Epson ActionPrinter 4000 User Manual page 206

Options
Problem
Using the font
module, the
module's fonts do
not print.
The font module is set,
but the fonts in the
module do not print.
Using an optional
interface, the printer
does not operate
properly.
The printer does not
print or the printout is
not what you expected.
7-32 Troubleshooting
Solution
The font module may not be fully
inserted in the slot. Check it and insert the
module properly if necessary.
The font module may be inserted the
wrong way. Align the (>) marks on the
module and the slot and insert it
properly.
The font in the module may not be
correctly selected. Select the slot by
FONT
pressing the
panel.
If your program allows you to use control
codes, use ESC k command to select the
font.
The interface board may be loose or not
properly connected. Check that the
interface board is correctly inserted into
the connector on the main board.
button on the control