply and the ground, the magnetic bead detection is disconnected, and it is easy to locate a certain chip. Because the welding of BGA is very difficult, if it is not automatically welded by the machine, a little carelessness will short-circuit the adjacent power supply and the ground two solder balls. 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.
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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.