Optoma EP771 User Manual page 18

I L
TEM ABEL
USB
12V
RS-232
Warning:
As a safety precaution, disconnect all power to the projector and connecting devices before making
connections.
Connect the supplied USB cable from a computer for USB mouse func-
tion and firmware upgrades.
Connect a 12-volt trigger cable from the screen to this connector. When
connected, the screen automatically adjusts vertically to match the
screen aspect ratio.
Reserved for installation control.
Setup and Operation
D
ESCRIPTION
18