Panasonic CQ-C7405W Operating Instructions Manual

Also see for CQ-C7405W: Service manual

Panasonic CQ-C7405W Operating Instructions Manual Manual pdf 32 page image

32 CQ-C7405WIf You Suspect Something WrongCheck and take steps as described below.If the described suggestions do not solve the problem, it isrecommended to take the unit to your nearest authorized PanasonicService Center. The product should be serviced only by qualifiedpersonnel. Please refer the checking and the repair to professionals.Panasonic shall not be liable for any accidents arising out of neglect ofchecking the unit or your own repair after your checking.Never take measures especially for those other than indicated by ital-ic letters in “Possible Solution” described below because those aretoo dangerous for users to handle themselves.Warning¡ Do not use the unit in an irregular condition, forexample, without sound, or with smoke or a foulsmell, which can cause ignition or electric shock.Immediately stop using the unit and consult yourdealer.¡ Never try to repair the unit by yourself because it isdangerous to do so.Problem Possible cause a Possible solutionCommonNo power to theunitThe power cord (battery, power and ground) is connected in the wrong way.a Check the wiring.Fuse blows out.a Eliminate the cause of fuse blowout and replace the fuse with new one.Consult your dealer.Sound is notgenerated.MUTE is set to ON.a Set MUTE to OFF.The wiring of speaker lines are not correct, or a break or poor contact arises.a Check the wiring in accordance with the wiring diagram. (InstallationInstructions)NoiseThere is an electromagnetic-wave generator such as a cellular phone near the unit orits electrical lines.a Keep an electromagnetic-wave generator such as a cellular phone away fromthe unit and the wiring of the unit. In case that noise cannot be eliminateddue to the wiring harness of the car, consult your dealer.The contact of the ground lead is poor.a Make sure that the ground lead is connected to an unpainted part of the chas-sis securely.Noise is made instep with enginerevolutions.Alternator noise comes from the car.a Change the wiring position of the ground lead.a Mount a noise filter on the power supply.Troubleshooting