JVC KW-V640BT Instruction Manual page 51

Troubleshooting Troubleshooting
iPod/iPhone
No sound comes out of the speakers.
→ Disconnect the iPod/iPhone, then connect it again.
→ Select another source, then reselect "iPod".
The iPod/iPhone does not turn on or does not
work.
→ Check the connection.
→ Update the firmware version.
→ Charge the battery.
→ Reset the iPod/iPhone.
Sound is distorted.
→ Deactivate the equalizer either on this unit or the
iPod/iPhone.
A lot of noise is generated.
→ Turn off (uncheck) "VoiceOver" on the iPod/ iPhone.
For details, visit <http://www.apple.com>.
No operations are available when playing back a
track containing artwork.
→ Operate the unit after the artwork has loaded.
"Authorization Error" appears.
→ Check whether the connected iPod/iPhone is
compatible with this unit. (Page 47)
WebLink™/Waze
WebLink™/Waze cannot be started.
→ Check whether the latest version of WebLink™ App
and/or Waze App is installed on the connected
smartphone.
→ Check the connection.
→ Charge the battery.
→ Reset the smartphone.
→ Reconnect your smartphone.
Radio
SSM automatic presetting does not work.
→ Store stations manually. (Page 18)
Static noise while listening to the radio.
→ Connect the antenna firmly.
AV-IN
No picture appears on the screen.
→ Turn on the video component if it is not on.
→ Connect the video component correctly.
Spotify
"Check App" appears.
→ The Spotify application on the connected device
has not started up.
→ The Spotify application is not installed on the
connected device.
→ Reconnect your smartphone.
→ Restart Spotify application.
"Please login or sign up." appears.
→ You have not been signed into Spotify.
"Please check internet connection." appears.
→ Check the internet connection.
"Unable to start Spotify." appears.
→ Restart Spotify application.
→ Spotify application cannot be started or played in
current condition.
"Please update the Spotify app on the phone."
appears.
→ The Spotify application on the connected device is
not the latest version. Update the application.
ENGLISH 49