As a power conversion device, Switching Power Supply can be seen everywhere in life, and most people rarely know its basic common sense and function. A switching Power Supply is a small portable power conversion device, which generally consists of a casing, a switch, a power transformer and a rectified current. It can be divided into AC output type and DC output type. Generally, there are two types: wall-plug type and desktop type. In the use of switching power supply, it is inevitable that some faults will occur over time. So what are the common faults of switching power supply and how to solve them? In the use of switching power supply, faults such as blown fuse, unstable voltage output, no DC voltage output, and reduced power load capacity often occur. After a problem occurs, there will be some manifestations, which can help users find the reason for the user and do a good job Maintenance or even replacement. The blown fuse is a common problem. The biggest reason for this problem occurs when the components and open-circuit power supply are damaged. In the case of a blown fuse in the product, do not allow the maintenance personnel to change the fuse casually, and then turn it on immediately. The reason for the fuse is that blind booting is likely to cause a secondary fuse. If the power supply used in the computer is frequently powered off, if the hard disk tells to write, it will easily cause damage to the hard disk, which is not worth the loss. . The damage of the fuse is generally caused by a problem with the components, and the fundamental problem can be solved to avoid this situation from happening again. Poor load capacity generally occurs in power supplies that work for a long time. The aging phenomenon of long-term use is also the biggest cause of this situation. During use, because part of the heat inside the power supply cannot be dissipated, the replacement of the power supply is also With a certain frequency, it is normal for various components to age during use, and unstable work occurs at such times. Therefore, in daily use, if the heat dissipation problem is better solved, the service life can be effectively used. prolonged. When the load capacity of the switching power supply is poor, it is often caused by the leakage of the diode, and its damage cannot be ruled out, and capacitor damage also often occurs.
Voltage output does not Wendy problems occur also quite often. Generally, when the maintenance personnel detect the fault, they will first check whether the fuse is in good condition. If the fuse is in good condition, there is still voltage instability, which proves that there is a short circuit in the circuit, and it may also be caused by overvoltage. When using a multimeter to detect, it will also be found that the diode and breakdown, and the short circuit is often caused by it.
The above three problems occur frequently. As a novice user, when using home appliances, they often cannot find such problems. Therefore, regular maintenance of the equipment is extremely important. The fuse is blown, the load capacity is poor, and the voltage output Instability will always manifest itself, as long as it is carefully observed in daily use, it can be successfully resolved.
In fact, a variety of failures occur, and another major reason is that the power supply equipment is not matched with household equipment. During use, the power supply burns out due to power and voltage problems. Years of work experience remind users that when purchasing computers and other assembled products When it is time to do it, it must be carried out under the guidance of professionals to avoid the danger of incompatibility, that is, without saving money, it may cost more.
APM originated in 1989 and established its own brand in 2012. It is a high-tech enterprise integrating independent research and development, production, sales and service. With the test source/load as the core product, we provide a full range of comprehensive solutions and services. Products are widely used in aerospace, new energy, power electronics, intelligent manufacturing, scientific research and education and other related fields. Marketing the world with its own brand "APM", always adhering to the business philosophy of "professional, innovative, brand, and service", providing customers with higher added value and services, focusing on the field of testing, and committed to becoming a world-class power electronics Test solution provider serving customers worldwide.
