4 | KDC-MP6539U/ KDC-MP6039General functionsPower/Source Select button [SRC]Turns on the power.When the power is ON, select a source.SRC Select mode 1: Press the [SRC] button and thenturn the Control knob or push it toward left or right.To determine the selected source, press the Controlknob.SRC Select mode 2: Pressing this button each timeswitches between sources.Tuner (“TUNER”) , USB*1 or iPod*1 (“USB” or “iPod”), CD(“Compact Disc”) , Auxiliary input (“AUX”), and Standby(“STANDBY”)Press at least 1 second to turn off the power.⁄• When the power is ON, the (page 12) isdisplayed as “CODE ON” or “CODE OFF”.• The SRC Select mode can be set in “MENU” > “SRC Select” of (page 6).• When an optional accessory is connected, the source namefor each device appears.• When connection of the iPod is recognized, the sourcedisplay changes from “USB” to “iPod”. * 1• USB*1 (iPod) source is recognized as CD source on theconnected unit.* 1 Function of KDC-MP6539U.Volume control [AUD]Turn the knob to adjust the volume.Attenuator [ATT]Turning the volume down quickly.When the volume is reduced, the “ATT” indicatorflashes.Muting volume upon reception of phone callWhen there is a call, “CALL” is displayed and the audiosystem is paused.When the call ends, “CALL” disappears and the audiosystem comes back on.The audio system comes back on when [SRC] ispressed during a call.⁄• To use the TEL Mute feature, you need to hook up the MUTEwire to your telephone using a commercial telephoneaccessory. Refer to (page23).Faceplate release ReleaseReleases the faceplate lock so that it can be removed.Refer to the following diagram when reattaching thefaceplate.¤• The faceplate is a precision piece of equipment and can bedamaged by shocks or jolts.• Keep the faceplate in its faceplate case while detached.• Do not place the faceplate (and the faceplate case) in areasexposed to direct sunlight, excessive heat or humidity. Alsoavoid places with too much dust or the possibility of watersplashing.• To prevent deterioration, do not touch the terminals of theunit or faceplate with your fingers.Auxiliary input Auxiliary inputConnect a portable audio device with mini-plugcable (3.5 ø).Basic OperationAUX[AUD][ ][ATT] [FNC][AUTO][SRC] ReleaseAuxiliary input(Rear side) Control knobUSB TerminalDisc slot