Paper Path - Xerox DOCUPRINT N4525 Service Quick Reference Manual

Paper Path

The Duplex Unit Paper Path is the physical route that a sheet of paper takes through the
printer and through the Duplex Unit during a duplex print cycle. Rubber rollers and
solenoid activated gates drive and direct the paper along the Paper Path. The primary
purpose of the Duplex Unit Paper Path is to accept a printed sheet of paper from the Fuser
exit area, drive that sheet down through the Duplex Unit, effectively flipping over the
sheet, and refeed the sheet back into the printer registration area so the printer can begin to
transfer an image onto the second side.
The Duplex Unit provides duplex printing for paper fed from all
Note
available paper trays except the Envelope Feeder, which cannot
be duplexed.
Step 1
The Drum and Bias Transfer Roller place an image on side one of a 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. The Exit Gate Solenoid toggles the
Exit Gate so the paper path runs to the Offset Roller. The Offset Roller drives the sheet
partially into the Output Bin, then stops.
Fig 3-3 Duplex Paper Path - Step 1
3-502 DocuPrint N4525 Network Laser Printer - Service Guide
First Image
S4525-322