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41388601TH Rev.2 40 /
Unit Name
I/D
Toner Cartridge
Belt Unit
Fuser Unit
Condition
The number of drum revolutions is counted in the unit of letter
paper length + paper interval in continuous printing.
End of Life: Time when a distance equivalent to pages of 26K is
printed (on 3P/J).
The number of dots printed is counted. The used amount is
determined based on the counter value (See Section 2.16).
End of Life: Time when a toner-low error occurs.
The number of turns revolutions is counted in the unit of letter
paper length + paper interval in continuous printing.
End of Life: Time when the counter value reaches 80K.
One is counted every time when one page is passed.
End of Life: Time when the counter value reaches 80K.
Action
Warning (the unit can still be used).
Do not use the unit anymore.
Warning (the unit can still be used).
Warning (the unit can still be used).
2.14 Version Read of Periodically Replaced Units
The condition (new or used) of the I/D, fuser unit and belt unit are determined by an internal fuse
within the units. When the unit is powered on or the upper cover is opened and closed, the
printer scans for consumables fuses. If a conducting fuse is found, that unit's counter is reset
and the fuse is opened. The life counters of the consumables are checked at each power on
and each closing of the upper cover. Once a fuse is opened the consumable is judged used.
2.15 Life Counter for Replaceable Units
Each life of the periodically replaced units - I/D, fuse unit and belt unit is counted as shown in the
following table:
2.16 Toner Consumption Detection
The used toner amount is detected by counting the number of dots printed.
The counting starts after toner-low is released. The sum of the counted values is stored in
EEPROM. When toner-low is detected, the amount used is forcedly set to 7%.
When the equivalent of pages of 1K on A4 and 5% duty is reached after that, toner-empty is
detected.