Optoma Technology TX771, EP771RFBA manual Setup and Operation

		Setup and Operation
ITEM	LABEL	DESCRIPTION
	USB	Connect the supplied USB cable from a computer for USB mouse func-
		tion and firmware upgrades.
	12V	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.
	RS-232	Reserved for installation control.

Warning:

As a safety precaution, disconnect all power to the projector and connecting devices before making connections.

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