Epson 800 User Manual page 90

Using Optional Interfaces
5. Slide the interface board along the slots on both sides of the
compartment. Push it in firmly to fully insert the board's
connector into the printer's internal socket.
6. Secure the interface board in the slot with the two screws
included with the interface board.
7. Connect the proper interface cable to the interface board
and to your computer. If the cable has a grounding wire,
connect it to one of the screws securing the parallel
interface.
Also, if you are using more than one computer, reconnect
the other interface cable.
8. Make sure the printer is turned off. Then plug in the power
cord.
In most cases, the printer automatically detects the interface
you're using. However, if you have trouble printing through an
installed interface board, you may need to change the printer's
I/F (interface) mode setting. See page B-7 for instructions.
To remove the interface board, follow the above steps in reverse
order.
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