Hexadecimal Dump Mode - Epson TM-L90 Technical Reference Manual

5. Follow the guidance to use the mode.
See the "Setting items for Memory Switch Setting Mode" on page 121 for setting items and
settings.

4.2.3 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.
Note:
Do not use this mode when using OPOS. To do so will cause continuous polling, ending in undesirable
results.
84 Setting/Checking Modes