Epson AcuLaser C3900N User Manual page 85

7. Peel off the protective film from the right side of the toner cartridge.
8. Make sure that the toner cartridge is the same color as the printer compartment, and then insert
the toner cartridge into the printer.
Note:
Fully insert the toner cartridge.
9. Pull the lever to the right to lock it in place.
AcuLaser C3900 Series
Replacing Consumables and Maintenance Parts
User's Guide
85