JVC KD-R901: Troubleshooting

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Troubleshooting

What appears to be trouble is not always serious. Check the following points before calling a service center.

Symptoms

Remedies/Causes

General

•  Sound cannot be heard from the speakers.

•  Adjust the volume to the optimum level.

•  Check the cords and connections.

•  The unit does not work at all.

Reset the unit (see page 3).

•  “Connect Error” appears on the display.

Remove the control panel, wipe the connector, then 

attach it again (see page 3).

FM/AM

•  SSM automatic presetting does not work.

Store stations manually.

•  Static noise while listening to the radio.

Connect the aerial firmly.

•  “AM” cannot be selected.

Check the <

Source Select

> 

=

 <

AM Source

> setting 

(see page 31).

Disc playback

•  Disc cannot be played back.

Insert the disc correctly.

•  CD-R/CD-RW cannot be played back.

•  Tracks on the CD-R/CD-RW cannot be 

skipped.

•  Insert a finalized CD-R/CD-RW.

•  Finalize the CD-R/CD-RW with the component which 

you used for recording.

•  Disc can neither be played back nor ejected. •  Unlock the disc (see page 12).

•  Eject the disc forcibly (see page 3).

•  Disc sound is sometimes interrupted.

•  Stop playback while driving on rough roads.

• Change the disc.

•  Check the cords and connections.

•  Disc cannot be recognized (“No Disc,” 

“CD Loading Error,” or “Eject Error” flashes).

Eject the disc forcibly (see page 3).

•  “Please Eject” appears on the display.

This occurs sometimes due to over-heating. Eject the disc 

or change to another playback source.

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REFERENCES

Continued on the next page

Symptoms

Remedies/Causes

MP3/WMA/AAC playback

•  Disc cannot be played back.

•  Use a disc with MP3/WMA/AAC tracks recorded in 

a format compliant with ISO 9660 Level 1, Level 2, 

Romeo, or Joliet.

•  Add the extension code <.mp3>, <.wma>, or 

<.m4a> to the file names.

•  Noise is generated.

Skip to another track or change the disc. (Do not add 

the extension code <.mp3>, <.wma>, or <.m4a> to 

non-MP3/WMA/AAC tracks.)

•  A longer readout time is required 

(“Reading” keeps flashing on the display).

Do not use too many hierarchical levels and folders. 

•  Tracks do not play back in the order you 

have intended them to play.

The playback order is determined by the file name. Folder 

with numbers on the initial as their names are sorted in 

numerical order. However, folder with no numbers on 

the initial of their names are sorted according to the file 

system of the CD.

•  The elapsed playing time is not correct.

This sometimes occurs during playback. This is caused 

by how the tracks are recorded on the disc (eg. variable 

bit rate).

•  “Please Eject” appears on the display.

Insert a disc that contains MP3/WMA/AAC tracks.

•  “No File” appears on the display.

Selected folder is an empty folder 

*

. Select another folder 

that contains MP3/WMA/AAC tracks.

•  “Not Support” appears on the display and 

track skips.

Skip to the next track encoded in an appropriate format 

or to the next non-copy-protected WMA track.

•  Correct characters are not displayed (e.g. 

album name).

This unit can only display letters (capital: A – Z, 

small: a – z), numbers, and a limited number of symbols 

(see page 39).

USB device

•  Noise is generated.

The track played back is not an MP3/WMA/AAC/WAV 

track. Skip to another file. (Do not add the extension code 

<.mp3>, <.wma>, <.m4a>, or <.wav> to non-MP3/

WMA/AAC/WAV tracks.)

•  “Reading” keeps flashing on the display.

•  Readout time varies depending on the USB device.

•  Do not use too many hierarchy or folders.

•  Turn off the power then on again.

•  Do not pull out or connect the USB device repeatedly 

while “Reading” is displayed on the display.

*  Folder that is physically empty or folder that contains data but does not contain valid MP3/WMA/AAC track.

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Symptoms

Remedies/Causes

USB device

•  “No File” appears on the display.

Check whether the selected folder, the connected USB 

device, or the iPod/iPhone contains a playable file.

•  “Read Failed” appears on the display.

The connected USB device is not working properly. 

Connect the USB device again.

•  Tracks/folders are not played back in the 

order you have intended.

The playback order is determined by the file name. 

Folders with numbers on the initial of their names 

are sorted in numerical order. However, folders with 

no numbers on the initial of their names are sorted 

according to the file system of the USB device.

•  “Cannot Play” appears on the display.

•  “No USB” appears on the display.

•  The unit cannot detect the USB device.

•  Check whether the connected USB device or the iPod/

iPhone is compatible with this unit.

•  The USB device is not connected properly. Connect the 

USB device again.

•  “Not Support” appears on the display and 

track skips.

Check whether the track is a playable file format.

•  Correct characters are not displayed (e.g. 

album name).

