Konica Minolta bizhub 211, Руководство по обслуживанию

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Theory of Operation Ver. 1.0 Apr. 2007 5. Copy process
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Outline
5. Copy process
[1]
Photoelectric
Conversion
• A CCD sensor is used to convert the image data represented by light
reflected off the original to a corresponding electric signal which, in turn,
is output to the IR image processing section.
[2]
IR Image
Processing
•
The analog electric signal is converted to an 8-bit digital image
signal (A/D conversion) which, in turn, goes through appropriate
corrections before being output to the PH image processing
section.
[3]
PH Image
Processing
•
After going through corrections, the digital image signal is con-
verted to a corresponding electric signal (D/A conversion), with
which the laser is turned ON or OFF as necessary.
[4]
PC Drum
•
Made up of an aluminum pipe coated with a photoconductive
layer, on which an electrostatic latent image is formed.
[5]
Drum Charging
•
A uniform negative DC charge is deposited across the entire
surface of the PC Drum.
[6]
Laser Exposure
•
The laser beam strikes the surface of the PC Drum, forming an
electrostatic latent image.
[7]
Developing
• Toner negatively charged in the Developer Mixing Chamber is
attracted onto the electrostatic latent image changing it to a vis-
ible, developed image.
•
A developing bias (Vb) is applied to the Developing Roller to
prevent toner from being attracted onto those areas of the PC
Drum which correspond to the background areas of the original.
[8]
Paper Feed
•
Paper is supplied from the paper feed tray.
[9]
Image Transfer
•
A DC positive charge is applied to the Image Transfer Roller to
transfer the visible image on the surface of the PC Drum onto
the paper.
A08EE568AA
[1] Photoelectric
Conversion
[2]
IR Image
Processing
[3]
PH Image
Processing
[4]
PC Drum
[5]
Drum Charging
[6]
Laser Exposure
[7]
Developing
[8]
Paper Feed
[9]
Image Transfer
[10]
Paper Separation
[11]
Cleaning
[12]
Main Erase
[13]
Fusing
[14]
Paper Exit