Toner Cartridge Life Control - Konica Minolta magicolor 8650 Service Manual

12. Toner supply section
12.3.2

Toner cartridge life control

A. Toner cartridge detection/new unit detection timing
• Detection is controlled by confirming the data of each unit with access to TC EEPROM
board when the front door is closed.
• Based on the data, the machine confirms if the cartridge is mounted or not.
• After detecting the presence of the cartridge, with the data machine checks if the car-
tridge is new or not.
B. Toner empty detection control
• A toner empty condition can be divided into 3 groups: normal, near-empty, empty
• Normal: Remaining number of prints that can be produced is over 1000.
• Near-empty: Remaining number of prints that can be produced is up to 1000.
• Empty: Toner remaining level is 0.
C. Toner near-empty detection control
• When new toner is set, toner remaining level is set to TC EEPROM board. Based on the
remaining level, the machine calculates and gives subtraction of the toner replenishing
amount from the hours which the toner replenishing motor has turned. When the level
reaches the given amount of toner remaining, toner near-empty warning is displayed.
D. Toner empty control
• After a near-empty condition is detected, at every T/C ratio detection timing, the toner
density detected by the TCR sensor is compared with the target toner density to calcu-
late a difference in density. The count number defined according to each density differ-
ence is added, and when the value reaches the given level, toner empty warning is
displayed.
E. Near empty display
• The warning screen to be displayed when a toner near-empty is detected can be enabled
or disabled in the Toner Near Empty in the System Settings in the Service Mode.
• When the warning screen display is set to "ON", the message notifying the user that the
toner cartridge needs replacing soon is displayed. Printing can be continued even after
the message appears (Default setting).
• When the warning screen display is set to "OFF", the message notifying the user that the
toner cartridge needs replacing soon is not displayed. Printing can be continued without
having the message displayed.
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Theory of Operation Ver. 2.0 Nov. 2007
A02ET2C582AA
Toner cartridge/K
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Toner cartridge/Y,M,C