Panasonic CQ-5251JU warranty Troubleshooting, If You Suspect Something Wrong, Common

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 for those other than indicated by ital- ic 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.

Common

Problem

No power to the unit

Sound is not generated.

Noise

Noise is made in step with

engine revolutions.

Some operations are not

executable.

Possible cause a Possible solution

The power cord (battery, power and ground) is connected in the wrong way.

aCheck the wiring.

Fuse blows out.

aEliminate the cause of fuse blowout and replace the fuse with new one. Consult your dealer.

MUTE 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, insulate it.

The wiring of speaker lines are not correct, or a break or poor contact arises.

aCheck the wiring in accordance with the wiring diagram.

There is an electromagnetic-wave generator such as a cellular phone near the unit or its electrical lines.

aKeep 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.

aMake sure that the ground lead is connected to an unpainted part of the chas- sis securely.

Alternator noise comes from the car.

aChange the wiring position of the ground lead.

aMount a noise filter on the power supply.

Some operations are not executable in particular modes such as menu mode.

aRead the operating instructions carefully and cancel the mode. If the unit is still out of order, consult your dealer.

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