This unit can only display letters (capital: A – Z, 

small: a – z), numbers, and a limited number of symbols 

(see page 39).

•  While playing a track, sound is sometimes 

interrupted.

The tracks have not been properly copied into the USB 

device. Copy tracks again into the USB device, and try 

again.

Bluetooth

•  The unit does not detect the Bluetooth 

device.

•  Search from the Bluetooth device again.

•  Reset the unit. When “Wait Pair” appears on the 

display, search from the Bluetooth device again.

•  The unit does not make pairing with the 

Bluetooth device.

Enter the same PIN code for both the unit and target 

device.

•  Echo or noise occurs.

Adjust the microphone unit’s position.

•  Phone sound quality is poor.

•  Reduce the distance between the unit and the 

Bluetooth cellular phone.

•  Move the car to a place where you can get a better 

signal reception.

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REFERENCES

Symptoms

Remedies/Causes

Bluetooth

•  The sound is interrupted or skipped 

during playback of a Bluetooth audio 

player.

•  Reduce the distance between the unit and the Bluetooth 

audio player.

•  Disconnect the device connected for Bluetooth Phone.

•  Turn off, then turn on the unit.

•  Connect the player again, when the sound is not yet 

restored.

•  The connected audio player cannot be 

controlled.

•  Check whether the connected audio player supports 

AVRCP (Audio/Video Remote Control Profile).

  (Operations depend on the connected audio player.)

•  Disconnect and connect the Bluetooth player again.

•  The unit does not response when you 

tried to copy the phonebook to the unit.

You may have tried to copy the same entries (as stored) to 

the unit. Press DISP or BACK to exit.

CD changer

•  “N0 Disc” appears on the display.

Insert a disc into the magazine.

•  “No Magazine” appears on the display.

Insert the magazine.

•  “Reset 08” appears on the display.

Connect this unit and the CD changer correctly and press 

the reset button of the CD changer.

•  “Reset 01” – “Reset 07” appears on the 

display.

Press the reset button of the CD changer.

•  The CD changer does not work at all.

Reset the unit (see page 3).

iPod/iPhone

•  The iPod/iPhone does not turn on or does 

not work.

•  Check the connecting cable and its connection.

•  Update the firmware version of the iPod/iPhone.

•  Charge the battery of the iPod/iPhone.

• Reset the iPod/iPhone.

• Check whether <

iPod Switch

> setting is appropriate 

(see page 31).

•  The sound is distorted.

Deactivate the equalizer either on this unit or the iPod.

•  Playback stops.

The headphones are disconnected during playback. Restart 

the playback operation.

•  “Cannot Play” appears on the display.

No tracks are stored. Import tracks to the iPod.

•  “Restricted” appears on the display.

Check whether the connected iPod/iPhone is compatible 

with this unit (see page 38).

Continued on the next page

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Symptoms

Remedies/Causes

iPod/iPhone

Only when connecting with the interface adapter

•  “No Files” appears on the display.

No tracks are stored. Import tracks to the iPod.

•  The iPod’s controls do not work after 

disconnecting from this unit.

Reset the iPod.

•  “Disconnect” appears on the display.

•  Check the connecting cable and its connection.

• Charge the battery.

•  No sound can be heard when connecting 

an iPod nano.

•  Disconnect the headphones from the iPod 

nano.

•  Update the firmware version of the iPod nano.

•  “Reset 01” – “Reset 07” appears on the 

display.

Disconnect the adapter from both this unit and 

iPod. Then, connect it again.

•  “Reset 08” appears on the display.

Check the connection between the adapter and 

this unit.

DAB tuner

•  “No DAB Signal” appears on the display.

Move to an area with stronger signals.

•  “Reset 08” appears on the display.

Connect this unit and the DAB tuner correctly and 

reset the unit (see page 3).

•  “Antenna Power NG” appears on the display.

Check the cords and connections.

•  The DAB tuner does not work at all.

Reconnect this unit and the DAB tuner correctly 

and reset the unit (see page 3).

•  Microsoft and Windows Media are either registered trademarks or trademarks of Microsoft Corporation in the 

United States and/or other countries.

•  The Bluetooth word mark and logos are owned by the Bluetooth SIG, Inc. and any use of such marks by Victor 

Company of Japan, Limited (JVC) is under license. Other trademarks and trade names are those of their respective 

owners.

•  “Made for iPod” means that an electronic accessory has been designed to connect specifically to iPod and has been 

certified by the developer to meet Apple performance standards.

•  “Works with iPhone” means that an electronic accessory has been designed to connect specifically to iPhone and 

has been certified by the developer to meet Apple performance standards.

•  Apple is not responsible for the operation of this device or its compliance with safety and regulatory standards.

•  iPod is a trademark of Apple Inc., registered in the U.S. and other countries.

•  iPhone is a trademark of Apple Inc.

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