| 摘要 |
An input password entered from a keyboard is compared and collated with a registered password in a provisional state before power supply is started to main body operation units. In operation, each of the input and the registered passwords may include characters, numerals and marks entered through input operations on a keyboard 3. A keyboard/power supply controller 4 compares and checks an input password from the keyboard 3 with the password registered in the memory 9. If both match with each other, the keyboard/power supply controller 4 controls a DC/DC converter 6 to start the supply of power to the main body operation units (LCD 7, CPU 8, memory 9) Otherwise, the keyboard/power supply controller 4 controls a DC/DC converter 6 to suspend the supply of power to the main body operation units.
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