TurboChef Technologies Residential Single and Double Wall Oven - Manual (Page 54)

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