— 35 —
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.
?
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.
?
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> (page 27) 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 9)
✔
The <Built-in Amp Mute Setting> (page 27) 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 <Non-fading output> (page 15) is OFF.
29
☞
Turn it ON.
✔
The <Dual zone system> (page 15) 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.
Troubleshooting Guide
KDC-Z838/Z737_U.S_r2 02.11.15 10:07 AM Page 35
