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If problems occur...
Error checklist
If problems occur that are not listed in the above table or if the problems cannot be solved with the proposed
solutions, please contact your local Sennheiser agent for assistance.
Problem Possible cause Possible solution
No operation indication Batteries are flat or
accupack is flat
Replace the batteries or
recharge the accupack
No mains connection (EM 300 G2) Check the connections of the mains unit
No RF signal Transmitter and receiver are not on the
same channel
Set transmitter and receiver to the
same channel
Transmitter is out of range Check the squelch threshold setting
(see “Adjusting the squelch threshold
(EM 300 G2 only)“ on page 31) or
reduce the distance between
transmitter and receiving antenna
RF signal available, no audio
signal, “MUTE” display appears
on the display panel
Transmitter is muted (“MUTE”) Deactivate the muting function
Receiver’s squelch threshold is adjusted
too high
See “Adjusting the squelch threshold
(EM 300 G2 only)” on page 31
Transmitter doesn’t transmit a
pilot tone
See “Activating/deactivating the pilot
tone transmission or pilot tone
evaluation” on page 33
Audio signal has a high level of
background noise
Transmitter sensitivity is adjusted too
low
See “Adjusting the sensitivity
(transmitters only)” on page 30
Receiver’s AF output level is adjusted
too low
See “Adjusting the audio output level
(EM 300 G2 only)” on page 31
Audio signal is distorted Transmitter sensitivity is adjusted too
high
See “Adjusting the sensitivity
(transmitters only)” on page 30
Receiver’s AF output level is adjusted
too high
See “Adjusting the audio output level
(EM 300 G2 only)” on page 31
No access to a certain channel During scanning, an RF signal has been
detected on this channel and the
channel has been locked
See “Scanning the channel banks for
free channels (EM 300 G2 only)” on
page 29
During scanning, a transmitter of your
system operating on this channel has
not been switched off
See “Multi-channel operation” on
page 30