Panasonic CQC300U Auto Radio/cd/mp3 Deck - Page 24

Troubleshooting - wiring

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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. 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. 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. Problem No power to the unit Sound is not generated. Possible cause  Possible solution The power cord (battery, power and ground) is connected in the wrong way.  Check the wiring. Fuse blows out.  E liminate the cause of fuse blowout and replace the fuse with new one. Consult your dealer. MUTE is set to ON.  S et MUTE to OFF. The wiring of speaker lines are not correct, or a break or poor contact arises.  C heck the wiring in accordance with the wiring diagram. ( Installation Instructions) Noise Noise is made in step with engine revolutions. There is an electromagnetic-wave generator such as a cellular phone near the unit or its electrical lines.  K eep 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.  M ake sure that the ground lead is connected to an unpainted part of the chassis securely. Alternator noise comes from the car.  C hange the wiring position of the ground lead.  M ount a noise filter. Common 24 CQ-C300U

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CQ-C300U
24
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.
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 filter.
Common
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.