Epson EPL-N1600 Option, Service Manual

Page: 45 / 210

EPSON EPL-N1600 Chapter 2 Operating Principles
Rev. A 46
FUSING AND PAPER EXIT
Sensor Assembly Photo Exit and Actuator-Exit:
Detect when paper passes the position just after
the Fuser.
Roll Pressure: A roll with sponge rubber attached around a
metal shaft. The Roll Pressure is pressed up by
the springs and applies pressure to the paper
passing between itself and the Roll Fuser.
Fuser Unit: Roll Fuser:
A hollow, surface-coated metal tube that is
heated by the Heater lamp held inside the roller.
The toner on the paper is melted and bonded to
the paper by means of heat and pressure
applied by the rollers.
Heater Lamp:
A glass tube with a heat generating coil sealed
in it. The Heater Lamp is located inside the Roll
Fuser and heats the Roll Fuser.
Sensor Assembly Temperature:
A resistor (thermistor) whose resistance varies
sharply in a known manner with the
temperature. This sensor is held in contact with
the surface of the Roll Fuser and monitors the
temperature. The signal from this sensor is used
to maintain the temperature of the surface of the
Roll Fuser within the specified range by
switching on and off the AC power to the Heater
Lamp. The signal is also used for the first-stage
overheat protection.