Epson Personal Document Station Getting Started Manual page 6

Carefully remove the interface board from its packaging,
holding it only by its top edges. Then place it on a flat,
clean surface.
Locate jumpers J1 and J2 on the interface board, as shown
below.
The settings are printed on the circuit board next to the
jumpers. To change a setting, lift off the jumper cap and
reinstall it over the appropriate pair of pins.
Caution:
Be careful not to bend the jumper pins.
4 Getting Started
Caution:
Avoid touching the components or the gold contacts on the
interface board; they can be damaged by static electricity.
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