Epson C11CF39402A0 User Manual page 116

Caution:
!
Whenever you turn off the printer, wait at least five seconds before turning it back on;
otherwise you may damage the printer.
2. To enter hex dump mode, turn on the printer while holding down both the LF/FF and Load/Eject
buttons.
3. Open a software program and send a print job to the printer. Your printer prints all the codes it
receives in hexadecimal format.
By comparing the characters printed in the right column with the printout of the hexadecimal
codes, you can check the codes being received by the printer. If characters are printable, they
appear in the right column as ASCII characters. Nonprintable codes, such as control codes, are
represented by dots.
4. To exit the hex dump mode, press the Pause button and eject the printed page(s), and turn off the
printer.
Caution:
!
Do not turn off the printer while it is printing the hex dump. Always press the Pause button to stop
printing and the Load/Eject button to eject the printed page before you turn off the printer.
LQ-590II/LQ-590IIN/LQ-2090II/LQ-2090IIN User's Guide
Troubleshooting 116