Brother HL-2400C Service Manual page 60

3 Developing
The developing process means that an electrostatic latent image on the OPC belt is
made visible by depositing toner onto the exposed areas of the OPC belt.
(1) Structure of the Toner Cartridge (Refer to Fig.4-8 & 4.14.)
i) The toner cartridge is located as shown in Fig.4-8.
ii) Four toner cartridges are made available from the top to bottom in the order
black, yellow, magenta and cyan.
iii) Each color toner is loaded in the corresponding toner cartridge.
(2) Process of Developing (Refer to Fig.4-8, 4-14, 4-15, and 4-16)
i) Toner adheres to the developer roller of the toner cartridge.
Developing is processed by this roller contacting the OPC belt surface.
ii) The developer roller has been biased to the potential -DBV(V). Fig.4-15
describes the relationship established between the potential of the toner, the
potential -V
on the exposed area of the OPC belt.
iii) Developing is processed by the toner adhering to the OPC belt due to the
attraction between the potential of the toner and the potential -VR(V) on the
exposed area of the OPC belt. A visible Toner image is formed on the OPC
belt.
iv) No developing takes place on the non-exposed area because the potential of
the toner and that of the OPC belt is the same polarity and therefore repel each
other.
OPC Belt
Develper roller
Toner
Toner
(V) at the non-exposed area of OPC belt and the potential -VR(V)
0
Fig.4-14
IV-12