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.05
✔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 30).
✔The ignition and battery wire are incorrectly connected.11
☞Connect the wire correctly, referring to the section on
<Connecting Wires to Terminals> (page 30).
?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 30).
✔The cassette tape is bad.23
☞Try playing another cassette tape. If works fine, the first tape was
bad.
?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 setting can’t be done.28
✔The <Switching preout> (page 24) is set on Rear preout.
☞Set it on Non-fading preout.
?The text is not scrolled.31
✔This is because eight or less characters are displayed.
☞If all the characters are displayable on the display part, the text is
scrolled once when the display switches, and after that, the text
is not scrolled.
?The Security Code item isn’t displayed in the Function System.32
✔The Security Code function is already activated.
☞When the Security Code function is activated it isn’t displayed in
the Function 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.
?The display color changes subtly. 38-2
✔This is because the temperature is different than the temperature
when the setting was done.
☞The display color condition changes subtly according to the
ambient temperature.
Trou bleshooting Guide
DPX-MP4050(M-TKR)(E) 2003.02.14 09:03 AM Page 32