Epson AcuLaser C3900N User Manual page 100

7. Prepare a new fuser unit.
Note:
Be careful not to touch the surface of the fuser roller.
8. Pull down the 2 levers of a new fuser unit.
9. Insert the fuser unit until it locks into place.
AcuLaser C3900 Series
Replacing Consumables and Maintenance Parts
User's Guide
100