- HP All-in-One Printer Manual

Q2431-90912 Chapter 5 Theory of operation 99
Reversing and duplexer pickup
The duplexer has two stepping motors: the reversing motor (M701) and the duplex feed motor
(M702). The duplexer driver controls forward and reverse rotations of the motor.
The face-up output tray diverter, which is controlled by the duplexer solenoid, feeds print media
to the duplexer.
Note The duplexer cannot be used if the face-up tray is open,.
When the trailing edge of the media passes the reverse sensor (PS703), the reversing motor
changes direction. The oblique roller and feed roller then move the media so that its edge makes
contact with the left panel to correct skew.
Figure 30. Duplexer pickup and reversing diagram