Samsung CLX-9250ND - Imaging Unit

2. Product
d
2.5 Image creation
2.5.1 Printing process over
v
This section describes the image creation process us
e
M
M
This color printing system includes the LSU with four l
a
unit. The 4 imaging units are: Yellow, Magenta, Cyan
a
This machine uses four Imaging units, and four laser
b
of a Drum unit and Development unit Each Drum unit
of
a
Drum
unit
and
Development
unit
.
Each
Drum
unit
Cleaning blade. From the left, the Imaging unit statio
n
The OPC drum [A] is charged with a negative voltage
from the LSU (Laser Scanning unit) [B]. The light pro
d
discharging on the surface of the OPC drum. The ne
g
image due to an electric field. The toner (real image)
o
the positive bias applied to the first transfer roller [C].
bitih lidtth dt
paper
b
y a pos
iti
ve c
h
arge app
li
e
d
t
o
th
e secon
d
t
ran
s
Process Steps
1. OPC drum charge: The Charge Scorotron gives t
h
2. Laser exposure: Light produced by a laser diode
h
3. Development: This machine uses a dual-compon
e
negatively charged toner to the latent image on th
e
imaging units (one for each color).
4. Transfer:
a. First transfer: The first transfer rollers op
p
the transfer belt. Four toner images are supe
r
Service Manual
CLX-9250/9350 series
2-
3
b. Second transfer: The transfer roller transfe
r
d
escription
v
iew
e
d by the printer.
C
Paper path
C
a
ser beams, four imaging units, ITB unit and transfer
a
nd Black (from left to right as shown in the diagram).
b
eams for color printing. Each Imaging unit consists
t has an OPC drum Charge
Scorotron
Eraser and
t
has
an
OPC
drum
,
Charge
Scorotron
,
Eraser
and
n
s are: yellow, cyan, magenta, and black.
by the Charge Scorotron and is exposed by the light
d
uced by the laser creates a latent image by
g
atively charged toner is attracted to the latent drum
o
n each OPC drum is moved to the transfer belt by
All four toners (color image) are transferred to the
fll[E]
sf
er ro
ll
er
[E]
.
h
e drum a negative charge.
h
its the charged OPC through the lens and mirrors.
e
nt development system. The magnetic roller carries
e
drum surface. This machine uses four independent
p
osite the OPC drums transfer toner from the drums to
r
-imposed onto the belt.
SAMSUNG ELECTRONICS
3
0
r
s the toner from the transfer belt to the media.