Troubleshooting - Panasonic CQ-C3401U Operating Instructions Manual

Troubleshooting

E
N
G
L
I
If You Suspect Something Wrong
S
H
Check and take steps as described below.
29
If the described suggestions do not solve the problem, it is recom-
mended to take the unit to your nearest authorized Panasonic
Servicenter. The product should be serviced only by qualified per-
sonnel. 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.
■
Common
Problem
No power to the unit
Sound is not
generated.
The demonstration
screen displayed and
no operable.
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.
30
CQ-C3401U/C3301U
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)
You cannot operate the unit while the demonstration screen appears.
aPress [DISP] to end the demonstration screen.
If the demonstration screen appears frequently, there is a possibility that poor
contact or wrong wiring arises between the battery lead of the unit and the
battery cable of the car. (The battery lead should be always powered.)
aCheck the battery 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 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.
Balance/fader setting is not appropriate.
aReadjust Balance/fader.
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.
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 elec-
tric 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.
Possible solution
a
(a Installation