Troubleshooting - Sony CDX-M9900 Servise Manual

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
The operation buttons do not function.
Press the reset button.
No sound.
• Rotate the L dial 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 lead is not connected
properly.
No beep sound.
The beep sound is cancelled (page 43).
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.
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) to turn on the unit.
The power is continuously supplied to the
unit.
The car does not have an ACC position.
t After turning off the ignition, be sure to
press and hold (OFF) on the unit until the
display disappears.
The power aerial does not extend.
The power aerial does not have a relay box.
50
CD/MD playback
Playback does not begin.
• Defective MD or dirty CD.
• 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.
Album name/track name/ID3 tag is not
displayed correctly.
• A disc is not compliant with ISO 9660 level
1.
t Use a compliant disc.
• The unit can only display the letter codes,
such as ASCII, half sized European letters
(ASCII only for Joliet), and Shift-JIS. Letter
codes other than the above will not display
correctly.
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.
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.
• Defective or dirty disc.
• The CD-R/CD-RW has been damaged.
"Name Edit" does not appear in the menu.
The number of disc names stored in this unit
has reached 50.