Toshiba 4560, Service Manual

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Nov. 1997 © TOSHIBA 3 - 1 4560/4570 PROCESS
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3. COPYING PROCESS
3.1 Copying Process
Halogen lamp
Original exposure
300 W
–705V ±5 V
Charging
1.8W x 9 lamps
Discharge lamp
Cleaning
LED eraser array
63 LEDs
Paper exiting
Fixing
Heat roller
Separation
1 kHz
Transfer
–5.76 kV DC
Black development
Sheet-bypass feeding
(50 sheets)
LCF feeding
(1500/4000 sheets)
Cassette feeding (upper
/lower/PFP)(600 sheets)
Transfer bias
–1200 V DC
Optical section
Toner
Carrier
Magnetic roller
Bias: –150 VDC
900 W (115V)
1100W (220/240V)
6 Separation : Separates the transfer sheet,
along with the toner, from the
drum.
7 Fixing : Fixes the toner on the transfer
sheet by applying heat and
pressure.
8 Cleaning : Mechanically removes any re-
maining toner on the drum.
9 Discharge lamp : Discharges any remaining
charge from the drum.
1 Charging : Negatively charges surface of
the photosensitive drum.
2 Exposure : Forms an electrical image on
the drum.
3 Development : toner adheres to surface of
photosensitive drum and forms
a visible image.
4 Transfer bias : Increases transfer efficiency.
5 Transfer : Transfers the visible image
from the drum onto the transfer
(copy) sheet.
AC 4.15 kV
+DC325V