Lehmannaudio Linear USB II Mode D'emploi page 28

54 Linear USB II
Headphone signal The cable coming from
EN
does not respond the analogue signal
to the volume source has been plugged
control. into the output sockets.
Signal only on one
DIP switches have been
channel. set unequally.
Connection cable
between source and
headphone amplifier
has a loose contact, has
not been fully inserted
into the sockets or is
defective.
Left and right The channels in the con-
channels have nection cable have been
been messed up.
interchanged.
The headphone has been
put on the wrong way
round.
Signal is dis- The input level is too
torted. high.
The headphone is
defective.
The signal itself is
distorted.
The gain factor and the
overall volume are too
high.
Plug the cable coming from the
analogue signal source into the
input sockets.
Check the settings of both DIP
switches and, if applicable,
correct them according to this
user manual.
Check the connection cable for
a faulty contact, loose pushfit
and defects and replace it
when necessary.
Check all connection cables in
use and reverse the channels, if
necessary.
Check if you have put on the
headphone in line with its
labelling and, if needed, put it
on correctly
Turn down the volume of the
connected signal source.
Use another headphone set.
Play another track or use
another sound carrier.
Lower the gain factor accord-
ing to this user manual and set
the DIP switches accordingly.
There is an audi- Several connected devices
ble hum. cause a ground loop.
Radio interfer- Wrong signal cables were
ence can be heard used.
in the background
Screen on signal cable is
defective.
If a problem cannot be remedied with the help of this summary, please contact
the specialist retailer where you purchased the device. If this is not possible, you
can easily find another competent dealer in your area with the dealer search at
www.lehmannaudio.com/service/dealers/.
Linear USB II 55
Establish a correct earth con-
EN
nection. If necessary, contact
an electrician.
Use suitable signal cables.
Check the screen on the signal
cable and replace the cable, if
necessary.