Copy Process; General Description Of Copying Process - Toshiba e-STUDIO453 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
(4)
(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
converted into light signal (laser emission)
which exposes the surface of the photocon-
ductive drum.

(5) Development: Negatively-charged toner
adheres to the photoconductive drum and
forms visible image.

© 2003 - 2008 TOSHIBA TEC CORPORATION All rights reserved
(11) Discharging
Discharge LED (red)
Wavelength 660nm x14pcs
(1) Charging
–790V
(grid voltage)
Data writing
Semiconductive laser
2
Pw=4.3 nJ/mm
(5)
Development
Magnetic roller
Bias –550VDC
+150VDC
Fig. 3-101
(6) Transfer bias: Improves transfer efficiency.
(7) Transfer: Transfers the visible toner image
(8) Separation: Separates paper with the toner
(9) Fusing: Fuses the toner image onto the pa-
(10) Cleaning : Scrapes off the residual toner
(11) Discharging : Eliminates the residual nega-
3 - 1
Paper exit
(9)
Fusing
Inductionheating (IH) method
700~1240W
(10)
Cleaning
Blade method
(8)
Separation
ACH
C
L
DC
1kHz
(7)
Transfer
H 286 uA
C 286 uA
L 137 uA
Transfer bias
(6) DC+580V
Bypass feeding
Toner
(100 sheets)
Carrier
Drawer feeding
(upper/lower)
(550 sheets)
PFP (upper/lower)
(550 sheets) or
LCF
(1250 sheets x 2)

on the photoconductive drum onto paper.

image from the photoconductive drum.

per by applying heat and pressure.

from the drum.

tive charge from the surface of the
photoconductive drum.
e-STUDIO350/352/353/450/452/453
5.5kV
4.0kV
2.5kV
-100V
COPY PROCESS
3