40 4131ENGLISH32ENGLISHCQ-C3300/C3100A/C3100G/C3100VNCQ-C3300/C3100A/C3100G/C3100VNTroubleshootingIf You Suspect Something WrongCheck and take steps as described below.If the described suggestions do not solve the problem, it is rec-ommended to take the unit to your nearest authorized PanasonicService Centre. The product should be serviced only by qualifiedpersonnel.Caution:¡Do not use the unit in an irregular condition,for example, without sound, or with smoke orfoul smell, which can cause ignition or electricshock. Immediately stop using the unit andcall the store where you purchased it.¡Never try to repair the unit by yourselfbecause it is dangerous to do so.■ CommonSome operations are not executable in particular modes such as menu mode.aRead the operating instructions carefully and cancel the mode. In casethe unit is still out of order, consult the dealer.Some operations arenot executable.Alternator noise comes from the car.aChange the wiring position of the ground lead.aMount a noise filter on the power supply.Noise is made in stepwith engine revolu-tions.There is an electromagnetic-wave generator such as a cellular phone near theunit or its electrical lines.aKeep an electromagnetic-wave generator such as a cellular phone awayfrom the unit and the wiring of the unit. In case that noise cannot beeliminated due to the wiring harness of the car, consult your dealer.The contact of the ground lead is poor.aMake sure that the ground lead is connected to an unpainted part of thechassis securely.NoiseYou cannot operate the unit while the demonstration screen appears.aPress [DISP] to end the demonstration screen.If the demonstration screen appears frequently, there is a possibility that poorcontact or wrong wiring arises between the battery lead of the unit and thebattery cable of the car. (The battery lead should be always powered.)aCheck the battery wiring in accordance with the wiring diagram.The demonstrationscreen displayed andno operableMUTE is set to ON.aSet MUTE to OFF.There is contact between the external mute lead and the chassis.aConnect the external mute lead correctly. If the lead is unused, insulateit.The wiring of speaker lines are not correct, or a break or poor contact arises.aCheck the wiring in accordance with the wiring diagram. (InstallationInstructions)Sound is not generat-ed.The power cord (battery, ACC and ground) is connected in the wrong way.aCheck the wiring.Fuse blowoutaEliminate the cause of fuse blowout and replace the fuse with new one.Consult your dealer.No power to the unitProblem Possible cause a Possible solution■ Common (continued)The plus and minus terminals at right and left channels of speakers are con-nected reversely.aPerform the speaker wiring in accordance with the wiring diagram.The sound field is notclear in the stereomode. Central sound isnot settled.The speaker wiring is confused between right and left.aPerform the speaker wiring in accordance with the wiring diagram.The speaker channelsare reversed betweenright and left.BAL/FAD setting is not appropriate.aReadjust BAL/FAD.There is a break, a short circuit, poor contact or wrong wiring regarding thespeaker wiring.aCheck the speaker wiring.No sound from speak-er(s)Problem Possible cause a Possible solution■ RadioThe contact of the battery lead is poor, or the battery lead is not always pow-ered.aMake sure that the battery lead is connected securely, and preset sta-tions again.Preset stations cannotbe stored.The number of receivable stations is less than 6.aMove to an area where receivable stations number is maximum, and trypresetting.The LOCAL mode is active.aCancel the LOCAL mode.The number of autopreset stations is lessthan 6.The LOCAL mode is active.aCancel the LOCAL mode.Only nearby stationscan be received.The MONO mode is active.aCancel the MONO mode.Stereo broadcast isreceived only in mono.Antenna installation or wiring of antenna cable is faulty.aCheck whether the antenna mounting position and its wiring are correct.In addition, check to see whether the antenna ground is securely con-nected to the chassis.No power is supplied to the antenna amplifier (when using a film antenna,etc.).aCheck the wiring of the antenna battery lead.Poor reception ornoiseProblem Possible cause a Possible solution