20 Most Recent Sennheiser HDR 120 Consumer Headphones - Page 11 Questions & Answers

Hi Cathy.. it sounds like you might be connected to the wrong jacks instead of the output that the headphones need. Most high quality stereo headphones have a single 1/4" stereo plug that would readily plug into a 1/4" jack on the front of the stereo labeled "PHONES" or HEADPHONES". Many lower quality "computer headphones" or headsets have two 1/8" plugs. One is often black or red and is for an included microphone that may be a boom type (shown below) connected to one of the speakers or an "in-line" type built into the cord itself. The headphone speakers in the headset get their signal from the other plug - which is usually green; but could be any color really. There should be 3 metal parts on the stereo headphone plug. The tip, the middle ring and the bottom ring. Many times the mic is mono (not stereo) and only has only a tip and a bottom ring on the plug. You can see stereo headphone and microphone plugs he picture below:Computer Headphones or "Headset" with mic and phone plugs.Your Yamaha stereo will probably NOT have 1/8" jacks to directly plug the headphone into. You can buy an adapter that you would plug your headphones into and then plug the adapter into the 1/4" jack on the stereo. One is pictured below: Front and rear views of a "1/4" to 1/8" Stereo Adapter Plug" The front plugs into the stereo and the the smaller 1/8" headphones plug into the rear.I hope this helps & good luck!

I think this is common problem for headphones. To fix it you will have to solder cord's wires back to plug. If you have tools and some experience you'll be fine

Hello
Provide the model number of your Sennheiser Headphone please. Without it, it is not possible to place a solution to this problem. Provide the details to me by Fixya. OK.

Hi,

Often the rubber button is pushed into the microphone.
You can easily disasemble the unit.
Just open the batterycase, you will find some small torx screws.

Regards,
Gerard

probably ..they discharged to the max..and this way the connection was reset...If they are still functional ..you have to pair them again with the transmitter... and will work again ...If they work ..avoid in the future to discharge them totally ...
To pair they usually have a button that have to be pressed and will blink until picks up the signal ..or take a look in the manual to see the exact procedure for this model ..