24
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.
• Rotate the volume control dial to adjust the
volume.
• Cancel the ATT function.
• Set the fader control to the center 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 canceled (page 15).
• 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 21.
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 cassette) to
turn on the unit.
The power is continuously supplied to the
unit.
The car does not have an ACC position.
The power antenna does not extend.
The power antenna does not have a relay box.
Tape playback
The sound is distorted.
The tape head is contaminated.
t
Clean the head with a commercially
available dry-tape cleaning cassette.
The AMS does not operate correctly.
• There is noise in the space between tracks.
• A blank space is too short (less than 4
seconds).
• A long pause, or a passage of low
frequencies or very low sound level is treated
as a blank space.
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 antenna control lead (blue)
or accessory power supply lead (red) to the
power supply lead of a car’s antenna booster
(only when your car has built-in FM/AM
antenna in the rear/side glass).
• Check the connection of the car antenna.
• The auto antenna will not go up.
t
Check the connection of the power
antenna 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 17).
Automatic tuning is not possible.
• The local seek mode is set to “ON.”
t
Set the local seek mode to “OFF”
(page 10).
• 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 the monaural reception mode to
“ON” (page 11).
A program broadcast in stereo is heard in
monaural.
The unit is in monaural reception mode.
t
Cancel monaural reception mode
(page 11).
