Charles power distributor has placed power block, such as a fire in a low gear is heated more slowly. As the fan, turntable motor is operating normally, the power control system and transformer normal; measured high voltage diode forward resistance 150kΩ, reverse the resistance infinite, normal. Placed in a glass (glass) of water temperature measured prior 21 ℃, microwave heating block set fire to one minute after removing the cup only measured water temperature 26 ℃, the temperature difference between the normal value should be between 9 ℃ ~ 16 ℃, which should reach about 30 ℃ ~ 36 ℃, to judge low magnetron output power. Richard magnetron Plug rusty, it would be the contact resistance increases, thus reducing the heating power. After removing rust, sand and clean after scraping test machine is working properly, troubleshooting.fThservice manual download site