An automatic test system for assembling circuit boards is also an on-line static test equipment for circuit boards, also known as ICT/ATE/ATS/MDA test in the industry! ICT(In-circuit Test System), commonly known In Chinese as online Circuit Test instrument (here refers to the assembly Circuit Test instrument), is mainly used for the assembly Circuit board (PCBA) [...]
Testing whether the IC is burned out or short circuit requires professional knowledge. Generally, people without such knowledge and skills can make some simple judgments by carefully observing the appearance of IC: whether the IC surface has burned marks, such as blobs, cracks, discoloration and so on. IC pin break, unsolder. Does IC have burnt [...]
What are the products that need PCB's in our life? The first is electronic products requiring integrated circuits: In order to save space, make the products lighter, more durable, and achieve good performance, these electronic products must eliminate the previous wire connection and switch to printed circuit boards. PCB meets the requirements of space, performance [...]
IPC-ESD-2020 Joint standard for electrostatic discharge control program development. Including the design, establishment, implementation and maintenance of esd control program. Based on the historical experience of some military and commercial organizations, this paper provides guidance for the treatment and protection of esd sensitive period. IPC-SA-61A After welding half water into the cleaning manual. Includes all [...]
X-ray can effectively detect the defects of PCB board such as solder, adhesion and copper foil falling off. Nikon technology in response to the needs of the majority of customers launched a large capacity high resolution high magnification of the new X-ray detection system. The excellent detection effect is applicable to BGA, CSP, flip chip [...]
The sampling harness is divided into several stages 1) At the beginning of the battery module, the measuring point of the pole column was extended to the connector through the wire, and then the connector was connected with LECU. The sampling wire harness is long, the connection points are many, and the overcurrent fuse mechanism [...]
Almost every electronic device we use today uses PCBs; just like everything else, the problems with PCBs also exist. Even the best-made PCBs will fail, not to mention those made using cheap raw materials and amateur practices. However, even good quality PCBs may face problems, and these problems must be identified and corrected immediately to [...]
Spacing between patches The spacing between patch components is a problem that engineers must pay attention to during layout. If the spacing is too small, it is very difficult to print solder paste and avoid soldering. The recommended distances are as follows: The distance requirements between the devices: Same device: ≥0.3mm Different devices: ≥0.13*h+0.3mm (h [...]
1 Capacitor failure Failures caused by capacitor damage are the highest among electronic devices, and damage to electrolytic capacitors is the most common. Capacitor damage is manifested as: the capacity becomes smaller, the capacity is completely lost, the leakage, and the short circuit. Capacitors play different roles in circuits, and the faults caused by them [...]
What is the significance of impedance to PCB circuit board, why is PCB circuit board impedance? This article first introduces what impedance and impedance types are, and then introduces why PCB circuit boards need impedance Finally, the meaning of impedance for PCB circuit boards is explained, and I will learn more about it with Xiaojie. [...]