There are several websites that sell manuals. You could do a web search for "Dual CS 1245 manual" and see what you find. Some people sell manuals on ebay, too.
Perhaps someone reading this forum has one they can photo copy and send to you.... Good Luck. Unfortunately, I don't.
I would try printing out the English manual for the model most similar to mine from the library here and hope that it would give me at least some guidance.