Xerox Phaser 4500 Service Manual

Theory of Operation 2-9
No paper Mechanically
actuated photo
sensor
Detects no paper condition in
all trays.
Page 2-17
Paper size
switches
Microswitch bank Detects the presence of a tray
and the paper size setting of
the tray.
Page 2-17
Page 2-44
Registration
sensor
Mechanically
actuated photo
sensor
Detects the paper as it
reaches the registration rollers.
Page 2-11
Page 2-17
Toner sensor Magnetic sensor Detects the presence of toner
in the Print Cartridge.
Page 2-17
Exit sensor Mechanically
actuated photo
sensor
Detects paper as it leaves the
fuser.
Page 2-25
Stack Full sensor Mechanically
actuated photo
sensor
Detects when the standard
output tray is full.
Page 2-29
Temperature
sensor
Soft Touch Sensor Two of these monitor the
temperature of the Heat Roller.
Page 2-25
Rear Cover
Switch
Microswitch Interrupts +24 V to the Main
Motor when the Rear Exit
Cover is open; in series with
24 V Interlock.
Page 2-32
24 V Interlock Microswitch Interrupts +24 V to the Main
Motor when the Top Cover is
open; in series with Rear
Cover Switch.
Page 2-32
Top Cover Switch Microswitch Interrupts INTERLOCK BEF to
indicate the Top Cover is open.
Page 2-32
Laser Interlock Microswitch Interrupts +5 V to Laser Diode;
in series with 5 V Interlock
Switch.
Page 2-32
5 V Interlock Microswitch Interrupts +5 V to Laser Diode.
In series with Laser Interlock.
Page 2-32
Start of scan
sensor
Photo Detects the laser beam at the
start of a scan.
Page 2-22
Fuser
Thermostats
Thermostatic
switches
Interrupt AC power to the
Fuser Heater in overtemp
condition; two switches in
series.
Page 2-25
List of Sensors and Interlocks
Name Type Function Reference

Xerox Phaser 4500 Specifications

General

Brand	Xerox
Model	Phaser 4500
Category	Printer
Language	English