If you notice blank pages being ejected, misaligned vertical lines, blurred images, or horizontal banding, try Print Quality Adjustment.
Head cleaning may be necessary after performing Print Quality Adjustment. Check the following items when performing head cleaning.
Head cleaning consumes ink and should not be performed more than necessary.
When ink is low, you may not be able to clean the print head.
Do not turn off the printer during head cleaning. If the head cleaning is incomplete, you may not be able to print.
Select More on the printer's control panel.
Select Maintenance > Print Quality Adjustment.
Follow the on-screen instructions to print the adjustment pattern and scan it.
Close the document cover before scanning.
Adjustments are performed automatically.
When placing the adjustment pattern on the Scanner glass
Check the paper placed on the scanner glass and select Start Scanning. If the paper is folded or out of alignment with the corner mark, it cannot be scanned.
Even if a blank sheet is ejected, follow the on-screen instructions to scan. If you scan a blank sheet of paper, scanning will fail. If this occurs, press the 
button, and follow the on-screen instructions.
If the problem does not improve even after performing Print Quality Adjustment, go to Maintenance to perform all available print head adjustments (nozzle check, cleaning, Alignment adjustment). See Related Information for more details.
You can also perform Print Quality Adjustment from the printer driver.
Windows
Click Maintenance on the Maintenance tab, and then select Print Quality Adjustment.
Mac OS
Apple menu > System Preferences (or System Settings) > Printers & Scanners (or Print & Scan, Print & Fax) > Epson(XXXX) > Options & Supplies > Utility > Open Printer Utility > Print Quality Adjustment