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If a problem occurs ...
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If a problem occurs ...
If a problem occurs that is not listed in the above table or if the problem cannot be solved with
the proposed solutions, please contact your local Sennheiser partner for assistance.
To find a Sennheiser partner in your country, search at www.sennheiser.com under “Service
& Support”.
Problem Possible cause Possible solution
Transmitter cannot be
operated, “Locked”
appears on the display
panel
Lock mode is activated Deactivate the lock mode
(see page 14 and page18).
No operation indication No mains connection Check the connections of the
mains cable (see page 12).
No RF signal at the
receiver
Transmitter and receiver are
not on the same channel
Synchronize the transmitter
with the receiver (see
page 15).
If “RF Mute” additionally
appears on the transmitter
display:
RF signal is deactivated
Activate the RF signal
(see page 14).
Very weak RF signal at
the receiver
Transmission range is
exceeded
Check the squelch threshold
setting on the receiver.
Reduce the distance between
receiver and transmitter.
Increase the transmission
power (see page 19).
Receiver’s squelch threshold is
adjusted too high
Reduce the squelch threshold
(see the instruction manual of
the receiver).
Reposition the antennas.
RF signal available,
no audio signal at the
receiver
No input signal at the
transmitter
Check the audio level on
the transmitter display
(see page 7).
Very low input signal Check the audio level on the
transmitter display (see
page 7), increase the level of
the input signal or adjust the
input sensitivity (see page 19).
Audio signal has a high
level of background
noise
Transmitter sensitivity is
adjusted too low
Adjust the transmitter sensi-
tivity correctly (see page 19).
Audio signal is distorted If “AF PEAK” additionally
appears on the transmitter
display:
transmitter sensitivity is
adjusted too high
Adjust the transmitter
sensitivity correctly.
Receiver’s audio output level
is adjusted too high
Reduce the audio output level
(see the instruction manual of
the receiver).