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.
?
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 tape inserted.
☞
Set the media you want to listen to. If there’s no media in this
unit, you can't switch to each source.
✔
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 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 battery wire has not been connected to the proper terminal.
☞
Connect the wire correctly, referring to the section on
<Connecting Wires to Terminals> (page 36).
✔
The ignition and battery wire are incorrectly connected.
11
☞
Connect the wire correctly, referring to the section on
<Connecting Wires to Terminals> (page 36).
?
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> (page 36).
✔
The cassette tape is bad.
23
☞
Try playing another cassette tape. If works fine, the first tape was
bad.
✔
The <Built-in Amp Mute Setting> (page 31) is ON.
☞
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 tape head is dirty.
26
☞
Clean the tape head.
✔
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 can’t be done.
✔
The <Switching Preout> (page 30) is set on Rear preout.
☞
Set it on Non-fading preout.
?
The Security Code item isn’t displayed in the Function Setting
System.
✔
The Security Code function is already activated.
☞
When the Security Code function is activated it isn’t displayed in
the Function Setting items.
?
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.
?
Even though the vehicle light switch is turned ON, the unit’s display
won’t dim.
36
✔
The dimmer wire isn’t connected.
☞
Connect the dimmer wire correctly.
Troubleshooting Guide
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DPX-MP7050̲U.S̲r1 2003.07.25 04:28 PM ページ38
