Epson DFX-9000 - Manual (Page 111)

Problem Solver 111
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2. To run the test using the Draft font, turn on the printer while
holding down the LF/FF Load button. To run the test using
the printer’s NLQ font, hold down the Top of Form button
while you turn on the printer. Either self test can help you
determine the source of your printing problem; however, the
draft self test prints faster than the NLQ test.
After a few seconds, the printer loads the paper automatically
and begins printing the self test. A series of characters is
printed.
Note:
To temporarily stop the self test, press the Pause button. To resume
the test, press the Pause button again.
3. To end the self test, press the Pause button to stop printing.
Tear off the page if necessary, and then turn off the printer.
c
Caution:
Do not turn off the printer while it is printing the self test.
Always press the Pause button to stop printing and then
turn off the printer.
Printing Hex Dump
If you are an experienced user or a programmer, you can print a
hexadecimal dump to isolate communication problems between
the printer and your software program. In hex dump mode, the
printer prints all data it receives from the computer as
hexadecimal values.
Note:
The Hex Dump feature is designed for use with DOS-based PC.
Follow these steps to print a hex dump: