40
The disc does not play back.
Defective or dirty disc.
The CD-Rs/CD-RWs are not for audio use
(page 35).
MP3/WMA/AAC files cannot be played back.
The disc is incompatible with the MP3/WMA/
AAC format and version. For details on
playable discs and formats, visit the support
site.
MP3/WMA/AAC files take longer to play back
than others.
The following discs take a longer time to start
playback.
– A disc recorded with a complicated tree
structure.
– A disc recorded in Multi Session.
– A disc to which data can be added.
The display items do not scroll.
For discs with very many characters, those may
not scroll.
“AUTO SCR” is set to “OFF.”
– Set “A.SCRL-ON” (page 33).
– Press and hold
(SCRL).
The sound skips.
Installation is not correct.
– Install the unit at an angle of less than 45° in
a sturdy part of the car.
Defective or dirty disc.
USB playback
You cannot play back items via a USB hub.
This unit cannot recognize USB devices via a
USB hub.
Cannot play back items.
A USB device does not work.
– Connect it again.
A USB device takes longer to play back.
The USB device contains files with a
complicated tree structure.
The sound is intermittent.
The sound may be intermittent at a high-bit-
rate of more than 320 kbps.
Pandora® connection is not possible.
Shut down Pandora® application on the mobile
device, and then launch again.
Bluetooth function
The connecting device cannot detect this
unit.
Before the pairing is made, set this unit to
pairing standby mode.
While connected to a Bluetooth device, this
unit cannot be detected from another device.
– Disconnect the current connection and
search for this unit from another device.
When the device pairing is made, set the
Bluetooth signal output to on (page 20, 21, 22).
Connection is not possible.
The connection is controlled from one side
(this unit or Bluetooth device), but not both.
– Connect to this unit from a Bluetooth device
or vice versa.
Check the pairing and connection procedures
in the manual of the other device, etc., and
perform the operation again.
The name of the detected device does not
appear.
Depending on the status of the other device, it
may not be possible to obtain the name.
No ringtone.
Adjust the volume by rotating the control dial
while receiving a call.
Depending on the connecting device, the
ringtone may not be sent properly.
– Set “RINGTONE” to “1” (page 20).
The front speakers are not connected to the
unit.
– Connect the front speakers to the unit. The
ringtone is output only from the front
speakers.
The talker’s voice volume is low.
Adjust the volume level.
The talker’s voice cannot be heard.
The front speakers are not connected to the
unit.
– Connect the front speakers to the unit. The
talker’s voice is output only from the front
speakers.
Summary of Contents for MEX-BT31PW
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