Hi Marie!
your DS2 is a very rare synthetizer ( Look at the number on the identification plate, for exemple, my one is 500 ) So parts are rare too ! I just have to make repairs on mine on the 'Poly section', and the electronician had to order parts from Paris in a specialized store.
For the manual, do you search the owner's manual or the electronic shematics ?
(are you an electronic woman ?)
Benjamin. France