Brother DCP-8085DN Service Manual page 67

(4) Transfer
By applying a minus charge to the transfer roller, the toner adhered to the exposure drum is
transferred to paper.
Develop roller
Exposure drum
Toner
Memo :
• Control of transfer bias
The transfer bias applied in the transfer roller is adjusted according to types and
sizes of paper so as to keep excellent image quality.
Supply roller
Transfer roller
Fig. 2-27
2-29
Toner cartridge
Confidential