B&W ASW850 circuit diagrams

[mattross]

This is a long shot...my B&W ASW850 subwoofer has failed and is currently at a repairers. As the repairer does not have any technical documentation and circuit diagrams for this sub he is not able to diagnose the problem. He gave me some technical detail but it doesn't mean much to me and he cannot continue without some details on how it has been designed.

Would anyone know how I might get hold of circuit diagrams for this unit?

[sidmini]

you can download the service manual here: http://www.bwgroupsupport.com/manuals/bw-service

search for you sub...