15
LC-43LBU591U / LC-50LBU591U / LC-55LBU591U / LC-65LBU591U
LC-43LBU591C / LC-50LBU591C / LC-55LBU591C / LC-65LBU591C
Jacks
Note
For better picture quality, we recommend that 
you use cables designated as High Speed HDMI® 
cables.
# Item Description
1 USB
Connect a USB flash drive to this jack 
to view compatible photos and 
video, listen to music files, or pause 
live TV. For more information, see 
Connecting a USB flash drive on 
page 29 .
2
LINE OUT
Connect an analog soundbar, 
speaker system, or home theater 
system to this jack to listen to TV 
audio through external speakers. For 
more information, see Analog audio 
using the LINE OUT jack on page 34.
3
VIDEO
L and R AUDIO
Connect an AV device to these jacks. 
For more information, see AV (good) 
on page 20, 24, or 26.
4
RESET
Press and hold reset for 15 seconds 
for factory reset.
43"/50"/55" models
65" model
5 ANT/CABLE IN
Connect an antenna or cable TV to 
this jack. For more information, see 
Coaxial (good) on page 21 or 
Connecting an antenna or cable TV 
(no box) on page 22.
6
HDMI1/ARC
HDMI 2
HDMI 3
Connect HDMI® devices to these 
jacks. For more information, see 
HDMI® (best) on pages 19, 23, or 25 
or Connecting a computer on 
page 28.
Connect an ARC-enabled home 
theater receiver to the HDMI1/ARC 
jack. For more information, see 
Digital audio using the HDMI 1/ARC 
jack on page 32.
7
DIGITAL OUTPUT 
(OPTICAL)
Connect a digital sound bar, speaker 
system, or home theater system to 
this jack to listen to TV audio through 
external speakers. For more 
information, see Digital audio using 
the DIGITAL OUTPUT (OPTICAL) jack 
on page 31.
8
Connect headphones to this jack. See 
Connecting headphones on page 30.
OR
Connect an analog sound bar, 
speaker system, or home theater 
system to this jack to listen to TV 
audio through external speakers. For 
more information, see Analog audio 
using the headphone jack on 
page 33.
9 ETHERNET
Connect a network router to this jack 
to use a wired network connection to 
access your Roku account. For more 
information, see Connecting a 
network router on page 27.
# Item Description