Xero - Epson EPL-N3000 Service Manual

EPSON EPL-N3000/AcuLaser M4000N

2.5.4 XERO

IMAGING CARTRIDGE
The Imaging Cartridge, an Imaging Cartridge also called the CRU (Customer
Replaceable Unit), consists of the following five major components:
Drum:
An aluminum cylinder with the surface coated with photoconductive material. The
photoconductive property of the drum allows the drum surface to hold electrical
charge while in darkness, and discharge it when exposed to the light.
BCR (Bias Charge Roll):
Places uniform electrical charge on the drum surface to erase the electrical patterns
of reduced charge remaining from the last print cycle.
Magnet Roll:
Holds toner on the surface in the form of a thin layer, and conveys toner into the
gap between the drum and the Magnet Roll. Toner is supplied to the Magnet Roll
by the Agitator in the Toner Compartment.
CM Blade (Charging and Metering Blade):
Spreads toner on the Magnet Roll in the form of a thin layer, and gives negative
charge to the toner by friction charging.
Cleaning Blade:
Scrapes the residual toner from the drum surface after the transfer step.
BTR ASSY
The BTR of the BTR ASSY, which is in contact with the Drum of the Imaging
Cartridge, is driven by the Drum Gear.
When the paper moves between the BTR and the Drum, the BTR applies positive
charge to the back side of the paper. The positive charge on the back side of the paper
attracts the negatively charged toner image from the drum surface and transfers it onto
the front side of the paper.
Operating Principles
IMAIGING CARTRIDGE
Functions of Major Components
Figure 2-26. Major Components of the XERO
Revision C
BTR ASSY
JG6119EA
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Confidential