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26
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 Receiver and
transmitter are not
on the same channel
Set receiver and
transmitter 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 disp lay
panel
Transmitter is muted
(“MUTE”)
Deactivate the
muting function
(see operating
manual of the
transmitter)
Receiver’s squelch
threshold is adjusted
to o high
See “Adjusting the
squelch threshold”
on page 23
Transmitter doesn’t
transmit a
pilot tone
S witch th e pil ot to ne
transmission on the
transmitter on or
s wi tch the pilo t to ne
evaluation on the
receiver off
Audio signal
has a high
level of
background
noise
Transmitter
sensitivity is
adjusted too low
Adjust the
transmitter
sensitivity correctly
Receiver’s AF output
level is adjusted too
low
See “Adjusting the
audio output level”
on page 23
Audio signal
is distorted
Transmitter
sensitivity is
adjusted too high
Adjust the
transmitter
sensitivity correctly
Receiver’s AF output
level is adjusted too
high
See “Adjusting the
audio output level”
on page 23
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” on
page 22