Turbo Chef Technologies Residential Single and Double Wall Oven service manual Microwave System

5.6OVEN SYSTEMS

10.	Close the door.	Doubler Circuit, Voltage
11.	Ensure the door opens and closes freely.	The microwave system consists of a magnetron and
12.	Push the oven back into its original position.	voltage doubler circuit. The voltage doubler circuit
		consists of a special step-up transformer, a capacitor,
		and a diode. Two separate transformers are
Halogen Bulb Replacement		incorporated; one is the 1-10 step-up, multiplying
		the incoming voltage by 10, the other is the
	CAUTION: DO NOT touch the bulb with	filament transformer that supplies approximately
bare fingers; rather, use gloves, cloth, or tissue		3.5 VAC to the magnetron filaments to warm them
when handling the bulb. If the bulb is accidentally		before the 4000+ volts are applied. This function
touched, clean it with isopropyl alcohol before		extends the life of the components. The oven uses
applying power.		two magnetrons, each magnetron circuit is separate
	CAUTION: To avoid burns, ensure the oven	and independent.
cavity has had adequate time to cool before		High-Voltage Capacitors
performing the below procedure.
		The high-voltage capacitor works in combination
To replace a bulb in the lower oven (use RWD-
		with the diode to effectively double the already-high
3016),		voltage from the secondary (output) winding of the
1.	Gently pry the halogen light cover from the	transformer. The capacitor is used to store the power
	oven cavity wall using a flat-surfaced object. Be	during the positive to negative swing of the
	careful to not damage the porcelain coating on	incoming AC voltage. When the oven is connected
	the oven cavity wall.	to power, the capacitor will still have 2000+ volts
2.	Remove the bulb by gently pulling it out of the	setting on the terminals. During magnetron
		operation, the potential is 4000+ volts.
	socket.
3.	Install the new bulb.	High-Voltage Diode

4Reinstall the cover, ensuring that it snaps into place.

Microwave System

This section contains information about the following components:

-Doubler circuit, voltage

-High-voltage capacitors

-High-voltage diodes

-High-voltage transformers

-Magnetrons

-Stirrer motor and assembly

-Waveguides

For information on accessing and removing parts, see the Appendix.

The high-voltage diode works in combination with the high-voltage capacitor to effectively double the 2000+ volts output voltage from the high-voltage transformer. During magnetron operation, the potential is 4000+ volts. This high voltage allows the magnetron to produce the microwave energy.

The high-voltage diode is assembled by connecting several 1000-1500 volt semiconductor diodes in a series to increase the reverse voltage capability. In the circuit, the high-voltage diode conducts to prevent the filament voltage from becoming positive, thus as the high-voltage winding of the transformer goes to 2400, the high-voltage capacitor is charged to 2000+ volts.