Details Of Each Process - Brother HL-3450CN Service Manual

CHAPTER 4 STRUCTURE OF SYSTEM COMPONENTS
1.4.3

Details of each process

1
The charging process ensures that the OPC belt is evenly charged by the charger system.
(1) Structure of the charger unit (Refer to Fig.4-8 and Fig.4-11)
i) The charger unit is located as shown in Fig.4-8.
ii) The charger unit consists of the case, corona wire and grid.
iii) The charger unit charges the OPC belt surface to the potential -V
iv) The charger unit has the grid controlled to the constant voltage ZD (V) for even
(2) Process of charging (Refer to Fig.4-12.)
i) The status of the OPC belt surface before charging is -CBV (V).
ii) The charger unit charges the OPC belt surface evenly to -V
Charging
corona charge.
charging.
negative charge.
Corona wire
Grid
ZD
CBV CHV
Fig. 4-11
Case
Cleaning
(Blade)
4-12
(V) with the
0
(V) by generating a
0
-V
0
Charging
Fig. 4-12