Brother MFC-9420CN, Service Manual

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Confidential 3 - 7
3.2.1 Print System and Transfer System
Fig.3-8 shows the basic structure of the print system having the OPC belt as the main part and the
transfer system having the transfer drum as the main part. Color printing is made by actuating the
each process in the print system and transfer system.
4 cycles of actions 1 to 6 are required to form a full 24 bit color image on the transfer drum, only one
cycle of actions 7, 8 and 9 is required to transfer the image to the paper from the transfer drum ready
for fixing by actions 10 and 11.
1 Chargimg
2 Exposing
4 First Transfer (Transfer Belt)
OPC Belt
3 Developing
Transfer Belt
5 Belt Discharge
6 OPC Belt Cleaning
7 Second Transfer(Paper)
9 Paper Dischanging
8 Transfer Cleaning
10 Fusing
Paper Exit
Print System
Transfer System
Transport System
K C M Y
K C M Y
K C M Y
K C M Y
Fig. 3-8