Insufficient heating , also known as slow heating , refers microwave compared with the normal use of the same block of cooking the same food firepower , but when cooked and more obvious than the normal time , and even make some cooked foods requiring high firepower can not be completed properly cooking . This failure is reduced microwave power output performance. Under normal circumstances the mains power supply , the main reason for this failure is aging or magnetron magnetron filament or anode supply voltage is too low.hmiservice manual download site

    Magnetron aging two, first, because the use of long term and natural aging. Typically magnetron design life of 2000 hours , an average of 30 minutes microwave terms of dollars every day , life is 4000 days , or about 11 years , but even this deadline , the magnetron output power is not immediately obvious weakened, while is gradually aging, it is generally less likely to encounter the natural aging of the magnetron. Another is the failure, the main cause of this failure is the magnetron itself is of poor quality or over the longer-term work in harsh environments , such cases are usually rare. So maintenance is usually insufficient heating failure to check the magnetron filament or anode supply voltage ( check the power supply circuit and connector ends when power ) , the focus of attention to the contact between the connection ends of the magnetron filament pin , particularly prolonged use of a microwave oven is easier to poor contact failure. Open this microwave cabinet can often be found in many places in the magnetron and the chassis and other components are integrated with more grease and dust , check the magnetron filament pin and patch pieces can often be found pins by erosion and oil green dirt layer, if the filament connecting pin connector loose , the contact resistance will be significantly increased, the filament voltage is too low , so obviously microwave output power is reduced . When repair this failure , as long as the filament pin detergent , then wipe the alcohol swab , then use needle-nose pliers to flat pin plug some of the film holder to insert the pin in good contact with the filament on the line .

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