Brother HL-2400C - Basic Structure of the Printing System

IV-8
1.1.2 Basic Structure of the Printing System
A toner image is formed through the potential of the OPC belt varying in each of the
charger, exposure, development, transfer and cleaning processes.
(1) Process of Print System (See Fig.4-9.)
i) The OPC belt is biased to the voltage -CBV(V) by the power supply CBV.
ii) A negative high voltage is applied to the charger unit by the power supply CHV,
and a corona is generated as the result.
iii) The developer magnetic roller of the toner cartridges is biased to -DBV(V) by
the power supply DBV.
iv) The frame potential of the transfer drum is GND.
Paper Discharger
ACHV
Transfer Roller
THV (+)
THV ( - )
Fuser Unit
Transfer Drum
Paper
Cleaning
Burush
FCBV
OPC Belt
Erase Lamp
Cleaning
Blade
CHV
ZDV
Charger
Po
Scannerl Unit
CBV
Y
Develop
M
C
K
Toner Cartridge
Toner
DBV
Cleaning Unit
Fig.4-9
No. Function Power Supply (P/S)
P/S Name Approx.Output Voltage
1 Charging CHV(-) 4.6KV
HVRD6190 619V
2 First Transfer CBV(-)
200V
∼
900V
3 Developing Y,M DBV(-A)
200V
∼
400V
Bias C,K DBV(-B)
200V
∼
400V
4 Second Transfer THV(+)
400V
∼
3,000V
5 Transfer Roller Cleaning THV(-) 600V
6 Paper Discharging
ACV(
∼
)
4.9KV
DCV(+) 200V
7 Drum Cleaning FCBV
200V
∼
1,500V