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TR722U-BU RADIO / USB MP3 / WMA 24V
Troubleshooting
n
Troubleshooting
The following checklist can help you solve
some problems which you may encounter when
using the unit. Before consulting it, check the
connections 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 can cause fire or electric shock, immediately
stop using it and call the store where you
purchased it.
Problem
Possible cause
Solution
General
The unit will not switch on.
Car ignition is not on.
Cable is not properly connected.
Fuse is burnt.
Turn your car key in the ignition.
Check cable connection.
Replace fuse with a new fuse of the same capacity.
No sound.
Volume is set at minimum or the mute function is on.
Check the volume or switch the mute function off.
The unit or screen does not work normally.
The unit system is unstable.
Press the RESET button.
Mode TUNER
Unable to receive stations.
The antenna is not connected properly.
Connect the antenna properly.
Poor quality reception of radio station.
The antenna is not fully extended or it is broken.
Fully extend the antenna and if broken, replace it
with a new one.
Preset stations are lost.
The battery cable is not properly connected.
Connect the permanent live on the unit to the
permanent live on the vehicle.
Mode USB
Unable to insert USB device.
The USB device has been inserted the wrong way
round.
Insert it the other way around.
The USB device cannot be read.
NTFS format is not supported.
Check that the file system is in FAT or FAT32 format.
Due to different formats, some models of storage
devices or MP3 players may not be read.
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