Sony DSX-A50BT Operating Instructions Manual page 34

Stored stations and correct time are erased.
The fuse has blown.
Makes noise when the position of the
ignition is switched.
 The leads are not matched correctly with the
car's accessory power connector.
During playback or reception,
demonstration mode starts.
 If no operation is performed for 5 minutes
with "DEMO-ON" set, demonstration mode
starts.
– Set "DEMO-OFF" (page 28).
The display disappears from/does not
appear in the display window.
 The dimmer is set to "DIM-ON" (page 28).
 The display disappears if you press and hold
.
– Press  on the unit until the
display appears.
 The connectors are dirty (page 32).
The Auto Off function does not operate.
 The unit is turned on. The Auto Off function
activates after turning off the unit.
– Turn off the unit.
Radio reception
The stations cannot be received.
The sound is hampered by noises.
 The connection is not correct.
– 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 radio antenna (aerial) in the
rear/side glass).
– Check the connection of the car antenna
(aerial).
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– 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.
 The broadcast signal is too weak.
– Perform manual tuning.
RDS
The SEEK starts after a few seconds of
listening.
 The station is non-TP or has weak signal.
– Deactivate TA (page 13).
No traffic announcements.
 Activate TA (page 13).
 The station does not broadcast any traffic
announcements despite being TP.
– Tune in another station.
PTY displays "- - - - - - - -."
 The current station is not an RDS station.
 RDS data has not been received.
 The station does not specify the program type.
Program service name flashes.
 There is no alternative frequency for the
current station.
– Press  +/– while the program service
name is flashing. "PI SEEK" appears and the
unit starts searching for another frequency
with the same PI (Program Identification)
data.