Running The Self Test - Epson LX-300 User Manual

Running the Self Test

The built-in self test function demonstrates that the printer is
working properly. You can run the test with either continuous
paper or single sheets; this section describes the easier way, with
single sheets.
1. Make sure the printer is turned off and the paper-release lever
is pushed back to the single-sheet position. Raise the paper
guide upright.
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Setting Up the Printer
Caution:
You should use paper at least 210 mm or 8 1/4 inches wide to
run the self test; otherwise, the print head prints directly on
the platen.