Xerox ColorQube 9303 Series, Service Manual, Page: 1738 / 1812

February 2013
8-44 ColorQube® 9303 Family
Principles of Operation
Paper Size Sensing
Trays 1 and 2 can accommodate various paper sizes which the machine can detect, according
to the position of the paper guides. The paper guide positions are detected by five switches at
the rear of each drawer, mounted on the 3TM PWB. As the paper guides are adjusted, slotted
guide brackets slide to the left or to the right. When the drawer is then closed, the combination
of the switches actuated, informs the 3TM PWB which size paper is held in the drawer.
Figure
4 shows the components of the trays 1 and 2 paper size sensing function.
Figure 4 Tray 1 and 2 paper size components
Paper Tray Elevation
Trays 1 and 2 each have an elevate system which lifts the stack. A stack height sensor detects
and maintains the top of the paper stack at the correct height. An elevate plate is pivoted at the
right hand edge of the tray and the left edge is raised by a lift bar. The method of elevation is
achieved by driving the feed motor in reverse through a gear train and a one-way clutch.
Figure
5 shows the tray 1 and 2 elevator components.
Tray 3 has a dedicated elevator motor. Stack elevation is achieved with a parallel elevate plate
and supporting hoist cables and pulleys. The drive for this system is by a motor with a coupling
to a gear box. A stack height sensor detects the correct paper stack height and an over run
switch removes the power from the elevator motor if necessary.
Figure 6 shows the tray 3 ele-
vator components.
Figure 5 Tray 1 and 2 elevate system
Paper width
guide
3TM horizontal
transport home
switch
Media size switch,
(5 per tray)
Paper length
guide
Paper width
guide bracket
Paper length
guide bracket
Three trays module
PWB
Tray 1 media size
sensors PWB
Feed and ele-
vate motor
Elevator clutch
Drive dog
Elevate drive gears
Stack height
sensor
Paper tray plate
Paper tray plate lift
bar