The machine uses more than three years , failure : no bright lights when working , can not heat food when not lit , although sometimes bright , but the turntable, timer knob does not rotate . Beat about when faulty microwave or oven door closed once again be able to work .Wqbservice manual download site

First, check the micro switchWqbservice manual download site

    There are two hooks on Yan Hua E70TF3 type microwave oven door , and a ram , controls the three micro-switches ( see Figure 1 s1, S2, S3) for "on " and "off " conversion . Micro switch failure may be bad or gap changes, so that the door is not in place causing ejector hooks eight .Wqbservice manual download site
 Wqbservice manual download site

Micro switch has three inserts, consisting of a pair of normally closed contacts (com-co) and a pair of normally open contacts (com-no), as shown in Figure 2 . When the door opened, struck with a screwdriver on the activity sheet plastic holder with three block measuring ohm micro switch -off , the result of good contacts conversion . It should adjust the gap : Loosen the two screws plastic shelves , use the plastic screw clearance rack up , raise the door direction, and then fixed tight. Then shut the door several times to check the light does not work phenomenon excluded.Wqbservice manual download site

Second, check the timer and power regulatorWqbservice manual download site

     Using an ohmmeter, measure the figure of 1,2 l Contact : timer knob in the " 0 " bit should be blocked, leaving the "0" bit should be turned on.Wqbservice manual download site

With an ohm meter to measure the power regulator 4,5 contacts: power adjustment knob in the " fire " should pass .Wqbservice manual download site

Barrier through the actual measurement of 1,2 and 4,5 when two contacts . Description poor contact , the need to break down maintenance.Wqbservice manual download site

Third, overhaulWqbservice manual download site

    Before dismounting , first timer knob on the " 0 " bit , the power regulator knob on the " fire " position , enabling analysis and assembly restored. Timer and power regulator mounted on a box , shown in Figure 3 . When you open the plastic cover , a thin cover on the gear box to avoid falling . Two pairs of contacts box filled with coke sparking caused serious bad . With fine sandpaper No. 500 contacts , then after alcohol swab to clean , good contact , fault elimination .

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