Brother MFC-9420CN Service Manual page 52

6 Belt Cleaning
OPC belt cleaning process means that the residual toner adhering to the OPC belt surface is
mechanically scavenged.
(1) Structure of belt cleaning
Blade for the OPC belt cleaning is located to the belt cartridge as shown in Fig.3-9.
(2) Process of OPC belt cleaning (Refer to Fig.3-21.)
1) There is a residual toner on the OPC belt as it has not been transferred in the process
of first transfer.
2) Residual toner is mechanically scavenged by the blade edge.
3) The scavenged residual toner is collected in the waste toner pack by the waste toner
feeder.
OPC Belt
OPC Belt
Discharging
First Transfer
(Erase Lamp PU)
Fig. 3-21
3 - 1 8
OPC Belt Cleaning
(Brade)
Confidential