Epson 3260 - Manual (Page 78)

Note:
You can use hex dump mode to find the cause of communication
problems. See page 3-13.
If the printer still does not print correctly try the self test
described in Chapter 1. If the self test works properly, the printer
is all right and the problem probably lies in the computer, the
software, or the cable. If the self test does not work, contact your
dealer or a qualified service person.
Color printing problems
Characters are not printed during color printing.
Your software program may not be properly set up for color
printing. Use the program's setup (or install) procedure to
check the printer setting and adjust as needed.
The desired color is not printed
The printing color may not be set correctly. If your application
program is capable of sending control codes, select the color
using the ESC r command (See the “Command Summary”).
The ribbon cartridge may may be installed properly. Remove
the ribbon cartridge and reinstall it. See Chapter 1.
3-22 Using the Printer