Epson Aculaser 2600 Series, Service Manual

Page: 91 / 454

EPSON AcuLaser C2600/2600 Revision B
Operating Principle Print Process 91
2.1.3.3 Development Process
In the development process, toner is electrically applied to a pattern of electrical
charges (an electrostatic image) on the drum to form a visible image on it.
PRINCIPLE OF DEVELOPMENT
†
Rotary Development System
This printer employs the Rotary Development System, which rotates a wheel
composed of four toner and developer units (toner cartridges) to set the units into
position one-by-one to develop the electrostatic image with one color at a time.
†
Single Component Noncontact Development System
The toner used for the printer is one component type and nonmagnetic. To produce
negative electrostatic charge on the toner, the toner is rubbed against the
development roller which is negatively charged by the HVPS. Then the toner
jumps the gap between the roller and the photoconductor drum by being attracted
to the electrostatic image on the drum because the image is charged positively in
comparison with the other part on the drum. This system, which transfers toner to
the drum without mechanical contact, is called noncontact developing system.
Figure 2-7. Principle of Development
02000801
Developer Unit (Toner cartridge)
Photoconductor Drum
Developer
Roller
Supply Roller
Developing
Voltage Supply
Toner Storing
Space
Developing
Space
Control Blade
02000901
Position Time
Potential on the Photoconductor Drum
Potential on the De
v
elopment Roller
Image Area
Other than
the Image
Area Other than
the Image
Area Other than
the Image
Area
Image Area
Developing
Bias (DC)
Developing
Bias
DC
DC + AC