Hexadecimal Dump Mode - Epson TM-L90 Technical Reference Manual

5. After briefly pressing the FEED button (less than one second) for the number of times shown
in the print result, hold down the button for more than one second, and then select the
setting items.
The setting selected as the setting item, the current settings and initial settings are printed.
Depending on the setting item, you may need to continue making the setting item before the settings
are printed.
See "Setting items for Memory Switch Setting Mode" on page 121 for setting items and
settings.
6. Select a setting by briefly pressing the FEED button (less than one second) for the number of
times applicable to the setting, and then hold down the button for more than one second to
confirm your selection.
After saving the settings, a guidance for the Memory switch setting mode is printed, and the PAPER
OUT LED flashes.
7. To close Memory switch setting mode, turn off the printer, or select "Exit" to return to Mode
selection guidance, and then select "Exit and Reboot Printer".
Note:
❏ To select 0 as the item number, hold down the FEED button until printing starts.
❏ If the button is pressed a number of times that is not displayed by the guidance, the operation is
invalid and the same guidance is printed.

4.1.4 Hexadecimal Dump Mode

TM printer can print the data transmitted from the host computer in hexadecimal numbers and
in their corresponding characters. This is called hexadecimal dump mode, which allow you to
make sure the transmission is correct by comparing the printed result with the programs.
Use the following procedure to output a hexadecimal dump.
1. For TM-L90, open the roll paper cover.
For TM-L90 Peeler, open the peeler cover and the roll paper cover.
2. Turn on the power while pressing FEED button inside the printer. Keep pressing the button until the
ERROR LED comes on.
3. For TM-L90, close the roll paper cover.
For TM-L90 Peeler, close the roll paper cover, and then after loading paper in the paper path, press the
paper feed switch.
Data received after this is printed in hexadecimal numbers and their corresponding
characters.
4. When printing stops, turn off the power or press the FEED button three times or send a reset signal
from the interface.
TM-L90/TM-L90 Peeler Model Technical Reference Guide
Setting/Checking Modes 81