Copy Process; General Description Of Copying Process - Toshiba e-STUDIO200L Service Manual

3.

COPY PROCESS

3.1

General Description of Copying Process

( 2 )
Original exposure
Xenon lamp
16W
( 3 )
Data reading(scanning)
CCD
600 dpi,7400 pixel
Image processing
(1) Charging: Applies negative charge on the
surface of the photoconductive drum.
(2) Original exposure: Converts images on the
original into optical signals.
(3) Data reading: The optical signals are con-
verted into electrical signals.
(4) Data writing: The electrical signals are con-
verted into light signal (laser emission)
which exposes the surface of the photo-
conductive drum.
(5) Development: Negatively-charged toner
adheres to the photoconductive drum and
forms visible image.
(6) Transfer bias: Improves transfer efficiency.
© 2004 - 2008 TOSHIBA TEC CORPORATION All rights reserved
( 11 )
Discharging
Discharge LED (red)
Wavelength 660nm x14pcs
( 1 )
Charging
-495V
(grid voltage)
( 4 )
Data writing
Semiconductive laser
Pw=4.0 nJ/mm 2
( 5 )
Development
Magnetic roller
Bias -357VDC+AC
+150VDC
Fig. 3-1
(7)
(8)
(9)
(10)
(11)
3 - 1
Paper exit
( 9 )
Fusing
Lamp heating method
564W x2
( 10 )
Cleaning
Blade method
( 8 )
Separation
H -109 µADC
C -109 µADC
L -77 µADC
( 7 )
Transfer
H 418 µADC
C 445 µADC
L 310 µADC
Transfer bias
( 6 ) DC +600V
Bypass feeding
Toner
( 100 sheets )
Carrier
Drawer feeding
( upper/lower )
( 550 sheets )
PFP ( upper/lower )
( 550 sheets ) or
LCF
( 1250 sheets x 2 )
Transfer: Transfers the visible toner image
on the photoconductive drum onto paper.
Separation: Separates paper with the toner
image from the photoconductive drum.
Fusing: Fuses the toner image onto the
paper by applying heat and pressure.
Cleaning: Scrapes off the residual toner
from the drum.
Discharging: Eliminates the residual nega-
tive charge from the surface of the photo-
conductive drum.
e-STUDIO200L/202L/203L/230/232/233/280/282/283
3
COPY PROCESS