Epson ActionLaser 1600 Reference Manual page 105

Horizontal black or white bands or black page
Install a new imaging cartridge as described in the Read This
First guide.
Uneven darkness
Your paper may be moist or damp. Printing is sensitive to
moisture absorbed by the paper. Do not store your paper in a
humid or damp environment.
Take out the imaging cartridge, shake it gently from side to
side, and then reinstall it.
If this does not solve the problem, install a new imaging
cartridge as described in the Read This First guide. Then print
several pages to check the print quality.
Toner smudges
Remove the imaging cartridge, shake it from side to side to
distribute the toner, and wipe the bottom of it with a clean, dry
Cloth.
Turn off the printer. Clean the paper path inside the printer
using a clean, soft, dry cloth.
Clean internal printer components by printing three pages with
only one character per page.
If the problem remains, replace the imaging cartridge as
described in the Read This First guide.
Troubleshooting and Maintenance 6-9