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Troubleshooting
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 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
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
Reduce the squelch
threshold
Transmitter doesn’t
transmit a
pilot tone
Activate the pilot
tone transmission
Audio signal
has a high
level of
background
noise
Transmitter
sensitivity is
adjusted too low
See “Adjusting the
sensitivity” on
page 53
Receiver’s AF output
level is adjusted too
low
Increase the audio
output level
Audio signal
is distorted
Transmitter
sensitivity is
adjusted too high
See “Adjusting the
sensitivity” on
page 53
Receiver’s AF output
level is adjusted too
high
Reduce the AF
output level
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