English
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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.
✔
No ACC position on vehicle ignition.
02
☞
Connect the same wire to the ignition as the battery wire.
?
If you have selected Standby mode, the power will go OFF
automatically.
03
✔
The Power OFF Timer function has been activated.
☞
If you do not want the power to go OFF automatically, cancel the
Power OFF Timer function.
?
Nothing happens when the buttons are pressed.
04
✔
The computer chip in the unit is not functioning normally.
☞
Press the reset button on the unit (page 4).
?
There’s a source you can’t switch.
06
✔
There’s no CD 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 faceplate does not open or close.
09
✔
The faceplate is incorrectly attached.
☞
Reattach the faceplate correctly, See the section on <Removing
the Faceplate>(page 16).
?
The memory is erased when the ignition is turned OFF.
10
✔
The battery wire has not been connected to the proper terminal.
☞
Connect the wire correctly, referring to the section on
<Connecting Wires to Terminals>.
✔
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 TEL mute function does not work.
15
✔
The TEL mute wire is not connected properly.
☞
Connect the wire correctly, referring to the section on
<Connecting Wires to Terminals>.
?
The TEL mute function turns ON even though the TEL mute wire is
not connected.
16
✔
The TEL mute wire is touching a metal part of the car.
☞
Pull the TEL mute wire away from the metal part of the car.
?
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> (page 10) 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
☞
Increase the values of Volume offset. (page 10)
✔
The <Built-in Amp Mute Setting> (page 33) 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.
Troubleshooting Guide
KDC-M907
_U.S 04.2.4 4:17 PM Page 44
