User`s guide

5. Press in on the waste toner bottle until it locks into place.
6. Close the front cover.
Note:
When closing the front cover, press the area of the cover with small projections.
If the waste toner bottle is not fully inserted, the front cover cannot be closed.
Epson AcuLaser CX37 Series Printer/Copier/Scanner User’s Guide
Replacing Consumables and Maintenance Parts 183