MINOLTA-QMS magicolor 6100 Series Service Manual page 69

magicolor 6100 Series Service Manual
4.2.3.3 Developing
Developing is defined as a process to develop the electrostatic latent
images that have been transferred onto the OPC belt by using toner.
4.2.3.3.1
4.2.3.3.2
Structure of the Toner Cartridge
(see Fig. 4-8)
Toner cartridge is located as shown in Fig. 4-8.
Four toner cartridges are used. The order of the toner car-
tridges from top to bottom is black, yellow, magenta and
cyan.
Process of Developing
(see Fig. 4-8, and Fig. 4-14 to Fig. 4-16)
Toner adheres to the developer roller of the toner cartridge.
Development occurs when the developer roller contacts the
OPC belt surface.
The developer roller has been biased to the potential -DBV.
Fig. 4-14 shows the relationship established between the
potential of the toner, the potential -Vo at the non-exposed
area of OPC belt and the potential -VR at the exposed area of
OPC belt.
Potential of the exposed area is positive relative to the poten-
tial of the toner. Therefore, toner is attracted to the OPC belt,
where the development takes place.
Potential of the unexposed area has the same polarity as the
toner. Therefore, the toner is repelled by the surface of the
OPC belt, where no development takes place.
Dev .roller
(-CBV)+(-DBV)
Ton er
(-CBV)
O P C B e l t
DBV
CBV
Fig. 4-14
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