Here are some of the steps you can take to troubleshoot your printer:

1. Check the printer settings to make sure the correct resolution is chosen.
2. Check the media source you are using to determine the maximum resolution.
3. Clean and calibrate the print heads to help avoid smudges or lines when printing.
4. Check for outdated printer drivers and/or firmware and ensure they are updated.
5. Check the output of a test page to see if the printer is creating the desired output.