item in question doesn't have a details plate or manufacturer's ident
The cd player as a whole or the transformer?
Have a look on the circuit board for details of the board manufacturer model etc. Then hit the news groups (easy via the google groups search.) There are some very good eletrical repair groups on there. Often with access to repair manuals etc.
If it has an FCC number i.e. approval to be sold in the USA then you can look up details of the manufacturer or designer on thier website:
http://www.fcc.gov/oet/fccid/
Good luck.
Memetic