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)
HINTS AND TIPS
Use the top oven when you want to warm plates. Use the lowest setting on the top oven temperature control. There should always be at least 2.5cm (1â) between the top of the food and the grill element. This gives best cooking results and allows room for rise in yeast mixtures, Yorkshire puddings etc. When cooking cakes, pastry, scones bread etc., place the tins or baking trays centrally on the shelf. Ensure that food is placed centrally on the shelf and there is sufficient room around the baking tray or dish to allow for maximum circulation. Where a degree of evenness in baking is required, it may be necessary to interchange food during cooking. Where a larger quantity of food is to be cooked we recommend you use the main oven. Place dishes on a suitably sized baking tray on the shelf to prevent spillage onto the oven base and to help reduce cleaning. The material and finish of the baking tray and dishes used will affect the degree of base browning of the food. Enamelware, dark, heavy or non-stick utensils increase base browning. Shiny aluminium or polished steel trays reflect the heat away and give less base browning. Do not use the grill pan as a baking tray as this will increase base browning of the food. Do not place baking trays directly on the oven base as it interferes with the oven air circulation and can lead to base burning; use the lower shelf position. Because of the smaller cooking space and lower temperatures, shorter cooking times are sometimes required. Be guided by the recommendations in the cooking chart. For economy leave the door open for the shortest possible time, particularly when placing food into a pre-heated oven.