Toner Control - Xerox Phaser 6360 Service Manual

Theory of Operation

Toner Control

2-14
Toner Cartridge presence is detected by a combination of the Toner Sensor
Actuator and CRUM Reader. Presence of toner in the cartridge is detected by
the No Toner Sensor. These sensors are provided for each toner color
(CMYK), and detection is made for each individually.
No Toner Sensor
The No Toner Sensor located on each Toner Cartridge Holder checks one
color every 3.5 seconds, requiring 14 seconds to detect all four colors. The
sensor detects toner as it's dispensed from the toner cartridge into the auger
tube.
To prevent false errors resulting from toner obscuring the sensor, a film
attached near the auger in the Toner Cartridge Holder cleans the sensor
surface whenever toner is dispensed. False errors related to toner detection
are avoided by the printer's internal Toner Presence Control.
Toner Presence Control
1. Checks for toner presence when the power is turned on, or after a door is
opened and closed. Checks every 14 seconds when printing.
2. The "Replace [CMYK] Toner Cartridge" error displays when the counter
on the Customer Replaceable Unit Monitor (CRUM) indicates that the
toner is empty.
3. The "Replace Toner Cartridge" error displays when the No Toner Sensor
detects that a cartridge is empty.
4. When a new Toner Cartridge is installed prior to receipt of a "Replace
Toner Cartridge" error, toner is dispensed for 1.7 seconds. At the next
toner presence control sampling, if the No Toner Sensor detects toner
present, all Toner "Warnings", and "Errors" are reset. When toner is
dispensed and the No Toner Sensor detects toner present three or more
times consecutively, the controller regards this status as "Toner Present".
5. If the No Toner Sensor does not detect toner, toner is dispensed for 1.7
seconds again 5 seconds later. If toner present is not detected after
executing toner dispense three times and if Toner Cartridge dispense time
is 0, the "Remove Ribbon From 'x' Cartridge" error displays.
Phaser 6300/6350/6360 Color Laser Printer Service Manual