Turns out this was not the manual i was looking for. The concertmate 670 keyboard i have is a "Realistic" model made for Radio Shack and none of the diagrams on the owners manual i received matches up. HOWEVER, I must say the service Owners Manual provides was fast and efficient by being available online. The manual was in good readable condition and easily downloaded.
Thank´s for your help, I already recived these manual from you
Text excerpt from page 9 (click to view)
Replacing the connecting cable
Replace the connecting cable if it is damaged. To do so, please proceed as follows: Remove the ear cushion. Grasp behind the ear cushion and pull it up and away from the earcup. Loosen the screw and remove it. .
Remove the cover from the earcup Pull the connector
out of the socket.
Remove the antikink protection of the connecting cable from the holding device . Insert the antikink protection of the new connecting cable into the holding device. Plug the connector of the new connecting cable into the socket as shown in the diagram on the left. Put the cover back onto the earcup Replace the screw and tighten it. .
Slide the ear cushion onto the earcup.
Converting the headphones into a headset
If you wish to convert your headphones into a headset, please contact your Sennheiser service partner who will equip the headphones with a microphone.
