Patent ID: 8351802

Claim:
An image forming apparatus capable of performing a plurality of controlling operations, said image forming apparatus comprising: a detachable replaceable part having an information storing unit that stores first information; an information reading unit that reads said first information from said information storing unit; a comparison unit that compares said first information read by said information reading unit and second information; a determining unit that determines whether said replaceable part is a genuine part or not, based on a comparison result provided by said comparison unit; and a control unit that determines a controlling operation among said plurality of controlling operations based on a determination by the determining unit; wherein when said determining unit determines that said replaceable part is a genuine part, said control unit performs an operation that maintains printing quality, and said control unit performs a printing operation; and wherein when said determining unit determines that said replaceable part is not a genuine part, said control unit does not perform said operation that maintains printing quality.