Troubleshooting - Lehmannaudio Linear USB II Manual De Instrucciones

52 Linear USB II

Troubleshooting

EN
Fault Cause
LED indicator is
Power supply or power
not on. cord is not connected to
a power outlet.
Device is not turned on.
Fuse is defective.
No headphone Device receives no sound
signal. signal.
Volume control is set to
minimum.
Headphone is not
plugged into the socket.
USB cable is not plugged
in.
USB cable is not plugged
into computer.
USB cable is defective.
Solution
Connect the power supply
or power cord resp. with the
power outlet.
Turn on the device with the
mains switch located on the
rear side of the unit.
First make sure that the two
points mentioned above can be
excluded as error causes. Then
check the fuse: It the wire is
broken, replace the fuse. If
the fuse fails several times in
a row, the device is probably
faulty. In this case take the
device to the dealer where you
purchased it.
Make sure the signal source
provides a signal to the device.
Set the volume control to the
desired volume level.
Plug the headphone into the
headphone socket.
Insert USB cable into socket.
Plug USB cable into computer.
Replace USB cable.
No headphone USB DAC is not selected
signal. as output device on
computer.
No signal at the
Headphone is plugged
pre-out. into the left headphone
output.
Device receives no sound
signal.
Volume control is at
minimum.
Signal is too soft. Volume control is not
turned up high enough.
Signal source is too weak.
Gain factor is too low.
One or several of the
internal controls within
the computer are not
set to maximum (in USB
mode).
Linear USB II 53
Select USB DAC as output
EN
device on computer.
Pull the headphone connector
out of the device or plug it into
the right headphone socket.
Make sure the signal source
provides a signal to the device.
Turn the volume control to the
desired volume level.
Turn up the volume control
higher.
Select another signal source or
raise its level, if possible.
Increase the gain factor
according to the user manual
and adjust the DIP switch
accordingly.
Check all the internal controls
and set them all to max. when
needed. Up to three different
controls can affect the level:
separate playback control on
≠
the mixer
master fader
≠
control within the application
≠
(e. g. YouTube)