Reaching End Of Life; Toner Cartridge (Tc) Life Control - Xerox Phaser 6120 Service Manual

There is a fuse inside the Imaging Unit and upon first use the life counter detects the
blown fuse and resets.
The image stabilization sequence is carried out upon detection of a new imaging unit.

Reaching End of Life

The life counter is reset when a new Imaging Unit is detected.
The machine gives a warning message when the life value is reached (printing will be
continued). When the waste toner inside the Imaging Unit reaches its full level, the
initiation of any new print cycle will be prohibited. The machine then prompts the user to
replace the Imaging Unit.

Toner Cartridge (TC) Life Control

Toner Cartridge Detection and New Cartridge Detection Timing
The machine attempts to perform a detection sequence when the Front Door is closed.
Toner Cartridge Detection
The machine accesses the TC Detection Board (CSIC or CRUM) to check for data stored in it.
Using that data, the machine determines whether or not a Toner Cartridge is loaded.
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 from the CRUM.
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.
[CMYK} LOW
The machine determines that there is a toner near empty condition when the image counter
and dot counter reach the life value.
[CMYK] EMPTY
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.
Phaser® 6120 Color Laser Printer Service Manual
Print Engine Theory of Operation
7-7