Printing A Hex Dump - Epson LQ-680 User Manual

2. To run the test using the Draft font, hold down the LF/FF
button while you turn on the printer. To run the test using the
printer's letter-quality fonts, hold down the Load/Eject
button while you turn on the printer.
After a few seconds, the printer loads the paper automatically
and begins printing a self test. A series of characters is printed.
3. To end the self test, press the Pause button to stop printing.
Then eject or tear off the printed page(s) and turn off the
printer.

Printing a Hex Dump

If you are an experienced user or a programmer, you can print a
hexadecimal dump to isolate communication problems between
the printer and your software program. In hex dump mode, the
printer prints all data received from the computer as hexadecimal
values.
You can print a hex dump using either single sheets or continuous
paper.
Note:
Use continuous paper that is at least 241 mm (9.5 inches) wide or A4 or
letter size single-sheet paper.
Troubleshooting
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