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.
Text excerpt from page 7 (click to view)
To clean the cabinet Use a soft cloth lightly moistened with mild detergent solution. Do not use strong solvents such as alcohol, benzine or thinner. To clean the heads and tape paths After every 10 hours of use, clean the heads 0 and 0, the pinchroller 0 and capstan ~. Use a cotton swab ~ slightly moistened with cleaning fluid or denatured alcohol.
To clean the lens Use a cotton swab slightly moistened with cleaning fluid. Wipe gently from the center to the edge. Lens