48 ENGLISHTroubleshootingTroubleshootingWhat appears to be trouble is not always serious.Check the following points before calling a servicecenter.• For operations with external components, refer alsoto the instructions supplied with the adapters usedfor connection (as well as the instructions suppliedwith the external components).GeneralNo sound comes out of the speakers. Adjust the volume to the optimum level. Check the cords and connections.No picture is displayed on the screen. Turn on the screen. (Page 4)The remote controller* does not work. Replace the battery.“No Signal”/“No Video Signal” appears. Start playback on the external componentconnected to the AV-IN input terminal. Check the cords and connections. Signal input is too weak.“Miswiring DC Offset Error”/“Warning DC OffsetError” appears. A speaker cord has shorted or it has come intocontact with the car chassis. Wire or insulate thespeaker cord as appropriate, then turn the poweroff and on.“Parking off” appears. No playback picture is shown when the parkingbrake is not engaged.“Learning Process Failed” appears. Your steering remote controller is not compatible,learning may not be completed. Consult your caraudio dealer for details.* Purchase optional remote controller, KNA-RCDV331.USB“Reading” does not disappear from the screen. Turn the power off and on again.While playing a track, sound is sometimesinterrupted. The tracks are not properly copied into the USBdevice. Copy the tracks again, and try again.Tracks are not played back as you have intendedthem to play. Playback order may differ from the one played backusing other players.“USB device over current status detected” appearswhen you connect a USB device. The USB port is drawing more power than thedesign limit. Turn the power off and unplug the USB device.Then, turn on the power and reattach the USBdevice. If the above does not solve the problem, turn thepower off and on before replacing with anotherUSB device.iPod/iPhoneNo sound comes out of the speakers. Disconnect the iPod/iPhone, then connect it again. Select another source, then reselect “iPod”.The iPod/iPhone does not turn on or does notwork. Check the connection. Update the firmware version. Charge the battery. Reset the iPod/iPhone.Sound is distorted. Deactivate the equalizer either on this unit or theiPod/iPhone.A lot of noise is generated. Turn off (uncheck) “VoiceOver” on the iPod/ iPhone.For details, visit .No operations are available when playing back atrack containing artwork. Operate the unit after the artwork has loaded.“Authorization Error” appears. Check whether the connected iPod/iPhone iscompatible with this unit. (Page 47)