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.
Encastrado
Los trabajos requeridos para la instalación de este aparato deben ser realizados por un instalador competente o autorizado y de acuerdo con las normas y regulaciones vigentes.