Replacing the ATX Power Block Usually required in two cases: 1 - if the existing for any reason has failed; 2 - You have installed new equipment into your system, for example a pair of game video cards, and the old block by 400 W can no longer provide nutrition of all devices due to insufficient output power. how replace ATH power supply You yourself will learn from the given instructions. From the tools you will need only a crosswinter. If such suddenly did not find it, then it will come up and "flat".

We will assume that you have already purchased a new BP and are ready to produce replacement. First, de-energize the computer - pull the electric cord (220 V) from power supply. Next, remove the left (usually the left, if you look at the computer in front) the wall of the system unit, unscrewing a pair of screws from the back of the case. The next case can be horrified by the number of accumulated dust and neatly vacuum cleaner remove it. About the site already has some information. If all the ventilation holes have a filter from dust and inside the PC everything is clean (or you have already cleaned everything), then you can move on.

Modern power supply ATX It has many conclusions for supplying electrical energy of all components of the system unit: motherboard with processor and memory, video cards, hard disks, etc. In general, all the wires that go from PSU (Power Supply Unit \u003d Power Supply) must be disconnected from the connected devices. In no case cannot be "shaking" tightly sitting connectors Perpendicular to the plane of the placement of contacts in them. The fact that it is necessary to keep the plugs for themselves, and not for the wire, I think you have learned you in my childhood.

Some connections (on the motherboard, the video adapter with additional power) have special stallsthat do not give the connection to disconnect from vibrations. To disable such "cunning" connectors - it is necessary press on the free end of the latch so that the tap came out from under the opposite part and it was possible to turn off the wire power supply ATX. The photo shows 20 + 4 "ATX POWER" connector and encourages the press for retrieving the plug.

After all the wires are disconnected, - to remove the old BP, it remains only to unscrew the 4 screws, which it is attached to the rear wall of the system unit. Take care to power Supply After unscrewing the last screw did not fall down (when it is uploaded) - hold it with your hand or turn the systemist properly.

On this, in general, and that's it. To install a new ATX power supply, Perform the removal operations in the reverse order: Insert a new unit into the housing and screw it with 4 screws. If the holes do not match the new BP and the PC housing, then simply turn the new BP - the holes on all ATX models of the format should be located in accordance with the Single Standard. After that, connect the power mat fee (ATX_POWER connector and additional power 12 V), hard disks and video cards. Personally, I usually perform their connection specifically in this order to avoid the need to climb the wiring card itself through the timing of the wires from the graphics adapter and HDD or and the optical drives drives.

In the event that you decided to install a new, more powerful power supply to your computer, then do not rush to part with the old one. It can be applied, for example, to power the LED lamps. As we have already considered in one of the most popular on the site of articles. There is also a complete pinout of ATX connectors. Valid currents on different power lines, see the sticker on the BP itself or in the documentation for it.

One of the important components of the modern personal computer is the power supply (BP). In the absence of power, the computer will not work.

On the other hand, if the power supply will produce a voltage coming beyond the limits of permissible, it can cause failure of important and expensive components.

ATX Computer Power Supply Scheme

In such a block, using the inverter, there is a conversion of a straightened network voltage into a high frequency variable, from which low voltage flows required for the computer are generated.

The ATH diagram of the power supply consists of 2 nodes - rectifier of the network voltage and voltage converter for the computer. The network rectifier is a bridge circuit with a capacitive filter. At the output of the device, a constant voltage is formed from 260 to 340 V.

The main elements in the voltage converter are:

• inverter transforming constant voltage into variable;
• high-frequency transformer operating at 60 kHz;
• low-voltage rectifiers with filters;
• control device.

In addition, the converter includes a duty voltage power supply, key transistor control signal amplifiers, protection and stabilization schemes, as well as other elements.

The inverter includes two power transistors operating in key mode and controlled by signals with a frequency of 60 kHz coming from the control circuit implemented on the TL494 chip.

A pulse transformer is used as a load of the inverter, which are removed, straighten up and filtered out the voltages +3.3 V, +5 V, +12 V, -5 B, -12 V.

The main causes of faults

The causes of faults in the power supply can be:

• throw and fluctuations in power supply networks;
• poor-quality production of the product;
• overheating, associated with poor fan operation.

Faults usually lead to the fact that the computer system block stops running or after a short work turns off. In other cases, despite the work of other blocks, the motherboard does not start.

Before starting repairs, you must finally make sure that the power supply is faulty. At the same time, you must first check the performance of the network cable and the mains switch. Making sure that you can disconnect the cables and remove the power supply unit from the system unit housing.

Before re-autonomously turn on the BP, it is necessary to connect the load to it. This will require resistors that are connected to the appropriate conclusions.

At the same time, the amount of resistance of the load resistors should be chosen so that the circuits of which the values \u200b\u200bof which corresponded to nominal indicators were told.

The dispersion capacity of the resistors must correspond to the rated voltages and currents.

Initially, it is necessary to check the effect of the motherboard. To do this, close two contacts on the power supply connector. On the 20-pin connector, this will be pin 14 (the wire for which the POWER ON signal fits) and contact 15 (wire corresponding to the output of GND - Earth). For a 24-pin connector - this will be the contacts 16 and 17, respectively.

The health of the BP can be assessed by the rotation of its fan. If the fan rotates - the power supply is fed.

Next, you need to check the compliance of the voltage on the block connector to their nominal values. It should be borne in mind that in accordance with the documentation on the ATX power supply unit, the deviation of the voltage values \u200b\u200bfor the power supply chain is allowed within ± 10%, and for the remaining power circuits ± 5%. In case of non-fulfillment of these conditions, it is necessary to proceed to repair the power supply.

Repair of computer power supply ATX

After removing the cover from the power supply, it is necessary to clean all the dust from it immediately with a vacuum cleaner. It is because of dust often beaten radioetal, since dust, covering the part with a thick layer, causes overheating of such parts.

The next step of determining faults is a thorough inspection of all elements. Special attention must be paid to electrolytic capacitors. The cause of their breakdown can be a heavy temperature regime. Faulty capacitors usually swell, and the electrolyte flows out of them.

Such details must be replaced with new ones with the same ratings and operating stresses. Sometimes the appearance of the capacitor does not indicate its malfunction. If there is a suspicion of poor work on indirect features, then you can check the condenser with a multimeter. But for this it must be dropped from the scheme.

The deterioration of the thermal regime inside the block may be associated with the poor work of the cooler. To improve work, it should be cleaned of dust and lubricate the bearings with machine oil.

Power supply fault may also be associated with low-voltage diodes malfunction. To check, it is necessary to measure the resistance of direct and reverse transitions of elements using a multimeter. To replace faulty diodes, you need to use the same Schottky diodes.

