d d maintenance supply

The actual motherboard maintenance, often beginners in the measurement of the motherboard of the various power supply voltage, easy to be measured in the actual results of the voltage deviation (whether normal), in this brief description, the general motherboard of the main power supply voltage range and common test points: As shown in the figure a

ahead of time. In the switching power supply on the output capacitor is a special requirement, is generally required to work at a temperature of 105 degrees, low ESR, high ripple resistance. To the market to buy 10 parameters to meet the requirements of the 2200uf/16v Taiwan Teapo Electrolytic Capacitor, a total of 5 yuan. For safety, replace all four output capacitors. Power supply After careful examinati

Internet cafes currently provide services, such as Web browsing, network games, online movies, distance education and other basic services are related to the network, the quality of the network directly determines the viability of Internet cafes. Therefore, how to plan a high-quality network environment, is an Internet café operators must consider a key point, the integrated wiring of Internet cafes accounted for a large number of factors, mainly two major parts: power wiring and network wiring.

First, the maintenance judgment must start from the simplest thing Simple things, on the one hand, refers to observation, on the other hand refers to the simple environment. The simple thing is observation, which includes: 1, the environment surrounding the computer-location, power supply, connection, other equipment, temperature and humidity, etc. 2, the phenomenon displayed by computer, the content of dis

A Power distribution System (PDS) is a subsystem that allocates power from power source to each device and device that needs power in the system. In all electrical systems there are power distribution systems, such as the lighting system for a building, an oscilloscope, a PCB, a package, a chip, and a power distribution system inside. Power distribution system on the PCBIn a typical product, the power distribution system consists of a voltage regulator module (VRM) to the PCB board, the

The working principle of the switch power supply in this paper is the analysis of the principle of the switch power supply engineers of Electronic enthusiasts. Based on the analysis of a wide range of switch power supply cases, this paper introduces the single-positive excited switch power supply and Self-excited switc

In the 1960s S, the advent of the switching power supply gradually replaced the linear regulated power supply and SCR phase-controlled power supply. Over the past 40 years, the switch power supply technology has developed and changed rapidly, and has gone through three stages of development: power semiconductor devices

power is:First, the UPS function, UPS power can be in the mains when the abnormal, effectively and stably purify the mains, so that the load equipment in a safe and stable power environment to operate; In addition, UPS power supply can also be a sudden interruption of the mains for a certain time to the load equipment to provide mains, To ensure the continuation of work or the preservation of completed work.Second, from the working principle of UPS,

　The cause analysis and solution of the power supply light of notebook computer is not bright/flashing continuously One, the power light is not bright First of all, The notebook power light is not lit, there are two situations: If the LEDs on the external power supply (adapter) on the laptop are not lit, the adapter may not be connected to the socket, or there is no power at the outlet, or the adapter ma

The joys of maintenance programming describes the fun of program maintenance: 1) Learn to debug-you'll learn how to debug 2) learn better programming-you'll learn how to program better 3) Learn to optimize-you'll learn how to optimize 4) Learn "new" technologies and tools-you'll learn new (to you) skills and tools 5) Learn to better use the database-you'll learn to value data and databases 6) it is easier

When you solve a user's PC fault, do not forget to use a multimeter to test the power supply. Learn some simple and easy-to-use skills to help you eliminate the possibility of power failure. It may not seem obvious, but more than 1/4 of PC problems are related to power problems to some extent. You may think that if there is a problem with the power supply, the PC will not start up at all, and the culprit w

Vi. Supply Chain monitoring and measurement The final value of supply chain integration can be achieved if all partners believe that they will be rewarded with their efforts. Moreover, they are likely not aware of their participation so that they are not competitive with other members or traditional competitors. The more complex and scattered the supply chain, th

When you buy a computer power supply, be sure to pay attention to the following six power supply parameters, which can choose a high-quality power is very helpful oh ~ One, the weight of the power supply Through the weight can often observe the power supply to meet the specifications, generally speaking: good power s

1-5. Single-excited transformer Switching Power SupplyThe biggest advantage of transformer switching power supply is that the transformer can output multiple sets of different values at the same time, which makes it easy to change the output voltage and output current, you only need to change the turns ratio of the transformer and the cross-sectional area of the enamelled wire. In addition, the transformer is isolated from each other at the beginning

Some electrical appliances contain coil components, which may lead to Eddy Current blocking during the initial power-on period. The generation of eddy current will weaken the transient voltage at the startup of the electrical appliance, resulting in slow start, the transient voltage generated after circuit breaking is enhanced, and the circuit may be damaged by sparks.In this case, add the Link Description for the Single-Phase Frequency Conversion Power Source in Hong Kong Yangsheng. Add the Lin

Application of Integrated PWM controller MB3759 in Switching Power Supply [Date:] Source: Power Technology Author: Ma Xinxia song mingzhong Qian cunjian Cai fangwei [Font:Large Medium Small] 　 O IntroductionAs an energy-efficient power supply, switching power supply represents the development direction of regulated power

As a computer's logistics support equipment, power sources have not been valued for a long time, but only need to be used. As the power consumption of the computer system continues to rise and the media and old gamers promote and promote power consumption, we gradually learn the importance of power supply and begin to face up to this indispensable accessory. However, due to the closeness of power supply pro

Offline Live detection Under normal circumstances, in standby state of ps-on and Pw-ok two power signals, one is high, the other is low level, plug 9 feet only output +5VSB voltage, as long as the meter to measure the voltage to the parameter value, you can determine the result of the problem. Artificial Wake power supply detection Use a thin wire (such as a paper clip, fine copper wire, wire or tweezers) to ps-on the 14 feet of the ATX plug (the o

48 V mains supply technology is the future direction of data centers (1) With the large-scale construction of data centers, users pay more attention to energy costs and efficiency. The future direction of the power supply technology of data centers must be the municipal direct power supply technology, while saving the investment and Site Occupation of traditiona

Real problems of Enterprises: for enterprises, balanced production and timely supply (providing products to customers in a timely manner, allowing suppliers to supply raw materials in a timely manner) are the basis for enterprises to obtain maximum economic benefits. However, in reality, many enterprises cannot achieve balanced production and timely supply. One o