Hi Tony, Thanks for the info. I did a bit of testing and got unusual results, well unusual to me anyway.
Across the 0v and +v holes at the side there seems to be a voltage of 18v though this voltage seems to be just after the switching stage and bypasses most of the low voltage side. The pins of the header are strangely varying from about +23 to + 17, with the rj45 following suit. All this is being done without the LSW pin being unconnected so I don't actually know its function. I thought maybe for dimming from a suitable leading edge AC dimmer?
I have dropped them a line at Itran but from your words I guess I dhouldn't hold my breath.
Background of the dimmers, I got a box of 30 or so at a local recycle centre brand new for 25p UK about 40 US cents. I thought that the hi quality caps and other discretes would make my purchase worthwhile. Any more thoughts please let me know. Thanks, Al