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Troubleshooting
Troubleshooting
Error checklist
If still operating problems with your transmission installation occur, please contact your local Sennhe-
iser agent for assistance.
Problem Possible causePossible solution
No operation
indication
Batteries are flat or rechargeable
battery is flat
Replace the batteries or recharge the
accupack
No audio signal
Transmitter and receiver are not on the
same frequency.
Set transmitter and receiver to the
same frequency .
The transmitter is out of range.
Reduce the distance between
transmitter and receiver.
RF signal available,
but no audio signal
The transmitter’s microphone is muted
(“MUTE”)
Deactivate the muting function
Defective microphone Replace microphone
Defective headphones Replace headphones
Audio signal has a
high level of
background noise
Transmitter sensitivity is adjusted too
low
see “Adjusting the sensitivity” on
page 47
Audio signal is
distorted
Transmitter sensitivity is adjusted too
high
see “Adjusting the sensitivity” on
page 47
L 2015:
red LED flashes
besides a charging
compartment
No contact with the rechargeable
battery (contacts are dirty or
rechargeable battery is not inserted
correctly)
Clean the contacts or insert the
rechargeable battery correctly
rechargeable battery is defective
(overaged or defective rechargeable
battery cells)
Replace the accupack
rechargeable battery temperature is
too low or too high
Always charge the rechargeable
battery at room temperature
Batteries (primary cells) or individual
rechargeable batteries have been
inserted
Only charge the BA 2015 accupack!