![background image](http://html1.mh-extra.com/html/okidata/ml393c-plus/ml393c-plus_service-manual_729925237.webp)
Page: 155
Service Guide ML393/ML393CPlus
Chapter 4 Failure Analysis
4.8.05 Hexadecimal Dump
General Information
Hexadecimal Dump Mode allows you to test the data being sent from the computer to the printer.
When the printer is in Hex Dump Mode, all data received (including text and printer commands) will be
printed in both hexadecimal and ASCII format.
NOTE:
In ASCII format, all non-printable characters are represented by a period.
Example
Below is a line of BASIC code.
LPRINT CHR$(27) ;"0";CHR$(30);"This is an example of hexadecimal dump."
Below is the same line as it would appear in Hex Dump Mode.
This is an example of a hexadecimal dump
1B 30 1E 54 68 69 73 20 69 73 20 61 6E 20 65 78 0.
61 6D 70 6C 65 20 66 20 61 20 68 65 78 61 64
65 63 69 6D 61 6C 20 64 75 6D 70 2E 0D 0A
Procedure
1. Verify that paper is loaded.
2. Verify that the ribbon is installed.
3. Power OFF the printer.
4. Press and hold SELECT and FORM FEED while powering ON the printer.
5. The printer will print the line shown below.
HEX DATA DUMP
6. The printer is ready to receive data in the Hexadecimal Dump Mode.
7. Send data to the printer.
8. To exit Hex Dump Mode, power OFF the printer.
Sample