Fuser Unit / Paper Exit Section; General Description; Operation - Toshiba e-STUDIO350 Service Manual

13. FUSER UNIT / PAPER EXIT SECTION

13.1 General Description

Toner is fused by applying heat and pressure on the transferred image on the paper which is transported
to the fuser unit. The paper is then transported to the receiving tray, paper exiting options or ADU. The
fuser unit consists of the IH coil, fuser roller, pressure roller, separation fingers, cleaning roller, ther-
mistors, thermostat, exit roller, exit sensor, etc.
Exit roller
Exit sensor
Separation finger
Thermostat
13
Cleaning roller
Thermistor IH coil
Fuser roller
Pressure roller
Fig. 13-101

13.2 Operation

The fuser roller is pressed with the spring force from the pressure roller side, and is rotated by the main
motor drive. Then the paper transported to the fuser unit is hold between the fuser roller and pressure
roller and the toner is fused on the paper with heat and pressure. After this, the separation fingers
separate the paper from the fuser roller or pressure roller. Then the paper is transported to the receiving
tray, paper exiting options or ADU through the exit roller. In addition, the IH coil in the fuser roller does
not structurally rotate.
The thermistors control the temperature of fuser roller and detect temperature abnormalities. If the tem-
perature becomes excessively high, the thermostat is opened to stop the power supply to the IH coil.
November 2003 © TOSHIBA TEC 13 - 1 e-STUDIO350/450 FUSER UNIT / PAPER EXIT SECTION