Imaging Unit - Samsung CLX-9350ND Service Manual

2.5 Image creation
This section describes the image creation process use
2.5.1 Printing process overv
This color printing system includes the LSU with four la
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 station
The OPC drum [A] is charged with a negative voltage
from the LSU (Laser Scanning unit) [B]. The light prod
discharging on the surface of the OPC drum. The neg
image due to an electric field. The toner (real image) o
the positive bias applied to the first transfer roller [C].
paper by a positive charge applied to the second trans b iti h
Process Steps
1. OPC drum charge: The Charge Scorotron gives th
2. Laser exposure: Light produced by a laser diode h
3. Development: This machine uses a dual-compone
negatively charged toner to the latent image on the
imaging units (one for each color).
4. Transfer:
a. First transfer: The first transfer rollers opp
the transfer belt. Four toner images are super
b. Second transfer: The transfer roller transfer
Service Manual
CLX-9250/9350 series
2. Product d
view
M M
beams for color printing. Each Imaging unit consists
ns are: yellow, cyan, magenta, and black.
duced by the laser creates a latent image by
gatively charged toner is attracted to the latent drum
li d t th d t sfer roller [E].
he drum a negative charge.
hits the charged OPC through the lens and mirrors.
ent development system. The magnetic roller carries
posite the OPC drums transfer toner from the drums to
rs the toner from the transfer belt to the media.
2-3
description
ed by the printer.
C C
aser beams, four imaging units, ITB unit and transfer
and Black (from left to right as shown in the diagram).
t has an OPC drum, Charge Scorotron, Eraser and t has an OPC drum Charge Scorotron Eraser and
by the Charge Scorotron and is exposed by the light
on each OPC drum is moved to the transfer belt by
All four toners (color image) are transferred to the
f ll [E]
e drum surface. This machine uses four independent
r-imposed onto the belt.
30
Paper path
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