Epson LX-810 User Manual page 168

Interface Boards
Installing the board
There are two basic interface board designs, which differ with
respect to how the frame ground (FG) wire is attached. This slight
difference changes the way the boards are installed in the printer,
but does not affect the operation of the interface in any way.
Check to see which type of interface board you have.
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Using the Printer Options
FG wire not attached
See the next page
FG wire attached
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