Patent ID: 7274885

Claim:
An image forming device, comprising: a replaceable photoconductive drum unit; a replaceable developing unit; and a controller, which includes: a first determination processing unit, which determines whether or not the photoconductive drum unit has reached a replacement timing; a second determination processing unit, which determines a replacement timing of the developing unit in accordance with usage performance data of the developing unit; a third determination processing unit, which determines whether or not the developing unit is within a prescribed value of the replacement timing of the developing unit but has not yet reached the replacement timing of the developing unit, when the first determination processing unit determines that the replacement timing of the photoconductive drum unit has been reached; and a display control unit, which displays an announcement of the replacement timing of the photoconductive drum unit and the developing unit in accordance with a determination result of the second determination processing unit, when the third determination processing unit determines that the usage performance data of the developing unit is within the prescribed value.