Epson LQ-950 User Manual - Page 119

By comparing the characters printed in the text field on the right side of the data dump printout (see step 3) with the printout of hex codes, you can check which 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. To interpret the data dump printout, examine the first three hex codes on the second line of the printout sample (20 20 54). Each hex code 20 represents a space; hex code 54 represents the letter T. Check the second line of the text field on the right side of the printout and you will find the letter T preceded by two spaces. The chart below interprets the first eight codes. Hex codes lB40 lB5200 lB7401 Command ESC ESCRO ESC11 Function Initialize printer Select USA character set Select Epson Extended Graphics set Using the Printer 3-37