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 6 (click to view)
Leveling
it
Right to raise; Ml to lower
r0lh
Your refrigerator has 2 leveling screws-one on the right and one on the left. To adjust one or both of these, follow the directions below. 1. Remove base grille. (See page 14.) 2. To raise front, turn screw clockwise. 3. To lower front, turn screw counterclockwise. 4. Check with level. 5. Replace base grille. (See page 14.)