Konica Minolta magicolor 1690MF Service Manual - Page 68
Toner cartridge detection and new cartridge detection timing
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magicolor 1680MF magicolor 1690MF COMPOSITION/ OPERATION Theory of Operation Ver. 1.0 Nov. 2008 12. Developing section 12.3.5 Developing system • The machine employs the single-component, non-contact developing system. • In the non-contact, single-component developing system, the magnetic brush does not rub the surface of the photo conductor (or the image). This prevents a foggy image from occurring and the photo conductor from being worn. Developing roller Photo conductor 4139to2063e2 12.3.6 Toner cartridge (TC) life control A. Toner cartridge detection and new cartridge detection timing • The machine attempts to perform a detection sequence when the front door is closed. B. Toner cartridge detection • The machine accesses the TC detection board (CSIC) to check for data stored in it. Using that data, the machine determines whether or not a toner cartridge is loaded. C. New Toner cartridge detection • After a toner cartridge has been detected, the machine determines whether it is new or not based on the data acquired. D. Toner cartridge near empty and empty condition detection • The amount of toner consumed is calculated from the number of dots produced for one printed page by the controller. A toner near empty condition and a toner empty condition are thereby detected. • The machine determines that there is a toner near empty condition when the image counter and dot counter reach the life value. • The machine determines that there is a toner empty condition when a predetermined number of printed pages are produced after the toner near empty condition has been detected. 41