Panasonic CQ-C9801U - Manual (Page 22)

CQ-C9901U/C9801U/C9701U CQ-C9901U/C9801U/C9701U 43 42
English
Tr
oubleshooting
Common (continued)
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. If the unit is
still out of order, consult your dealer.
Problem Possible cause a Possible solution
No sound from
speaker (s)
Balance/Fader setting is not appropriate.
a Readjust Balance/Fader.
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 reversed 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 is
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 of the
unit fails
unintentionally.
The safety device works.
a Consult your dealer, or your nearest Panasonic Servicenter.
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
Servicenter. The product should be serviced only by qualified 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.
Warning
¡ 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 consult your
dealer.
¡ Never try to repair the unit by yourself because it is
dangerous to do so.
Problem Possible cause a Possible solution
Common
No power to the
unit
The power cord (battery, power 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.
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)
BUILT-IN AMP is set to ON.
a Set BUILT-IN AMP to OFF. Observe that “AMP OFF” is displayed on the
screen.
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.
Disc unejectable
Something such as a peeled label obstructs the disc coming out.
a Press and hold the [OPEN] for more than 2 seconds when the face plate is
open (disc forced ejection). In case that the disc forced ejection does not
work, consult your dealer.
The microcontroller in the unit operates abnormally due to noise or other factors.
a Unplug the power cord and plug it again. In case the unit is still out of order,
consult your dealer.
Playing sound is
interrupted
An inappropriate speaker network (device) is used.
a Use a speaker without any speaker network, or use an appropriate speaker
network system that does not cause interruption.