Sometimes sharing a picture can help us, help you faster! If you have trouble finding the capacitor, check the microwave’s manual or contact a professional repair person to help you. We know ads can be annoying, but they’re what allow us to make all of wikiHow available for free. This image is not<\/b> licensed under the Creative Commons license applied to text content and some other images posted to the wikiHow website. Over time, your microwave may not work as efficiently or it could stop producing heat altogether. Method 1. Unscrew and remove them as well if they prevent you from pulling out the magnetron. 1. Now, we all know this can be done effectively and safely with ohm meter. This image may not be used by other entities without the express written consent of wikiHow, Inc.
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\u00a9 2020 wikiHow, Inc. All rights reserved. There may be other supports or baffles around the magnetron. Always discharge the capacitor with an insulated screwdriver so you avoid getting shocked. Learn more... A magnetron is the main component in your microwave that generates microwave energy and allows you to warm up and cook food quickly. This image is not<\/b> licensed under the Creative Commons license applied to text content and some other images posted to the wikiHow website. Whatever kind of transformer, it is very important to test it in order to know that it operates well. Tape the removed wire lugs to prevent shorts. The short-circuit current is even higher. If you don’t stir the water, you could get an inaccurate reading. These types of transformers 500-100 VA transformers cost hundreds of USD where I live, but these microwave oven transformer… Place a cup of water in the microwave. Transformer Resistance Test Connect an ohmmeter across the two ends of the secondary winding of the transformer and record the resistance. Please help us continue to provide you with our trusted how-to guides and videos for free by whitelisting wikiHow on your ad blocker. This image is not<\/b> licensed under the Creative Commons license applied to text content and some other images posted to the wikiHow website. This image is not<\/b> licensed under the Creative Commons license applied to text content and some other images posted to the wikiHow website. Include your email address to get a message when this question is answered. This test can be applied to both through hole and surface mount capacitors. Polarity Test. Transformer winding resistance measurement is carried out to calculate the I 2 R losses and to calculate winding temperature at the end of a temperature rise test. Keep up-to-date on new changes to the appliance repair industry and new classes that become available. This image may not be used by other entities without the express written consent of wikiHow, Inc.
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\n<\/p><\/div>"}. How to Test a Transformer: 12 Steps (with Pictures) - wikiHow Please consider making a contribution to wikiHow today. Your magnetron still may not work properly even if it has a good filament, so keep testing it. Fill a glass measuring cup with 2 c (470 ml) of water. Amid the current public health and economic crises, when the world is shifting dramatically and we are all learning and adapting to changes in daily life, people need wikiHow more than ever. Your microwave may have multiple magnetrons, so be sure to unwire all of them. You’ll also want to check each terminal to ground. Although you can test the microwave magnetron for bad microwave capacitor symptoms, a microwave oven can give you an … This article was co-authored by our trained team of editors and researchers who validated it for accuracy and comprehensiveness. Fred's Appliance AcademyJanuary 6, 2020VideoLeave a Comment. You might need to disable your pop up blocker to view videos. The primaries have a 3 ohm resistance but the secondaries have about a 1 ohm resistance. This image may not be used by other entities without the express written consent of wikiHow, Inc.
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\u00a9 2020 wikiHow, