Read Sharp AR-810 (serv.man24) Service Manual online
AR-651/810 COPY PROCESS 3 - 1
3. COPY PROCESS
3. 1. General Description
(1) Charging: Negatively charges the surface of the
OPC drum.
훹
(2) Original exposure: Converts images into optical
signals.
훹
(3) Scanning: Converts image optical signals into
electrical signals.
훹
(4) Writing: Converts image electrical signals into
optical signals (laser emission) and exposes
them to the surface of the OPC drum.
훹
(5) Development: Makes the negatively-charged
toner adhere to the photoconductive drum and
forms a visible image.
훹
(6) Transfer: Transfers the visible image on the
OPC drum onto the paper.
Separation: Separates the paper from the drum
together with the toner.
훹
(7) Fusing: Fuses the toner on the paper by applying
heat and pressure.
훹
(8) Fur brush cleaning: Cleans dirt and paper dust
on the drum.
훹
(9) Blade cleaning: Forcibly removes the residual
toner on the drum.
훹
(10) Discharging: Discharges any remaining
negative charge on the drum.
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Image processing
Charging
-733V (grid voltage)
Original exposure
Xenon lamp
29W
Scanning
CCD
600dpi, 7500pixel
Writing
Semiconductor laser
Development
Magnetic roller
Bias -500VDC+AC
Pw=3.8nJ/mm
2
Bypass feeding
Cassette feeding
LCF feeding
Transfer/Separation
80µA
Cleaning brush + Blade
5µA
Fusing
Fuser roller
Discharging
Fur brush cleaning
Blade cleaning
Discharging
LED array (wavelength 660nm x 16)
Toner
Carrier
700~1450W
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