Epson 1500 - Manual (Page 61)

Vertical black or white bands or lines
Clean the printer lens. Remove the imaging cartridge and place
it on a clean, flat surface. Locate and clean the clear lens on the
inside middle of the printer.
Wipe the lens from end to end with a clean, soft, dry, lint-free
cloth. Then re-insert the imaging cartridge in the printer and
close the printer cover. If the problem remains, install a new
imaging cartridge as described at the end of this chapter and
print several pages to check the print quality.
Horizontal black or white bands or black page
Install a new imaging cartridge as described at the end of this
chapter.
Troubleshooting 3-9