Troubleshooting - Panasonic CQ-C5303N Operating Instructions Manual

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Troubleshooting

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S
If You Suspect Something Wrong
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37 1
Check and take steps as described below.
If the described suggestions do not solve the problem, it is rec-
ommended to take the unit to your nearest authorized Panasonic
Service . The product should be serviced only by qualified
Centre
personnel. Please refer checking and 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 check-
ing.
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.
■
Common
Problem
No power to the unit
Sound is not generat-
ed.
Noise
Noise is made in step
with engine revolu-
tions.
Some operations are
not executable.
38
CQ-C5303N
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.
There is contact between the external mute lead and the chassis.
aConnect 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.
aCheck the wiring in accordance with the wiring diagram. (Installation
Instructions)
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 elimi-
nated 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.
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