Epson LX-810 User Manual page 189

Interface Boards
5. Reattach the push feed tractor.
6. Reattach the ribbon cartridge, paper tension unit cover, and
platen knob.
: (D
CAUTION: When an optional interface board is installed,
be sure to disconnect the printer cable from the printer's
built-in parallel interface. Two interface cables must not
be connected at the same time.
7. Reattach the printer cover and paper guide.
Using the Printer Options 5-57