TROUBLESHOOTING

Maybe, it will happen that your headunit will not function as you expected it to be. Before calling for service, please read this user manual and review carefully the setting values. You may find that a function cannot work properly with the values you defined. Nevertheless, if you need to send your headunit for reparation, always send it complete with detachable front (do not try to open the headunit to service it by yourself).

In the case whereby your headunit freezes, please flip down the front and use a pen or pen- cil to poke the "RESET" hole.

NO POWER Verification

The headunit does not function.

Make sure that the headunit is well inserted in the dashboard (see MOUNTING).

Make sure that the headunit is well connect- ed (see INSTALLATION).

Switch on the headunit again.

The headunit does not function and the dis- play screen does not light up.

Check the fuse (see INSTALLATION).

NO SOUND Verification

The display screen lights up but the headunit gives no sound (or only a whistle).

Increase the volume; and if you are listening to the radio station, move to an area where the reception of the station is better.

Check the antenna and its connection (see

INSTALLATION).

Check if the radio station search is finished.

Verify the speakers' connections (see IN-

STALLATION) and the speakers balance

(SOUND SETTINGS).

There is no sound from the loudspeak- ers (front and rear) from any of the sources.

There is no sound from the sub woofer after having connected an external am- plifier.

Verify your external amplifier installation.

Check the connection of the external amplifier to the PREAMP OUT (see

INSTALLATION).

SOUND TROUBLE Verification

The sound level is too low during traffic an- nouncements.

Adjust the volume setting for traffic an- nouncements (see "Presetting TA Volume").

CD ERRORS Verification

During playback, the headunit does not func- tion and displays “CD ERROR”.

Make sure that the CD is properly inserted into the headunit.

Check whether the headunit contains a CD.

Make sure that the CD is correctly inserted; not dirty, exotic or damaged; and the front of the headunit is properly shut.

USB & SD / MMC ERRORS Verification

The headunit cannot connect to the MP3 player / USB / SD / MMC device.

The inserted device must use the Microsoft

Windows FAT System.

The headunit does not support portable USB hard disk (note that the sourcing current of the portable hard disk is beyond the headun- it's capability)

Check the encoding formats of the songs on your device (see "Notes on MP3" and "Notes on WMA").

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VDO Dayton CD 2327 G, CD 2537 U, CD 2217 G, CD 2737 B user manual Troubleshooting