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Troubleshooting Guide
Some functions of this unit may be disabled by
some settings made on this unit.
!
• Cannot set up the subwoofer.
• Cannot set up the High Pass Filter.
• Cannot set up the Fader.
• No Audio control effect on AUX.
• Preout is not set to subwoofer. ☞ "SWPRE" of
<Menu System> (page 10)
• "Subwoofer output" of <Basic Operation> (page 4)
is not set to On.
• The Dual zone function is enabled. ☞ <Audio
Setup> (page 6)
!
Cannot set up the subwoofer phase.
The Low Pass Filter is set to Through. ☞ <Audio
Setup> (page 6)
!
• Cannot select the output destination of the
subsource in the Dual zone.
• Cannot adjust the volume of the rear speakers.
The Dual zone function is disabled. ☞ <Audio
Setup> (page 6)
!
• Cannot register a security code.
• Cannot set up Display Illumination Control.
<Demonstration mode Setting> (page 11) is not
turned off.
What might seem to be a malfunction in your unit
may just be the result of slight misoperation or
miswiring. Before calling service, first check the
following table for possible problems.
Tuner source
?
Radio reception is poor.
✔ The car antenna is not extended.
☞ Pull the antenna out all the way.
Disc source
?
The specified disc does not play, but another one
plays instead.
✔ The specified CD is quite dirty.
☞ Clean the CD.
✔ The disc is loaded in a different slot from that
specified.
☞ Eject the disc magazine and check the number
for the specified disc.
✔ The disc is severely scratched.
☞ Try another disc instead.
18
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KDC-MP5539U/KDC-MP5039U/KDC-MP4039
Audio file source
?
The sound skips when an Audio file is being
played.
✔ The media is scratched or dirty.
☞ Clean the media, referring to the CD cleaning of
the section on <Handling CDs> (page 3).
✔ The recording condition is bad.
☞ Record the media again or use another media.
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