Xerox DOCUPRINT N4525 Service Quick Reference Manual page 172

Step 3
The Drum and Bias Transfer Roller place an image onto the second side of the sheet of
paper. The Drum/Bias Transfer Roller drive the paper into the Heat and Pressure Rollers.
The Heat and Pressure Rollers drive the sheet into the Exit Unit. Depending on the output
location the user selected, the Exit Gate Solenoid toggles the Exit Gate so the paper path
runs to either the Face Down Output Bin or back through the Duplex Unit and into the
Face Up Output Bin.
If the user selected the Face Down Output Bin the Exit Gate Solenoid toggles the Exit
Gate so the paper path runs to the Offset Roller, which drives the sheet into the Face Down
Output Bin.
If the user selected the Face Up Output Bin, the Exit Gate Solenoid toggles the Exit Gate
so the paper path runs to the Exit Rollers, which drive the sheet into the Duplex Unit.
Inside the Duplex Unit the Duplex Exit Gate Solenoid toggles the Duplex Exit Gate so the
paper path runs to the Duplex Exit Rollers, which drive the paper into the Face Up Output
Bin.
S4525-324
Fig 3-5 Duplex Paper Path - Step 3
3-504 DocuPrint N4525 Network Laser Printer - Service Guide