Xerox Nuvera 100, Service Manual

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General Information 1-15
Media Tray Type Sensing
The combinations of the three tray sensors inform the print engine
what type of media tray (A or A4) is installed. These combinations are
shown in Table 1-2. 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 two tray types:
• Letter (A-size). This tray is sized for 8.5 x 11-inch (U.S.)
paper.
• Metric Letter (A4-size). This tray is used for 210 x 297 mm
(Metric) paper.
Table 1-2. Tray Switch Sensor Combinations
Tray type
A Paper A4 Paper
Top switch Closed Open
Middle switch Open Closed
Bottom switch Open Open
Front Panel
These front panel features (shown in Figure 1-11) are found on the
printer:
• 128 x 64 pixel backlit LCD graphic display
• Two push buttons and four navigation arrow buttons
• Two LEDs (Power and Error)
LCD. The backlit LCD serves two purposes: displaying current image
processor and print engine status information and displaying an
interactive menu. Status information includes image processor status
such as Ready to Print, Receiving Data and Printing. Print engine
status includes messages such as Out of Paper, Paper Jam and Add
Ink as well as error messages.
Customers can review and modify certain NVRAM, I/O ports and
peripheral parameters. Using the front panel to review and change
parameters is discussed in the topic, “Adjustments”.
Buttons. Four of the six buttons are arranged as a diamond-shaped
keypad. The other two buttons are used as Select and Help.
In the Service Support menu, pressing and holding the Left arrow
button , and then pressing the Select button enters the hidden
service support menu.
Pressing and holding the Right arrow button and then pressing the
Select button proceeds immediately to the language selection menu.