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

Command

Function

 

 

 

 

 

 

1B

40

 

ESC

@

Initialize printer

1B 52

00

ESC

RO

Select USA character set

1B

74

01

ESC tl

Select Epson Extended Graphics

1B

36

 

ESC

6

Printable code expansion

12

 

 

DC2

 

Cancel condensed mode

1B

50

 

ESC

P

Select pica

1B

70

00

ESC

p0

Cancel proportional

 

 

 

 

 

 

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