If you suspect something wrongCheck and take steps as described below.If the described suggestions do not solve the problem,it is recommended to take the unit to your nearestauthorized Panasonic Servicenter. The product shouldbe serviced only by qualifi ed personnel. Please referchecking and repair to professionals.Panasonic shall not be liable for any accidents arisingout of neglect of checking the unit or your own repairafter your checking.Never take measures except those indicated byitalic letters in “Possible solution” described belowbecause those are too dangerous for users to handlethemselves.Warning If the unit is out of order (no power, no sound) orin an abnormal state (has foreign objects in it, isexposed to water, is smoking, or smells), turn itoff immediately and consult your dealer. Do not disassemble, modify the unit or attempt torepair the product yourself. If the product needs tobe repaired, consult your dealer or an authorizedPanasonic Servicenter.CommonProblem Possible cause Possible solutionNo power to the unit The power cord (battery, power and ground) is connected the wrong way. Check the wiring. Fuse blows out. Eliminate the cause of fuse blowout and replace the fuse with new one.Consult your dealer. The vehicle engine is not running. Start the engine. (ACC ON is also usable.)Sound is notgenerated. The wiring of speaker lines is not correct, or a break or poor contact exists. Check the wiring in accordance with the wiring diagram. (InstallationInstructions) Turn the volume up.Noise There is an electromagnetic-wave generator such as a cellular phone near the unitor its electrical lines. Keep the electromagnetic-wave generator such as a cellular phone awayfrom the unit and the wiring of the unit. In case the noise cannot beeliminated due to the wiring harness of the car, consult your dealer. The contact of the ground lead is poor. Make sure that the ground lead is connected to an unpainted part of thechassis securely.Noise is made instep with enginerevolutions. Alternator noise comes from the car. Change the wiring position of the ground lead. Mount a noise fi lter.Some operations arenot executable. Some operations are not executable in particular modes such as menu mode. Read the Operating Instructions carefully and cancel the mode. If the unit isstill out of order, consult your dealer.No sound fromspeaker(s) There is a break, a short circuit, poor contact or wrong wiring regarding thespeaker wiring. Check the speaker.The power of the unitfails unintentionally. The safety device works. Consult your dealer, or your nearest Panasonic Servicenter.TroubleshootingEnglish9898