Trouble Shooting
❑
If You Suspect Something Wrong
Check and take steps as described below.
If the described suggestions do not solve the problem, it is recom-
51
mended 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 neglect of check-
ing the unit or your own repair after your checking.
■
Common
Problem
No power to the unit
Sound is not
generated.
Noise
Noise is made in step
with engine revolu-
tions.
Some operations are
not executable.
No sound from
speaker(s)
The speaker channels
are reversed between
right and left.
The sound field is not
clear in the stereo
mode. Central sound is
not settled.
The power of the unit
fails unintentionally.
52
CQ-VD7001U
¡Do not use the unit in an irregular condition,
¡Never try to repair the unit by yourself
Possible cause
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.
The wiring of speaker lines is not correct, or a break or poor contact arises.
aCheck the wiring in accordance with the wiring diagram.
Instructions)
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. If 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.
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.
There is a break, a short circuit, poor contact or wrong wiring regarding the
speaker wiring.
aCheck the speaker wiring.
The speaker wiring is reversed between right and left.
aPerform the speaker wiring in accordance with the wiring diagram.
The plus and minus terminals at right and left channels of speakers are con-
nected reversely.
aPerform the speaker wiring in accordance with the wiring diagram.
The safety device works.
aConsult your dealer, or your nearest Panasonic Servicenter.
Warning
for example, without sound, or with smoke or
a foul smell, which can cause ignition or elec-
tric shock. Immediately stop using the unit
and consult your dealer.
because it is dangerous to do so.
Possible solution
a
(a
Installation