Fuser Unit; Paper Exit Section - Toshiba 1550 Service Manual

12.2 Explanation of Operation
Cleaning blade
Discharge brush
Upper exit roller
Lower exit roller
Paper exit switch
A. Fuser unit
This unit applies heat and pressure to the copy paper separated and transported from the drum to fix
the toner image to the paper. The upper and lower rollers are rotated under a fixed pressure (pro-
vided by spring force) by the drive from the main motor. The upper roller has a heater lamp inside it
and is rotated by the drive from the main motor but the heater lamp does not rotate.
Both the upper and lower rollers are always pressed against each other by spring force while the
upper unit is closed. But when the upper unit is raised, they are released from the pressure.
The copy paper which has finished being fixed is separated smoothly from the upper heat roller with
the aid of the separation claws. The temperature detection section functions to control the tempera-
ture of the upper roller (by means of a thermistor) and when it detects an abnormally high tempera-
ture, the power supply to the heater lamp is shut off (by means of a thermostat).
B. Paper exit section
The upper and lower exit rollers are rotated through gears by the drive from the fuser unit. The copy
paper which has finished the fixing process is smoothly exited onto the copy tray through the upper
and lower exit rollers.
The paper exit switch functions to detect whether or not the copy paper is properly exited onto the
copy tray.
1550/1560 FUSER
Cleaning felt roller
Heater lamp
Lower heat roller
Separation claw
12 - 2
Thermostat
Upper heat roller
Thermistor
Mar. 1998 © TOSHIBA