Sony MEX-BT2500: Troubleshooting

Card remote commander operation is not

MPEG Layer-3 audio coding technology and

possible.

patents licensed from Fraunhofer IIS and Thomson.

Make sure the insulation film has been removed

(page 5).

Design and specifications are subject to change

without notice.

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.

• Halogenated flame retardants are not used in the

certain printed wiring boards.

The disc does not playback.

• Halogenated flame retardants are not used in

• Defective or dirty disc.

cabinets.

• The CD-Rs/CD-RWs are not for audio use (page 18).

• Paper is used for the packaging cushions.

MP3/WMA files cannot be played back.

The disc is incompatible with the MP3/WMA format

and version (page 18).

Troubleshooting

MP3/WMA files take longer to play back than

others.

The following checklist will help you remedy

The following discs take a longer time to start

problems you may encounter with your unit.

playback.

Before going through the checklist below, check the

– a disc recorded with a complicated tree structure.

connection and operating procedures.

– a disc recorded in Multi Session.

– a disc to which data can be added.

General

The display items do not scroll.

• For discs with very many characters, those may not

No power is being supplied to the unit.

scroll.

Check the connection. If everything is in order, check

• “A.SCRL” is set to “OFF”.

the fuse.

t Set “A.SCRL-ON” (page 16).

The power antenna (aerial) does not extend.

The sound skips.

The power antenna (aerial) does not have a relay box.

• Installation is not correct.

No sound.

t Install the unit at an angle of less than 45° in a

• The volume is too low.

sturdy part of the car.

• The ATT function is activated (page 9).

• Defective or dirty disc.

• The position of the fader control “FAD” is not set for

The disc will not eject.

a 2-speaker system.

Press Z (eject) (page 9).

No beep sound.

The beep sound is canceled (page 16).

Radio reception

The contents of the memory have been erased.

• The RESET button has been pressed.

The stations cannot be received.

tStore again into the memory.

The sound is hampered by noises.

• The power supply lead or battery has been

• Connect a power antenna (aerial) control lead (blue)

disconnected.

or accessory power supply lead (red) to the power

• The power supply lead is not connected properly.

supply lead of a car’s antenna (aerial) booster (only

Stored stations and correct time are erased.

when your car has built-in FM/MW/LW antenna

The fuse has blown.

(aerial) in the rear/side glass).

Makes noise when the position of the ignition

• Check the connection of the car antenna (aerial).

is switched.

• The auto antenna (aerial) will not go up.

The leads are not matched correctly with the car’s

t Check the connection of the power antenna

accessory power connector.

(aerial) control lead.

• Check the frequency.

The display disappears from/does not appear

in the display window.

Preset tuning is not possible.

• The dimmer is set “DIM-ON” (page 16).

• Store the correct frequency in the memory.

• The display disappears if you press and hold (OFF).

• The broadcast signal is too weak.

tPress and hold (OFF) on the unit until the

Automatic tuning is not possible.

display appears.

• Setting of the local seek mode is not correct.

• The connectors are dirty (page 20).

t Tuning stops too frequently:

The Auto Off function does not operate.

Set “LOCAL-ON” (page 16).

The unit is turned on. The Auto Off function activates

t Tuning does not stop at a station:

after turning off the unit.

Set “MONO-ON” (page 17).

t Turn off the unit.

• The broadcast signal is too weak.

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t Perform manual tuning.

During FM reception, the “ST” indication

The phone sound quality is poor.

flashes.

Phone sound quality depends on reception conditions

• Tune in the frequency accurately.

of cellular phone.

• The broadcast signal is too weak.

t Move your car to a place where you can enhance

t Set “MONO-ON” (page 17).

the cellular phone's signal if the reception is poor.

An FM program broadcast in stereo is heard in

The volume of the connected audio device is

monaural.

low (high).

The unit is in monaural reception mode.

Volume level will differ depending on the audio

tSet “MONO-OFF” (page 17).

device.

t Adjust the volume of the connected audio device or

this unit.

RDS

The sound skips during playback of a

The SEEK starts after a few seconds of

Bluetooth audio device.

listening.

