Epson 300 - Manual (Page 58)

4. Hold down the
E
load/eject button and turn on the printer;
then release the button.
The printer prints an operation check page including the
version of your printer’s ROM, the ink counter code, and a
nozzle check pattern. Here is a typical printout:
The above sample is in black and white, but the actual test prints
in color (CMYK).
26-B+
check1.tif
L Hudson++ Ref. Guide
Rev.d
A5 size Chapter 6
04-30-98 DR, pass 3
6-4 Troubleshooting