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As the paper moves from the Switchback Assembly, it is picked
up by the rollers that are operated by the Holding Tray Input
Stepper Motor. The Input Stepper Motor moves the paper into
the Holding Tray. When the paper moves the flag that controls
the Holding Tray Paper Sensor, the Duplex Control PCA turns off
the Input Stepper Motor, and the paper stops moving.
The paper remains in the Holding Tray until the print engine
signals the Duplex Control PCA that it is ready to print the
second side. The Duplex Control PCA will then turn on both the
Holding Tray Input Stepper Motor and the Holding Tray Output
Stepper Motor. These motors will move the paper out of the
Holding Tray into the paper input of the print engine. The paper
is then printed on the second side. When the paper exits the
Fuser Assembly, the Switchback Input Guide routes the paper
directly to the printer’s output tray.
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Figure A-2 Duplexer Major Components
A -4 Duplexer