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 14 (click to view)
THE TOP OVEN
USES OF THE TOP OVEN
The top oven is the smaller of the two ovens. It is heated by elements in the top and bottom of the oven. It is designed for cooking smaller quantities of food. It gives especially good results if used to cook fruit cakes, sweet or savoury flans or quiche. The top oven is also ideal for use as a warming compartment to warm dishes and keep food hot. Use the lowest setting on the top oven temperature control.
HOW TO USE THE TOP OVEN
Turn the Top Oven/Grill Selector to Top Oven. Turn the Top Oven temperature control to the required setting.
THINGS TO NOTE
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The indicator neon will glow. It may turn ON and OFF during use to show that the setting is being maintained. The cooling fan for the controls will operate. The oven light will come on.
Do not place dishes, tins and trays directly on the oven base as it becomes very hot and damage may occur.
TO FIT THE TOP OVEN SHELF
The shelf should be fitted with the straight rods uppermost on the frame and the forms towards the back of the oven. If not fitted correctly the anti-tilt and safety stop mechanism will be affected.