Epson SQ-2550 User Manual

By holding down the 

button (for draft) or 

button (for Letter Quality) while

you turn on the printer, you can

start the printer’s self test. The self

test printout lets you check the

current settings and operating

status of the printer. See the section

on testing the printer in Chapter 1

for more information.

By holding down both the 

and 

buttons while you

turn on the printer, you turn on the

data dump mode. This feature

allows advanced users to find the

cause of communication problems

between the computer and printer.

See the section on 

data dump

mode in this chapter for details.