Accessories and spare parts
37
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 15 and
page 20).
No operation indication No mains connection Check the connections of the mains unit.
No RF signal at the
receiver
Transmitter and receiver are not on the
same channel
Set the transmitter and receiver to the same
channel. To do so, use the synchronization
function (
see page 16
).
If “RF Mute” additionally appears on the
transmitter display:
RF signal is deactivated
Activate the RF signal (see page 16).
Very weak RF signal at
the receiver
Transmission range is exceeded Reduce the distance between receiver and
transmitter.
Reposition the antennas.
Increase the transmission power (see page 21).
Check the squelch threshold setting on the
receiver.
Reduce the squelch threshold (see the
instruction manual of the receiver).
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 20).
Audio signal has a high
level of background noise
Transmitter sensitivity is adjusted too
low
Adjust the transmitter sensitivity correctly.
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).
