Epson 5000/5500 - Manual (Page 58)

Control Panel
Other control-panel features
The control panel also gives you access to the two special functions
below.
Self test: Hold down the LF/FF button (for LQ printing) or the
LOAD/EJECT
button (for draft printing) while turning
on the printer to perform the self test. The self test
lets you check that your printer is operating properly
and gives you a printout of the current DIP-switch
settings.
See the section on testing the printer in Chapter 1 for
more information.
Data dump: Hold down the LF/FF and LOAD/EJECT buttons while
turning on the printer to enter data dump mode.
Data dump mode allows advanced users to find the
cause of communication problems between the printer
and the computer.
The data dump mode is more fully explained at the
end of this chapter.
Using the Printer 3-5