Muratec MFX-1330 Field Engineering Manual page 28

Fusing Temperature Control Circuit
The Thermistor detects the surface temperature of the Heater Roller and inputs that analog voltage into
the Main Control PCB. 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 temperature.
When the Heater Lamp is not turned OFF even if the Thermistor detects a high temperature malfunction,
the thermostat shuts down the power to the heater lamp. When the thermostat is malfunction, the thermal
cut-off shuts down the power to the heater lamp.
AC Inlet
L
N
Fusing temperature
1) Warming Up After the initialization of the printer, warming up of the printer starts and the Heater
Lamp turns ON until the temperature of the Heater Roller reaches approx. 180 °C.
2) Printing When the printer obtains the printing command from its controller, the Heater
Roller is maintained at 180 °C.
After printing, the printer turns to standby mode. The fuser kept at low temperature.
3) Standby mode The Heater Roller maintained at approx. 120 °C.
4) Energy save mode In this mode, saving the power.
Temperature
( F) ( C)
392 200
356 180
248 120
Warming up
Power ON
Power supply unit
Main switch
Heater
on/off
switch
Printing
Main Control PCB
Fusing unit
Thermostat
Post card printing only
Standby mode
Energy save mode
2-16
Fusing temperture
control circuit
Thermistor
Heater Lamp
Thermal cut-off
Time