| 摘要 |
<p>PROBLEM TO BE SOLVED: To turn off a main power source without destroying data in a disk by one switch operation by shutting down an OS(operating system) in term of software when a power switch comes into an off state through the use of a LATCHING type as the power switch. SOLUTION: When a power switch 1 is in an off state, a system main power switch 11 of a LATCHING type is turned on to start A/D converting operation of a power unit 8 to output only +5 VS. Then, a power on signal 29 is made into a high state and a power off signal 27 is made into a low state. In this state, at the time of making the switch 1 in the on state, the signal 29 and the signal 27 are made low and when the switch 1 is made into an off state, the OS of a picture recorder 31 is shut down in terms of software.</p> |
