Actually, I was looking for this information for 3 years!...now thanks to you, the manual is on my hands and of great help, cause I understand now where I was doing wrong connections and wires...excellent, I'll be back to you if in need, thank you.
This manual covers the main equipment features only. While it also includes the procedure for saving and loading from the now long obsolete memory cards it does not mention the how to operate with the optional floppy drive interface so I am still at a loss about how to use this! Note that there is a separate manual covering the MIDI interface and programming via the keyboard, not included in this download. You will also need to get hold of this if you want to use the MIDI interface properly. Basically there is little difference between this manual and the free to download manual for the similar PR60 model.
The manual was properly scanned and perfectly readable. The only small problem is that I couldn't use my dear Ctrl + F to find a word I needed.
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.