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Troubleshooting
Troubleshooting
The following checklist can help you solve some
problems which you may encounter when using
the unit. Before consulting it, check the connec-
Problem
General
The unit will not switch on.
No sound
Mode TUNER
Unable to receive stations.
Poor quality reception of radio station.
Preset stations are lost.
Mode USB
Unable to insert USB device.
The USB device cannot be read.
6
tions and follow the instructions in the user manual.
Do not use the unit in abnormal condition, for
example without sound, or with smoke or foul smell
Possible cause
Car ignition is not on.
Cable is not properly connected.
Fuse is burnt.
Volume is set at minimum or the mute function is on. Check the volume or switch the mute function off.
The antenna is not connected properly.
The antenna is not fully extended or it is broken.
The battery cable is not properly connected.
The USB device has been inserted the wrong way
round.
NTFS format is not supported.
can cause fire or electric shock, immediately stop
using it and call the store where you purchased it.
Solution
Turn your car key in the ignition.
Check cable connection.
Replace fuse with a new fuse of the same capacity.
Connect the antenna properly.
Fully extend the antenna and if broken, replace it
with a new one.
Connect the permanent live on the unit to the per-
manent live on the vehicle.
Insert it the other way around.
Check that the file system is in FAT or FAT32 for-
mat. Due to different formats, some models of sto-
rage devices or MP3 players may not be read.
TR7311U-OR TUNER
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