The following fault that can be determined visually is the formation of annular cracks that violate contacts. To detect such defects, you need to very carefully view the printed circuit board. To eliminate such defects, it is necessary to use a thorough soldering of cracked places (for this you need to know how to solder a soldering iron).

In the same way, resistors, fuse, inductors, transformers are inspected.

In the event that the fuse blocked, it can be replaced with another or fix it. In the power supply, a special element has conclusions for soldering. To repair a faulty fuse, it is dropped from the scheme. Then heated metal cups and remove them from a glass tube. Then choose the wire of the desired diameter.

The wire diameter required for this current can be found on tables. For an ATX fuse power supply unit for 5a, the diameter of the wire from the copper will be 0.175 mm. Then the wire is inserted into the holes of the fuse cups and is fixed with soldering. Renovated fuse can be soldered into the circuit.

Above the most simple malfunctions of a computer power supply unit are considered.

To detect and repair more complex breakdowns, good technical preparation and more complex measuring instruments, for example, oscilloscope.

In addition, the elements that need to be replaced are often a deficit and are quite expensive. Therefore, with a complex malfunction, it is always necessary to compare the cost of repair and the cost of purchasing a new power supply. It often happens so much more profitable to purchase a new one.

1. One of the most important elements of the PC is the power supply, when the system fails, the computer stops working.
2. The computer power supply is a rather complicated device, but in some cases it can be repaired with your own hands.

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How to independently repair the computer power supply?

Self performing the repair of a computer power supply - the case is quite complicated. Having been following this, you should clearly understand which component requires repair. Also, it should be understood that if the device is under warranty, then after any intervention, the warranty card is immediately burning.

If the user has small electrical appliance skills and is sure that it does not make mistakes, then you can safely take into such a job. We should remember the caution of working with an electrical appliance.

Computer BP scheme

To create a galvanic junction, a transformer is required with a large amount of winding. Based on this, the computer requires very high power and naturally, such a transformer for the PC should be overall and with considerable weight.

But due to the frequency of the current, which is required to create a magnetic field, requires a much smaller number of turns on the transformer. Due to this, when using the converter, small and light power supplies are created.

The power supply is at first glance a rather difficult device, but if it happens not a particularly serious breakage, it is quite realistic to repair it yourself.

Below is a standard BP scheme. As you can see anything complicated, the main thing is to perform everything alternately so that there is no confusion:

Required repair tools

In order to proceed with independent repair of BP, you should have the necessary tools at hand.

Before you need to arm the instruments for diagnosing a computer:

• working BP;
• pOST card;
• plank memory in working condition;
• compatible type video card;
• cPU;
• multimeter;

For the very best repair, you will need:

• soldering iron and everything for soldering;
• dumping;
• computer in working condition;
• oscilloscope;
• tweezers;
• insulating tape;
• passatia;

Naturally, for perfect repair it is not so much, but this is enough for home repair.

Step-by-step instruction

So, armed with all the necessary tools, you can start repairing:

1. First of all, you need to turn off the system unit from the network and give it a little cool.
2. Alternately unscrew all 4 screws that fix the back of the computer.
3. The same operation is carried out for lateral surfaces. This work is done carefully, in order not to hurt the wires of the block. If there are screws that are hidden under the stickers they also need to unscrew.
4. After the body is completely removed, the BP will have to blow (you can use the vacuum cleaner). No need to wipe anything with a damp cloth.
5. The next step will be attentive consideration and detection of the cause of the problem.

In some cases, BP fails due to a chip. Therefore, it should be carefully inspecting its details. Special attention should be paid to the fuse, transistor and condenser.

Often, the cause of the power supply breakage is the swelling of capacitors, which break due to poor working coolers. This whole situation is easily diagnosed at home. It is enough just to carefully consider the upper part of the capacitor.

swollen capacitors

The convex cover is an indicator of the broken. In perfect condition, the condenser is an even cylinder with flat walls.

To eliminate this breakdown, you will need:

1. Remove broken capacitor.
2. It is installed in its place similar to a broken new serviceable part.
3. The cooler is removed, it cleans its blades from dust and other particles.

In order not to expose the computer overheating, it should be blocked regularly.

In order to check the fuse in another way, it is not necessary to fall out, but on the contrary to attach copper core to contacts. If the BP starts working, then it is enough just to solder the fuse, perhaps he just moved away from the contacts.

To verify the safety of the fuse, it is enough to turn on the power supply. In the event that it burns the second time, then it is necessary to look for the cause of breakage in other details.

The following version of the breakdown may depend on the varistor. It is used to skip the current and align it. The sign of its malfunction are traces of nagar or black spots. If such were discovered, the detail should be replaced with a new one.

varistor.

Note! The varistor is the part of the computer that is checked in the on state, so it is necessary to be careful and attentive. According to a similar principle, each individual detail is checked: diodes, resistors, condenser.

It should be noted that checking and replacing diodes is not too simple task. To check them, each diode should be dropped separately or immediately all the item. It should be replaced with similar details with the stated voltage.

If after replacing the transistors, they burn again, then you should look for the reason in the transformer. By the way, this item is hard enough to find and buy. In such situations, experienced masters recommend buying a new BP. Fortunately, such a breakdown happens quite rarely.

Another reason for the breakage of the BP may be associated with ring cracks that violate contacts. This can be detected and visually, thoroughly examined the printed bar. You can eliminate a similar defect with a soldering iron by performing a thorough soldering, but at the same time you have to be able to solder well. With the slightest error, you can disrupt the integrity of the contacts and then you have to change the entire part entire item.

ring cracks

If a more complex breakdown was detected, then excellent technical training will be required. Also, you will have to use complex measuring instruments. But it should be noted that the acquisition of such devices will cost more than all repairs.

It should be known that the elements that require replacement are sometimes in short supply and not enough that it is difficult to get, so they are also expensive. If there is a complex breakdown and repair costs exceed the price compared to the purchase of a new power supply. In this case, it is more profitable and more reliable will be purchased by a new device.

Checking performance

After the reasons that were removed from the working Mode of BP, it must be checked.

The most elementary operation is to turn on the computer to the network. But, by the way, it can be performed without connecting PC. It is enough to connect to the BP any load, for example CD-ROM, and then you need to shorten the green and black wire in the BP connector and turn it on.

If everything is in order, then the fan and the actuator LED will immediately turn on the serviceable power supply. And naturally, the reverse reaction of the BP (if nothing began working), then the reason is not eliminated.

After the serviceability is confirmed, you can start the system unit assembly.

Before taking on to the independent repair of the power supply, it is necessary to be quite confident in your knowledge of electrical appliances:

1. First you can read the literature that can be easily found on the Internet, where the reasons and signs of the BP breakdown are described in detail.
2. It is necessary to study the scheme.
3. Before proceeding to the disassembly of the system unit, make sure that it is turned off from the network. It will be better if it is completely cooled.
4. Dust and any contamination should be blown away with a vacuum cleaner or hair dryer. Wet rag is not recommended.
5. The study should be carried out alternately all the details. It is advisable to check every time in the work of BP.
6. If there are no skills to work with a soldering iron, and without soldering can not do, it is better to turn to a specialist, it will cost it cheaper.
7. If parts and repairs are more expensive than a new BP, then it is better to think about acquiring a new part.
8. Before you start repairing the power supply, you need to make sure that the network cable and switch are good.

