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CQ-C8401U/C8301U/C7401U/C7301UCQ-C8401U/C8301U/C7401U/C7301U
4140
Troubleshooting
Problem
Possible cause
a
Possible solution
English
Troubleshooting
Common (continued)
Some operations
are not executable.
Some operations are not executable in particular modes such as menu mode.
a Read the operating instructions carefully and cancel the mode. In case the
unit is still out of order, consult the dealer.
Problem
Possible cause
a
Possible solution
No sound from
speaker(s)
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.
a Check the speaker wiring.
The speaker
channels are
reversed between
right and left.
The speaker wiring is confused between right and left.
a Perform the speaker wiring in accordance with the wiring diagram.
The sound field is
not clear in the
stereo mode.
Central sound does
not settled.
The plus and minus terminals at right and left channels of speakers are connected
reversely.
a Perform the speaker wiring in accordance with the wiring diagram.
Radio
Poor reception or
noise
Antenna installation or wiring of antenna cable is faulty.
a 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.
No power is supplied to the antenna amplifier (when using a film antenna, etc.).
a Check the wiring of the antenna battery lead.
The power fails
unintentionally.
The safety device works.
a Call the store where you purchased the unit, or your nearest Panasonic
Servicenter.
The number of auto
preset stations is
less than 6.
The number of receivable stations is less than 6.
a Move to an area where receivable stations number is maximum, and try pre-
setting.
Preset stations
cannot be stored.
The contact of the battery lead is poor, or the battery lead is not always powered.
a Make sure that the battery lead is connected securely, and preset stations
again.
No playback or
disc ejected
The disc is inserted upside down.
a Insert a disc correctly.
There is a flaw or foreign material on the disc.
a Remove the foreign material, or use a flawless disc.
Sound skipping or
noise
There is a flaw or foreign material on the disc.
a Remove the foreign material, or use a flawless disc.
Sound skipping
due to vibration
The unit is not sufficiently secured.
a Secure the unit to the console box with the rear support strap, etc.
The unit is tilted at over 30˚ in the front-to-end direction.
a Make the angle 30˚ or less.
Disc unejectable
Something such as a peeled label obstructs the disc coming out.
a Hold down the [OPEN] button for 2 sec. or more when the face plate is open
(disc forced ejection). In case that the disc forced ejection does not work,
consult the dealer
The microcontroller in the unit operates abnormally due to noise or other factors.
a Unplug the power cord and plug it again. In case the unit is still out of order,
consult the dealer.
CD XM Tuner
Channel
unselectable
No contract with XM Satellite Radio Inc.
a Refer to page 13 of this book and the XM's website to sign up for XM Radio
service.
The CD-R/RWs that
are playable on
other devices are
not playable on
this unit.
The playability of some CD-R/RWs may depend on the combination of media,
recording software and recorder to be used even if these CD-R/RWs are playable on
other devices such as a PC.
a Make CD-R/RWs in different combination of media, recording software and
recorder after referring to the description about MP3/WMA.
Sound skipping or
noise
There is a flaw or foreign material on the disc.
a Remove the foreign material, or use a flawless disc. For MP3/WMA, refer to
the description about MP3/WMA.
Playing VBR (Variable Bit Rate) files may cause sound skipping.
a Play Non-VBR files.
MP3/WMA
No playback or
disc ejected
The disc has unplayable formatted data.
a Refer to the description about MP3/WMA for playable sound data except CD-
DA (i.e. music CD).