Patent ID: 8301041

Claim:
An image forming apparatus comprising: a storage unit that stores information; a first control unit that reads from the storage unit and writes information into the storage unit; a first power source unit that supplies power to the first control unit; an image forming unit provided with a load for forming an image; a second control unit that controls the image forming unit; a second power source unit that supplies power to the load and the storage unit; a switch unit that is operated to power on or off the image forming apparatus, the switch unit transmitting a status signal instructing power-on or power-off to the first control unit and the second control unit, wherein the first control unit, upon receiving the status signal instructing power-off, performs a process to shut down operation of the storage unit and transmits a shutdown instruction to shut down an operation of the load to the second control unit, and the second control unit, even if the shutdown instruction from the first control unit is not received when the status signal instructing power-off has been detected, performs control to stop the operation of the load and then stop the supply of power from the second power source unit.