If there still exist microwave Icakagc, measure near the magnetron with the prób� of the microwave leakagc measure. If the leakage is larger, the oven should be turned off and check whether the four screws which fix the magnetrom have been loosed, if loosed, twist them tightly with socket wrench. If the four screws ar� fixedly, then the magnetron should be take down to check the copper filament weaved washer of the magetron has been placed well or whether the wavc guide housing coupling has been oxidized or have lac�uer on it. If do have, scrape the oxidized layer or the lac�uer off. when fix the magnetron, the copper filament weaved washer must be placed well, the screws must be twist tightly. Then turn on the oven and measure again until it comply with the requirement. If the microwave leakage is larger at those hole position of the window board. the oven should be turned off to inspect whether there ar� crack among them (fig. 5 - 17). If several holes formed a crack , it would enlarge the microwave leakage. If that is the case, it indicates the door has broken, and shouid be replaced with a new door. 2. Means of repair when the oven can heat, but the turntable glass can't move Firstly, check whether the turntable holder is placed correctly. If it is correct, then puli out the power p�ug and take down the turntable combination, measure the resistance value of the turntable motor with R X l K grade of a avometer. If it is open - circuited, it indicates the turntable motor has broken, and should be replaced by a new, same model one. If the resistance valuc is between 15 - 22K, it indicates the turntable motor is normal. then check the connecting shaft weave. If the plastics which the shaft insert in has broken, a new shaft weave should replace it. 3. Repair when the oven can heat, but the lamp is not on. Puli out the powcr p�ug, take down the cabinet and discharge the capacitor. Puli out the two terminal plugs of the lamp. measure the two plugs of the lamp with the R X 100 grade of a avometer. If it is open- circuited, it indicates the lamp has broken, and should be replaced by a same model one.
Fig. 5-16
Fig. 5- 17
4. Means of repair when the oven stop working afrer several minutes operating The phenomcnon indicates the thermal cutout is playing its protective role, and you should check whether the fan is working in normal. Turn off the oven , puli out the power p�ug, take down the cabinet, discharge the capacitor , then turn the fan with hand to see whether it is moving flexibly. If not, it indicates that the oil bearing of the fan motor has run off the oil, and should take down the fan combinatiom to repair the motor. Loosen the two screws which fix the bearing out the shaft and the bearing, and rinse them with kerosene (ATTENTION: The bearing can only be wiped with a silk which moistened with kerosene rather than be washed in the kerosene because there ar� felt on it. If the felt ar� soaked with kerosene, then the engine oil can not be sucked up.). After the bearing being cleaned, the felt should be refuled fu�ly with engine oil (for when the oven is operating, the engine oil empty into the oil bearing slowly). Fix the bearing cover with two screws, turn the fan around till it can move flexibly. Then install them to the oven, and p�ug in the two terminal plugs. If the fan can move flexibly, then the winding of the fan motor should be examined. Measure the winding with R x 100 grade of a avometer, if it is open - circuited, it indicates the winding of the fan motor has broken, and should be replaced by a new, same model one i 5. Means of repairing when press down the door release button, but the door is not opened.
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