Imitatingthe power supply unit which with personal computer"PC/AT " of the IBM corporation is used, and that, it is the power supply unit which was made.PC/AT in the type which had becomethe foundation of the present standard personal computer, the design and structure etc. of the part spread as a standard. Also AT power source at the one of them, was adopted withmany PC/ATcompatible machines. As for the terminal of AT power source with 6 pin ×2, as for supply voltage it corresponds to ±5V and ±12V. It utilizes,it is necessary for the motherboard to correspond to AT power source.As for AT power source because it is not the standard which is defined clearly, at every manufacturer you can see the difference in form size output voltage and the like. After that because the ATX power source which appears spreads, presently it is not used. ... The continuation is readIn order directly to connect wiringof the powerswitch to power source, like ATX power source on & offof power sourcecannot do with AT power source, in order from the motherboard. Because of that in the computer which usesAT power source, after
shutting down the system, it is necessary to turn off power source by hand. In addition, because it is not possible,to manage the electric power which is supplied from the motherboard you cannot usepower saving function such as stand-by and sleep.
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