FIELD: image forming devices.
SUBSTANCE: image forming apparatus which is capable of preventing unnecessary replacement of the toner cartridge when replacing the drum portion. Toner cartridge supplies toner. Drum part uses toner supplied from the toner cartridge as a lubricating material when the drum part performs the first operation after installation. Toner cartridge and drum part are detachably mounted. Imaging device detects a value indicative of the remaining amount of toner stored in the toner cartridge and a value, which indicates the remaining life of the drum portion. When the value indicating the remaining life is not greater than the specified threshold value, the replacement of the drum part is notified. Content of the notification is changed according to the value indicating the remaining amount of toner stored in the toner cartridge.
EFFECT: discloses are an image forming device capable of preventing unnecessary replacement of a toner cartridge, a method of controlling said toner cartridge and a data medium.
8 cl, 7 dwg
