Maintenance and maintenance of microcomputer power supply

Generally speaking, when the computer is working properly, the sound is very small, in addition to the hard disk read and write data emitted by the sound, mainly the cooling fan sound, especially the switching power supply fan emits the loudest. Some switching power supply after long-term use, in the work will produce some noise, mainly due to the power supply fan rotation caused by the poor. Causes the power supply fan to turn not smooth to emit the noise the reason many, mainly concentrates in the following several aspects:

--The fan motor bearing sleeve produces axial deviation, causing the fan blade to be stuck or grazing, emitting a "dodo" sound.

--fan motor bearings loose, so that the blade in the rotation of the "hum" sound.

--Fan motor axial movement, due to the wear and tear of the gasket, axial gap increased, after the electricity issued "dodo" voice.

--The fan motor bearing used in the poor quality lubricants, at low ambient temperature easily with the dust into the fan bearing condensation together, increasing the motor rotation resistance, so that the motor issued a "buzz" sound.

If the fan is not working properly, it may burn the motor for a long time, causing damage to the whole switching power supply. For the above Power fan sound reasons, usually need to do the following maintenance work. The Power box is the easiest place to assemble dust, if the power supply fan issued a larger voice, generally every six months to remove the fan, cleaning the dust and add some lubricating oil, simple maintenance. Because the power supply fan is sealed in the power box, disassembly is not convenient, so be sure to pay attention to the operation method.

　　Split fan

First disconnect the host power, unplug the power behind the input, output line plug. Then unplug and connect all the accessories connected to the power supply, remove the mounting screws from the power box and remove the Power pod. Observe the appearance structure of power box, remove the screws reasonably and accurately, remove the housing. When you take the cover, you pry the wires out of the gap at the same time. Remove the four screws from the fixed fan, remove the fan, and suspend the two power cords.

　　Cleaning accumulate dust

Use cardboard to isolate the Power circuit board and fan, you can use a little brush or wet cloth dust, wipe clean. You can also use a fur tiger to blow up dust in fan blades and bearings.

　　Add Lubricating Oil

The

rips off the sticker and picks out the rubber seal with a beak clamp. Find the motor bearing, one side with lubricating oil, while using the hand to move the fan, so that the lubricating oil along the bearing evenly inflow, generally add a few drops. Pay attention to whether the fan of ball bearing has two bearings, do not ignore the bearing oil to the wind surface, oil not only on the spindle. Lubricants must be used for the use of computer-specific lubricants or advanced light sewing machine oil, must not be used in general automotive lubricants. Finally put on a rubber seal, labeled.