User Guide

94 Chapter 4 - Operational overview EN
Printer paper-feed system
The main input tray and the priority input tray merge into one main
input area. Media placed in any of these areas activates the paper-
out sensor (PS201), which informs the ECU that media is present.
The following steps occur when the product receives a print job:
Step 1 The ECU activates the laser/scanner assembly and the
motor. Paper motion begins when the ECU energizes the
solenoid (SL001).
Step 2 The paper pickup roller rotates once. The paper lift plate
pushes the media against the pickup roller.
Step 3 The pickup roller grabs the top sheet and advances it to the
feed assembly drive rollers. To ensure that only one sheet is
fed, a main separation pad and two subpads hold the
remainder of the stack in place.
Step 4 The feed assembly drive rollers advance the media to the
top-of-page sensor (PS402). This sensor informs the ECU of
the exact location of the leading edge of media, so that the
image being written on the photosensitive drum can be
precisely positioned on the page.
Step 5 The feed assembly drive rollers then advance the media to
the transfer area where the toner image on the
photosensitive drum is transferred to the media.
Step 6 After the image is transferred, the media enters the fuser
assembly where heat from the fuser and pressure from the
pressure roller permanently bond the toner image to media.
The paper delivery sensor (PS401) determines that the
media has successfully moved out of the fusing area.
Step 7 The fuser assembly exit rollers deliver media to either the
paper output bin or the straight-through output path,
depending upon the position of the straight-through output
path door.