When a power switch (160) detects an external input and thus outputs an ON/OFF signal, a power control unit (170) switches the supply/block states of the driving power supplied from the power unit (150). If the power unit (150) is switched from the block state to the supply state, a mode-control counter 171 updates a counter value and outputs the counter value as a mode-control signal. An identification unit (195) identifies the mode number of the operation mode to be set, based on the mode-control signal. A process determining unit (197) reads out the control content according to the corresponding operation mode of the mode number from an ROM (180) to determine the process for each unit. A control unit (190) performs the process determined by the process determining unit (197) and starts the control of the operation of each unit.
