What is BP in the computer and how to fix its problems?

Knowledge Base Hits: 176

A large number of people uses the computer, without thinking of what it consists of as works and so on. It is worth understanding that such BP in the computer as it is an important part of the general chain on which its opportunities depend. There are features of the choice which should be known and considered.

What is BP?

Reduction of BP designates the power supply which is the device intended for transformation of mains alternating voltage to constant and transfers to its components of the computer. Still it protects the equipment from differences of tension. The power supply as a box of the small size with the fan looks. It is important to know how to use BP from the computer it is correct as according to researches the majority of breakages are connected with this element of a system.

Principle of work of BP of the computer

Transformation of tension happens in several stages:

The filter of the main tension is responsible for peaks of tension, harmonica and for hindrances possible in network.
At the next stage the alternating current becomes straight and stabilized. Tension in 350 V via the inverter turns into variable and has the frequency of 35-50 kHz.
The BP device of the computer can have one output winding with branches for tension with different number of rounds or separate windings for each tension (3.3, 5 and 12 V). Expensive power supplies have separate transformers for different operating tension.
It is important that the specified tension had a constant. For this purpose in the device the existence of a special contour of adjustment is intended.

How to pick up the power supply for the computer?

In shops a wide choice of similar devices is presented that causes difficulties upon purchase. It is necessary to know how to choose the power supply for the computer, and it is necessary to pay attention to the following nuances:

Give preference to reliable producers, for example, many consumers trust such brands: Chieftec, Cooler Master, Hiper.
Consider, choosing the block of uninterrupted food for the computer that the more current indicators, the better. Powerful BP matter 50 A and above.
The indicator of PFC can be active and passive. The first option is is more better and makes 95%.
Continuing to describe that such BP in the desktop computer and what it is worth paying attention when choosing to, It is necessary to tell about need of presence of a sticker 80 PLUS as she confirms high efficiency.
Pay attention to existence of protection against retension, overloads and KZ.

Calculation of power of BP of the computer

To learn values of power, it is possible to go in several ways. For example, it is possible to ask selling assistants, but there is no confidence in 100% of truthfulness of information. If there is no desire something to consider, and financial opportunities allow, then it is possible to buy the 600-1000 W BP. Calculation of the power supply for the computer can be conducted independently for what at first it is necessary to determine necessary power for each component, and then to receive total value.

Consider that the total power of accessories has to be below the maximum output power. Besides, do not forget that in characteristics the maximum is specified, and in operating time the power is consumed differently. Finding out that such BP in the computer and as it is correct to calculate its power, it is worth specifying that there are special programs and even online calculators for calculation. One of the most clear is the following resource – outervision.com.

How to start the power supply without computer?

There are situations when the personal computer and for definition of the reason breaks, it is better to carry out the assessment of serviceability of separate links of a chain. An inspection of the power supply of the computer can be carried out without motherboard. Process simple and for it is required a small wire or a paper clip. In modern computers the ATH standard and for it is used there are two types of sockets on 20 and 24 contacts on the plug. There is a simple instruction how to start BP without computer:

Take the power supply, having disconnected all wires. Consider that 20 contact BP are sensitive, and they cannot be started without loading therefore it is necessary to connect the unnecessary fan or a usual garland.
Study the scheme of contacts and compare it to the available plug. It is necessary to close such contacts: PS_ON and COM. Them a little therefore it is possible to choose the most convenient for himself. Use a short wire with the bared ends or an office paper clip.
Turn on the power supply and if it is serviceable, then the bulb will light up or the fan will rustle.

Malfunctions of BP of the computer

As the power supply includes many elements which can fail for various reasons, the list of possible problems extensive. It is important to know how to check the computer power supply for serviceability and simple methods will be given below. Carry to standard malfunctions: the cooler does not rotate, the safety lock fuses, there is no output voltage, protection against an overload and so on works.

After replacement of BP the computer does not turn on

There are several reasons because of which the power supply can not turn on:

There is no tension. Turn on other device in the socket to check tension. Besides, it is worth paying attention to the number of the connected devices via the extender as protection can work. One more moment – on the BP some models is the switch of 220-127 V, establish it in the necessary situation.
If computer BP does not join, then perhaps something broke. It is recommended to carry out the test: on the main socket the bent paper clip or a wire close the 14 and 16 contact. After this BP has to earn and if noise of a cooler is not heard, then it should be replaced.
The battery does not work at a materinka. It is possible to check serviceability a tester or at once establish new and check work of BP.
If the computer power supply is not started, then the reason can be in malfunction of components or sockets, buttons of food or the motherboard.

Computer BP is heated

That the power supply overheats, such signs will demonstrate: the overestimated indicators of sensors, the slowed-down work of OS, the computer independently it is restarted and coolers a long time quickly turn. There are two ways how to learn computer BP temperature: use of special applications or through BIOS. Carry to the main reasons for overheating which need to be checked and excluded as necessary: