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 26 (click to view)
Cleaning the hinged grill
This model has been fitted with a hinged grill element to enable you to clean the roof of the oven easily. Before proceeding ensure the oven is cool and is isolated from the electricity supply.
1) Undo the screw which holds the grill in
place (see diagram).
FO 0781
2) Then gently pull the grill downward to allow access to the oven roof (see diagram).
3) Clean the oven roof with a suitable cleaner and wipe dry before replacing the hinged grill element. 4) Gently push up the grill element into place and firmly screw into place the holding nut. Ensure the grill holding nut is firmly in place to avoid the grill falling down when in use
