Epson ActionPrinter 4000 User Manual page 168

Boards
The Interface
3. Secure the board with the screws provided.
4. For all interface boards except #8143 New Serial Interface board,
set the DIP switches on the interface board according to the
manual accompanying it. If you have the #8143 board, see the
next section.
Attaching the interface board cover
1. Bend back the hinge plate on the interface board cover.
5-44 Using the Printer Options