1600/2000/2500 COPYING PROCESS
3 - 4
December 2000 © TOSHIBA TEC
(5) Development
• “Developing” is the process of converting the
electrostatic latent image to an image visible
to the human eye.
The developing agent is fed to the surface of the photosensitive drum by the magnetic rollers, and
impressed on the rollers. Toner in the developer agent attaches to areas on the photosensitive drum
having a potential lower than the developer bias (reverse developing method).
• Switching of developing bias polarity
Fogging is reduced by switching the bias of negative voltage charged areas to positive
polarity
(approx. +150V).
• About Developing Agent
Toner and carrier are mixed. The toner is
charged to minus polarity, and the carrier is
charged to plus polarity by friction caused by
stirring.
Toner:
Comprises plastic and Magnetite.
Carrier: Ferrite
0
100V
200V
300V
460V
or
430V
600V
Intermediate tones
Black solid
White background
White background
Image is not developed
by bias potential.
Bias
voltage
When the
potential
of the photosensitive
drum is higher than the
developer bias:
When the
potential
of the photosensitive
drum is lower than the
developer bias:
03009-a
Magnetite
(40 ~ 65%)
Resin
(35 ~ 60 %)
[Toner]
[Carrier]
Ferrite
5 ~ 20 µm
Approx. 60 µm
Image is developed by
toner.
Drum
Sleeve roller
03008
03009
Magnet
Toner
Carrier
(Always attracted
on to the magnet)
Bias voltage
-460V or -430V
Sleeve
Fig. 3-2-7
Fig. 3-2-9
Fig. 3-2-8
Fig. 3-2-10
Содержание DP1600
Страница 1: ...DIGITALPLAINPAPERCOPIER DP1600 2000 2500 File No 31100011 R0111216600 TTEC ...
Страница 2: ...Copyright 2000 TOSHIBA TEC CORPORATION ...
Страница 21: ...1600 2000 2500 OUTLINE OF THE MACHINE 2 8 December 2000 TOSHIBA TEC B 2 Switches SW2 SW1 02 02 04 ...
Страница 23: ...1600 2000 2500 OUTLINE OF THE MACHINE 2 10 December 2000 TOSHIBA TEC C 1 Motors M1 M3 M5 M7 M6 M4 M2 02 02 06 ...
Страница 145: ...8 PRINTING 8 1 8 1 General Description 8 1 8 2 Structure 8 2 8 3 Laser Diode 8 6 8 4 Disassembly and Replacement 8 7 ...
Страница 231: ...December 2000 TOSHIBA TEC 16 1 1600 2000 2500 PC BOARD 16 BOARD ASSEMBLY 16 1 PWA F MAN 16 01 01 ...
Страница 232: ...1600 2000 2500 PCB BOARD 16 2 December 2000 TOSHIBA TEC 16 2 PWA F RLY 16 02 01 ...
Страница 233: ...December 2000 TOSHIBA TEC 16 3 1600 2000 2500 PC BOARD 16 3 PWA F PIF 16 03 01 ...
Страница 234: ...1600 2000 2500 PCB BOARD 16 4 December 2000 TOSHIBA TEC 16 4 PWA F PNL 16 5 PWA F VR 16 04 01 16 05 01 ...
Страница 236: ...1600 2000 2500 PCB BOARD 16 6 December 2000 TOSHIBA TEC 16 7 PWA F FUS ASD AUD CND TWD SAD models 16 07 01 ...
Страница 237: ...17 WIRE HARNESS CONNECTION DIAGRAMS 17 1 ...
Страница 264: ...1 1 KANDA NISHIKI CHO CHIYODA KU TOKYO 101 8842 JAPAN ...