26• Is more than one microphoneassigned to the same channel?→ Assign a channel (frequency)that is not used by anothermicrophone.• Are several microphones beingused in close proximity?→ Move the microphone furtheraway.• Is the microphone in use in a loca-tion very close to the infrared sen-sor?→ Move the microphone furtheraway.• Are there any other infrared devicesor noise sources in use nearby?→ Reduce the distance betweenmicrophone and infrared sen-sor.• Are the battery contacts/poles dirty?→ Clean the battery contacts/poles.• Is the transmitting channel of hemicrophone matched to the receiv-ing channel of the receiver?→ Set the transmitting channel ofthe microphone to a receivingchannel of the receiver used.• Is the channel select switch in aposition where it has firmly clickedinto place?→ Check the position of the chan-nel select switch.InterferenceContinuous noiseNo reception at all(No audio output fromthe receiver, or receptionindicator does notrespond)Symptom Ref. pagesCause/solution11, 1255, 65, 6411, 1211, 12