Signs of the broken power supply

In an empty place, the malfunction BP will not arise. If there are signs that indicate its malfunction, before starting repair, you should first eliminate the reasons for the failure of it.

1. Bad quality of the supply voltage (voltage drops).
2. Not very high quality components.
3. Defects that were allowed at the factory.
4. Bad installation.
5. The location of the parts on the stove of the power supply is located in such a way that leads it to contamination and overheating.

Signs:

1. The computer may not be turned on, and if you open the system unit, you can find that the motherboard is not operational.
2. BP can work, but at the same time the operational system does not start.
3. When the PC is turned on, everything seems to work, but after some time it turns off. It can work power supply protection.
4. The appearance of an unpleasant odor.

Malfunction BP is impossible to miss, because problems begin with the inclusion of the system unit (it does not turn on at all) or after a few minutes of operation turns off.

If at least one of the problems is noticed, you should think about the elimination of malfunction, otherwise, the computer can easily fail, and then do not do without the intervention of an experienced specialist.

MAJOR MACHINES:

1. The most common point that can affect the operation of the power supply is the swelling of the condenser. A similar problem can be determined only after opening the BP and its complete examination of the capacitor.
2. If at least 1 diode goes out, then the entire diode bridge fails.
3. The burning of resistors, which are located near condensers, transistors. If such a problem happens, you will need to search the problem in the entire electrical scheme.
4. PWM controller malfunctions. It is quite difficult to check, for this you need to use an oscilloscope.
5. Power transistors also often fail. The multimeter is used to check them.

Note! Power capacitors have a property for some time to hold the charge, in this regard, it is not recommended to touch them with bare hands after the power is turned off. Also, it should be remembered that when the power supply is connected to the network, you do not need to touch the slab or radiator.

Repair cost

If you do an independent repair of the power supply, and at the same time not to have the necessary tools at hand, first of all you have to spend money on their purchase. This amount can reach from 1000 rubles to 5,000 rubles.

As for the BP itself, everything depends on the details that came into disrepair. On average, repair can do up to 1500 thousand rubles.

To note: the power supply in the former use in good condition can cost 2000-2500 rubles. This applies to models for old computers. Modern PCs are equipped with more expensive BP.

In the service center, such a procedure can do about the same amount. But at the same time, it should be remembered that the specialist always gives a guarantee for its work.

sLARKENERGY.RU.

How to repair the computer power supply with your own hands

The problems of unstable voltage in AC networks - the Beach of the domestic power grid, which leads to the failure of many household appliances. For example, a stationary computer. And in the process of work, and in the shutdown state, this device is subjected to a negative impact of voltage jumps. The thing is that mostly negative impacts are directed to the power supply, which even when the computer is turned off still works. And, it means that this is the most vulnerable place. Therefore, it most often fails. And here, many people have a question of what to do: buy a new one or repair the computer's power supply with your own hands?

Power supply for computer

The question is actually delivered very correctly. Everything will depend on what kind of computer assembly. If the power supply is assembled from unleniard parts (they are usually called Nonimima), then this is a cheap option that does not make sense. Easier and cheaper will choose and purchase a new one. Although try to make the repair of a computer power supply can be repaired on it. Even if you do nothing, it will be a good experience. So it is worth tinkering with him at leisure.

But if your computer has a branded power supply, it will be replaced by a new one, therefore it makes sense to figure it out in its configuration and scheme and repair yourself.

By the way, there is an easy way to check the performance of the power supply. To do this, it must be turned off from the motherboard. Just disconnect the connectors of the wires leading from the block to the plateau. Connectors can be 20 or 24 pin (4 or 6). To check whether the block works, it is necessary to move 14 or 15 contacts with each other (if the plug is twenty-contact) or 16 and 17 (if the twenty is pin). That is, the wires of green (sometimes gray) colors and black are connected. Then the block itself is connected to the network through the outlet. If the culler fan earned, then everything is in order, the reason is not in it. We must look for other breakdowns.

Computer power supply in the system unit

Repair process

So, let's start with the reservation, which will determine the root cause of the question, how to repair the computer power supply? Remember that the power supply itself in contrast to the computer is operating under a voltage of 220 volts. Therefore, high capacity capacitors are installed in its scheme. It is they who accumulate the tension that can be kept for a long time.

Repair with your own hands of any electronic apparatus is based on working with a soldering iron. And if you have a big practice, you should give up this venture. Still, a computer power supply unit is a responsible device, on which the computer will work or not.

Plus, everything will have to deal with the scheme along the events, because you can hardly find the exact scheme, even on the Internet. There are fundamental schemes, but it does not mean that in your power supply she will be exactly the same. Therefore, everyone will have to do in the repairs.

Internal power supply device

Where to begin

First of all, it is necessary to remove the lid and clean all the insides from dust. The thick layer of dust becomes a barrier that prevents the heat removal from working parts. So this is also the reason for the failure of the block.

Now pay attention to the fuse. Typically, a part is installed on 5 A. This is a glass flask, inside which the fine metal thread passes. If there is no thread, the fuse burned down, it must be replaced. But sometimes it seems to be present, so it's worth checking the fuse. How?

• It will be necessary to solder at the ends of the Copper Wire with a diameter of 0.18 mm.
• After that turn on the block into the outlet.
• If the culler fan earned, the fault is the fuse.
• Fresh it from the schema and install a new one.

First of all, you need to clear the insides of the computer from dust

Condencators

Typically, capacitors with a large capacity are installed in power blocks. It is in them that the voltage is accumulated. Therefore, these are the details that most often fail (in 80% of cases).

The first thing that should be rushed into the eyes is bloating and elevation of electrolyte. If this is all available, it is 100% that the capacitor does not work.

Attention! The bad work of the fan becomes the cause of the condenser. The thing is that the fan must cool the capacitors that are heated by accumulating the voltage in them. Therefore, experts recommend periodically to carry out the fan bearings and cleaning the entire cooler.

But sometimes visible defects in capacitors are not observed, so it is worth checking them with a multimeter for checking resistance. If the resistance is large (compared to the face value), then this suggests that there was a gap between the internal clapper and the conclusion. Experts call this situation - a condenser in the cliff.

