The common drilling holes in PCB are through hole(VIA), blind hole and embedded hole. What’s the meaning and characteristics of these three kinds of holes? Via(Through Hole) What is Via? Via is a common hole and used to direct or connect copper foil lines between conductive patterns in different layers of the circuit board. Because PCB is formed by many copper …
The reduction of the number of PCB layers can greatly save the cost, the price difference is very wide. It can almost be said that the cost of every two additional layers of PCB will double. That is to say, the cost of four layer PCB is twice that of two layer PCB, and the …
What’s Printed Circuit Board? Printed circuit board is also known as PCB and is the provider of electrical connection of electronic components. It has a history of more than 100 years. Its design is mainly layout design. The main advantage of using circuit board is greatly reducing wiring and assembly errors, improving the level of …
What’s The Difference Between Printed Circuit Board and Integrated Circuit Board? Read More »
Printed Circuit Board Faults 1. Poor Contact Poor contact between board and slot, broken cable, poor contact between wire plug and terminal, false soldering of components and so on all belong to this category. The solution to this kind of fault is to carefully check the suspected connector to see if there is obvious oxidation …
Analysis of Common Faults of Printed Circuit Board Read More »
Understand the composition and classification of printed circuit board, learn more and find information. Composition The circuit board is mainly composed of pads, vias, mounting holes, wires, components, connectors, fillers, electrical boundaries, etc. the main functions of each component are as follows: Pad: A metal hole used to weld pins of components. Vias: There are …
How to Inspect Short Circuit of PCB Board ? If it is manual welding, we should develop good habits Before welding, the PCB board shall be inspected visually and the key circuits (especially power supply and ground) shall be checked for short circuit with multimeter. After welding a chip, use a multimeter to test whether …
How to Inspect Short Circuit of PCB Board and Judge it? Read More »
Before Cleaning All connectors on the circuit board including jumper plug, card board, battery and IC must be carefully pulled out before cleaning. Potentiometer, transformer and solenoid coil (inductive coil) must also be removed from the circuit board. Note: non electronic professional do not do this operation, because if there is no electronic professional technology, …
Fault Characteristics and Maintenance of PCB Capacitor Damage The fault caused by capacitor damage is the highest in electronic equipment, especially the damage of electrolytic capacitor is the most common. The damage of capacitance is shown as follows: the capacity becomes smaller, total loss of capacity, electric leakage and short circuit. Capacitors play different roles …
We will discuss the contents of “grounding” in PCB layout of boost DC / DC converter. It is often heard that “grounding is very important” and “grounding design needs to be strengthened”. In fact, in the PCB layout of boost DC / DC converter, the grounding design which does not fully consider the grounding and …
Because most of the modern printed circuit boards have no official schematic and more and more chip applications with programs, engineers will face challenges in various aspects. Through a lot of practice, there are still ways to avoid these challenges. I will share 6 maintenance methods of PCB. Tip 1: Appearance Inspection Looking, asking, smelling …
