Insert a universal serial bus (USB) drive in the printer's front panel port and place a colored document with images and text through the automatic document feeder (ADF).
If the USB drive port is disabled or should a USB drive be unavailable, then the same test can be performed using Scan to E-mail, or any other scan workflow.
Perform a Scan to USB Drive (or Scan to E-mail) and make sure to use the following settings:
Scan at least 50 sheets through the ADF.
Remove the USB drive out and insert it into a computer. If the port is disabled or not working, then check the images that were sent to the e-mail.
View every page of the file and look for images which are affected by the defect found in the overview section.
The issue can be intermittent, so this procedure may need to be repeated three or four times.
If there are scan quality issues found after performing the scanner test, take note that the issue is 'scanner' related then proceed to Step 3.