Fuji Xerox Phaser 5500 Service Manual page 52

Thermistor
Thermistors have a known value of resistance whose value varies with temperature.
Used primarily in the Fuser for temperature sensing.
A fourth sensor in use is the antenna used to communicate with the Drum and Toner
Cartridge CRUMs.
This list briefly describes the type and function of sensors and switches used to
determine operational status and detect jams or failures.
List of Sensor and Interlock Functions
Name
Level Sensor
No Paper
Paper Size
Pre-Feed
Registration
Feed Out
Exit
Stack Full
Temperature
Door Interlocks
Drum Cartridge
Detect switch
Start of scan
Fuser Thermostats
Offset
Environmental
CRUM antenna
OCT Home
Position
2-12
Type
Photo-receptive
Photo-receptive
Microswitch array
Photo-reflective
Photo-receptive
Photo-reflective
Photo-receptive
Photo-receptive
Thermistor
Microswitch
Microswitch
Photo
Thermostatic switches
Photo-receptive
Integrated circuit PWB
Inductive code reader
Photo-receptive
Microswitch
s5500-028
Function
Detects paper stack height in Trays 2~6.
Detects no paper condition in all trays.
Detects the tray and the paper size.
Detects paper jams in the feeder.
Detects paper at the registration rollers.
Detects paper leaving the feeder.
Detects paper as it leaves the Exit.
Detects when the output tray is full.
Monitor temperature of the Heat Roller.
Interrupts +24 V to the Main Motor
Interrupts +5 V to Laser Diode.
Detects laser at the start of a scan.
Interrupts AC power to the Fuser.
Senses the position of the Offset Chute.
Monitors the printer's Temp and humidity.
Communicates with the CRUMs.
Detects Offset assembly home position.
Phaser 5500 Printer Service Manual