74
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DPX504U/ DPX404U/ DPX304
Troubleshooting Guide
Some functions of this unit may be disabled by
some settings made on this unit.
! • Cannot set up the subwoofer.
• No output from the subwoofer.
• Cannot set up the subwoofer position of Manual
position setting.
▲
• The Dual zone function is enabled. <Dual Zone
System> (page 51)
• “SubWoofer” of <Audio Control> (page 48)/
“SUBWOOFER SET”
of <Audio Control> (page 52)
is not set to ON.
• “SubWoofer”
> “FC” of <X’Over Setting> (page 56)/
“LPF SUBWOOFER”
of <Audio Control> (page 52)
is set to “Through”/ “THROUGH”.
• In the speaker select option, None is selected for
the subwoofer. <Speaker Setting> (page 54)
! • Cannot set up the equalizer.
• Cannot set up the Bass Boost.
• Cannot set up the Highway sound.
• Cannot set up the Supreme.
• Cannot set up the Position control.
▲
• The Dual zone function is enabled. <Dual Zone
System> (page 51)
• The DSP function is disabled. “DSP Set” of <Audio
Control> (page 48)
• In the speaker select option, None is selected for
the rear speakers. <Speaker Setting> (page 54)
! • 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. <Dual Zone
System> (page 51)
! Cannot set up Display.
▲
<Demonstration mode Setting> (page 45) is not
turned off.
! Cannot switch to USB/iPod source.
▲
The Dual zone function is set to USB/iPod. <Dual
Zone System> (page 51)
! The number of songs contained in “SONGS”
category of this unit is different from that
contained in “SONGS” category of iPod.
▲
Podcast files are not counted in this unit as this unit
does not support the playback of podcast files.
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.
General
? The operation check sound (beep sound) does not
sound.
✔ The preout jack is being used.
The Touch Sensor Tone cannot be output from
the preout jack.
? The illumination flashes when the knob or button
is operated.
✔ This is the key illumination effect.
You set this effect in “ILLUMI Effect” of <Display
Setting> (page 36).
? The key illumination effect brought about in
conjunction with the sound volume is small.
✔ The key illumination effect may be insufficient
depending on the sound volume and sound quality.
Tuner source
? Radio reception is poor.
✔ The car antenna is not extended.
Connect the Antenna control wire to the power
terminal for the booster amplifier of the film-type
or short pole type antenna
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, referring to the CD cleaning of the
section on <Handling discs> (page 4).
✔ 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.
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 discs> (page 4).
✔ The recording condition is bad.
Record the media again or use another media.
