Patent ID: 8145075

Claim:
An image-forming apparatus comprising: a counter configured to count a value concerning image formation each time that the image-forming apparatus performs the image formation; a cartridge detector configured to determine the presence or absence of a toner cartridge; a reader configured to retrieve data from a memory device in the toner cartridge; and a controller configured to exercise one of two types of control over units of the image-forming apparatus, wherein a first type of control conformable to a toner cartridge other than a genuine toner cartridge is exercised when the cartridge detector determines that the toner cartridge is present if the following conditions are satisfied: the value counted by the counter is greater than a predetermined value and the reader has failed retrieval of predetermined data; while otherwise, a second type of control conformable to the genuine toner cartridge is exercised, wherein the second type of control is exercised for a genuine toner cartridge without a memory device supplied together with the image-forming apparatus.