Check the black plastic connector block at the back. There are separator fins between the different pols on the inside, however, in my opinion they are inadequate and a stray strand of wire or whaetever could cause a short generating a burning smell and causing a potential fire hazzard. This isn't supposition. I've seen it happen. Have photgraphs to prove it.
Dave - answering own question for benifit of readers., February 2009
