Sony XBR-55A1E Reference Guide - Page 12

 IR BLASTER*  REMOTE RS-232C REMOTE IR IN • These jacks are for receiving the external control signal. Enables extended control of the TV using RS­ 232C via the RS-232C and IR IN jacks. RS-232C: connect to the RS-232C terminal of the home controller. IR IN: connect to the IR out terminal of the home controller. • Take care to not connect to headphones or an external audio system.  / VIDEO IN • For a composite connection, use an Analog Extension Cable (not supplied). •  AUDIO OUT / • Supports 3-pole stereo mini jack only. • To listen to the TV's sound through the connected equipment, press HOME. Select [Settings]  [Sound]  [Headphone/Audio out] and then select the desired item.  USB 1/2, USB 3 • Connecting a large USB device may interfere with other connected devices beside it. • When connecting a large USB device, connect to the USB 1 port. * Only on limited region/country/TV model. 3.5 mm 12 34 1: L 2: Video 3: Ground 4: R  HDMI IN 1/2/3/4 • If connecting a digital audio system that is compatible with Audio Return Channel (ARC) technology, use HDMI IN 3. If not, an additional connection with DIGITAL AUDIO OUT (OPTICAL) is necessary. • < 12 mm < 21 mm 12US