User Guide

182 Chapter 5 - Theory of operation EN
Tray 1 pick-up — One sheet of paper is pressed to the multi-
purpose pick-up roller by the paper lifting plate and is picked up
by the rotation of the pick-up roller. Any extra sheets are removed
by the separation pad, then sent into the printer. Operation after
transmission is the same as for tray pick-up except that the paper
lifting plate solenoid is reset on to lower the paper lifting plate
right after registration roller rotation.
• Tray 1 paper-width sensor — The tray 1 paper-width sensor
(PS1701) detects the paper width when the user adjusts the
media width guides, which moves the slide resistance
connected with the size-control plate. When paper is loaded in
tray 1, the controller board detects the paper width. If the
paper width is not the width specified by the formatter, the
controller board notifies a paper-size failure to the formatter
and stops the printer.
• Tray 1 last-page detection — The tray 1 last-page sensor
(PS19) monitors the rotation of the last-page detection roller in
tray 1 and detects the last page. If the tray has two or more
pages, the last page detection roller does not rotate at pick-up.
When the last page is picked up, the last-page detection roller
rotates past the page and PS19 and sends an off to signal the
controller board. The controller board then signals the
formatter that no pages are in tray 1 and stops the next image
formation. The PS19 detects no page before the next image is
written and prevents the imaging drum and the transfer drum
from getting dirty.