3
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e-STUDIO555/655/755/855
COPY PROCESS
3 - 1
3. COPY PROCESS
3.1
General Description
Fig. 3-1
(1) Charging:
Negatively charges the surface of the
photoconductive drum.
↓
(6) Transfer:
Transfers the visible image on the
photoconductive drum onto paper.
Separation:
Separates the paper from the drum
together with the toner.
↓
(2) Original exposure:
Converts images on the original into optical
signals.
↓
(7) Fusing:
Fuses the toner onto the paper by applying
heat and pressure.
↓
(3) Scanning:
Converts image optical signals into
electrical signals.
↓
(8) Brush cleaning:
Cleans dirt and paper dust on the drum.
↓
(4) Writing:
Converts image electrical signals into
optical signals (laser emission) and
exposes them to the surface of the
photoconductive drum.
↓
(9) Blade cleaning:
Forcibly removes the residual toner on the
drum.
↓
(5) Development:
Makes the negatively-charged toner
adhere to the photoconductive drum and
forms a visible image.
↓
(10)Discharging:
Discharges any remaining negative charge
on the drum.
Scanning
CCD
600 dpi,7500 pixel
(3)
Original exposure
Xenon lamp
29W
(2)
Image processing
Bypass feeding
Discharge
LED array
(Wavelength 660nm x14pcs)
-500V(-300V~-900V)
(10)
Drawer feeding
LCF feeding
Fusing
Discharging
Fuser roller
700~1450W
(4)
Writing
Semiconductive laser
Pw=3.9 nJ/mm
2
(555/655)
Pw=3.0 nJ/mm
2
(755/855)
(9)
(1) Charging (grid voltage)
Bias
-394V(-200~-800)DC+AC
5 µA
(5)
(6)
(7)
Development
Magnetic roller
Transfer/Separation
Cleaning brush + Blade
Blade cleaning
(8)
Brush cleaning
Toner
Carrier
70 µA (555/655/755)
85 µA (855)