Patent ID: 7822354

Claim:
An image forming apparatus capable of switching between a normal mode and a power save mode, comprising: a controller unit for communicating with an external device and processing print data to create deployed data; an operation unit for performing a mechanical operation of the image forming apparatus; a first detection unit for detecting a first status of the image forming apparatus; an operation control unit disposed in the operation unit for receiving the deployed data from the controller unit and controlling an operation of the operation unit, said operation control unit monitoring a change in an output of the first detection unit in the normal mode; an operation unit power source for supplying power to the operation unit in the normal mode; a monitoring unit disposed in the controller unit for directly monitoring a change in the output of the first detection unit in the power save mode without the output passing through the operation unit; and an information processing unit disposed in the controller unit for controlling the operation unit power source to stop supplying power to the operation unit in the power save mode.