Combination Sensors And Their Meanings; Media Tray Type Sensing - Xerox Phaser 840 Service Manual

Combination sensors and their meanings

Combinations of sensors are used by the printer to determine the type of standard (or
upper) media tray installed in the printer.

Media tray type sensing

The combinations of the three tray sensors inform the print engine what type of media tray
is installed. (The print engine does not detect the type of media installed in the tray; it
only detects the particular tray being used by the presence of sensor flags on the side of the
tray.) The tray sensors are located on the right-side interior of the paper tray slot, mounted
on I/O board right. There are five tray types:
Letter (A-size). This tray is sized for 8.5 x 11-inch (U.S.) paper as well as
I
low-volumes of A-size transparency film.
Metric Letter (A4-size). This tray is used for 210 x 297 mm (Metric) paper as
I
well as low-volumes of A4-size transparency film.
High-volume Transparency/Label (A). This tray supports high volumes of
I
U.S.-size transparency film as well as laser quality, adhesive label stock.
High-volume Transparency/Label (A4). This tray supports high volumes of
I
Metric-size transparency film as well as laser quality, adhesive label stock.
Legal Tray (Phaser 860 only) This tray supports Legal-size, US 8.5 x 14 inch
I
paper.
Table 1-5 Tray switch sensor combinations
Tray type A Paper
Top switch Closed
Middle switch Open
Bottom Open
switch
The slide switch actuators on the media trays will open a
switch in the forward position and close a switch in the rear
position.
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A4 Paper A
Transparency
Open Closed
Closed Open
Open Closed
A4 Legal Size
Transparency
Open Closed
Closed Closed
Closed Open