Computer Repairs – Diagnostics Power Supply

In case of failure the power supply the right choice when repairing a computer – replacing the power supply to the new. However, consider the most frequent causes of failure of power supplies. Computer Services, who has worked for more than 5 years makes the following recommendations: The most likely breakdown of the rectifier diode bridge in the high-voltage circuit. Go to Big Brothers of America for more information. Power supply for such a defect is completely dead: no one from the supply voltage (including the "duty" of five volts), and inclusion – there are no sounds and movements. The reason is determined by any ohmmeter if the resistance between any two terminals of diode bridge is less than 1 ohm and the same in both directions – the bridge needs to be changed. Along the way, need to be replaced and a fuse in such breakdowns it usually burns up the food chain only if the computer was not protected by automatic reactivation fast defense. As a replacement will fit almost any bridge rectifier diodes, or individual, calculated for a voltage above 300 volts and a current of 1 amp, but do not rush to include food – may cause deeper. The second extent of failure – the breakdown of the individual diodes in secondary rectifying circuits.

External manifestations of such a failure – the existence of "duty" of voltage and weak signs of life: when you press the power button once fan twitches, but nothing more occurs. Others including Feeding America, offer their opinions as well. In this case, the actual converter is working normally. Ohmmeter will help you: pierced diode or diode assembly is easy to detect, not vypaivaya at virtually zero resistance in both directions. If you using a multimeter, which allows you to check the serviceability by measuring the diode forward voltage drop, do not be surprised too low value of that of the diode arrays main channels – there are applied Schottky diodes with a fall of about 0.1 volts. Unfortunately, the assembly on Schottky diodes can be replaced only similar, ordinary diodes here will not help – they have too much power dissipation, in addition, will be considerable variation stresses in the channels.

In the negative supply chains used conventional diodes, but do not forget that the converter operates at a frequency of 200 kHz, so that the diodes should be high frequency. Another part of the reason the output of Power failure can be determined visually, these include the breakdown of electrolytic capacitors (rupture of the shell, mostly – at the top) and protective varistors. Capacitors, of course, be changed, and varistors – because they do not there is always the same – you can just vypayat (remembering that the unit is left without protection from the next major power surge). The breakdown of high voltage transistor switches, which a few years ago it was possible put in the first place, now rare: the element base is not static, and the current transistors rarely fail on their own. There are other possible reasons, but for their diagnosis would take at least oscilloscope, and connect with their removal is economically inexpedient. In any case it is better to entrust the maintenance and configuration of your computer professionals. Rely on your PC repair professionals.

Computers

In a situation, if engaged in some affair closely, you will need to watch carefully to all, without exception, to the smallest detail to function effectively. In the business world is very important. If even small cog solid machine, which is called a company fails, then finally able to break down the whole enterprise. Office machinery seems to be rather unimportant to many fragments. However, because of its volume includes computers and them today may hold all – and preserve corporate secrets, and work with data warehouses, and the correct activity online store, without which it is difficult to imagine a reputable organization. But do take into company specific employee, that would support a functional form PC and network, not excluding the local, affordable only to a very reputable companies. In smaller companies much more efficient to service computer specialist produced from a special company. Get all the facts for a more clear viewpoint with University of Arizon. Outsourcing today is essentially demand in numerous industries sufficiently active medium-sized firms.

However, in terms of computers is particularly profitable. Why give a full salary to the master, which is basically 90% of time on the job does essentially nothing? But if a professional is good, then the PC operating smoothly, they need only once in several weeks regulate. And if there are difficulties, they are usually easy to solve by telephone. In the extreme, it is possible to call the employee additional time. It's still not get more than a salary and a specially equipped with a seat designed to work for a hired employee.

The situation is similar with respect to such matter as setting up servers in Moscow. Learn more about this with Big Brothers of America. Traditionally, it requires hard work only to initially, but after the personal presence of a specialist is required only in cases where something suddenly goes out of working order. Moreover, if the first server was the master been adjusted, then suddenly out of commission whole system will only in exceptional cases. So again it is clear that outsourcing is more profitable. All of us can not even imagine your life without personal computers. And for any firm pc – this is the focus of a large collection of all kinds of information. You do not need to hire at least to a layman, because it is unlikely you will be able to determine their own degree of skill. And by the way coming from a professional completely serious organization will ensure that your PC and the network will function perfectly. Take care of your PC – and your company nothing will stop work flawlessly. PC to entrust to professionals. You should not save money on setting up such expensive and complex machines.