Shredder running problem, Rexel 100x?

Manual reverse - comes up jam. Manual forward - works momentarily, then comes up jam. Auto - manual feed - paper is fed, then reversed and comes up jammed. Inside of machine is clean and free running, appears to be a PCB, motor or some sort of current monitoring fault. As there doesn't appear to be any tech. data or spares for these imports -- any ideas -- besides buying a new machine??