Swollen capacitors

There are in the power supply diagram and electrolytic capacitors. They can also beat out, but it makes no sense to change them, because it is necessary to first find the cause of their bloating, and then replace. Usually the reason is the failure of the voltage stabilization scheme. So still do not understand with it, it makes no sense to change electrolytic capacitors. It will not help, all the same swell. But the repair of computer blocks of this type can only spend a specialist, do not master it with your own hands. Plus, professional measuring instruments will be required. So the optimal option is to include the power supply into the workshop. In this case, you do not have to choose.

Transistors

This is another detail that can cause the inoperability of the PC power supply. Pay attention to the constructive feature of the transistor. He has three legs:

1. Base.
2. Collector.
3. Emitter.

So, to determine whether the item works or not - it is necessary to call it a multimeter. And here you need to know how to norp. The transclon can only be carried out in two directions:

• Base - collector.
• Base - Emitter.

Transistors in the power supply

If you change the polarity of the transvers, then nothing will happen. The same applies to the directions between the collector and the emitter. To properly conduct a transclon, it is necessary to connect the probe with the red wire to the transistor base, and the black wire to the collector or the emitter. If the display highlighted the indicator within 650-800 mV, then everything is fine, the transistor is integer.

You can ring the emitter collector. Here the resistance must be infinite, the display will show a unit. If this transition breaks through, the multimeter will emit a characteristic signal. But keep in mind, it is not necessary that other transitions also do not work.

As for diodes, these small devices are almost the same as transistors. That is, the transistor is two diodes connected in series, but cathodes at one point. Therefore, their transvers is practically checking the transition of the base collector or the base-emitter. Resistance indicators are exactly the same.

Transistor design

Rework

What is the remission of a computer power supply? That is, is it possible to replace some of its details to improve the operation of the device? Some masters try to make any changes, and this itself achieves the best results. We will not go into the details of all modifications, because the conversation is about independent repairs. And some of them do their own hands.

The simplest alteration is to reinstall capacitors that are mounted in the power bus. They are designed for a voltage of 5 V. So, the more voltage withstand these devices, the better. It would be nice to establish capacitors designed for 10 V, but they have large sizes, so they can not fit on the plateau. Therefore, it is worth picking up the condenser with a large voltage that would fit on the plateau, for example, by 6.5 V.

Attention! Replacing the capacitor is associated with its correct installation on the plateau. Therefore, pay attention to the negative output strip. It is wide vertical and bright. So the new device must be installed exactly in the same position so that the strip falls on the old installation location.

The main requirement for repairing the power supply with your own hands - the ability to work with a soldering iron

Conclusion on the topic

So, if all the details of the details have been replaced, the power supply must earn. The easiest option is to check it on - turn it on in the outlet. A culler fan must be tightened. There is another more reliable option - check the multimeter main connectors for the presence of voltage. Their value must be 12 and 5 volts.

As you can see, repairing the power supply - the process is really not easy. Although if it is sorted out and go through the scheme several times, changing the one, then another tider, then you can already consider yourself a homemade master. But most importantly, as practice shows, this is the ability to work with a soldering iron.

OnlineElektrik.ru.

Repair of computer power supplies with their own hands. Block scheme

Power supply in a personal computer is one of the most important components. These devices differ not only in power, but also according to constructive features. Before release, all models undergo a specific standardization procedure. The main elements of the blocks can be considered a transformer, a converter, as well as a rectifier. Additionally, depending on the modification, various cooling and protective systems are installed on the device.

How to make a replacement block?

Replacing the power supply is quite simple, and this can be done independently without any effort. To do this, a person from the tools will need only a cruciform screwdriver. There is a block in the case of a personal computer at the back side where all the connectors are located. First, you need to unscrew four nuts on the panel. After that, the unit will be disconnected from the cover of the personal computer, but it is impossible to extract it at the moment. This is due to the fact that the unit remains connected to the motherboard, the hard drive, as well as CD-ROM. Therefore, a person is obliged to disconnect all the contacts that prevented this before removing the device.

General diagnostics of the device

When the power supply unit breaks, first it is necessary to make it a general diagnostics to understand the cause of the fault. To do this, you need to disconnect the element from the personal computer. For this, four nuts, which hold the device's protective cover are unscrewed. Make it can be using a cruciform screwdriver. Next, the cover must be carefully lifted up. In order for a person to have full access to all block elements, it is important after removing the panel to disconnect the device's cooler.

It is attached, as a rule, on four nuts, and you can also cope with the cruciform screwdriver. Next, you should carefully examine all the components. In particular, it is important to pay attention to the dark spots. When overheating the system, as a rule, black places remain. After this, you can disconnect the transformer, as well as inspect the converter. If the integrity of the winding is not violated, then the unit needs more thorough check.

Repair of "Asus" blocks

Many buyers ASUS power supply is chosen due to high power. On average, it is approximately 500 W. Cables for models are mainly used in a non-module type. It is on average the best power supply unit from "Asus" in the region of 3 thousand rubles. Rectifiers in this case are installed next to the transducers, and they have a fairly good bandwidth. All standard connectors are provided.

At a voltage of 3 to the device, an average load is capable of withstanding at 24 A. Separately, it should also be noted the operation of the filters. They are installed in the housings of only network type and are located near the rectifiers. The main problem of blocks of the above company is considered to be the overvoltage of the inductor inductor. Caused by this due to the level threshold voltage Radically increases. As a result, the integrity of the winding is broken. In order to replace the inductor inductor, the emergency power unit must be removed from the personal computer.

Next, you need to unscrew all the nuts that hold the upper P-shaped lid. After that, the cooler can not even touch. The coil in this case is possible to disconnect separately. At the same time it is held on the chip in just one contact. After replacing the element, the unit must be collected again and insert into a personal computer.

Common problems with Samsung blocks

Blocks "Samsung" are currently in great demand. Modulators almost all models are used binary. An important advantage can be called a good signal conductivity. In this case, the delay in the system is quite small. However, the shortcomings of the samsung power supply also has. First of all, a common malfunction should be noted, which is caused by the conflict of the system with the converter. This process occurs due to the fact that the bandwidth in the device changes. In order to solve this problem, the block converter must be replaced.

It is quite simple to make it, if there is a cruciform screwdriver at hand. In this case, the cooler in the block will have to be disconnected. Thus, a person will have full access to the converter. It is attached on the chip using a special retainer. In order to remove it, you need to press with your fingers on both sides into small protrusions. After that, the converter will be disconnected. Before installing the new model, the plate on which the item is located is to be cleaned. Suitable for these purposes. Ordinary melt. Some specialists are additionally advised to lubricate it with ethyl alcohol.

Repair of the input filter

Repair of computer power supplies with your own hands, if the input filter breaks, is quite simple. To do this, you must first extract this item. It is located in the device usually near the rectifier. At the same time, in some cases, the filter is connected to the converter. In order to test its performance, it is necessary to inspect its upper part. If dark spots can be seen on it, it means the element was overloaded. In this case, a person is obliged to clean all contacts and fix the filter in the same place.

