| 摘要 |
The AC power input to a power supply of a computer is controlled by a switch located in a keyboard. The circuit comprises a switch(20) for on/off control of input power, a decoder(10) for generating a power on/off control signal according to a switch status and a system control instruction input through a keyboard, a logic unit(30) for operating output signal of the decoder(10), and a relay(50) for controlling input AC power.
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