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Troubleshooting
Preliminary Steps
Check and take steps as described in the tables below.
If You Suspect Something Wrong
Immediately switch the power off.
Disconnect the power connector and check that there is
neither smoke nor heat from the unit before asking for
repairs. Never try to repair the unit by yourself because it
is dangerous to do so.
Note: For whatever is printed in italics in "Cause/Step"
column, conduct the operations and checks by yourself.
Troubleshooting Tips
❐ Common
Trouble
Vehicle's ignition switch is not on.
a
Turn your vehicle's ignition switch to ACC or ON.
Cables are not correctly connected.
a
Connect cables correctly.
Power connector is not correctly connected.
No power.
a
Connect the power connector to the terminal that is always active.
Power connector is not correctly connected.
a
Connect the power connector to your vehicle's ACC source.
Grounding wire is not correctly connected.
a
Connect the grounding wire to a metal part of the vehicle.
Mute is set to ON.
a
Set it to OFF.
No sound.
Cables are not correctly connected.
Connect cables correctly.
a
The ground lead is not connected properly.
Noise.
a
Connect the ground lead properly.
❐ Radio
Trouble
Station is too far, or signals are too weak.
Much noise in FM stereo
a
Select other stations of higher signal level.
and monaural broad-
The radio antenna is not extended enough.
casts.
a
Extend fully the radio antenna.
Battery cable is not correctly connected.
Preset station is reset.
a
Connect the battery cable to the terminal that is always active.
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CR-W402U
Cautions:
• Do not use the unit if it malfunctions or if there is
something wrong.
• Do not use the unit in irregular condition, for
example, without sound, or with smoke or foul
smell, which can cause ignition or electric shock.
Immediately stop using it and call the store where
you purchased it.
Cause/Step
Cause/Step
❐ Sound Setting
Trouble
Left and right balance, or front and rear balance is off on one side.
Adjust BAL/FAD as appropriate.
a
No sound from left, right,
front, or rear speaker.
Cables are not correctly connected.
a
Connect the cables correctly.
Left and right sounds are
The right speaker wire is connected to the left speaker and the left speaker
reversed in stereo
wire to the right speaker.
Connect the speaker wires to the correct ones.
listening.
a
Product Servicing
If the suggestions in the charts do not solve the problem, we recommend that you take it to your nearest authorized
Panasonic Servicenter. The product should be serviced only by a qualified technician.
Cause/Step
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CR-W402U
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