Image Creation Process - Develop QC 2235 Plus Service Manual

Image creation process

5. Image creation process
[1] Photoelectric Conversion
[2] IR Image Processing
[11] Transfer
Belt Cleaning
[3] Printer Image Processing
Photoelectric
[1]
Conversion
IR Image
[2]
Processing
Printer Image
[3]
Processing
[4] PC Drum
[5] PC Drum Charging • A negative DC charge layer is formed on the surface of the PC Drum.
[6] LED Exposure
[7] Developing
[8] 1st Image Transfer
[9] 2nd Image Transfer
QC 2235plus Theory of Operation Ver.1.0 Feb. 2004
[8] 1st Image Transfer
[4] PC Drum
[7] Developing
[6] LED Exposure
• The light reflected off the surface of the original is separated into different
colors using the color filters (R, G, and B); CCD then converts it into a cor-
responding electric signal and outputs the signal to the IR Imaging Pro-
cessing Section.
• The electric signal is converted to 8-bit digital image signals. After going
through some corrections, video signals (C, M, Y, and Bk) are output to
the Printer Image Processing Section.
• The video signals (C, M, Y, and Bk) go through some corrections. Follow-
ing digital-to-analog conversion, these signals are used for the control of
the intensity level of the LED.
• The image of the original projected onto the surface of the PC Drum is
changed to a corresponding electrostatic latent image.
• The surface of the PC Drum is irradiated with LED light and an electro-
static latent image is thereby formed.
• The toner, agitated and negatively charged in the Developer Mixing Cham-
ber, is attracted onto the electrostatic latent image formed on the surface of
the PC Drum. It is thereby changed to a visible, developed image.
• AC and DC negative bias voltages are applied to the Developing Roller,
thereby preventing toner from sticking to the background image portion.
• A DC positive voltage is applied to the backside of the Transfer Belt,
thereby allowing the visible, developed image on the surface of each of
the PC Drums (Y, M, C, and Bk) to be transferred onto the Transfer Belt.
• A DC positive voltage is applied to the backside of the paper, thereby
allowing the visible, developed image on the surface of the Transfer Belt to
be transferred onto the paper.
1-8
[10] Paper Separation
[9] 2nd Image Transfer
[12] PC Drum Cleaning
[13] Main Erase
[5] PC Drum Charging