Panasonic CQ-C7300N - Manual (Page 17)

33
English
Some operations
are not
executable.
Some operations are not executable in particular modes such as menu mode.
a Read the operating instructions carefully and cancel the mode. In case the
unit is still out of order, consult the dealer.
Problem Possible cause a Possible solution
No sound from
speaker(s)
BAL/FAD setting is not appropriate.
a Readjust BAL/FAD.
There is a break, a short circuit, poor contact or wrong wiring regarding the speaker
wiring.
a Check the speaker wiring.
The speaker
channels are
reversed between
right and left.
The speaker wiring is confused between right and left.
a Perform the speaker wiring in accordance with the wiring diagram.
The sound field 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.
a Perform the speaker wiring in accordance with the wiring diagram.
The power fails
unintentionally.
The safety device works.
a Call the store where you purchased the unit, or your nearest Panasonic
Service Centre.
Poor reception or
noise
Antenna installation or wiring of antenna cable is faulty.
a 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 amplifier (when using a film antenna, etc.).
a Check the wiring of the antenna battery lead.
Stereo broadcast
is received only in
mono.
The MONO mode is active.
a Cancel the MONO mode.
Only nearby
stations can be
received.
The LOCAL mode is active.
a Cancel the LOCAL mode.
Common (continued)
Radio
32
Tr
oubleshooting
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 Centre. The product should be serviced only by qualified
personnel.
Cautions:
¡ Do not use the unit in an irregular condition, for
example, without sound, or with smoke or foul
smell, which can cause ignition or electric shock.
Immediately stop using the unit and call the store
where you purchased it.
¡ 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, ACC and ground) is connected in the wrong way.
a Check the wiring.
Fuse blowout
a 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.
a Set MUTE to OFF.
There is contact between the external mute lead and the chassis.
a Connect 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.
a Check the wiring in accordance with the wiring diagram. (Installation
Instructions)
The demonstration
screen displayed
and no operable
You cannot operate the unit while the demonstration screen appears.
a Press [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.)
a Check the battery wiring in accordance with the wiring diagram.
Noise
There is an electromagnetic-wave generator such as a cellular phone near the unit or
its electrical lines.
a 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.
a Make sure that the ground lead is connected to an unpainted part of the chas-
sis securely.
Noise is made in
step with engine
revolutions.
Alternator noise comes from the car.
a Change the wiring position of the ground lead.
a Mount a noise filter on the power supply.
Troubleshooting
Common