Panasonic SC-BTT490 Owner's Manual page 16

Other device connection
∫ When the connecting devices have an HDMI terminal
e.g.,
AV IN
(ARC)
HDMI cable
(not supplied)
HDMI standby pass-through
Even if this system is in standby mode, the audio and/or video signal from the device connected to the HDMI1 IN (CABLE/SAT)
or HDMI2 IN terminal will be sent to the TV connected to the HDMI AV OUT terminal (the sound will not be output from this
system). Even while the unit is in the standby mode, you can change the input signal HDMI1 IN (CABLE/SAT) or HDMI2 IN by
pressing [EXT-IN] on the remote control.
∫ When the connecting devices do not have an HDMI terminal
e.g.,
VQT3X49
16
Set Top Box, etc.
AV OUT
HDMI cable
(not supplied)
Set Top Box, etc.
OPTICAL
OUT
Video game, etc.
AV OUT
Optical digital audio cable
(not supplied)