In Countertop Microwave: Usually It is mounted on top of the microwave shell near the magnetron Over the range Microwaves: Usually it is screwed directly to the magnetron. TEST 2: Set your ohmmeter to its highest resistance scale. To test for the weak magnetron, connect one magnetron at a time and repeat Steps 1-4. a. Sometimes we are confronted with the fact that it takes longer to heat up the dishes than usual. For ovens that contain 2 magnetrons (NE1257R, NE1258R, NE1757R, NE2157R), the temperature rise should be approximately 70o F per magnetron. Often the reason for this behavior of the microwave … Touch the other probe to the metal magnetron housing. To test the magnetron RF power requires very specialized test equipment but it sounds like you are trying to repair a microwave oven. Then use gator clips to put the diode in a series circuit with the battery to test … glass measuring bowl) with 1qt. How to check the magnetron in the microwave . Take special caution to not touch the two probes together. If the diode is burned out, the magnetron will not receive enough voltage to operate and the microwave oven will fail to heat. Attach your amp probe to the line splitter, plug in and run microwave 10-20 seconds. Before you replace the diode with a new one, you should … b.For ovens that contain 4 magnetrons (NE2180, NE3280), the temperature rise should be approximately 35o F per magnetron. By attaching the ohmmeter, the continuity of the resistance should be infinity. This test should produce a reading of infinity - indicating … The RF testing kit would cost about as much as 500 new ovens so unless you are doing this as a business I would stop right now! 3-9 amps = transformer is good. Place a cup of water in the microwave. In the case with many GE microwaves, the magnetron can test good according to the filament resistance specifications yet fail when you're actually trying to get the damn thing to heat up … 10-14amps = all is good. Before testing, you need to unplug the power terminal of the microwave oven. The Procedure for Testing the Diode, or Rectifier, of Your Magnetron: Get a nine-volt battery and insert the readers of your voltmeter as a standard. This high voltage powers the magnetron to heat the food or beverage placed in the oven cavity. The water must be 59-75 degrees Fahrenheit (15-24 degrees Celsius). BE SURE TO UNPLUG MICROWAVE AND DISCHARGE CAPACITOR BEFORE WORKING ON ANY ELECTRICAL COMPONENT. Sometimes, when you're troubleshooting a microwave, it can be tricky to tell whether or not the magnetron tube is bad. Touch one of the meter's probes to a magnetron terminal. Unfortunately, every technology has its own life, and microwaves are no exception. Follow the below steps to test the performance of your microwave: Place a glass bowl (preferably a 2qt. How to test a microwave diode. To test the thermal fuse control the magnetron, please disconnect one of the terminals of the fuse and check it for continuity with a multimeter. Using a multimeter to test magnetrons without powering them up is pretty straightforward.Note: I've read everyone's comments … The magnetron is more likely to fail than the capacitor. Problem is in HV circuit. This test is to check between the terminals of the magnetrons with an ohmmeter. This amperage test is quick, easy, accurate and safe. of water in the center of the microwave cavity. And sometimes the device works fine, but the food remains cold. This could result in an inaccurate reading. Microwave Performance Test.

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