Toshiba e-STUDIO2500c, Руководство по обслуживанию, Страница: 82 / 402

e-STUDIO2500c/3500c/3510c COPY PROCESS May 2006 © TOSHIBA TEC
3 - 2
3.2 Details of Copying Process
Fig. 3-3
(1) Charging: Places a negative charge on the
surface of the photoconductive drum.
(6) 1st transfer: Transfers the visible image
(toner) on photoconductive drum to the
transfer belt.
(2) Original exposure: Converts images on the
original into optical signals.
(7) 2nd transfer: Transfers the visible image
(toner) on the transfer belt to paper.
(3) Data reading: The optical image signals are
read into CCD and converted into electrical
signals.
(8) Fusing: Fuses the toner image to the paper
by applying heat and pressure.
(4) Data writing: The electrical image signals
are changed to light signals (by laser emis-
sion) which expose the surface of the photo-
conductive drum.
(9) (+) Discharging: The conductive recovery
blade eliminates the (+) charges on the pho-
toconductive drum applied during the trans-
fer stage.
(5) Development: Negatively-charged toner is
made to adhere to the photoconductive
drum, producing a visible image.
(10) Blade cleaning: While scraping off the resid-
ual toner from the drum by the blade.
(11) (–) Discharging: Eliminates the residual (–)
charge from the surface of the photocon-
ductive drum.
20 W
CCD
Pw=4.0 nJ/mm 2
-600V (-300 to -1200V)
-400V (-200 to -900V) DC
1100V / 7.5 to 10Hz AC
600W x 2 + 300W x 1
Carrier
Toner
Wavelength 660nm x 24pcs.
(-) Discharging (LED array)
Cleaning
-1000 V
(+) Discharging (Recovery blade)
Paper exit
1st transfer
1400V (400 to 4000V)
2nd transfer
(+) 1350V (+2000 to -6000V)
(-) -1150V
Photocon-
ductive drum
Data reading (scanning)
600dpi, 7450 pixels
Original exposure
Xenon lamp
Image processing
Data writing
Semiconductor laser
Magnetic roller bias
Black development
Charger (grid voltage)
Fusing
Hearter lamps
Bypass feeding
Drawer feeding
PFP/LCF feeding
8
7
2
3
4
1
11
9
6
5
10