Control Of Toner Cartridge; Adjustment During A Print Job; Adjustment After End Of Printing; Near-End Detection - Epson AcuLaser CX11 Service Manual

EPSON AcuLaser CX11/CX11F
5.

Adjustment during a print job

Toner in the HOUSING ASSY-DEVE is consumed as print jobs are processed. To
obtain consistent image quality during printing, toner must be supplied to the
HOUSING ASSY-DEVE. The following control is performed to supply
appropriate amount of toner.
PCDC (Pixel Count Dispense Control)
The amount of toner that will be consumed is predicted from the count value
of the image data, that is input from the controller, to control the toner supply
amount to the Developer. The supply amount is controlled according to the
Toner Dispense time.
6.

Adjustment after end of printing

When a total of 20 or more sheets have been printed, the image quality
adjustments in 1) to 4) are repeated after completion of printing.
Toner Cartridge
Dispense
MOT ASSY MAG
Clutch
Auger
Developer Assy
ROS ASSY
Figure 2-55. PCDC Mechanism
OPERATING PRINCIPLES

Control of Toner Cartridge

7.

Near-End Detection

Counts the operating time of the Dispense Clutch that operates to supply toner
from the cartridges, and causes a Near-End warning when the counted time
exceeds the prescribed value.
8. Detection of Empty status
The judgement of the Empty status of Toner Cartridges is made based on toner
patch density values (read by ADC sensor). When toner patch density is extremely
low, the printer executes forced supply of toner (Admix operation), and it judges
that the cartridge is empty if the density of toner patches created after the forced
supply is still low.
9. Reset of the Empty status
The printer judges that the empty Toner Cartridge is replaced with a new one when
the power is turned off and back on, and the cover is opened and then closed
during the Empty status. Then the printer executes forced supply of toner from the
newly attached cartridge.
(MCU PWB)
Leg_Sec06_062FB
Printer Section Operating Principle
Revision B
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