Sony DSX-A55BT Operating Instructions Manual page 26

The phone is not connected.
 When BLUETOOTH audio is played, the phone
is not connected even if you press
(handsfree).
 Connect from the phone.
The phone sound quality is poor.
 Phone sound quality depends on reception
conditions of cellular phone.
 Move your car to a place where you can
enhance the cellular phone's signal if the
reception is poor.
The volume of the connected audio device is
low (high).
 Volume level will differ depending on the
audio device.
 Adjust the volume of the connected audio
device or this unit.
The sound skips during playback of a
BLUETOOTH audio device.
 Reduce the distance between the unit and
the BLUETOOTH audio device.
 If the BLUETOOTH audio device is stored in a
case which interrupts the signal, remove the
audio device from the case during use.
 Several BLUETOOTH devices or other devices
which emit radio waves are in use nearby.
 Turn off the other devices.
 Increase the distance from the other
devices.
 The playback sound stops momentarily when
the connection between this unit and the
cellular phone is being made. This is not a
malfunction.
The connected BLUETOOTH audio device
cannot be controlled.
 Check that the connected BLUETOOTH audio
device supports AVRCP.
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Some functions do not work.
 Check if the connecting device supports the
functions in question.
A call is answered unintentionally.
 The connecting phone is set to answer a call
automatically.
Pairing failed due to time out.
 Depending on the connecting device, the
time limit for pairing may be short.
 Try completing the pairing within the time.
BLUETOOTH function cannot operate.
 Turn off the unit by pressing OFF for more
than 2 seconds, then turn the unit on again.
No sound is output from the car speakers
during handsfree call.
 If the sound is output from the cellular phone,
set the cellular phone to output the sound
from the car speakers.
Error displays/Messages
CHECKING
 The unit is confirming the connection of a
USB device.
 Wait until confirming the connection is
finished.
ERROR
 There may be an internal malfunction.
 Press OFF for more than 2 seconds (the
display disappears), then press OFF again.
ERROR-99
 There may be an internal malfunction.
 Press OFF for more than 2 seconds (the
display disappears), then press OFF again.
If the error indication remains on in the
display, consult your nearest Sony dealer.