Epson LQ-500 User Manual page 24

Testing the Printer
3. While holding down the button (draft mode) or the
LINE FEED
button (Letter Quality mode), turn printer.
FORM FEED
on the
After printing starts, release the button.
A list of your printer's settings is printed first, followed by a series
of characters. Here is part of a typical draft self test:
1-17
Setting Up the Printer