Sony MEX-BT2850 Operating Instructions Manual page 30

The display disappears from/does not appear
in the display window.
• The dimmer is set to "DIM-ON" (page 24).
• The display disappears if you press and hold
(SOURCE/OFF).
t Press (SOURCE/OFF) on the unit until the
display appears.
• The connectors are dirty (page 27).
The Auto Off function does not operate.
The unit is turned on. The Auto Off function activates
after turning off the unit.
t Turn off the unit.
The display disappears while the unit is
operating.
The Black Out function is set to on (page 24).
Card remote commander operation is not
possible.
If the Black Out function is activated (no lighting),
card remote commander operation is not possible
(page 24).
Radio reception
The stations cannot be received.
The sound is hampered by noises.
• The connection is not correct.
t Connect a power antenna (aerial) control lead
(blue) or accessory power supply lead (red) to the
power supply lead of a car's antenna (aerial)
booster (only when your car has built-in FM/
MW/SW antenna (aerial) in the rear/side glass).
t Check the connection of the car antenna (aerial).
t If the auto antenna (aerial) will not go up, check
the connection of the power antenna (aerial)
control lead.
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:
Set "LOCAL-ON" (page 24).
t Tuning does not stop at a station:
Set "LOCAL-OFF" (page 24).
• 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 Set "MONO-ON" (page 24).
An FM program broadcast in stereo is heard in
monaural.
The unit is in monaural reception mode.
t Set "MONO-OFF" (page 24).
30
RDS
PTY displays "- - - - - - - -."
• The current station is not an RDS station.
• RDS data has not been received.
• The station does not specify the program type.
CD 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 play back.
• Defective or dirty disc.
• The CD-Rs/CD-RWs are not for audio use (page 25).
MP3/WMA files cannot be played back.
The disc is incompatible with the MP3/WMA format
and version (page 26).
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 display items do not scroll.
• For discs with very many characters, those may not
scroll.
• "A.SCRL" is set to "OFF."
t Set "A.SCRL-ON" (page 24).
t Press and hold (DSPL/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 7).
Bluetooth function
The connecting device cannot detect this unit.
• Before the pairing is made, set this unit to pairing
standby mode.
• While connected to a Bluetooth device, this unit
cannot be detected from another device. Disconnect
the current connection and search for this unit from
another device.
• When the device pairing is made, set the Bluetooth
signal output to on (page 21).
Connection is not possible.
• Connect to this unit from a Bluetooth device or vice
versa. The connection is controlled from one side
(this unit or Bluetooth device), but not both.
• Check the pairing and connection procedures in the
manual of the other device, etc., and perform the
operation again.
The talker's voice volume is low.
Adjust the volume level.