Basic Structure Of The Printing System - Brother HL-3450CN Service Manual

CHAPTER 4 STRUCTURE OF SYSTEM COMPONENTS
1.4.2

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
iii) The developer roller of the toner cartridges is biased to -DBV (V) by the power
iv) The frame potential of the transfer drum is GND.
Paper Discharger
ACHV
Transfer Roller
THV (+)
THV ( - )
a corona is generated as the result.
supply DBV.
Fusing Unit
Transfer Drum
Paper
Cleaning Unit
FCBV
OPC Belt
Cleaning
Brade
Erase Lamp
Fig. 4-9
4-10
Toner
Toner Cartridge
K
Develop
Y
M
DBV
C
CBV
Scanner Unit
Charger
Po
CHV
ZDV