Service inverter

In order to make the repair of computer power supplies with their own hands when the inverter breaks, you need to have a cruciform screwdriver. The above element is located near the cooler. You can disconnect it by stepping the plate, which is found at its base. In some cases, manufacturers install two locks in this place, which are interconnected. In this case, the inverter is disconnected by two fingers. Repair of the device in such a situation must begin with an inspection of precisely base. It represents an smooth plate to which the regulator is attached.

If there are any defects at the base, the element will have to be completely replaced. To do this, you will need to purchase a similar model. In order to secure the inductor in the same position, you must first raise the plate up. If there are two locks, then before installing the inductor, they move away. After that, the protective cover is screwed to the block, and the device is reappeared on the body of a personal computer.

Inspection controller control

Make repair of computer power supplies with your own hands when the controller breaks is quite difficult. The whole problem in this case is in the presence of a large number of electrodes. When the system is closed, the controller is not able to work properly. In order to clean the contacts, many advise the use of eraser. At the same time, great efforts to it should not be applied. If it does not help, the controller is completely twisted from the rectifier and is replaced with a new one.

You can do it with a screwdriver. In this case, it is important not to damage the chip because it is located quite closely and is very vulnerable to mechanical contacts. Replacement of the controller, experts are carried out only with the participation of the rolling. In this case, the lower part of the element must be thoroughly wipe. Ethyl alcohol in this situation is not recommended.

Couple Service

Repair of computer power supplies with their own hands on a part of the cooler replacement can be quite simple. To do this, first of all remove the side cover from the personal computer. Then disconnected directly block uninterrupted power. The coolers in it today are set up a wide variety. However, they are attached, as a rule, everything is on the side wall. In order to remove the device, you must use a screwdriver. In this case, the nuts usually there are four on it.

After that, you can directly disconnect the cooler from the block. However, it is important to watch the cable of his power supply. It is best to disconnect it in this situation. You can just do it, raising the port, which is located near the chip. After that, the cooler can be conveniently placed on the table for further work. First of all, it is important to remove the sticker, which is an additional protection. Under it can be located a small rubber gasket. Depending on the design of the fan, it can cover the connecting rod or rolling bearing.

In order to remove the sleeve, it is necessary to remove the protective ring that holds it. After that, the bushing is supervised. At this stage, it is necessary to watch the washer fell to the floor. Then the cooler is cleaned with machine oil, and it must be collected in the reverse order. After turning on the power supply, you need to check the performance of the fan and make sure of it. If after all of the above actions, it makes any sounds, then the device has been collected incorrectly.

Substitution of power choke

Make the repair of the PC power supply in part of the replacement of the throttle can only with the use of a soldering lamp. In order to get to the specified part, the unit must be disassembled completely. Additionally, you should disconnect the inverter. The converter from the microcircuit is last rented. The throttle for the block should be selected by a specific series. In this case, much depends on the power of the device. Contacts are starting to be soldered from the side of the chip, and then the choke is connected to the transformer. Subsequently, with incorrect wiring, contacts can be connected again.

Inspection of the microcircuit

Before making the repair of the PC power supply, the microcircuit is inspected at mandatory. In general, this item on its device is quite complicated. Considering this, refer to the chip needed with special cruelness. First of all, experts advise inspecting resistors that are located next to the controller. In some cases, their contacts overheat. In general, it is possible to check the performance of the chip, simply by connecting the normal model.

Repair of radiator

The radiator in the block breaks quite rarely, but such cases are. In this situation, it must be disconnected from the transformer. Only after that, a person can examine him. At this stage, only the foundation base is checked. In particular, it is necessary to inspect its platform for any defects. After that, it is examined by the part from the top. If dark spots can be seen on it, then the radiator came to unfortunately. To replace it, you need to purchase a similar product in the store. It is attached to the transformer, as a rule, a screwdriver. However, much in this case depends on the manufacturer.

How to check the pulse transformer?

Make the repair of the block in terms of the transformer inspection can only be disconnected in advance the cooler because it will be interfered in the future. After that, the transformer is examined on the sides. If the contacts are contaminated, it means they must be cleaned. For these purposes, the usual eraser is perfect. However, alcohol based napkins can also be used. If the specified procedure does not help in the operation of the block, then the transformer must be changed.

Replacing the controller on the transformer

Replacing the controller at home is carried out very quickly. From tools for this procedure, only a cruciform screwdriver will be required. The controller is attached to the transformer using only one clamp. It removed from the fuse is quite simple, and the big physical effort is not required. Next, it is important to clean the metal part and rub it with a dry cloth. After that, it is possible to connect a new controller model. When the block is turned on, the device must work quietly. If no noises appear, then the installed item in its parameters is not suitable for the block.

Breakdown rectifiers

The repair of the block is done in terms of faults with rectifiers only in special workshops. At the same time, replacing it at home is also not possible. Considering all the above, trying to extract the rectifier from the chip is not necessary. All this in some cases ends simply broken block. Experts with the help of a soldering iron and tweezers are able to extract this device Without damaging the fee.

After the inspection of the rectifier, it will be possible to solve his fate in the future. As a rule, it is the easiest way to banally replace to a new one. However, this situation takes into account the reason for his breakdown. The rectifier itself does not break, and in parallel in the block also the converter with a transformer also come out. All this is a consequence of a sharp increase in the limit voltage in the network.

Problems with Blocks "AeroCul"

Models of this company today are actively bought out. It is the average power supply (market price) in the region of 3 thousand rubles. The power of the usual model is at a mark of 500 W, and the load device is maximum able to keep 23 A. A common problem of these items is considered to be damaged the modulator. However, converters often come out of the overvoltage. At the same time, the fans are set, as a rule, reliable.

Blocks of Zalman

Company "Zalman" Power Blocks Reviews are good. Many models of this brand in limit capacity are able to boast at the level of 550 V. At the same time, the load transformer can be held at a mark 25 A. powerful block Nutrition from "Zalman" about 3200 rubles. Rectifiers in this case are installed broadband. In turn, the coolers can most often meet without rolling bearings.

The lubricant disappears rather quickly, and ultimately the uninterruptible power supply starts working loudly. In such a situation, the cooler is more expedient to disassemble and replace the displaced items if necessary. Also a common problem of blocks of this company is considered to be the ability of the converter. This is due to a banal increase in voltage in the wiring of the house. As a result, the transformer inside the block can be abolished.

fB.ru.

How to repair the computer power supply

The power supply (BP) of the computer is a complex electronic device that provides powered by all computer devices. As a rule, the power supply has several power connectors with various output voltages intended for the power of those or other devices.

Checking the performance of the power supply

You can pre-check the power supply without special devices and without disassembling the power supply itself. The essence of the check is to check the power supply system, as well as checking the computer devices to a possible short circuit.

