Denon Professional DN-F350 Guide D'utilisation page 12

Troubleshooting
If you encounter a problem, do the following:
•
Make sure all cables, devices, and/or media are properly and securely connected.
•
Make sure you are using the unit as described in this User Guide.
•
Make sure your other devices or media are working properly.
•
If you believe the unit is not working properly, check the following table for your problem and solution.
Problem
Power does not turn on.
The unit does not produce any sound,
or the sound is distorted.
No Device appears even when a USB
device is inserted.
Files on a USB device do not appear.
Files on a SD card or USB device
cannot play.
File names do not appear properly.
Audio from my Bluetooth device does
not play through the unit.
Connecting my Bluetooth device to
the unit requires a PIN.
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Solution
Make sure the unit is connected to a power outlet.
Make sure all cable, device, or media connections are
secure and correct.
Make sure none of the cables are damaged.
Make sure the settings on your amplifier, mixer, etc. are
correct.
Disconnect and reconnect the USB device to make sure it
is securely inserted.
Make sure the USB device is of a mass storage class or
compatible with MTP.
Make sure the USB device is formatted using a FAT16 or
FAT32 file system.
Do not use a USB hub or USB extention cable.
The unit does not supply power to USB devices. If your
USB device requires a power source, connect it to one.
Not all USB devices are guaranteed to work; some may
not be recognized.
Make sure the files are of a supported file format. Files
that are not supported by this unit will not appear.
Make sure the USB device uses a folder structure that the
unit supports: up to 999 folders (up to 8 folder levels,
including the root) and up to 999 files.
If your USB device is partitioned, make sure the files are
in the first partition. The unit will not show other partitions.
Make sure the files are of a supported file format. Files
that are not supported by this unit will not appear.
Make sure the files are not copyright-protected. The unit
cannot play copyright-protected files.
Make sure the files are using only supported characters.
Characters that are not supported will be replaced with a
"."
Make sure you have properly paired and connected your
Bluetooth device.
Make sure you have properly connected the Bluetooth
antenna to the terminal on the rear panel.
Improve the Bluetooth signal reception by moving your
Bluetooth device closer to the unit. Also, remove
obstacles (walls, furniture, etc.) so there is a clear line of
sight between your Bluetooth device and the unit.
Enter 0000 as the PIN. (Some older Bluetooth devices
may require you to enter a PIN.)
Please see:
Setup
Setup
Other Information > USB Devices /
SD Cards
Other Information > USB Devices /
SD Cards
Other Information > USB Devices /
SD Cards
Other Information > USB Devices /
SD Cards
Setup / Connection Diagram
and
Operation > Playing Audio from a
Bluetooth Device
Operation > Playing Audio from a
Bluetooth Device