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Sony cdx m 730 Manual

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Troubleshooting
The following checklist will help you remedy
problems you may encounter with your unit.
Before going through the checklist below, check
the connection and operating procedures.
General
No sound.
•Press (VOL) (+) to adjust the volume.
• Cancel the ATT function.
• Set the fader control to the centre position for
a 2-speaker system.
The contents of the memory have been
erased.
• The RESET button has been pressed.
t Store again into the memory.
• The power cord or battery has been
disconnected.
• The power connecting cord is not connected
properly.
No beep sound.
The beep sound is cancelled (page 22).
Indications disappear from/do not appear in
the display.
• The clock display disappears if you press
(OFF) for 2 seconds.
t Press (OFF) again for 2 seconds to
display the clock.
• Remove the front panel and clean the
connectors. See “Cleaning the connectors”
on page 26.
Stored stations and correct time are erased.
The fuse has blown.
Makes noise when the ignition key is in the
ON, ACC, or OFF position.
The leads are not matched correctly with the
car’s accessory power connector.
No power is being supplied to the unit.
• Check the connection. If everything is in
order, check the fuse.
• The car does not have an ACC position.
t Press (SOURCE) (or insert a disc) to turn
on the unit.
The power is continuously supplied to the
unit.
The car does not have an ACC position.
The power aerial does not extend.
The power aerial does not have a relay box.
CD/MD playback
A disc cannot be loaded.
• Another CD is already loaded.
• The CD is forcibly inserted upside down or
in the wrong way.
Playback does not begin.
• Defective MD or dirty CD.
• CD-R/CD-RW that is not finalized.
• You tried to playback a CD-R/CD-RW not
designed for audio use.
• Some CD-Rs/CD-RWs may not play due to
its recording equipment or the disc
condition.
A disc is automatically ejected.
The ambient temperature exceeds 50°C.
The operation buttons do not function.
CD will not be ejected.
Press the RESET button.
The sound skips from vibration.
• The unit is installed at an angle of more than
60°.
• The unit is not installed in a sturdy part of
the car.
The sound skips.
Dirty or defective disc.
Cannot turn off the “--------” indication.
You may be in the name edit mode.
t Press (LIST) for 2 seconds.
Radio reception
Preset tuning is not possible.
• Store the correct frequency in the memory.
• The broadcast signal is too weak.
The stations cannot be received.
The sound is hampered by noises.
• Connect a power aerial control lead (blue) or
accessory power supply lead (red) to the
power supply lead of a car’s aerial booster.
(Only if your car has built-in FM/MW/LW
aerial in the rear/side glass.)
• Check the connection of the car aerial.
• The auto aerial will not go up.
t Check the connection of the power aerial
control lead.
• Check the frequency.
• When the DSO mode is on, the sound is
sometimes hampered by noises.
t Set the DSO mode to off (page 24).
Automatic tuning is not possible.
• The local seek mode is set to “on.”
t Set the local seek mode to “off” (page
23).
• The broadcast signal is too weak.
t Perform manual tuning.
The “ST” indication flashes.
• Tune in the frequency accurately.
• The broadcast signal is too weak.
t Set to the monaural reception mode (page
23).
continue to next page t
… 29 …


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