Panasonic CQ-C5410 Manuel D'instructions page 19

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Troubleshooting
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Preliminary Steps
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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.
Troubleshooting Tips
o Common
Problem Possible cause
No power to the unit The power cord (battery, ACC and
ground) is connected in the wrong
way.
Fuse blow out.
The Power fails The safety device works.
unintentionally
Sound is not MUTE is set to ON.
generated.
The wiring of the speaker lines
are not correct, or a break or poor
contact arises.
The demonstration You cannot operate the unit while
screen displayed and the demonstration screen appears.
no operable.
If the demonstration screen appears
frequently, there is a possibility that
poor contact or wrong wiring arises
between the battery lead of the unit
and the battery cable of the car.
(The battery lead should be always
powered.)
Some operations are Some operations are not
not executable. executable in particular modes
such as menu mode.
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Caution:
≥ Do not use the unit if it malfunctions or if
there is something wrong.
≥ Do not use the unit in abnormal 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.
Possible solution
Check the wiring.
Eliminate the cause of fuse blow out
and replace the fuse with new one.
Consult your dealer.
Call the store where you purchased
the unit, or your nearest Panasonic
Servicenter.
Set MUTE to OFF.
Check the wiring in accordance with
the wiring diagram.
Press [DISP] (display) to end the
demonstration screen.
Check the battery wiring in accordance
with the wiring diagram.
Read the operating instructions
carefully and cancel the mode. In case
the unit is still out of order, consult
the dealer.
Problem Possible cause
Noise There is an electromagnetic-wave
generator such as a cellular phone
near the unit or its electrical lines.
The contact of the ground lead is
poor.
Noise is made in Alternator noise comes from the
step with engine car.
revolutions.
No sound from Balance/fader setting is not
speaker (s) appropriate.
There is a break, a short circuit,
poor contact or wrong wiring
regarding the speaker wiring.
Some speakers are out of order.
The speaker channels The speaker wiring is confused
are reversed between between right and left.
right and left.
o Radio
Poor reception or Antenna installation or wiring of
noise antenna cable is faulty.
No power is supplied to the
antenna amplifi er (when using a
fi lm antenna, etc.).
The number of auto The number of receivable stations
preset stations are are less than 6.
less than 6.
Preset stations cannot The contact of the battery lead is
be stored. poor, or the battery lead is not
always powered.
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Possible solution
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Keep an electromagnetic-wave
generator such as a cellular phone
away from the unit and the wiring of
the unit. In case the noise cannot be
eliminated due to the wiring harness
of the car, consult your dealer.
Make sure that the ground lead is
connected to an unpainted part of the
chassis securely.
Change the wiring position of the
ground lead.
Mount a noise fi lter on the power supply.
Readjust balance/fader.
Check the speaker wiring.
Replace the speaker with new one.
Perform the speaker wiring in
accordance with the wiring diagram.
Check whether the antenna mounting
position and its wiring are correct.
In addition, check to see whether the
antenna ground is securely connected
to the chassis.
Check the wiring of the antenna battery
lead.
Move to an area where receivable
stations number is maximum, and try
presetting.
Make sure that the battery lead is
connected securely, and preset
stations again.
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