Copy Process; General Description Of Copying Process - Toshiba e-STUDIO167 Service Manual

3.

COPY PROCESS

3.1

General Description of Copying Process

( 2 )
Data reading(scanning)
CIS
600 dpi,7084 pixel
Image processing
(1) Charging: Applies negative charge on the
surface of the photoconductive drum.
(2) Data reading: The images on the original
are converted into electrical signals.
(3) Data writing: The electrical signals are con-
verted into light signal (laser emission)
which exposes the surface of the photo-
conductive drum.
(4) Development: Negatively-charged toner
adheres to the photoconductive drum and
forms visible image.
(5) Transfer bias: Improves transfer efficiency.
(6) Transfer: Transfers the visible toner image
on the photoconductive drum onto paper.
© February 2007 TOSHIBA TEC CORPORATION All rights reserved
( 10 )
Discharging
Discharge LED (red)
Wavelength 660nm x10pcs
( 1 )
Charging
e-STUDIO167/207:-448V
e-STUDIO237 :-454V
(grid voltage)
( 3 )
Data writing
Semiconductive laser
Pw=4.0 nJ/mm 2
( 4 )
Development
Magnetic roller
Bias -340VDC+AC
Fig. 3-1
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3 - 1
Paper exit
( 8 )
Fusing
Lamp heating method
564W x2
( 9 )
Cleaning
Blade method
( 7 )
H -107 µADC
C -107 µADC
L
( 6 )
H
C
L
Transfer bias
( 5 ) DC
Bypass feeding
Toner
( 100 sheets )
Carrier
Drawer feeding
( 250 sheets )
PFU
( 250 sheets )
(7) Separation: Separates paper with the toner
image from the photoconductive drum.
(8) Fusing: Fuses the toner image onto the
paper by applying heat and pressure.
(9) Cleaning: Scrapes off the residual toner
from the drum.
(10) Discharging: Eliminates the residual nega-
tive charge from the surface of the photo-
conductive drum.
Separation
-70 µADC
Transfer
340 µADC
369 µADC
282 µADC
+565V
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e-STUDIO167/207/237
COPY PROCESS
3