Disconnect all power connectors from all system unit devices. To disconnect the power connector of the motherboard, it is necessary to fix it first. Now make manual start of the power supply. To do this, you need to close the wire or stationery closet two outputs on the motherboard power connector (usually it is a green wire and any black, less often instead of green can be gray wire). If there is an output marking on the connector, the POWER ON and GND output should be shown.

After that, the power supply should be turned on, check which is possible to rotate the cooler of the COP cooling system. If the inclusion of BP did not happen, then it is faulty and its further repairs should trust a specialist.

However, the successful inclusion of BP still does not guarantee that it works stably. In this case, first of all, it is necessary to check the system unit devices (PCs) for a possible short circuit.

Connect to power connector first motherboard And turn on the BP if it started, then the motherboard is proper. Now turn off the power supply and disconnect the power cord. It is necessary to guarantee the re-launch of the BP manually.

Now connect successively other computer devices (hard disk, drive, etc.) and turn on the BP. If you do not identify the fault, the next step will be checking the power supply itself. Well, and if when connecting one of the devices, the power supply is not started, it is likely that in this device in the power circuit there was a short circuit.

The power supply can work successfully, and output voltage Being understated or overestimated, which will lead to the instability of the computer. It is possible to determine this by using a multimeter (digital voltmeter) and measure the output voltage on the power connectors. On the multimeter, switch the handle to the measurement position constant voltage (DCV) with a measurement limit of 20B.

Connect the Black Multimeter Property Multimeter to the Black Wire of BP. This is our land, and the second (red) touches to the appropriate output of the power supply connector, that is, to all the rest.

The output voltage of the BP must be in acceptable limits: for supply voltage + 3.3V (orange wire), the allowable voltage deviation should not exceed 5% or from + 3.14V to + 3,46V.

For supply voltage + 5V (red and blue wires), the allowable voltage deviation should not exceed 5% or from + 4.75V to + 5.25V.

For supply voltage + 12V (yellow wire), the allowable voltage deviation should not exceed 5% or from + 11.4V to + 12.6V.

For supply voltage -12V (blue wire), the allowable voltage deviation should not exceed 10% or from -10.8V to -13.2V.

It is best to carry out the measurement under load, i.e. With the computer enabled.

Fault Power Supply

Before you start to find a fault, the BP must be removed from the computer. Put the computer housing on the side and unscrew all four screw fastening screws. Gently remove it from the housing so as not to damage other computer devices and disassemble, removing the casing. After that, remove the entire dust accumulated inside with a vacuum cleaner.

Replacing the fuse

All power supplies have a similar design and functional circuit. At the entrance of each BP there is a fuse, which is in a printed circuit board, but there is also a BP on which landing sockets are installed, for the convenience of replacing the fuse. It should be checked first.

The blurring fuse thread testifies to either a short circuit either about the work of BP under high load. Replace it similar to the same triggering current or slightly high current (for example, if you have a fuse at 5 A, it can be replaced by 5.5-6 A - no more!). But, in no case cannot be installed a fuse with a smaller trigger current - it immediately begging.

If all the same, you encountered a fuse, which is in a printed circuit board. In this case, you can establish a conventional fuse-fitting fuse, sprinkled to its ends a small copper wire with a diameter of 0.5-1 mm, which will perform the role of legs.

In the BP scheme after the fuse, a power filter is installed on high-frequency pulse transformer, diode bridge and electrolytic capacitors.

I want to immediately warn the respected readers of you that if you figure it out and there will not be the elements of the network filter, then you installed a cheap and low-quality BP in the PC and look like this.

Also in the power circuit of the power supply circuit, transistors on radiators are installed, usually only two. After that there is a contour of the formation of the voltage and its stabilization.

After disassembly, make an external inspection of BP, it should not be disconnected capacitors, burnt radio elements, cut off or disappeared wiring, poor soldering, torn paths on a printed circuit board and other damage, as well as missing radio elements.

The most common cause of the failure of the power supply is the usual overheating. It may be connected with dust, which accumulates inside or with a cooling system malfunction. Therefore, in a timely manner, both the power supply and the entire computer from dust, and also produce periodic lubrication of cooling fans.

Replacement electrolytic capacitors

The discrepancing electrolytic capacitors detect very simply, they have bulges in the top. Often, electrolyte flows out of them, which is talking about the characteristic paths on the printed circuit board. Such capacitors must be replaced by similar in tanks and power voltage.

At the same time, it is allowed to replace capacitors of the same container to the capacitors similar to the tank, but with a large operating voltage. The main thing in this case is to enable the capacitor allow it to be placed on the printed circuit board.

It is also important when replacing electrolytic capacitors to observe polarity. If there are a lot of discrepanied capacitors, their replacement will not lead to restoration of the working capacity of BP, the reason is likely to be in the other.

It is also not necessary to change the charred resistor or transistor with new ones, the reason for such faults is usually in other radio elements or nodes of the scheme, so that without special skills and devices to detect the reason to be independently problematic. In this case, you have a direct road to the service.

The cause of the malfunction is quite often power chains - these are transistors installed on radiators, filter and capacitors. You can check them with the help of special devices or using an ohmmeter. But for this they must be dropped.

Also failure can diode bridge (four rectifiable diode or diode assembly) this element can be checked without dropping out pCB, Use for this an ohmmeter or multimeter with a function of checking the diode (the measurement limit of the Ommeter - 2000). When the device is connected to the diode in one position, it should show resistance (about 500), and with inverse connection - the resistance must be maximal (strive for infinity).

Capacitors are also checked by an ohmmeter, when connecting which there should be no cliffs and short circuits. But when checking the filter, the mould show minimal resistance. When identifying a faulty item, it should be replaced with a similar one. It should not be used to replace the domestic counterparts for the replacement of radio elements.

If you managed to find a malfunction and successfully eliminate it, then after turning on the BP to immediately check the level of all output voltages and only then install it in the computer. If you have not been able to independently fix your BP, then do not be discouraged, probably the cause of its malfunction lies in the formation of the supply voltage or in other nodes, to identify which independently and without special devices will be very difficult. Also, such a repair can be economically inappropriate.

All so far before new meetings.

helpComputerBlog.ru.

Instructions for cleaning BP ATX. From time to time you have to clean a personal computer. If this is not done at all, there may be significant problems. Starting from hanging and turning off the power, ending with burnt out details.

The computer has just turned off. The pair of movements of the vacuum cleaner hose inside the system block of the result did not bring special, after a day, new shutdowns. The cause of overheating and, accordingly, shutdowns, oddly enough, it turned out to be too cracked by dust cooler and the inside of the BP. Without removing BP from the system unit, the scale of pollution was on the face (and in the literal sense of the word - dust fell out of all the cracks). Inspection of the work of the cooler, revealed him ineffective work, in the form of a decrease in revolutions.

