Analysis of the reasons for the high voltage circuit may malfunction or failure caused no microwave magnetron output.GBeservice manual download site
     Open the casing inspection, found high pressure fuse has blown. According to the machine circuit diagram (see photo) analysis, high pressure fuse, indicating that high pressure current overload, possible causes breakdown voltage capacitor C, high voltage breakdown or magnetron diode D breakdown. Check the high voltage diode is normal, then check the high voltage capacitor C, the breakdown has been found, replace the test machine, troubleshooting.GBeservice manual download site