Flow Of Printing Data; Data Flow - Dell 3010CN Service Manual

5. Flow of printing data

5.1 Data flow

Printing data (electric signal) output from printer controller becomes the printed image following
the flow shown below.
Reference Forming 2 dimensional printed image
When the image is scanned by turning ON/OFF the laser beam according to electric signal
output from printer controller (VIDEO signal: expresses image data by rise or fall of
voltage), a dot image for a line is formed.
When the above mentioned scanning is carried out for 1 screen of an image, a single color
image (2 dimensional dot image) is formed. To obtain a full color image, a 2 dimensional
dot image must be formed for each of the 4 colors.
Resolution is determined by the following points.
Main scanning direction: Number of dots/inch
Sub scanning direction: Number of scanning lines/inch
Paper feeding direction
Host (electric signal)
Printer controller (electric signal)
ROS ASSY (laser beam)
Electrostatic latent image on drum
(invisible image)
Toner image on drum (toner image)
Toner image on belt
(intermediate transfer belt)
Toner image on paper
Printed image on paper
Number of dots/inch
6 - 34
Chapter 6 Principle s of O peration
Leg_Sec06_033FB
Number of scanning
Leg_Sec06_034FA
lines/inch