Epson EMP-7550 Owner's Manual page 27

3. Turn the projector so that the lens is at right angles to the
screen. If the projector is not angled correctly, the screen
image will be crooked.
4. Connect one end of the power cable to the projector's
power connector. Connect the other end to an earthed
electrical socket.
The projector should be in sleep mode, indicated by an
orange power indicator.
Warning: Never look into the lens when the projector is on.
There is a risk that the projector might come on suddenly even
though it is not in use. The light from the lamp can damage your
eyes. It is especially important that children should not be
allowed to look into the lens.
Setting Up the Projector 5