You will need
- computer, power supply, small Phillips screwdriver, minimal skills in handling computer
All the described operations should be performed with the power off of the computer. Disconnect power from the system unit.
Open the side cover housing with side access to connectors on the motherboard. The unit of power most often located above the Board, but there are other options. Find it.
From unit supply to components inside your computer are the cables, disconnect them. Carefully remove the cables of the power supply of the hard drives and optical drives. If the cable power is connected to the graphics card, also disconnect it, squeeze the latch-lock.
Remove the primary and secondary cables to the power sockets of the motherboard. They are also equipped with latches that must be folded. Pull the cables carefully, you can gently sway them in the nest, but do not exert too much effort. Check that all the wires inside the computer coming from the unit power supplyhas been disconnected.
Remove the four screws that block the power supply bolted to the hull. They are located on the rear panel. While holding the second hand unit is power, so he fell inside the case for something important.
Gently, slowly then pull the power supply out of the chassis. You might have to remove the optical drive or the CPU, but in most modern cases this is not necessary.
Advice 2: How to start the PSU without a PC
Sometimes you need to run the unit power supply (PSU) without attaching it to your computer. For example, you want to check its performance or noise level, before deciding to install the device into the computer, or to seek a more quiet model.
You will need
- — power supply standard ATX.
Almost all modern BP is the unitand standard ATX. Next, you will learn the procedure for the inclusion of such unitand food. Check whether your PSU standard ATX. To see the relevant information on the device.
The procedure of starting the unitand power supply without a computer requires compliance with certain safety regulations. Before the procedure, block food, of course, must be disconnected from the network. You'll need a small wire on both edges which you should remove a bit of insulation (several millimeters is enough).
Insert the power cable connect power to unit power, but to the network it does not connect. Then connect one end of the wire into connector PS-ON. Usually by this connector fits the green wire, but cheap Chinese unitAh supply wire color may be different. The second end of the wire connect to one of the GND (COM) ports (they are black wires).
Then insert the wire power in the electrical network. The unit power will work. However, the device is better not to use this mode for a long period of time due to the fact that it works without load.
But if you want to check the noise characteristics of the unitand power supply, it may need time. In this case connect to PSU several devices, such as optical drive or hard disk. In this case, the unit power will work with the load, respectively, it can be used longer. Besides, this way you reduce the risk of failure of the device to a minimum.
If the power supply does not start, check to see if it simply turned off. On the device there should be a button on/off (not present on all models).
Advice 3: How to increase the capacity of the power supply
In the process of using a home computer you may find that the original capacity of unit power is not enough. Do not hurry to part with it and buy a new one, because power can be increased.
You will need
- — power supply unit;
- — chokes;
- — three assemblies;
- — soldering iron.
Open the power supply and estimate its technical characteristics. To do this, it is enough to gently remove the metal housing. You need to know that self-revision at home may be subjected exclusively to that unit, the transformer which has dimensions of not less than 3 x 3 x 3 cm
Replace the high-voltage large capacitors. It is recommended to install in the power supply those that have a capacity of at least 470мкф x 200V. In the low-voltage part supply chokes, which can be obtained in several ways. For example, try yourself on a ferrite ring to wrap the wire with lacquer insulation. Or remove the chokes with the old, the used and unnecessary power supplies.
Now respeite smoothing capacitors in the voids that are in the low-voltage side of the power supply to fill them. To increase the power to make three capacitors. They must meet certain parameters, namely to have the capacity 2200мкф x 16V.
Replace diode Assembly. To do this, desolder the conclusions of the Assembly and carefully pull it out of the plastic holder, taking care not to prevent attacks on the rectifier unit. Next, clean the installation area is free from residue of epoxy resin. Install a new two or three assemblies, for example MOSPEC S30D40 or similar type, they can be purchased in a specialty store. Glue the body diode Assembly to the holder with epoxy resin.
Reduce the voltage of the second, dvenadtsatiperstnoi channel in the power supply. To do this, solder high speed silicon switching diode. Be sure to turn off power at 0.6 V, if this is not done, the computer will be under harmful excessive voltage. If you complete all the steps correctly, updated the computer will work faster and better, and will last another few years.