One Device Setup - Nakamichi Shockwafe Pro 7.1 User Manual

If your TV is previously connected to a sound system or soundbar, disconnect the TV AC Power cord from the wall for one
minute. Plug the TV power back in and then connect the HDMI ARC to the Soundbar to ensure proper HDMI handshake.
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If the device is not equipped with a HDMI port, use an Optical or Coaxial output.
ARC)
HDMI OUT [1]
(ARC TO TV)