Epson EPL-7500 User Manual page 218

Holding the controller board with the memory expansion board
8.
side toward you, fit the edges of the board into the black
tracks in the opening. Be sure that both the top and the bottom
edges of the board are in the corresponding black tracks.
Gently slide the board about halfway into the printer. Also
move the white levers so that they point straight up and down,
as shown below.
9. Now slide the controller board completely into the printer.
(Do not touch the two white levers as you do this because they
pivot outward as the board locks into place.) If the controller
board does
Remove it and check to
the tracks.
fit smoothly into
not
see that the
The Memory Expansion Board
printer, do not force it.
the
edges are set properly into
Appendix A
A-23