8
TROUBLESHOOTING
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.
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.
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.
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Summary of Contents for TR7422U-OR
Page 1: ...TR7422U OR RADIO USB MP3 WMA 24V OWNER S MANUAL TR7422U OR_EN indd 1 28 05 15 15 50 ...
Page 5: ...5 System Setting Item List TR7422U OR_EN indd 5 28 05 15 15 50 ...
Page 7: ...7 Electrical Connections TR7422U OR_EN indd 7 28 05 15 15 50 ...
