5.2SEM 181, SDM 159, SDM 169, TS 100 Transmitters

Problem	Possible Cause	Solution
No function	• Transmitter and receiver have different	• Make sure the transmitter and the
No function	• Transmitter and receiver have different	• Make sure the transmitter and the
	frequencies	receiver are on the same frequency
	• Insufficient battery voltage	• Replace the battery
	• Insufficient battery contact, battery	• Check the battery and insert it again
	inserted incorrectly

No RF on the	• Transmission distance between transmitter	• Reduce the distance between
receiver	and receiver is too far	transmitter and receiver
	• Defective antenna (TS 100 only)	• Check the antenna and replace it,
		if necessary

Noise/chirping	• Interference from other transmitters	• Switch off the other transmitters
	• Two transmitters using the same frequency	• Avoid using two transmitters with the
		same frequency
	• Battery of the transmitter is too weak	• Replace the battery

Power On battery	• Battery of the transmitter is too weak	• Replace the battery
condition LED

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.