Sony DSX-A50BT Operating Instructions Manual page 33

No sound.
 The ATT function is activated.
 The position of the fader control "FADER" is
not set for a 2-speaker system.
No beep sound.
 The beep sound is canceled (page 26).
 An optional power amplifier is connected and
you are not using the built-in amplifier.
The contents of the memory have been
erased.
 The power supply lead or battery has been
disconnected or it is not connected properly.
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 27).
The display disappears from/does not
appear in the display window.
 The dimmer is set to "DIM-ON" (page 27).
 The display disappears if you press and hold
.
– Press  on the unit until the
display appears.
 The connectors are dirty (page 31).
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.
The display disappears while the unit is
operating.
 The Black Out function is set to on (page 27).
Remote commander operation is not
possible.
 If the Black Out function is activated (no
lighting), remote commander operation is not
possible (page 27).
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/white striped) 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).
– 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
PTY displays "- - - - - - - -."
 The current station is not an RDS station.
 RDS data has not been received.
 The station does not specify the program type.
33