Since the printer creates images using a linear print process, if there are issues with nozzles not firing, these will show as bands of lighter or darker color across the image.
To eliminate banding, follow the procedures below:
Run a Nozzle Check.
If needed perform the necessary Print Head cleaning.
Check the LCD Control Panel and check for low or empty ink cartridges if any are low or out of ink, replace with a new ink cartridge.
Open the printer cover, and check the Ink Tubes. If any of the tubes have gaps in them, it will be necessary to do a Print Head Clean.
Adjust the Print Table height to the correct level.