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• Transmitter and receiver have different
frequencies
• Insufficient battery voltage
• Insufficient battery contact, battery
inserted incorrectly
• Make sure the transmitter and the
receiver are on the same frequency
• Replace the battery
• Check the battery and insert it again
• Transmission distance between transmitter
and receiver is too far
• Defective antenna (TS 100 only)
• Reduce the distance between
transmitter and receiver
• Check the antenna and replace it,
if necessary
No RF on the
receiver
No function
Problem
Possible Cause
Solution
5.2
SEM 181, SDM 159, SDM 169, TS 100 Transmitters
6.
Maintenance
In the unlikely
event of equipment failure, the product should be returned to your bey-
erdynamic dealer. Failure to do so will render the guarantee null and void.
7.
Licensing
In most countries
around the world, wireless systems must be approved for use by the
authorities and it may be necessary to obtain a licence to use it legally. Your local beyerdynamic
dealer will be able to give you details on wireless system regulations for your area.
The components of the Opus 100 system are approved according to the directive 99/5/EEC
under the CE 0682 ! identification.
• Interference from other transmitters
• Two transmitters using the same frequency
• Battery of the transmitter is too weak
• Battery of the transmitter is too weak
• Switch off the other transmitters
• Avoid using two transmitters with the
same frequency
• Replace the battery
• Replace the battery
Noise/chirping
Power On battery
condition LED
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