I have some data sheets available about this device on my webdrive located he
http://www.skybuck.org/GigaWorksS750/
(It's a rar file and will need to be extracted with something like winrar, though windows 7 has it also built-in)
Perhaps these data sheets can shed some more light on this device.
Alternative data sheets might also be located he
http://www.tgahinfo.homecall.co.uk/S750%20PSU/
Bye,
Skybuck.