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Troubleshooting
The following notes and further detailed information on our website should help you to rectify malfunctions. If this does
not lead to success, please contact our hotline
notes.
Problem
The device produces no
sound.
The subwoofer hums.
The playback is noisy.
No playback via USB
soundcard:
During operation using the
USB interface interference
and dropouts occur.
Sound suddenly cuts out
during playback using
standard PC programmes
such as iTunes or Internet
Explorer. The sound comes
back after closing the ap-
plication.
12
• Concept C 300
00800 - 200 300 40 (free of charge). Please also observe the warranty
Possible cause
The wrong source has been se-
lected.
Volume is set to "0".
Fuse has blown.
The humming is caused by mains
power failures.
The humming is caused by a multi-
outlet power strip.
Basically the Concept C 300 is
a very low noise system. Noise
is usually due to the high quality
reproduction of the speaker system
"revealing" the poor quality of a
signal source (e.g. from MP3 files).
Pairing failed.
Windows Vista and Windows 7
both have an active power-saving
mode ex-works which does not pro-
vide a constant supply of sufficient
power to the USB port.
In Windows 7 and Vista power op-
tions there is an option to suspend
USB peripheral devices when
inactive. This can also include the
integrated USB soundcard of the
Concept C 300.
Solution
Select the right source (seepage 10)
Increase the volume.
1.
Disconnect the power
cord.
Carefully pull out the
fuse holder from the
mains connection
terminal.
Purchase a line filter and connect it to the device.
Use another multi-outlet power strip or connect the
subwoofer directly into the wall socket. It may help to
insert the plug into the socket the other way round.
Make sure that the source is sending a clear signal
to the Concept C 300.
The USB soundcard must be connected to the com-
puter and the Concept C 300 must be switched on.
Now press the button 12
and the small button on the USB soundcard (see ar-
row) at the same time for 10 seconds.
For this reason we strongly recommend disabling the
power-saving mode for the USB port. To be found
under: Control panel\System\Power options.
Disable this setting.
2.
spare
Press out the old fuse.
Insert the new fuse (2 Al
time-lag fuse) and push the
holder back into place.
on the remote control
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