Service manual

Rev. 1.04

- 18 -

EM 220

Mobile Printer Service Manual

2-9 Hexadecimal dumping

This feature allows experienced users to see exactly what data is coming to the printer.

This can be useful in finding software problems. When you turn on the hexadecimal dump function, the

printer prints all commands and other data in hexadecimal format along with a guide section to help you find

specific commands.

• To use the hexadecimal dump feature, follow these steps:

1) Turn off the printer, remove the paper roll from the paper housing, and open the paper cover.

2) Hold down the FEED button while you turn on the printer.

3) Put the paper roll in the printer and close the paper cover.

4) Run any software program that sends data to the printer. The printer prints "Hexadecimal dump" and

then all the codes are received 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.

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.)

5) If the feed button is pressed 3 times., the printer finishes Hexadecimal dump mode, printing the

message “Online Hex Dump Completed” on the paper.