Sony CDX-RA750 Operating Instructions Manual page 16

The display disappears from/does not appear
in the display window.
• The dimmer is set "Dimmer on" (page 10).
• The display disappears if you press and hold (OFF).
t Press and hold (OFF) on the unit until the
display appears.
• The connectors are dirty (page 14).
Shutter does not close.
Press and hold Z for more than 2 seconds. If the
problem persists, consult your nearest Sony dealer.
DSO does not function.
Depending on the type of car interior or type of music,
DSO may not have a desirable effect.
The images change automatically.
In Auto Image mode, the selected image cannot be
displayed.
t To display selected image only, set to "Auto Image
off" (page 10).
Any display items do not display.
t Set to "Info All" (page 10).
CD/MD playback
The disc cannot be loaded.
• Another disc is already loaded.
• The disc has been forcibly inserted upside down or in
the wrong way.
The disc does not playback.
• Defective or dirty disc.
• The CD-Rs/CD-RWs are not for audio use (page 12).
MP3/WMA files cannot be played back.
The disc is incompatible with the MP3/WMA format
and version (page 12).
MP3/WMA files take longer to play back than
others.
The following discs take a longer time to start
playback.
– a disc recorded with a complicated tree structure.
– a disc recorded in Multi Session.
– a disc to which data can be added.
The ATRAC CD cannot play.
• The disc is not created by authorized software, such
as SonicStage or SonicStage Simple Burner.
• Tracks that are not included in the group cannot be
played.
The display items do not scroll.
• For discs with very many characters, those may not
scroll.
• "Auto Scroll" is set to "off."
t Set "Auto Scroll on" (page 10) or press (SCRL).
The sound skips.
• Installation is not correct.
t Install the unit at an angle of less than 45° in a
sturdy part of the car.
• Defective or dirty disc.
The operation buttons do not function.
The disc will not eject.
Press the RESET button (page 4).
Card remote commander does not work.
Close the shutter.
16
"MS" or "MD" does not appear on the source
display when both the optional MGS-X1 and
MD changer are connected.
This unit recognizes MGS-X1 as an MD unit.
t Press (SOURCE) until "MS" or "MD" appears,
then press (MODE) repeatedly.
Radio reception
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 when your
car has built-in FM/AM 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 7).
Preset tuning is not possible.
• Store the correct frequency in the memory.
• The broadcast signal is too weak.
Automatic tuning is not possible.
• Setting of the local seek mode is not correct.
t Tuning stops too frequently:
Press (SENS) until "Local on" appears.
t Tuning does not stop at a station:
Press (SENS) repeatedly until "Mono on" or
"Mono off" (FM), or "Local off" (AM) appears.
• The broadcast signal is too weak.
t Perform manual tuning.
During FM reception, the "ST" indication
flashes.
• Tune in the frequency accurately.
• The broadcast signal is too weak.
t Press (SENS) to set the monaural reception
mode to "Mono on."
An FM programme broadcast in stereo is heard
in monaural.
The unit is in monaural reception mode.
t Press (SENS) until "Mono off" appears.