Epson U220B - TM Two-color Dot-matrix Printer Technical Reference Guide

4-8 Troubleshooting Rev. D
4. Run any software program that sends data to the printer. The printer prints “Hexadecimal
Dump” and then all the codes it receives in a two-column format. The first column contains
the hexadecimal codes and the second column gives the ASCII characters that correspond to
the codes. Part of a hexadecimal dump is shown below:
Hexadecimal Dump
To terminate hexadecimal dump,
press FEED button three times.
1B 21 00 1B 26 02 40 40 . ! . . & . @ @
1B 25 01 1B 63 34 00 1B . % . . c 4 . .
41 42 43 44 45 46 47 48 A B C D E F G H
• A period (.) is printed for each code that has no ASCII equivalent.
• In hex dump mode all commands except real time ESC/POS commands are disabled.
5. Open the cover to set the printer offline so that it will print the last line.
6. Close the cover and turn off the printer, press the FEED button three times, or reset the
printer to turn off the hex dump mode.
Note:
The hexadecimal dump mode can’t be used with OPOS or the APD.

Epson U220B - TM Two-color Dot-matrix Printer Specifications

General

Brand	Epson
Model	U220B - TM Two-color Dot-matrix Printer
Category	Printer
Language	English