After power and cooling fan trays rotate properly. The front panel display and operation of each function properly.NhKservice manual download site

    Measured resistance is 280Ω high voltage across the capacitor is not normal (normal multimeter R × 10 block measurements should be infinite). After the high-voltage capacitors and high voltage rectifier diode lead unplugged, not the problems found were measured. After the microwave magnetron filament leads plugged in, and then measuring the high voltage across the capacitor resistance back to normal. Measuring microwave magnetron filament pin to ground resistance is 150Ω (normal should be infinite). This shows that the microwave tube filament is shorted to ground leakage, replacement troubleshooting microwave magnetron.NhKservice manual download site