Before the subsequent actions, be sure to remove the plug of the power board from the outlet. You need to disconnect the feed plugs running from the PC power supply (in my case it is nutrition of motherboard, processor, hard board and drive), unscrew it from the system unit.

Then it is necessary to carefully pull out the BP and it is desirable to put a smooth surface on the surface so that then not to remove the dust spot in the process of cleaning.

Armed with a crosst screwdriver, open the lid (cooler was also screwed to it).

After opening and evaluating pollution was very surprised at the performance of this ATX BP. Earn 8 years old and only under the ninth year to start giving failures - amazing.

The cooler from the tracking of time, too, was injured from dust and dirt. The blades stopped rotating at the right speed, and at times they did not rotate at all. About the process of cleaning and order of action, I wrote in. As practice has shown, completely from dust can be delivered only with disassembly of BP completely. Dust turned out to be rather dense and nitain, so remove the remnants of dust in hard-to-reach places with a simple increase in the power of the vacuum cleaner - it did not work out.

Next, it is necessary to free all the output wires and wires connecting to the main ATX BP board. The output wires, in most cases, are fixed by plastic clips-locks in the opening of the output of their BP. In the disassembly process, I advise you to do not particularly flavor all the wires that come from the power supply. Although they have a fairly large diameter, they can easily fall off from the board, as it is quite tough throughout the entire length and especially vulnerable in the site of the soldering. After the release of all wires, you need to unscrew the main fee from the case.

Removing the main board has not passed for nothing. Places under the board, and there were a lot on the side wall of dust.

After quickly cleaning the lower part of the BP housing, we turn to the main board.

Currently opened a picture of not quite good shades. Fortunately, all this can be easily cleaned with a simple vacuum cleaner with a brush nozzle.

With a removed main board, cleaning goes much better. Since the vacuum cleaner does not work between high parts, it is better to use compressed air - and the details will not be damaged, and from dust quickly get rid of. It is advisable to apply compressed air outdoors or indoors using a vacuum cleaner directly near the sprayer (so that the dust does not twist in the air).

After cleaning work, we collect all the insides of the power supply in reverse order. Do not forget to connect all forks back, tighten the power supply cover. And finally, do not bring technique to such a state, it should be cleaned it periodically. I was still very lucky that the reason for the power failure was the banal overheating. After all, before the power blocks, no one dozen of the details were unparalleled. See you soon! With you was BFG5000.

The need to replace the power supply occurs quite often. You may encounter such a need due to the desire to upgrade the computer and increase its power or due to problems with accessories, for example, when it burns. The following instruction will allow promptively replace power supply on a computeron new. Even if you are a novice user, just follow each step carefully, and you will handle this task:

1. Turn off the system unit from the socket. This is an important safety condition that allows not to damage. computer device. Disconnect all connected cords from it, including the keyboard, network cable, speakers and mouse.
2. Remove the housing from the component. You need to unscrew screws, with which the power supply is attached to the housing. It is recommended to fold these fastening elements into a separate container not to lose.
3. Now you need to open the side cover. The old power supply indicates all the important information that you need when buying new equipment. It is important to remember or rewrite not only the power and main parameters, but also a type of plugs. So that the newly acquired power supply unit fully functioned and was compatible with all the computer, it is important to consider this nuance. Make sure that the new device is the same width as the previous one. In length, they may differ.
4. Having a new block acquired, proceed to the next step on which you need to disconnect the old model. Pre-remember the wire connection scheme, sketch or take a picture to connect the wires to the new block in the same way. If you are improperly connected, you will not be able to use all the features of the computer.
5. Disconnect all cables connected to the old block, from the respective components and motherboard.
6. Unscrew the bolts from the power supply, carefully using a screwdriver.
7. After removing the old block, put a new component in its place.
8. Follow the wire connection scheme and according to it correctly connect the cable to the new block into the appropriate connectors. Observe safety regulations.

When connecting the motherboard to a new component, consider the board can be connected using 2 wires from the power supply. It is worth considering that various plugs are used to connect hard drives of old and new models. To connect new SATA hard drives, you need to use cables that are similarly called. Connecting old hard drives similar to drives. All wires need to be connected in the same order. It is worth noting that when connecting to the motherboard, the power connector may require certain efforts. The advantage of the design of such connections is that the user is insured against incorrect wires. If you fail to connect the connector, then expand it and try to insert it again. It is important to install cables in such a way that they do not touch the fan, as well as its blades. Unused wires should be fixed in the inside of the system unit.

9. After connecting all the wires, put the cover from the system unit and secure it with mounting bolts. Then plug all the necessary components outside, including wires from the mouse, monitor, network cable, keyboard, etc.

10. Check the computer's performance with the new system unit by turning on the PC.

Want to replace the power supply?

Sometimes it happens that after the morning launch of the computer, instead of the usual quiet operation, the user hears very unpleasant sounds that resemble whistle, grinding or squeak.

In this case, it is worth listening to a computer and determine where the sound comes from. As a rule, the culprit is not the system speaker itself, but one of the devices located inside the PC. Some believe that the processor is frustrating, but it is unlikely, because this device is a monolithic silicon piece that is not able to publish any sounds. Therefore, most often beeps and the power supply does not turn on. Sometimes other components can be the cause, so it is necessary to conduct an independent diagnosis.

Determine the exact source of whistle

First of all, it is recommended to dismantle the side cover of the "Systemster" and carefully inspect the processor itself, as well as the cooler located on it. After that, you need to try to enable your computer and gently reduce the ear to the intended place to appear.

Most often beeps the block of hard drive or maternal card. More precisely, the sounds do not make themselves, but cooling fans.

Based on the experience of specialists, it is possible to declare with 90% confidence that the cause of this trouble is the BP. In this case, you must pull it out and try to install another working device instead. However, this procedure must be performed with accuracy.

Determining power supply power

Not everyone knows that during the replacement of the BP, it is necessary to determine the power with which it works. It is also recommended to refine the manufacturer of this instrument. If the old power supply is fried and works at 300-350 watts, then the new equipment must meet these requirements. In case of installation of an aggregate that will have a greater power, it will not be worse. Less indicators should not be.

If we talk about the manufacturer, then today there is a huge amount of Chinese products on sale, which indicates the power of 400-450 watts. However, in fact, such BPs give out a maximum of 300 watts, which negatively affects the operation of the power supply. As a rule, when installing such aggregates, they fail in 6 months after operation.

How to remove the old power supply?

Deciding with the new BP and acquiring its store, you need to get rid of the old hardware. Before you start, you must definitely turn off the computer and the cable that goes out of the power supply. To do this, it will be necessary to remove the side cover of the system unit.

After that, all the wires are disconnected, which go from the old power supply, as well as other devices of the computer and the motherboard. It is worth paying attention to the fact that additional wiring can go from the video card if this is installed. At this stage of work, it is recommended to write down exactly what the wire where it was connected. This will be useful if the user uses a large number of devices.

