Epson AcuLaser Color 2000, Service Manual

Page: 74 / 204

EPSON AcuLaser C2000 Revision C
Operating Principles Printing Process 74
For printing, the printer rotates the toner cartridge rack to shift the
respective toner cartridge to the developing position in Y, M, C, K order.
Figure 2-14. Toner Cartridge Rack
Toner Cartridge Developing Position
Each toner cartridge developing position is precisely determined and
preserved by the rack motor. Stepping motor is used for rack motor to
control the rack rotational angle precisely.
†
Black toner starting position
„
Turn on the rack motor and the rack starts free rotation.
„
When the rack black position detection sensor (PC6) is turned on,
stops rack motor.
„
Counter-rotate the developing motor.
„
Rotate the developing motor and adjust the rack to the developing
position.
†
Each color toner starting position
„
Respective YMC toner starting position is precisely determined by
controlling the number of rotation.
„
Turn on the rack motor and rotates the rack 90 degree to the next
toner.
„
Stops the rack motor.
„
Counter-rotate the developing motor.
„
Regular-rotate the developing motor to adjust the rack to the
developing position.
Toner Cartridge Rack
Toner Cartridge
Rotational
Direction
Photoconductor Drum
Y
BK
M
C
2
1
3
Table 2-5. Toner Cartridge Rack
No. Name Explanation
1
Rack black position
detection sensor and light-
proof plate Sensor and light-proof plate detects that the
rack black toner is at the developing
position.
2
Toner empty detection
sensor window Toner of the toner cartridge detects empty.
3
Toner color rib Rib determines the toner color when
installing the toner cartridge to the rack.