Haier HR-6752D Service Manual page 15

230 50Hz
1. After the oven start working, a 230V AC voltage is added between the two ends of the
high-voltage transformer.
2. The 230V voltage will make 2000V induction voltage between the two ends of the
high-voltage coil, and 3.5V low-voltage between the two ends of the heater winding.
3. The 2000V voltage will be doubled by the high-voltage capacitor, then be rectified by
the high-voltage diode, finally become a 4000V negative high-voltage to ground at the
FA end of the magnetron.
4. One end of the heater coil is connected to the negative high-voltage, the other end to
the F end of the magnetron. Therefore the working condition of the magnetron is made
up: low-voltage and high electric potential.
HVC
AK
HVT
Rectifier
HVD
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Circuit Diagram and Circuit Explanation
Magnetron