Phaser 4500/4510 Service Manual 2-37
Theory of Operation
Paper Transport Path
When the stacker is installed on the printer, the paper is transported as shown
in the illustration on page 2-6. The main components that transport paper
through the stacker are shown in the diagram on page 2-4
Functional Components
Offset output is enabled by mounting the stacker on top of the 500-sheet
paper exit.
Stacker motor assembly This motor drives the lower stacker roller and upper
stacker roller, which transport printed paper to the stacker tray.
Offset motor assembly This motor drives the offset chute assembly via the gear
cam.
Gate solenoid assembly This solenoid switches the output paper path between
the standard and stacker paper output trays. When the gate solenoid
assembly activates, the solenoid armature pushes the stacker Gate Link to
operate the stacker exit gate, which reroutes the paper to the stacker paper
output tray.
Stacker PWBA The CPU on the stacker PWBA receives instructions from the
HVPS/engine logic board and information from sensors and switches, and
controls paper transport through the stacker.
Stacker rear cover switch This switch detects when the stacker rear cover is
open.
Stacker sensor This sensor detects the presence or absence of paper in the
stacker.
Stacker full sensor This sensor is located on the stacker PWBA, and detects
when the stacker output tray is full, using the stack full actuator.
Offset Sensor This sensor is located on the stacker PWBA, and detects an
offset operation, using the actuator in the Offset Chute.
Lower stacker roller This roller transports the printed paper coming out of the
Fuser to the Upper stacker roller.
Upper stacker roller This roller discharges the printed paper sent from the
Lower stacker roller into the stacker paper output tray.
Offset chute assembly This assembly is driven by the offset motor assembly
and Cam gear to move right and left during paper output to offset the output of
the printer.
To Next Page
Loading...
