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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 power does not turn ON.01
✔ The fuse has blown.
☞ After checking for short circuits in the wires, replace the fuse with
one with the same rating.
? There’s a source you can’t switch.07
✔ There’s no media inserted.
☞ Set the media you want to listen to. If there’s no media in this
unit, you can't switch to each source.
✔ The Disc changer isn’t connected.08
☞ Connect the Disc changer. If the Disc changer isn’t connected to
it's input terminal, You can't switch to an external disc source.
? The memory is erased when the ignition is turned OFF.10
✔ The ignition and battery wire are incorrectly connected.11
☞ Connect the wire correctly, referring to the section on
<Connecting Wires to Terminals>.
? There’s no loudness effect.12
✔ You’re using Non-fading preout.
☞ Loudness has no effect in Non-fading preout.
? The Non-fading output can’t be turned ON or OFF.14
✔ The <Switching preout> (page 34) is set is set on Rear preout.
☞ Change it to Non-fading preout.
? Even if Loudness is turned ON, high-pitched tone isn't compensated
for. 17
✔ Tuner source is selected.
☞ High-pitched tone isn't compensated for when in Tuner source.
? The Bass center frequency, Bass quality factor, Bass extend, Middle
center frequency, Middle quality factor, and Treble center frequency
can’t be adjusted.19
✔ The <System Q Setting> (page 34) is set OFF.
☞ Set it ON.
? No sound can be heard, or the volume is low.
✔ The fader or balance settings are set all the way to one side.21
☞ Center the fader and balance settings.
✔ The input/output wires or wiring harness are connected incorrectly.22
☞ Reconnect the input/output wires or the wiring harness correctly.
See the section on <Connecting Wires to Terminals>.
✔ The values of Volume offset are low.24
☞ Turn up the Volume offset, referring to the section on <Audio
control> (page12).
✔ The <Built-in Amp Mute Setting> (page 34) is ON.100
☞ Turn it OFF.
? The sound quality is poor or distorted.25
✔ One of the speaker wires is being pinched by a screw in the car.
☞ Check the speaker wiring.
✔ The speakers are not wired correctly.27
☞ Reconnect the speaker wires so that each output terminal is
connected to a different speaker.
? Non-fading output, Non-fading Low Pass Filter and Non-fading
setting can’t be done.28
✔ The <Switching preout> (page 34) is set on Rear preout.
☞ Set it on Non-fading preout.
✔ The <Non-fading output> (page 17) is OFF.29
☞ Turn it ON.
✔ The <Dual zone system> (page 20) is ON.30
☞ Turn it OFF.
? There’s no Front High Pass Filter and Rear High Pass Filter effect.31
✔ The Non-fading preout is being used.
☞ There’s no effect in Non-fading preout.
? The Touch Sensor Tone doesn’t sound.34
✔ The preout jack is being used.
☞ The Touch Sensor Tone can’t be output from the preout jack.
? The Dimmer function doesn’t work. 38-1
✔ The Dimmer wire isn’t connected correctly.
☞ Check the Dimmer wire connection.
Troubleshooting Guide
KDC-MP822_U.S 02.12.11 11:23 AM Page 44