Panasonic CQC5403U CQC5403U User Guide - Page 32

Troubleshooting - cq c5403u wiring diagrams

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E N G Troubleshooting L I S H If You Suspect Something Wrong 31 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. ■ Common Problem No power to the unit Sound is not generated. Noise Noise is made in step with engine revolutions. Some operations are not executable. Possible cause a Possible solution 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. The wiring of speaker lines is 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 eliminated 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. 32 CQ-C5403U/C5303U

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31
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CQ-C5403U/C5303U
Troubleshooting
If You Suspect Something Wrong
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
Servicenter. The product should be serviced only by qualified
personnel. Please refer the checking and the repair to profes-
sionals. 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 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.
■
Common
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.
Some operations are
not executable.
Alternator noise comes from the car.
a
Change the wiring position of the ground lead.
a
Mount a noise filter on the power supply.
Noise is made in step
with engine revolu-
tions.
There is an electromagnetic-wave generator such as a cellular phone near the
unit or its electrical lines.
a
Keep 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.
a
Make sure that the ground lead is connected to an unpainted part of the
chassis securely.
Noise
MUTE is set to ON.
a
Set MUTE to OFF.
The wiring of speaker lines is not correct, or a break or poor contact arises.
a
Check the wiring in accordance with the wiring diagram. (Installation
Instructions)
Sound is not generat-
ed.
The power cord (battery, power and ground) is connected in the wrong way.
a
Check the wiring.
Fuse blows out.
a
Eliminate the cause of fuse blowout and replace the fuse with new one.
Consult your dealer.
No power to the unit
Problem
Possible cause
a
Possible solution