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.
Thank´s for your help, I already recived these manual from you
Text excerpt from page 34 (click to view)
Instrucciones para el uso
Parrilla insertable
Para limpiar las paredes laterales puede usted retirar las parrillas intermedias derecha e izquierda del horno. Extracción y colocación de las parrillas amovibles 0 1. Retire por abajo la parrilla de la pared del horno y desencájela hacia arriba. 2. Para colocarla otra vez, encájela por arriba y acomódela oprimiendo hacia abajo.
1 1