Development Control: Detection Methods - Epson ColorPage EPL-C8000 Service Manual

EPSON EPL-C8000

2.7.7.5 Development Control: Detection Methods

1. Toner Cartridge detection
The Cartridge Sensor detects the Toner Cartridges at the detection
positions. A photo sensor, it detects reflected light from a Toner
Cartridge and determines the following:
Reflection: Toner Cartridge has been installed.
No reflection: Toner Cartridge has not been installed.
2. Toner Cartridge (new/old) detection
The Used Cartridge Sensor detects the Toner Cartridge (new/old) at
the detection position. In the trickle development method, used
developer is collected in the collection chamber in the Toner
Cartridge. A reflection seal is pasted on the wall of the collection
chamber. As the developer is collected, the seal is covered with
developer; it does not reflect light. The Used Cartridge Sensor is a
photo sensor and detects reflected light from the collection chamber
of the toner cartridges.
Reflection: Toner cartridge is still new.
No reflection: Toner cartridge is old. (Used carrier is collected.)
3. Toner Cartridge (no toner) detection
The No Toner status is detected by the process control.
The following shows the No Toner Detection flow, No Toner Reset
flow, and Toner End of Life Warning Reset flow.
Chapter 2 OPERATING PRINCIPLES
(a) No Toner Detection flow
(b) No Toner Reset flow
Rev. B
2-58