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CQ-VD7003U
English
Tr oubleshooting
■ Common
❑ If You Suspect Something Wrong
Check 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 Panasonic
Servicenter. The product should be serviced only by qualified per-
sonnel. Please refer checking and repair to professionals.
Panasonic shall not be liable for any accidents arising out of neg-
lect 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 condi-
tion, 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
Possible cause
a
Possible solution
No power to the unit
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.
Sound is not
generated.
MUTE is set to ON.
aSet MUTE to OFF.
The wiring of speaker lines is not correct, or a break or poor contact arises.
aCheck the wiring in accordance with the wiring diagram. (Installation
Instructions)
Noise
There is an electromagnetic-wave generator such as a cellular phone near the unit
or its electrical lines.
aKeep the electromagnetic-wave generator such as a cellular phone away
from the unit and the wiring of the unit. In case 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
chassis securely.
Noise is made in step
with engine revolutions.
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.
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.
No sound from
speaker(s)
There is a break, a short circuit, poor contact or wrong wiring regarding the
speaker wiring.
aCheck the speaker wiring.