• Reduce the distance between the unit and the

The station is non-TP or has weak signal.

Bluetooth audio device.

tDeactivate TA (page 11).

• If the Bluetooth audio device is stored in a case

No traffic announcements.

which interrupts the signal, remove the audio device

• Activate TA (page 11).

from the case while using.

• The station does not broadcast any traffic

• Several Bluetooth devices or other devices which

announcements despite being TP.

emit radio waves are used nearby.

t Tune in another station.

t Turn off the other devices.

t Reduce the distance from the other devices.

PTY displays “- - - - - - - -.”

• The playback sound stops momentarily when the

• The current station is not an RDS station.

connection between this unit and the cellular phone is

• RDS data has not been received.

being made. This is not a malfunction.

• The station does not specify the program type.

The connected Bluetooth audio device cannot

be controlled.

Bluetooth function

Check that the connected Bluetooth audio device

The connecting device cannot detect this unit.

supports AVRCP.

• Before the pairing is made, set this unit to pairing

Some functions do not work.

standby mode.

Check if the connecting device supports the functions

• While connected to a Bluetooth device, this unit

in question.

cannot be detected from another device. Disconnect

A call is answered unintentionally.

the current connection and search for this unit from

The connecting phone is set to answer a call

another device.

automatically.

• When the device pairing is made, set the Bluetooth

signal output to on (page 14).

No sound is output from the car speakers

during handsfree call.

Connection is not possible.

If the sound is output from the cellular phone, set the

• Connect to this unit from a Bluetooth device or vice

cellular phone to output the sound from the car

versa, The connection is controlled from one side

speakers.

(this unit or Bluetooth device), but not both.

• Check the pairing and connection procedures in the

“OFF BT” appears when initializing.

manual of the other device, etc., and perform the

Press (OFF). Press and hold (EQ/BLUETOOTH) until

operation again.

“ ” turns off. Then initialize again.

The talker’s voice volume is low.

Adjust the volume level.

Echo or noise occurs in phone call

Error displays/Messages

conversations.

• Lower the volume.

• If the ambient noise other than the phone call sound

ERROR

is loud, try reducing this noise.

• The disc is dirty or inserted upside down.

E.g.: If a window is open and road noise, etc., is loud,

t Clean or insert the disc correctly.

shut the window. If the air conditioner is loud, lower

• A blank disc has been inserted.

the air conditioner.

• The disc cannot play due to a problem.

t Insert another disc.

The phone is not connected.

When the Bluetooth audio is played back, the phone is

FAILURE

not connected even if you press (handsfree).

The connection of speakers is incorrect.

tConnect from the phone.

t See the installation guide manual of this model to

check the connection.

continue to next page t

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L. SEEK +/–

The local seek mode is on during automatic tuning.

NO AF

There is no alternative frequency for the current

station.

t Press (SEEK) –/+ while the program service name

is flashing. The unit starts searching for another

frequency with the same PI (Program

Identification) data (“PI SEEK” appears).

NO INFO

Text information is not written in the MP3/WMA file.

NO MUSIC

The disc is not a music file.

t Insert a music CD.

NO NAME

An album/track name is not written in the track.

NO TP

The unit will continue searching for available TP

stations.

OFFSET

There may be an internal malfunction.

t Check the connection. If the error indication

remains on in the display, consult your nearest

Sony dealer.

READ

The unit is reading all track and album information on

the disc.

t Wait until reading is complete and playback starts

automatically. Depending on the disc structure, it

may take more than a minute.

PUSH EJT

The CD unit cannot be operated due to a problem.

t Press Z (eject) (page 9).

“” or “”

During reverse or fast-forward, you have reached the

beginning or the end of the disc and you cannot go any

further.

“”

The character cannot be displayed with the unit.

Support site

If you have any questions or for the latest

support information on this product, please

visit the web site below:

http://support.sony-europe.com

If these solutions do not help improve the situation,

consult your nearest Sony dealer.

If you take the unit to be repaired because of CD

playback trouble, bring the disc that was used at the

time the problem began.

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