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 9 (click to view)
(use liqud AJAX or other diswashing liquid), and well wrung. All spills must be cleaned up immediately, while the burner is still warm. Use the cleaning agent supplied with the unit. Remove spots caused by utensils with aluminium bottoms, or burned grease, by polishing with the cleaning agent supplied with the unit. In extreme cases polishing may have to be repeated several times in order to remove the blemish entirely. After clean-up of any of the burners, the entire ceramic surface should be polished, using the cleaning agent supplied with the unit.
Cleaning of borders and edges
All borders and edges, including the front control panel, should be cleaned in the same manner, and with the same cleaning agent for example, liquid AJAX, as the ceramic surface. Warning! Never use scouring powder, scouring sponges, steel wool, or any other cleaning agent, which can scratch the ceramic surface.
