computer not turning on power supply works

... to computer devices. Step 1 The first step in the assembly process is to create an inventory of all computer components that will be installed into the computer. Lay out the computer components ... factor of the unit, and the voltage selector switch on the power supply. The inventory of all the components that will be installed in the computer case will also be discussed. Finally, motherboard ... _______________ USB Keyboard Connector _______ 5-pin DIN or ________ 6-pin mini DIN _______ USB (Make sure it matches the connector on the Motherboard). Power Supply AT __________ ATX...

Ngày tải lên: 21/12/2013, 19:15

... operation, the rectifier provides power 0278-0046/$25.00 â 2008 IEEE 3002 IEEE TRANSACTIONS ON INDUSTRIAL ELECTRONICS, VOL. 55, NO. 8, AUGUST 2008 Fig. 9. Simulation results. (a) Traditional UPS ... transfer function is W ou (s)=W u (s)W ci (s) 1 sC s (20) where W u (s) is the transfer function of the outer loop controller. The proportional–integral (PI) controller is adopted to con- trol the ... high efficiency, low harmonics, fast response, and good steady-state performance in comparison with traditional UPSs. The simulation and experimental results of a 3-kW UPS with the new topology confirm its validity. Index...

Ngày tải lên: 03/01/2014, 19:12

Ngày tải lên: 13/05/2014, 00:55

... công suất trực tuyến để tìm ra con số cần thiết ví dụ như: - http://www.jscustompcs.com /power_ supply/ - http://www.mymp3car.com/MP3Car/PSUpower.asp Trong thực thế, Khi đem một hệ thống ... công suất khoảng 430w vào bộ nguồn có chỉ số Continuous Power là 400w, chúng vẫn có thể hoạt động được trong khoảng thời gian ngắn nếu mức Peak Power của nguồn đạt trên 430w nhưng sau một ... EPS 12V 8 chân: Thường được sử dụng cho các bo mạch chủ workstation trên những hệ thống máy tính chuyên nghiệp với CPU Opteron hay Xeon. Gần đây, một số loại bo mạch chủ Desktop mới cũng bắt...

Ngày tải lên: 01/11/2012, 16:38

... Cách Test đơn giãn là dùng một điện trở tải (điện trở sứ trong các monitor CRT hay tivi) chừng vài chục ôm và vài chục W. Kẹp song song với que đo đồng hồ khi đo. - Nếu mức sụt áp <= 5% là ... cắm EPS 12V 8 chân: Thường được sử dụng cho các bo mạch chủ workstation trên những hệ thống máy tính chuyên nghiệp với CPU Opteron hay Xeon. Gần đây, một số loại bo mạch chủ Desktop mới cũng bắt Bộ ... vhoạt động v cung cp ngun cho ti. ã ON LINE: Inverter luụn hoạt động (on) cung cấp điện cho tải. UPS thông minh ã c iu khin bi phn mm qua cng USB hoc cng song song. ã Cho phộp chn oỏn UPS Cho...

Ngày tải lên: 27/04/2013, 11:36

Ngày tải lên: 15/10/2013, 16:11

... D/A converters or power control devices. The A/D Converter of ST52x420 is an 8-bit analog to digital converter with up to 8 analog inputs offering 8-bit resolution and a typical conversion time ... system parameters. Digital Control of Switching Power Supply - Power Factor Correction Stage Sangsun Kim and Dr. P. Enjeti Power Electronics and Power Quality Laboratory Department ... additional PFC boost converter in the system is A conventional SMPS employs a diode rectifier for ac to dc conversion. This type of utility interface generates harmonics and the input power...

Ngày tải lên: 27/10/2013, 16:15

... R s constant. Since the voltage drop across R s is constant V stays constant H. Chan; Mohawk College 11 constant, V o stays constant. Comparison of Different Types of RectifiersComparison of ... dropout, higher in/output, and better regulation are available. Equations for Buck RegulatorEquations for Buck Regulator ttV T t tt t V V on offon on i o = + = Sl i I 04I hISelecting I L = 0.4I o where ... flow through C and D. Basic PushBasic Push Pull Power ConverterPull Power Converter Operates as a class D power amplifier. Output rectifier converts the sq are a e to dc Each transistor m st...

