Print System And Transfer System - Brother MFC-9420CN Service Manual

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.
Print System
Transfer System
Transport System
1 Chargimg
2 Exposing
3 Developing
OPC Belt
4 First Transfer (Transfer Belt)
Transfer Belt
7 Second Transfer(Paper)
9 Paper Dischanging
10 Fusing
Paper Exit
6
K C M Y
5
K C M Y
K C M Y
K C M Y
8
Fig. 3-8
3 - 7
OPC Belt Cleaning
Belt Discharge
Transfer Cleaning
Confidential