Developing - Epson AcuLaser CX11 Service Manual

EPSON AcuLaser CX11/CX11F

DEVELOPING

At the "Developing" process, toner is electrically applied to the invisible electrostatic
latent image on the drum, to form a visible image on it.
This printer uses two developing systems: a "rotary developing system" that
successively rotates four Developer Assys, and a "trickle developing system" that
uses developers composed of two components, a carrier and toner.
Developer in the Developer Assy is stirred by a spiral-shaped stirrer called
"Auger", and is supplied to the Magnet Roll located near the drum surface. The
developer is charged by the friction of stirring (toner: negative charge, carrier:
positive charge), and the charges are electrically attracted each other.
As the carrier is a magnetic body, it is attracted to the magnetized Magnet Roll,
and a uniform layer of carrier is formed on the Magnet Roll by passing through a
Trimmer Blade.
A minus voltage is applied to the Magnet Roll together with AC voltage from the
HVPS.
As the electrostatic latent image on the drum that is formed by exposure is charged
positively compared to the other sections on the drum, the toner charged
negatively on the Magnet Roll is attracted only to the image sections on the drum.
OPERATING PRINCIPLES Printer Section Operating Principle
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Figure 2-9. Development Process (1)
Revision B
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