Theory of Operation 2-39
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.
Stack 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.
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