See also:

Operation
Press to operate the air quality sensor (normal setting). or: Select one of the following three functions by pressing 1, 2 or 3 times. 1. The AUT LED lights. The air quality sensor is now acti ...

External audio source volume
If an external devices such as an MP3 player or an iPod is connected to the AUX socket, the device's volume may be different from the volume of the internal sound sources such as the disc play ...

Basic sound settings
Press SOUND to display the basic sound setting menu (Bass, Treble, etc). Continue pressing SOUND or OK/MENU to display the other setting alternatives. Adjust the setting by turning TUNE and save th ...