13-12-2012, 06:01 PM
Power Supply
Power Supply.ppt (Size: 635.5 KB / Downloads: 27)
Purpose of the Power Supply
Convert household power into a form the computer can use.
Provides power to every device in the computer.
The Power Supply converts AC (alternating current) which is external power to DC (direct current) internal power that the computer can use.
Link to AC/DC Voltage Conversion Information
How Computer Work Video (Old Version) – video clip on the power supply.
Household Power and Problems
Household Power – the external power source that comes into the wall.
Power Problems that may lead to power supply problems.
Line Noise
Surges
Lightening strikes
Brownouts
Blackouts
Line Noise
Line Noise - Line noise consists of small variations in the voltage level delivered to the computer. Noise that the power supply cannot handle can cause it to malfunction and pass the problem on to your motherboard or other internal devices
Lightening Strike
Enormous amount of electricity involved in a storm, a strike near your PC--near meaning within several miles--can induce currents in metal objects.
Any wire that comes in from the outside and attaches to your PC can become a conduit for a pulse of destructive energy such as a telephone line or power cord.