Ngày tải lên: 13/12/2013, 23:15

... Electrical power supply architecture 2.4 Power supply functions 2. Electrical power supply 6 2.4 Power supply functions There are three separate functions: b Supply and cut off the machine power ... Electrical power supply 7 b Power unit supply The table (C Fig. 5) summarises the power units and functions covering the requisite functions. 2.5 Power supply to the control circuit The power supply ... Electrical power supply 3 1 2 3 4 5 6 7 8 9 10 11 12 M 2.1 Introduction Page 2.2 Power supply to machinery Page 2.3 Standards and conventions Page 2.4 Power supply functions Page 2.5 Power supply...

Ngày tải lên: 15/02/2014, 08:33

... surviving CFU Trappin-2/activated conidia Trappin-2 A62D/M63L/activated conidia Trappin-2/nonactivated conidia Trappin-2 A62D/M63L /nonactivated conidia Elafin/activated conidia Fig. 4. Antifungal activity ... whereas dormant conidia were not killed (Fig. 4). The maxi- mum fungicidal effect was approximately 60% with the protein concentrations tested and was reached at a 15 lm concentration of trappin-2. Figure ... added in the incubation mixture (10 )7 M final) to evaluate their effect on fibronectin degradation by A. fumigatus protease(s). Fibronectin breakdown products were separated on a 10% SDS ⁄ PAGE...

Ngày tải lên: 18/02/2014, 17:20

... because of consuming a lot of reactive power. Therefore, not only the compensation devices should be installed on the primary side but also on the the secondary side. Commonly, compensation level ... valves. 3. Conclusion The application of power electronic components for controlling in the above mentioned cases brings certain benefits. Comparing with the manual switching method or contactors ... The controlling of compensation devices could be implemented by power electronics structures controlling the firing angle of thyristor. In the next section, we introduce a power electronic...

Ngày tải lên: 05/03/2014, 14:20

... Page MD, Sambongi Y & Ferguson SJ (1998) Contrast- ing routes of c-type cytochrome assembly in mitochon- dria, chloroplast and bacteria. Trends Biochem Sci 23, 103–108. 6 Sambongi Y, Uchiyama ... Haseg- awa J, Uchiyama S, Nishihara H, Mizuta K & Sam- bongi Y (2005) Cloning, expression, crystallization and preliminary X-ray characterization of cytochrome c 552 from a moderate thermophilic ... cannot synthesise an exogenous monohaem c-type cytochrome except in the presence of disulphide com- pounds. FEBS Lett 398, 265–268. 31 Sambongi Y, Stoll R & Ferguson SJ (1996) Alteration of...

Ngày tải lên: 06/03/2014, 00:20

... information in some occasions and some of the presentations needed thorough discussions on its own!  Workshop definitely timely and very, very informative! Excellent information.  I wish to personally ... organization, data delivered during the workshop. Note: regards and thanks also to Julie Burton for pre-workshop organization.  Future workshop of this kind should probably include information and ... Fiji), but do not have the power to implement decisions. Can the legislation or management plan stipulate the powers of some committees? Another matter often not detailed in legislation is the...

Ngày tải lên: 14/03/2014, 10:12

... component) and the supply voltage. There is a simple right angle triangle relation between active power, reactive power and apparent power. But, this definition of the reactive power is not ... and malfunction in communication system. The degree of variation is assessed at the point of common connection, where consumer and supplier area of responsibility meet. The harmonics voltage ... induction generator is directly connected to grid. Harmonic measurements are required only for variable speed turbines equipped with electronic power converters. In general the power converters...

Ngày tải lên: 17/03/2014, 02:20

... PCIE connectors can also be powered using 2 molex connectors if one isn’t available from the PSU itself, and molex to SATA power connectors are also quite common. SATA - This connector is ... take only Modular Power Supplies Modular power supplies, on the other hand, have detachable power connectors. This has the added benefit that you can have exactly the connectors you need, and nothing ... the more efficient the power supply is the less AC power it requires to provide sufficient DC power, meaning lower overall power consumption from the mains and a smaller power bill. The earth...

Ngày tải lên: 19/03/2014, 20:35

... and malfunction in communication system. The degree of variation is assessed at the point of common connection, where consumer and supplier area of responsibility meet. The harmonics voltage ... induction generator is directly connected to grid. Harmonic measurements are required only for variable speed turbines equipped with electronic power converters. In general the power converters ... been done on the control of active filters. Contents Preface VII Section 1 Power Quality Issues and Standards in the Electricity Networks 1 Chapter 1 Harmonics Generation, Propagation...

Ngày tải lên: 23/03/2014, 15:20

Ngày tải lên: 23/03/2014, 16:20

Ngày tải lên: 10/04/2014, 19:55

Ngày tải lên: 18/04/2014, 12:25