3.To turn off the data dump mode, press the ON LINE button to take the printer off line, and then turn off the printer. (The data dump mode can also be cancelled by sending an INIT signal from the computer.)
Look at the data dump shown in Step 2. By comparing the characters printed in the right column with the printout of the hexadecimal codes, you can check what codes are being sent to the printer. If characters are printable, they appear as their true ASCII characters. Nonprintable codes, such as control codes, are represented by dots.
As an example of how to interpret a data dump printout, look at the first three hex codes on the second line of the printout sample (20 20 54). Each hex 20 represents a space, while hex 54 represents the letter T. Check the second line of the right column and you will find the letter T preceded by two spaces.
The chart below interprets the first line of codes:
Hex codes | Command | Function | ||
1B | 40 |
| ESC @ | Initialize printer |
1B | 52 | 00 | ESC R0 | Select USA character set |
1B 74 01 | ESC t1 | Select Epson Extended Graphics | ||
1B | 36 |
| ESC 6 | Printable code expansion |
12 |
|
| DC2 | Cancel condensed mode |
1B | 50 |
| ESC P | Select 10 cpi |
1B | 70 00 | ESC p0 | Cancel proportional | |
Troubleshooting |