Troubleshooting - Sony MEX-BT4050U Operating Instructions Manual

Your dealer may not handle some of the above
listed accessories. Please ask the dealer for
detailed information.
Design and specifications are subject to
change without notice.

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.
For details on using the fuse and removing the
unit from the dashboard, refer to the
installation/connections manual supplied with
this unit.
If the problem is not solved, visit the support
site on the back cover.
General
No power is being supplied to the unit.
 Check the connection or fuse.
 If the unit is turned off and the display
disappears, the unit cannot be operated with
the remote commander.
– Turn on the unit.
The power antenna (aerial) does not extend.
 The power antenna (aerial) does not have a
relay box.
No sound.
 The ATT function is activated, or the
Telephone ATT function (when the interface
cable of a car telephone is connected to the
ATT lead) is activated.
 The position of the fader control "FADER" is
not set for a 2-speaker system.
No beep sound.
 The beep sound is cancelled (page 31).
 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 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 31).
The display disappears from/does not
appear in the display window.
 The dimmer is set to "DIM-ON" (page 31).
 The display disappears if you press and hold
.
– Press  on the unit until the
display appears.
 The connectors are dirty (page 35).
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 31).
Radio reception
Stations cannot be received.
The sound is hampered by noises.
 The connection is not correct.
– Connect an REM OUT 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 a
built-in radio antenna (aerial) in the rear/
side glass).
– Check the connection of the car antenna
(aerial).
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