English | 13Selecting the SourcePress the [SRC] button.Source required DisplayTuner "TUNER"CD "Compact Disc"External disc (Optional accessory) "CD Changer"Auxiliary input "AUX"Standby (Illumination only mode) "STANDBY"• This unit automatically turns full power OFF after 20minutes lapses in Standby mode in order to save thevehicles battery.The time until full power OFF can be set in 'Power OFFTimer' (page 52).VolumeIncreasing VolumeTurn the [VOL] knob clockwise.Decreasing VolumeTurn the [VOL] knob counterclockwise.AttenuatorTurning the volume down quickly.Press the [ATT] button.Each time the button is pressed the Attenuatorturns ON or OFF.When it’s ON, "ATT" is displayed.Rotary Volume knob operationmode selectThe rotary volume knob can be used for volumeadjustment and various function setups.Available setup functionsThe rotary volume knob can be used for thefollowing setup:• Menu system : Item selection• Audio Control : Adjustment of setup value• Audio Setup : Adjustment of setup value• Display control : Display switching• Disc Naming : Character selection• Folder select : Folder search• You can select the Rotary Volume Operation modeonly when the " " indicator is displayed abovethe [1] button during any function setup.• When the " " indicator is ON, you cannot use therotary volume control for function setup and soundlevel adjustment.To use the rotary volume knob:1 Turn the rotary volume operation ONSee the 'Rotary volume operation select' (54page) and select "Rotary SEL: ON".2 Selecting the Rotary Volume OperationmodePress the [1] button.When it’s ON, the " " indicator blinks.3 Setting the functionRotate the Rotary Volume knob.4 Terminates the function setup using therotary volume knobPress the [1] button.