Turns out this was not the manual i was looking for. The concertmate 670 keyboard i have is a "Realistic" model made for Radio Shack and none of the diagrams on the owners manual i received matches up. HOWEVER, I must say the service Owners Manual provides was fast and efficient by being available online. The manual was in good readable condition and easily downloaded.
perfect! you just sent to me the copy in Italian witout even my specification!!!! so you are really smart cooperative and efficient. To my opinion the best place all over to get a manual of electronics!!!!