Question about Sennheiser RS 120 Consumer Headphones

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No green On/Off light. Charge light is red. I hear only static.

My headphones worked previously--I cannot figure out what the deal is. The red charge light is on, but the green on/off light is not. When I start my audio (I use a foot pedal to play audio for medical transcription), I get only static. I have tried changing the channel on the unit base and scrolling the tuner on the headphones to no avail. Can anyone help me?

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  • Anonymous Feb 14, 2009

    Same problem - just started. Like the transmitter won't turn on. Tried unplugging it to reset it, but didn't work. This is not an interference problem - it's a problem with the base not turning on to transmit the audio.

  • Anonymous Mar 03, 2009

    Headphones still work. base still charges, but it no longer turns on and transmitts. My headphones worked just a day ago... nothing changed.

  • tttchen Mar 04, 2009

    I have the same problem. The only "fix" I've found that consistently works is (i) plug in the base and turn on the headset, (ii) unplug the base's audio cables from the TV then (iii) plug the audio cables back in. when I do this, the green light goes on and it transmits.

  • tucker_india Mar 09, 2009

    Same problem. They worked fine on Friday, not working on Monday. Red light for charging - no green light when the audio is on, does not transmit.


  • gregs-2 Mar 13, 2009

    Confirm same problem and same "solution" tttchen - unplug and then plug back in to TV. I have checked all the cables with multimeter and all are ok and techie friend suggested it maybe the TV sound jacks, but if others are having the same problem, this is probably not the case. Anyway, very annoying and very frustrating.



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  • 155 Answers

Two things.. Check the batteries..
Also.. since these headphones have to have a signal sent to them to activate transmission (green light simply indicates they are receiving a signal) it can take a few moments after the signal begins to activate them.
I would hazard a guess that when you unplug the cables and then plug them back in.. the feedback that generates activates the base much the same as a regular audio signal would
Finally.. make sure the source is a fixed output.. if not.. and its variable..you will have to increase the output or volume to activate the base..

Good luck!

Posted on Apr 24, 2009

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1. Press and hold the power button on the headphones. See Figure 1.
headphone.jpg
Figure 1

2. Continue to hold the button down until the LED starts flashing red/blue in an alternating pattern. Release the button when the LED starts flashing red/blue. See Figure 2.
headphone-flash.gif
Figure 2
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receiver.jpg
Figure 3
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receiver-flash.gif
Figure 4
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headphone-volumeup.jpg
Figure 5
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headphone-flash2.gif
Figure 6
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receiversolid.jpg
Figure 7
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