Patent ID: 8769324

Claim:
A power supply control device comprising: a mode switching controller that switches to one of at least an ordinary mode, in which power is received from a commercial power source and the power is the maximum supply capacity, a first sleep mode, in which a lower power than in the ordinary mode is the supply capacity, and a second sleep mode in which power consumption is less than that of the first sleep mode; a first power supply section that supplies power from the commercial power source, and that is electrically coupled to a specific control system and supplies power to the specific control system in the first sleep mode; a second power supply section that supplies power from the commercial power source, and that shuts off a supply of power during the first sleep mode; an electricity storage device that is electrically coupled to the specific control system separately from the first power supply section and, during the first sleep mode, supplies power to the specific control system; a wiring system opening and closing unit that is provided at a downstream side relative to a power switch that shuts off the power supply from the commercial power source, the wiring system opening and closing unit setting a power supply wiring system from the commercial power source to an open state or a closed state without regard to whether the power switch is on or off; a power controller that turns on the first power supply section and turns off the second power supply section during the first sleep mode when a predetermined duration has been passed after a job has been completed during the ordinary mode; a reading section that reads an amount of electrical energy stored in the electricity storage device during the first sleep mode; a determination section that determines whether the electricity storage device stores an amount of electrical energy which maintains a sleep mode with a power which is supplied only from the electricity storage device while shutting down the commercial power source, based on the read amount of stored electrical energy; an electricity storage device output controller that turns on an output of the electricity storage device when the determination section has made an affirmative determination; and a controller that turns off the wiring system opening and closing unit to turn off the first power supply section to switch to the second sleep mode when the determination section has made the affirmative determination wherein during the second sleep mode, the specific control system is supplied with power only from the electricity storage device.