Sony C9000 Version Read of Periodically Replaced Units, Life Counter for Replaceable Units

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:

Unit Name	Condition	Action
I/D	The number of drum revolutions is counted in the unit of letter	Warning (the unit can still be used).
	paper length + paper interval in continuous printing.
	End of Life: Time when a distance equivalent to pages of 26K is
	printed (on 3P/J).
Toner Cartridge	The number of dots printed is counted. The used amount is	Do not use the unit anymore.
	determined based on the counter value (See Section 2.16).
	End of Life: Time when a toner-low error occurs.
Belt Unit	The number of turns revolutions is counted in the unit of letter	Warning (the unit can still be used).
	paper length + paper interval in continuous printing.
	End of Life: Time when the counter value reaches 80K.
Fuser Unit	One is counted every time when one page is passed.	Warning (the unit can still be used).
	End of Life: Time when the counter value reaches 80K.

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.

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