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CQ-C3305W
22
CQ-C3305W
23
English
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 Service Center. The product should be serviced only
by qualifi ed 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.
Problem Possible cause Possible solution
No power to the unit
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.
Sound is not
generated.
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
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.
Noise is made in
step with engine
revolutions.
Alternator noise comes from the car.
Change the wiring position of the ground lead.
Mount a noise fi lter.
Common
Troubleshooting
Problem Possible cause Possible solution
Some operations are
not executable.
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.
No sound from
speaker(s)
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 fi eld 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 Service Center.
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 amplifi er (when using a fi lm 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.
Common (continued)Radio
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.