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