The owner's manual/operating instructions that I purchased was the original factory document and it was in at least three and maybe more languages. I no longer have it because I sold the tape recorder and included the owner's manual/operating instructions and a service/repair manual that I bought on ebay for the new owner.
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.
Great price, Quick delivery, the document was very usefull A+++++++++++++++
Text excerpt from page 39 (click to view)
Oven Ceiling
The upper heating element can be folded down to make it easier to clean the oven ceiling.
Folding down the heating element
1 Warning: Only fold down the heating element
1 Caution: Do not use force to press the heating
element down! The heating element might break.
when the oven is switched off and there is no risk of being burnt! 1. Remove the side 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.
Cleaning the oven ceiling
Repositioning the heating element
1. Move the heating element back up towards 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 rail.
1 Important: The heating element must be posi-
tioned correctly and securely on both sides above the support lug on the inner wall of the oven (2).