Combination Sensors And Their Meanings; Transfer Roll Type Sensing; Table 1-1 Transfer Roll Core Sensor Combinations - Tektronix Phaser 440 Service Manual

1
General Information

Combination sensors and their meanings

Transfer roll type sensing

1-6 Phaser 440 Color Printer
Combinations of sensors are used by the Phaser 440 print engine to determine
the type of transfer roll and the type of media tray installed in the printer.
The combinations of the three transfer roll core sensors "tell" the print engine
what type of transfer roll is installed. The length of the cores (long or short)
actuate the switches. Long cores close the switches, turning them on.

Table 1-1 Transfer roll core sensor combinations

Right front Right rear
transfer roll core transfer roll core
sensor sensor
Closed Closed
Closed Open
Closed Closed
Left transfer roll Transfer roll type
core sensor
Open 4-Color Transfer Roll (with true
black)
Closed 3-Color Transfer Roll (with
composite black)
Closed Black Transfer Roll (monochrome)