Patent ID: 8786872

Claim:
An image forming apparatus comprising: a plurality of process members configured to form an image; and a control unit configured to control a supply state of power for the process members, wherein the control unit is configured to: a) shift the supply state of power to a first state in which power is supplied to each of the plurality of process members, and the plurality of process members perform an image forming operation according to a first image forming instruction, b) after completion of the image forming operation, shift the supply state of power from the first state to a second state in which the supply of power to a first process member in the plurality of process members is stopped and the supply of power to a second process member in the plurality of process members, different from the first process member, is continued, c) when a second image forming instruction is received during a shift of the supply state of power from the second state to a third state in which the supply of power to the second process member is also stopped, shift the supply state of power from the second state to the first state without shifting to the third state, wherein the plurality of process members perform an image forming operation according to the second image forming instruction, and d) shift the supply state of power from the second state to the third state when the second image forming instruction is not received during the shift of the supply state of power from the second state to the third state.