Checking The Print Head Nozzles - Epson Stylus Pro 4000 Reference Manual

Head Cleaning
This utility cleans the print head. You may need to clean the print
head if you notice print quality has declined. Use this utility to
perform the head cleaning. See "Cleaning the print head" on page
104.
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 should appear out of alignment or if
white or black banding noise should appear in your printed data.
Use this utility to realign the print head. See "Aligning the print
head" on page 105.
Printer and Option Information
This utility lets the printer driver to confirm printer configuration
information. It also provides specific information regarding each
certain characteristics of the printer, such as Cartridge Option and
the Printer ID. See "Using Printer and Option Information" on
page 106.

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 using the Nozzle Check utility.
To use the Nozzle Check utility, follow these steps.
Note:
Do not start the Nozzle Check utility while printing is in progress;
otherwise, your printout may be marred.
1. Make sure that paper is loaded in the printer.
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Printing with Windows