Then you need to unscrew 4 bolts on which the power supply itself is located directly on the back of the computer. After that, the device can be pulled out.

Installing a new power unit

This procedure also does not require any special knowledge. In some situations, for example, when a pulse power supply is frightened, this method becomes the only solution to the problem.

In order to install a new BP, you must first fasten it to the rear wall of the computer. After that, using the previously prepared scheme, you need to connect all computer devices to the appropriate connectors. At the final stage, it remains only to close the side cover of the system unit, connect the power cables and turn on the computer.

This will make it possible to effectively solve the problem if the computer is sicked. If there is no desire or possibility to change the device, then in this case other nodes can be considered in which there may be problems that cause such audio signals.

Cooler

If the power supply is sick under load, this suggests that the problem is most likely in the fan. Since the power blocks of modern laptops are very hot, almost all of them are equipped with very powerful coolers. In expensive models, fans of silent type are installed, characterized by a longer service life. However B. simple blocks Nutrition is usually the coolers, which quickly fail. This is exactly what explains why the power supply is beeps.

Most often, the fans begin to buzz due to the accumulation of dust. This is explained by the fact that in the process of cooling the blade of the product is captured by air and, accordingly, accumulate a lot of dirt. In this case, you can try independently disassemble the cooler, lubricate it and clean it from pollution.

At the same time, you should not neglect similar sound effects. If the power supply is bursting due to the fan, the cooler may fail. This leads to serious overheating and damage to all computer systems. Therefore, in this case, the detail needs to be removed and try to restore on its own.

We disassemble the power supply

As in previous operations, you must first turn off the computer. After that, the power supply is removed (how to do it, it was described above). In the process of work, it is worth not in a hurry, since, depending on the "Sistemnik" model, the BP may be located both in the upper and lower part of the aggregate. In some cases it is quite difficult to pull out from the system unit due to additionally installed boards.

Before disassembling the power supply, it is recommended to photograph it in order not to get confused later in the connection of the wires. In the next step, it is necessary to unscrew the screws located on the cover of the BP (usually 4 of them, but may be 6). After opening the lid, you can see the cooler itself. If the power supply is burst, then its replacement, as a rule, helps.

Change cooler

At this stage, the work should not be hurry. Perhaps buying a new fan does not have to.

First of all, it is necessary to carefully clean all the internal supply of the power supply. To do this, you can use a pile brush, a sprinkled aircraft or a conventional vacuum cleaner.

Most of all is worth paying the fan itself, as a lot of dust accumulates on it. If such manipulations do not help and still begging the power supply, then in this case you need to go further.

It is necessary to remove the branded sticker from the cooler and remove the rubber plug located on the bearing. It is not necessary to remove the lock washer to remove the remains of the previous lubricant. It is enough just to roll inside a little expensive engine oil and wait 2-3 minutes until it reaches the bearing. After that, you can install a rubber plug on its rightful place and glue the sticker back.

What to pay attention to?

In the process of work, caution should be caution and determine the type of fan. The devices of this class are both removable and not removable. In the first case, the bearing can be removed without any problems, and then replace it with a new one. If the power supply is equipped with a non-removable bearing, then in this case all the fan wires will be soaked directly in the device itself. It remains only to carefully cut the wiring as close as possible to the cooler and clean them. After that, the acquired cooler is installed on its rightful place, and the new wires are connected by a twist.

If the mobile computer power supply is bursting

As a rule, such devices work without fans, but even in this case they can make an unpleasant sound, especially if the wire winding oscillations occur inside. In this case, pretty simple manipulations are made.

First of all, it is necessary to open the case. This is complicated by the fact that most glued models. In this case, it is necessary to very accurately cut the plastic with a knife or scalpel. At the next stage, it is necessary to cover the coil of varnish. As a rule, it is necessary to process 3 or 4 elements. However, it is worth considering that the noble coils that are very close to the AC source are responsible for noise. Then it is enough to glue the case and wait until the lacquer is dry. The same method solving the problem is used if the power supply unit of the LED tape is styled.

If the cooler is cooler

This element can also clog dust and publish characteristic whistling sounds. In this case, the cooler also needs cleaning. However, everything is complicated by the fact that these elements work with a variable frequency of revolutions, which depends on how much the central PC processor is heated. As a rule, in such products, the thermal paste dry out, so they fail.

Clear and lubricate this fan is much more complicated, so many prefer to simply adjust the operation of the device with third-party utilities that are installed on the computer. However, you need to understand what is a temporary solution.

Other causes of whistle

If the power supply is bursting without load, for example, if you connect it to the network, pre-pulling out of the computer, then in this case you have to carry out more detailed diagnostics. To do this, use specialized measuring instruments and test all the components of the equipment with them.

It is also worth noting that powerful video cards are always equipped with their own cooling systems. In this case, you need to remove the entire fee and its fan. It will be necessary to replace the thermal colon.

If the laptop power supply is burst, then in this case the independent repair will be problematic. In addition, the situation is complicated if the manufacturer of the aggregate is ASUS. The fact is that in such laptops, the cooler and the power supply is located in the most inconvenient way. As a rule, to get to the fan, you must disassemble the entire device and remove the motherboard. However, even with the successful implementation of these operations on the cooler will be a protective seal. If you remove it, it will be very difficult to install the device back.

On other models, the power supply, as a rule, is removed very simple. To do this, on the back of the laptop you need to unscrew several screws. At the same time disassemble the entire unit does not have to. Therefore, before work, it is worth considering the scheme of the device of a particular machine.

What should not be done?

First of all, it is not recommended to diagnose malfunctions when PC is enabled. Before removing the device cover, you need not just turn off, but also pull the wire from the outlet. Just make sure that the unit does not feed food, you can start working.

When removing any boards, it is impossible to pull it sharply. It should be remembered that these elements are usually additionally attached to the PC itself with several screws.

When using a vacuum cleaner, you should not stick it deep into the system unit. So you can damage the schemes. In addition, it is not recommended to use hard or sharp objects for cleaning. In any computer store you can find sprinkled aircraft that are best suited for such events. You can also use cotton wands or soft brushes.

When cleaning the cooler and other parts of the power supply, you can use a small amount of alcohol. But it is not worth pouring it directly to the device. It is enough to moisten a cotton swab in 2-3 drops of a hot fluid, and then the solar thermal panel will be easier to be removed. However, if the PC was not used for a long time, it dries up to the condition of cement and blur material will be very difficult. In this case, you can use specialized funds that are also sold in a computer store.

Finally

An unpleasant peak in the computer can be caused by the most different problems. However, the cooling system of the power supply is most often becomes the cause. And yet it is recommended to correct the breakdown yourself only if the user clearly understands what it does. Otherwise, it is possible to accidentally apply greater harm and eventually pay for repair a more impressive amount of money. Therefore, it is better to trust the craftsmen.