Epson LQ 1050 User Manual - Page 118

Troubleshooting 3. To turn off the data dump mode, press the ON LINE button to stop the printing and set the printer off line, then turn off the printer. (It can also be cancelled by sending an INIT signal from the computer .) The data dump shown in Step 2 was made while writing this section. By comparing the characters printed in the right column with the printout of hex codes, you can check what codes are being sent to the printer. If characters are printable, they appear as their true ASCII characters. Non-printable 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 code (20) represents a space; while the hex code (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 seven non-printable codes: Hex codes 1B 40 1B 52 00 1B 74 01 1B 36 12 1B 50 1B 70 00 Command ESC @ ESC RO ESC tl ESC 6 DC2 ESC P ESC p0 Function Initialize printer Select USA character set Select Epson Extended Graphics Printable code expansion Cancel condensed mode Select pica Cancel proportional 6-6