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 you for your manual It has the basic things to and i use the Oszi for Longer Time.
THX
Text excerpt from page 42 (click to view)
Problemer Pladerne er rustne..........................
Afhjælpning Hvis komfuret anvendes sjældent, f.eks i et sommerhus er det vigtigt at rustbehandle pladerne regelmæssigt. Hvis der anvendes kogepladeskjulere, må de ikke anvendes på en snavset eller fugtig plade, da det øger risikoen for rust.