Checking The Print Head Nozzles - Epson Stylus Pro 7800 User Manual

Print Head Alignment
This utility can be used to improve the print quality of your
printed data. The alignment of the print head may need to be
adjusted if vertical lines appear out of alignment or if white or
black banding noise appear in your printed data. Use this utility
to realign the print head. See "Aligning the print head" on page
195.
EPSON LFP Remote Panel
This utility lets you optimize your printer. See "Starting EPSON
LFP Remote Panel" on page 195.
Print Assistant
You can also access the User's Guide, the media information, and
Technical Support Web Site by clicking the Print Assistant button.
See "Using the Print Assistant function" on page 196.

Checking the print head nozzles

If you find that the printed data is unexpectedly faint or dots in
the printed data are missing, you may be able to identify the
problem by checking the print head nozzles by using the Nozzle
Check utility.
To use the Nozzle Check utility, follow the steps below.
Note:
Do not start the Nozzle Check utility while printing is in progress;
otherwise, your printout may be marred.
1. Make sure paper is loaded in the printer.
2. Click Nozzle Check.
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Printing with Mac OS X