Transfer Roll Cartridge Assy & Fuser; Major Functions - Brother HL-4000CN Service Manual

5.7 Transfer Roll Cartridge ASSY & Fuser
5.7.1

Major functions

Fuser ASSY
The fuser ASSY fixes toner which was transferred onto the paper but not fixed by the
heat and pressure and feeds paper before and after being fixed.
The fuser ASSY mainly consists of the following parts:
Exit sensor
Detects passage of print after fixed based on the change of position of the
actuator.
Transfer roll cartridge unit ASSY
The transfer roll cartridge unit ASSY consists of a transfer roll cartridge and a waste
toner recovery system.
The transfer roll cartridge is opposed to the IDT 2 in the print head cartridge ASSY and
transfer the toner image on the IDT 2 onto the paper.
Fan fuser
The fan fuser exhausts the heat of fuser ASSY to prevent inside temperature from
overheating.
Heat roll
Heater lamp
Thermostat
Temp sensor
III-33
Belt unit
Roll ASSY exit
Exit sensor