Patent ID: 7088017

Claim:
A power supply control device comprising: a shutoff detector unit configured to detect a shutoff signal; a switch unit operatively connected to each of an AC power supply, a DC power supply, and the shutoff detector unit, the switch unit configured to be manually placed in one of a first state and a second state, the switch unit, while in the first state, being configured to electrically connect the AC power source to the DC power supply, and the switch unit, while in the second state, being configured to electrically disconnect the AC power source from the DC power supply and to send the shutoff signal to the shutoff detector unit; and a shutoff processing section operatively connected to the shutoff detector unit and configured to protect a memory in an image forming apparatus based on the detected shutoff signal, wherein the DC power supply is configured to convert an AC voltage from the AC power supply to a DC voltage and to apply said DC voltage to the image forming apparatus, and wherein said shutoff processing section is further configured to invalidate all errors detected in the image forming apparatus after the shutoff signal is detected.