13. Toner supply section
Theory of Operation Ver. 8.0 Jun. 2008
6
6
Composition/Operation
13.3.2
Toner cartridge life control
A. Toner cartridge detection/new unit detection timing
• Individual cartridge detection is controlled by means of accessing the data of EEPROM
board when the front upper door is closed or the power switch is turned ON.
• 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.
13.3.3
Toner cartridge life control
• The amount of toner remaining in the cartridge is displayed as the four states, normal,
toner cartridge near empty, toner cartridge empty, and sub hopper empty.
• Normal: The number of pages that can be printed is 7,000 or more.
• Toner cartridge near empty: The number of pages that can be printed is less than 5,000-
7,000.
• Toner cartridge empty: No toner remains in the toner cartridge.
The number of pages that can be printed is less than 1,400.
• Sub hopper empty: The machine stops printing.
A. Toner cartridge 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 the toner near empty detection timing. When the
hours for which the toner cartridge motor has turned at the low speed exceeds a prede-
termined period of time and the sub hopper toner empty sensor continuously detects
toner empty 10 times or more, the toner near empty warning is displayed.
A00JT2C042AA
A00JT2C040AA
Remaining toner amount
Description
Normal
Enough toner remains in the toner cartridge and the sub hopper.
(Low speed replenishment)
Toner cartridge near
empty
Low speed replenishment cannot supply the required amount of toner to the
sub hopper within a certain time. (Switch to the high speed replenishment)
Toner cartridge empty
Even high speed replenishment cannot supply the required amount of toner
to the sub hopper within a certain time.
Sub hopper empty
Toner inside the sub hopper is running out and the T/C ratio in the develop-
ing unit is becoming lower than the threshold.
Theory of Operation Y107522-3
