Panasonic CQC3305U CQC3305U User Guide - Page 13

Troubleshooting If You Suspect Something Wrong Check and take steps as described below. If the described suggestions do not solve the problem, it is recommended to take the unit to your nearest authorized Panasonic Servicenter. The product should be serviced only by qualified personnel. Please refer the checking and the repair to professionals. Panasonic shall not be liable for any accidents arising out of neglect of checking the unit or your own repair after your checking. Never take measures especially those other than indicated by italic letters in "Possible solution" described below because those are too dangerous for users to handle themselves. Warning • Do not use the unit in an irregular condition, for example, without sound, or with smoke or a foul smell, which can cause ignition or electric shock. Immediately stop using the unit and consult your dealer. • Never try to repair the unit by yourself because it is dangerous to do so. Problem No power to the unit Sound is not generated. Possible cause  Possible solution The power cord (battery, power and ground) is connected in 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. MUTE is set to ON.  Set MUTE to OFF. The wiring of speaker lines are not correct, or a break or poor contact arises.  Check the wiring in accordance with the wiring diagram. ( Installation Instructions) Noise Noise is made in step with engine revolutions. There is an electromagnetic-wave generator such as a cellular phone near the unit or its electrical lines.  Keep an electromagnetic-wave generator such as a cellular phone away from the unit and the wiring of the unit. In case that noise cannot be eliminated 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 the chassis securely. Alternator noise comes from the car.  Change the wiring position of the ground lead.  Mount a noise filter. Common 24 CQ-C3405U/C3305U Radio Common (continued) Problem Some operations are not executable. No sound from speaker(s) Possible cause  Possible solution Some operations are not executable in particular modes such as menu mode.  Read the operating instructions carefully and cancel the mode. If the unit is still out of order, consult your dealer. Balance/Fader setting is not appropriate.  Readjust Balance/Fader. There is a break, a short circuit, poor contact or wrong wiring regarding the speaker wiring.  Check the speaker wiring. The speaker channels are reversed between right and left. The speaker wiring is confused between right and left.  Perform the speaker wiring in accordance with the wiring diagram. The sound field is not clear in the stereo mode. Central sound does not settled. The plus and minus terminals at right and left channels of speakers are connected reversely.  Perform the speaker wiring in accordance with the wiring diagram. The power fails unintentionally. The safety device works.  Consult your dealer, or your nearest Panasonic Servicenter. Poor reception or noise Antenna installation or wiring of antenna cable is faulty.  Check whether the antenna mounting position and its wiring are correct. In addition, check to see whether the antenna ground is securely connected to the chassis. No power is supplied to the antenna amplifier (when using a film antenna, etc.).  Check the wiring of the antenna power lead. The number of auto preset stations is less than 6. The number of receivable stations is less than 6.  Move to an area where receivable stations number is maximum, and try presetting. Preset stations cannot be stored. The contact of the battery lead is poor, or the battery lead is not always powered.  Make sure that the battery lead is connected securely, and preset stations again. CQ-C3405U/C3305U 25 Troubleshooting English