Troubleshooting - Panasonic C9701U Operating Instructions Manual

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.
Problem
The power cord (battery, power and ground) is connected in the wrong way.
a Check the wiring.
No power to the
Fuse blowout
unit
a Eliminate the cause of fuse blowout and replace the fuse with new one.
Consult your dealer.
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.
Sound is not
a Check the wiring in accordance with the wiring diagram. (Installation
generated. Instructions)
BUILT-IN AMP is set to ON.
a Set BUILT-IN AMP to OFF. Observe that "AMP OFF" is displayed on the
screen.
You cannot operate the unit while the demonstration screen appears.
a Press [DISP] to end the demonstration screen.
The demonstration
If the demonstration screen appears frequently, there is a possibility that poor
screen displayed
contact or wrong wiring arises between the battery lead of the unit and the battery
and no operable
cable of the car. (The battery lead should be always powered.)
a Check 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.
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
Noise
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
Alternator noise comes from the car.
step with engine
a Change the wiring position of the ground lead.
revolutions. a Mount a noise filter on the power supply.
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CQ-C9901U/C9801U/C9701U
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.
Possible cause Possible solution
a
Problem
Possible cause
Some operations are not executable in particular modes such as menu mode.
Some operations
a Read the operating instructions carefully and cancel the mode.
are not executable.
still out of order, consult your dealer.
Balance/Fader setting is not appropriate.
Readjust Balance/Fader.
a
No sound from
There is a break, a short circuit, poor contact or wrong wiring regarding the speaker
speaker (s)
wiring.
a Check the speaker wiring.
The speaker
channels are
The speaker wiring is reversed between right and left.
reversed between
a Perform the speaker wiring in accordance with the wiring diagram.
right and left.
The sound field is
not clear in the
The plus and minus terminals at right and left channels of speakers are connected
stereo mode. reversely.
Central sound is a Perform the speaker wiring in accordance with the wiring diagram.
not settled.
The power of the
The safety device works.
unit fails
a Consult your dealer, or your nearest Panasonic Servicenter.
unintentionally.
An inappropriate speaker network (device) is used.
Playing sound is
a Use a speaker without any speaker network, or use an appropriate speaker
interrupted
network system that does not cause interruption.
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.
Disc unejectable
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.
CQ-C9901U/C9801U/C9701U
a Possible solution
If the unit is
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