RDAC ARCAM NEED SCHEMA ....

i i was send my rdac to repair and the teching men say that transistor was exploded and he doesnt know what is it bcz he cant see what write on this he search on database and no resualt he say to me if i can send him the schema of the rdac or to get the same dac from someone that have rdac and he can open and see .
so i need to know where or who can send me the sechema of the product or where i can find it (i will be glad to get link for that).
thanks alot and hope you or someone can help me