December 2000 © TOSHIBA TEC
3 - 1
1600/2000/2500 COPYING PROCESS
3. COPYING PROCESS
3.1 Copying Process
Charging: Negatively charges the surface of
the photosensitive drum.
Original exposure: Images are converted to
optical signals.
Scanning: Image optical signals are con-
verted to electrical signals.
Printing: Image electrical signals are con-
verted to optical signals (for laser emission)
and exposed on the photosensitive drum.
Development:
toner adheres to the sur-
face of the photosensitive drum and forms a
visible image.
Transfer bias: Increases transfer efficiency.
Transfer: Transfers the visible image from the
drum onto the transfer (copy) sheet.
Separation: Separates the transfer sheet,
along with the toner, from the drum
Fixing: Fixes the toner on the transfer sheet
by applying heat and pressure.
Cleaning: Mechanically removes any remain-
ing toner on the drum.
Discharger LED array: Discharges any re-
maining charge from the drum.
03001
Fig. 3-1-1
1
2
3
4
5
6
7
8
9
10
11
Scanning
Image processing
CCD
600DPI (7450 pixels)
Orignal exposur
Xenon lamp
14 W : 1900 V rms
for DP1600 series
1250 V rms
for DP2000/2500 series
Fixing
Heat roller
100V: 900W x 1
200V: 400W x 1
500W x 1
Paper exit
Cleaning
Discharger LED array
Wavelength 660 nm x 15
Charger
-637 V DC
for DP1600 series
Printing
Semiconductor laser
Pw = 3.5 nJ/mm
2
Toner
Carrier
Development
Magnetic roller
Bias -430 V DC
+150 V DC
for DP1600 series
Paper cassette
(550 sheets)
Paper feed unit
(550 sheets : Option)
Paper feed pedestal
(550 sheets : Option)
Sheet feed bypass
(100 sheets : Option)
Guide bias
+375 V DC
Transfer
H : 5.5 KV
C : 5.2 KV
Separation
H : -4.3 KV
C : -4.1 KV
L : -3.9 KV
Cassette module
(550 sheets : Option)
for DP2000/2500 series
Large capacity feeder
(1250 x 2 sheets : Option)
for DP2000/2500 series
Bias -460 V DC
+150 V DC
for DP2000/2500 series
-674 V DC
for DP2000/2500
series
Charger
Summary of Contents for DP1600
Page 1: ...DIGITALPLAINPAPERCOPIER DP1600 2000 2500 File No 31100011 R0111216600 TTEC ...
Page 2: ...Copyright 2000 TOSHIBA TEC CORPORATION ...
Page 232: ...1600 2000 2500 PCB BOARD 16 2 December 2000 TOSHIBA TEC 16 2 PWA F RLY 16 02 01 ...
Page 233: ...December 2000 TOSHIBA TEC 16 3 1600 2000 2500 PC BOARD 16 3 PWA F PIF 16 03 01 ...
Page 237: ...17 WIRE HARNESS CONNECTION DIAGRAMS 17 1 ...
Page 264: ...1 1 KANDA NISHIKI CHO CHIYODA KU TOKYO 101 8842 JAPAN ...