Troubleshooting; If You Suspect Something Wrong; Common - Panasonic PP104078 Operating Instructions Manual

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
dealership. The product should be serviced only by
qualified personnel. Please refer the checking and the
repair to professionals. We 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 for 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 generated.
Noise
Noise is made in step with
engine revolutions.
Some operations are not
executable.
No sound from speaker(s)
The speaker channels are
reversed between right and left.
The sound field is not clear in
the stereo mode. Central
sound does not settled.
26
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
dealership.
¡Never try to repair the unit by yourself because it
is dangerous to do so.
Possible cause
The power cord (battery, power and ground) is connected in the
wrong way.
aCheck the wiring.
The sound volume level is zero (MUTE).
a
Turn [VOL] (Volume) clockwise to increase the sound volume.
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.
There is an electromagnetic-wave generator such as a mobile phone
near the unit or its electrical lines.
a
Keep an electromagnetic-wave generator such as a mobile
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 truck, consult your dealership.
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 truck.
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.
a
Read the operating instructions carefully and cancel the mode.
If the unit is still out of order, consult your dealership.
BALANCE/FADER setting is not appropriate.
a
Readjust BALANCE/FADER.
There is a break, a short circuit, poor contact or wrong wiring
regarding the speaker wiring.
aCheck the speaker wiring.
The speaker wiring is confused between right and left.
aPerform the speaker wiring in accordance with the wiring diagram.
The plus and minus terminals at right and left channels of speakers
are connected reversely.
aPerform the speaker wiring in accordance with the wiring diagram.
a
Possible solution