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 11 (click to view)
Cleaning and caring for your range
CONTROL PANEL AND KNOBS SURFACEUNIISAND REFLECTOR BOWLS
REMOVING
I.
First make sure lower oven and surface unit control knobs are set on OFF. All knobs pull straight off. Surface unit knobs have 1. Be sure surface units are OFF and COOL.
2. 2. Use warm soapy water and a soft cloth to wipe the panel. Rinse and wipe dry.
Lift the edge of the unit opposite the receptacle just enough to clearthe reflector bowl.
3.
Wash knobs and surface unit collars warm soapy water. R:nse well and dry.
In receptacle.
4.
Push knobs straight back on. Make sure they point to OFF. Make sure the collar and spring on surface unit knobs are put together as shown