When printing 2 sides, the paper proceeds to printer’s simplex section first by pickup roller to print front
side. The front side printed paper passes Fusing unit and goes to delivery roller and the solenoid operates
forward/reverse bracket and the roller turns reverse allowing the paper to be transferred to Duplex Unit’s
duplex section.
The paper transferred to duplex section again passes simplex section and at here, the backside of the
paper gets printed and finally goes to bin tray through the roller.