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23
If a problem occurs ...
If a problem occurs ...
Problem Possible cause Solution
No operation
indicator –
headphones
cannot be
switched on
The battery pack is flat. Recharge the battery pack
(see page 9).
No audio signal
when the
audio cable is
connected
The jack plug of the
audio cable is not
properly connected.
Check the connection to your
audio source (see page 16).
No audio signal
during Bluetooth
connection
The headphones are
switched off.
Switch the headphones on
(see page 12).
The headphones are not
paired with an audio
source.
Check if the headphones are
paired. If necessary, pair the
headphones with the audio
source again (see page 14).
The Bluetooth function
on the headphones is
switched off.
Switch the Bluetooth function
on the headphones on
(see page 18).
The audio cable is
connected to the
headphones.
The connection of the audio cable
automatically switches off the
Bluetooth connection. Remove the
audio cable and then switch the
Bluetooth function on again
(see page 18).
The volume is adjusted
too low.
Increase the volume
(see page 18).
Headphones
cannot be paired
The pairing does not
work.
Check if the audio source supports
the A2DP profile. If not, use one of
the optional dongles.
The audio source is
switched off.
Switch the audio source on
(see page 13).
No audio signal
during Noise-
Gard operation
The headphones are
switched off.
Switch the headphones on
(see page 12).
The TalkThrough
function is switched on.
When in TalkThrough
mode, the audio signal
is not available.
Switch the TalkThrough function
off (see page 17).
Headphones do
not react to any
button press
The operation of the
headphones is faulty.
Remove the battery pack
from the headphones. Reinsert the
battery pack into the headphones.
Switch the headphones on again.
Bluetooth
connection
is suddenly
interrupted
The Bluetooth button
has been pressed too
long.
Switch the Bluetooth function on
(see page 18).
24


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