PCB board common problem detection and solution
Making a PCB board is not a simple process to complete the board, just drill a hole and put the components on it. PCB production is not difficult, the difficulty lies in the troubleshooting after the completion of the production. Whether it is an individual enthusiast or an industry engineer, it is quite a headache for the PCB board to encounter problems during debugging, just like a programmer encounters a BUG. Some people have a strong interest in debugging PCB boards. Just like programmers are solving BUGs, there are many common PCB board problems. Common problems include board design, electronic component damage, line short circuit, and components. The quality and PCB board breakage are not a few. Damaged diode ring resistor Common PCB circuit board failures are mainly concentrated on components, such as capacitors, resistors, inductors, diodes, transistors, FETs, etc., the integrated chip and the crystal oscillator are obviously damaged, and the method of judging the fault of these components can be passed. Eyes to observe. The surface of electronic components with obvious damage has obvious burning marks. Like this type of failure, you can solve the problem by directly replacing the problem component with a new one. Suspected damage to components? In fact, this component is not damaged. Of course, not all electronic components can be visually observed, such as resistors, capacitors, and triodes. In some cases, damage cannot be seen from the surface and requires professional inspection tools. Commonly used inspections include: multimeters, capacitors, etc., when it is detected that the voltage or current of an electronic component is not within the normal range, indicating that there is a problem with the component or the previous component, and directly replace it and check to see if it is normal. Board without any damage and no failure to detect If the component is broken, it can be detected whether it is observed by the eye or by the instrument. However, sometimes when we give the components on the PCB, we will not detect the problem, but the board will not work properly. Case. Many newcomers have no problem with this kind of problem. They can only re-do a board or buy one. In fact, in this case, many times the components are in the process of installation, due to the coordination of various components, there may be performance instability. Circuit board loop division In this case, the instrument can no longer help, you can try to judge the possible range of the fault according to the current and voltage, try to narrow down, experienced engineers may be able to quickly determine the fault area, but the specific components are broken. But not 100% certain. The only way is to try to replace the suspect component until the problem component is found. Last year, my notebook motherboard was flooded. When I was repairing the master, I also encountered the failure to detect the fault, and replaced the components three times during the repair process, namely the power supply chip, the diode, and the USB charging component. The socket can charge the device when it is turned off. Finally, it is determined by a wave detection and replacement of the suspect chip, and finally it is determined that a component on the side of the south bridge chip is short-circuited. Circuit board flying line The above mentioned are actually the problem of electronic components. Of course, since the PCB circuit board is the foothold of the components, the circuit board fault must exist. The simplest example is to die the tin-plated part, due to the manufacturing process, There is a possibility of wire breakage during PCB corrosion. In this case, if you can't make up the line, you can only solve it with a thin copper wire. PS: PCB circuit board failure is not very obvious, it is very troublesome to check, and in the process of investigation, there will be a concentration of focus, after finding the problem, there will be an inexplicable sense of accomplishment, the programmer solves the bug. That's the mood. M12 Connection Cable provides a wide range of metric for small Sensors and actuators. The connector system provides a future-proof interface that supports higher-bandwidth needs, meeting the requirements of up to 10GB/s. Connectors are either factory TPU over-molded or panel receptacles supplied with sold-cup for wire connecting or with PCB panel solder contacts. Field attachable / mountable Connector is also available for your choice. M12 connection cable,M12 3 pin connection cable,M12 4 pin connection cable,M12 5 pin connector cable,M12 8 pin connector cable Kunshan SVL Electric Co.,Ltd , https://www.svlelectric.com
