| 摘要 |
PROBLEM TO BE SOLVED: To make information surely stored in the storage means of an interchangeable unit by starting the storage of information in a non-volatile storage means when a specified time has passed after a unit operation detection means detected unit exchanging operation. SOLUTION: When a specified time has passed after both 1st and 2nd door switches 121 and 122 detected operation (door opening) to exchange a removed toner unit, a control part 1 starts the writing (storage) of recorded information in the non-volatile memory 114. Thus, an erroneous writing of the recorded information caused by the omission of a clock caused when noise produced from equipment using 24 V voltage such as a motor 23 and a high-voltage output part 26 is overalid on an EEPROM writing clock or the transformation of data caused when the noise is overlaid on EEPROM writing data when a door is opened is avoided. A user is accurately can be informed of the life of the photoreceptor drum 100 of the interchangeable removed toner unit 113 and a removed toner amount. |
