Specifications

EPSON EPL-N1600 Chapter 2 Operating Principles
Rev. A 49
which is
g
enerated by convertin
g
the current
flowin
g
throu
g
h the monitorin
g
Photodiode (PD)
inte
g
rated in the LD into an analo
g
output
volta
g
e by means of a resistor.
Scanner Motor Control:
The Poly
g
on Mirror is rotated by the Scanner
Motor (also called ROS Motor). The Scanner
Motor is driven at a constant speed by the
Scanner Motor Drive Circuit usin
g
a phase-
locked loop (PLL).
Mirror ASSY: The Mirror Assembly consists of Mirror M1,
Shutter and PWBA SOS.
Mirror M1:
Reflects the laser li
g
ht beam from the ROS to
the Drum.
PWBA SOS:
Generates a SOS (Start of Scan) si
g
nal. The
laser beam hits a photosensor on the PWBA
SOS at the be
g
innin
g
of each scan, and the
PWBA SOS
g
enerates a pulse si
g
nal (/SOS).
The /SOS si
g
nal is used as the reference timin
g
si
g
nal for
g
eneratin
g
LINE SYNC si
g
nal.
Shutter Mirror:
The Mirror Assembly has a Shutter Mirror (A)
coverin
g
or exposin
g
the Mirror M1 and lens of
the SOS Sensor. When the Cover Assembly
Exit is open, a projection of the Cover pushes
down the crank arm of the Shutter to raise the
Shutter and expose the Mirror M1 and lens of
the SOS Sensor. When the Cover Assembly
Exit is open or the Mirror Assembly is removed,
the Shutter covers the Mirror M1 and lens of the
SOS Sensor to prevent them from collectin
g
dust.
Ima
g
in
g
Cartrid
g
e The Ima
g
in
g
Cartrid
g
e is composed of followin
g
components.
Drum:
An aluminum cylinder with a coatin
g
of
photoconductive material on the surface. The
photoconductive coatin
g
(layer) holds an
electrical char
g
e placed on the surface while in
darkness, and allows the char
g
e to flow throu
g
h
into the conductive layer when exposed to laser
li
g
ht.
BCR (Bias Charge Roll):
Places a uniform electrical char
g
e on the drum
surface, erasin
g
any patterns of decreased
char
g
e remainin
g
from the previous cycle.
Magnet Roll:
Holds toner on the surface in a thin layer and
transports it to the
g
ap between the drum and
the Ma
g
net Roll. Toner is supplied to the
Ma
g
net Roll from the Toner Compartment.
CM Blade (Charging and Metering Blade):
Spreads toner on the Ma
g
net Roll in a thin layer,
and also
g
ives toner a ne
g
ative char
g
e.
Cleaning Blade:
Scrapes the toner remainin
g
after the Transfer
step off of the Drum surface.