Do you have a question about the JBL PSB-1 and is the answer not in the manual?
Setup for TVs with variable audio output for direct TV volume control.
Setup for TVs with fixed audio output, requiring soundbar volume control.
Switch to select volume control between the TV source and the soundbar.
4-position switch to limit the maximum loudness of the soundbar.
Troubleshooting steps for when the soundbar does not produce any audio.