Epson Endeavor L User Manual page 60

3. A jumper's setting is determined by where the jumper is
placed on the pins. For three-pin jumpers, the jumper
connects the first pin and the middle pin (position A) or the
last pin and the middle pin (position B), as shown below.
(Look for A and B printed on the system board to help you
identify each position.)
In the off position, a three-pin jumper sits on only one of the
end pins. To move a jumper from one position to the other,
use needle-nose pliers or tweezers to pull it off its pins and
gently move it to the desired position.
Caution
Be careful not to bend the jumper pins or damage any
surrounding components on the main system board.
4. Replace any option cards you removed. See page 4-15 for
instructions.
Installing and Removing Options
4-9