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 33 (click to view)
The grill element can be folded down to make it easier to clean the oven ceiling. Folding down the grill element
Warning: The grill must only be folded down when the oven has been switched off and there is no risk of being burnt. 0 1. Remove the shelf support rails. 2. Grip the heating element at the front and pull it forwards and out over the support lug on the inner wall of the oven. 3. The heating element will now fold down.
Important: Do not use force to press the heating element down! The heating element might break. Cleaning the oven ceiling
Repositioning the grill element 0 1. Move the heating element back up until it is again positioned directly beneath the oven ceiling. 2. Pull the heating element forwards against the spring pressure and guide it over the oven support lug. 3. Settle it onto the support. 4. Insert shelf support rails.
Important: The heating element must be positioned correctly and securely above the support lug on the inner wall of the oven.