I/O Board; Sensors - Xerox PHASER 8500 Service Manual

Theory of Operation

I/O Board

Sensors

2-22
All sensor and switch readings are input into the I/O Board. The I/O Board
translates these states into encoded information that it sends over a serial
data bus (I/O Board data cable) to the Electronics Module. The Electronics
Module has no direct connection to sensors, switches, or solenoids. In order
to activate a clutch or solenoid, the Electronics Module sends a command to
the I/O Board, which processes the command and activates the appropriate
device.
Sensors throughout all the major subsystems provide indicators of vital print
operations. The following graphic identifies the location of the printer's
sensors.
Strip Sensor
Exit Door Sensor
Preheater
Sensor
Deskew
Sensor
Media Width
Sensor
Tray Empty
Sensor (Also in
Trays 3 & 4)
Pick Sensor
(525-sheet
Feeder)
Ink Low
Paper Exit Sensor
Ink Out
Tray Lift Sensor
(Also in Trays 3 & 4)
Phaser 8400/8500/8550/8560 Color Printer Service Manual
Drum
Temperature
Sensor
Drum
Position
Encoder
Front Door
Sensor
Paper
Size Sensor
s8500-023