Fusing Mechanism - Muratec MFX-3595 Field Engineering Manual

2.3.11 Fusing mechanism

The toner image transferred on to the paper is securely fixed.
A heat roller system is used as the fusing system. The toner image is fused by heater roller heated by the
heater lamp, and securely fixed by the pressure between the heater roller and press rollers.
A thermistor detects and controls the heater roller temperature.
The thermostat functions when the heater lamp is not turned OFF even if the thermistor detects a high tem-
perature malfunction.
No.
1 Scraper
3 Heater lamp
5 Press roller
Fusing temperature control circuit
The thermistor detects the surface temperature of the heater roller and inputs that analog voltage into the
main control board. Corresponding to this data, the heater lamp ON/OFF signal is output to the heater ON/
OFF switch of the power supply unit, causing the heater lamp to turn ON or OFF to control the fusing tem-
perature.
When the heater lamp is not turned OFF even if the thermistor detects a high temperature malfunction, the
first thermostat shuts down the power to the heater lamp. When the first thermostat is malfunction, the sec-
ond thermostat shuts down the power to the heater lamp.
AC Inlet
N
L
1
2
3
4
Part name
Power supply unit
Main switch
No. Part name
2 Thermistor
4 Heater roller
Heater
on/off switch
Fusing unit
Thermostat
2-18
5
Main Control PCB
Fusing temperature
control circuit
Thermistor
Heater Lamp
Thermostat