1 Safety Interlock System. 2 Door Viewing Screen - Allows viewing of food. The screen is designed so that light can pass through, but not the microwave. 3 Door Hook - When door is closed, it will automatically shut off. If the door is opened while the oven is operating, magnetron will immediately stop operating. 4 Oven Cavity. 5 Door Seal - Door seal maintains the microwave energy within the oven cavity and prevents microwave leakage. 6 Glass Cooking Tray - Made of special heat resistant glass. Food in a proper receptacle is placed on this tray for cooking. 7 Roller guide - This must always be used for cooking together with the glass cooking tray. 8 Coupler - This fits over the shaft in the center of the oven's cavity floor. This is to remain in the oven for all cooking. 9 Knob V.P.C - Used to select a microwave power level. 0 Knob timer - Used in setting cooking time for all functions. q Door Release Button - By pushing this button the latch system cuts off all circuits and stops the oven before the door is opened.