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Sony cdx-f7500 Manual

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33
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.
• You tried to play back MP3 files with an
optional CD unit which is incompatible with
MP3.
t Play back with a Sony MP3 compatible
CD unit, such as the CDX-757MX.
The contents of the memory have been
erased.
• The RESET button has been pressed.
t Store again into the memory.
• The power lead or battery has been
disconnected.
• The power connecting lead is not connected
properly.
No beep sound.
• The beep sound is cancelled (page 25).
• An optional power amplifier is connected
and you are not using the built-in amplifier.
The display disappears from/does not
appear in the display window.
• The display disappears if you press and hold
(OFF).
t Press and hold (OFF) again until the
display appears.
• Remove the front panel and clean the
connectors. For details, see “Cleaning the
connectors” on page 30.
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 play back 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.
MP3 files cannot be played back.
• Recording was not performed according to
the ISO 9660 level 1 or level 2 format, or the
Joliet or Romeo in the expansion format.
• The file extension “.mp3” is not added to the
file name.
• Files are not stored in MP3 format.
MP3 files take longer to play back than
others.
The following discs take a longer time to start
playback.
– a disc recorded with complicated tree
structure.
– a disc recorded in Multi Session.
– a disc to which data can be added.
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
45°.
• The unit is not installed in a sturdy part of
the car.
The sound skips.
Dirty or defective disc.
continue to next page t
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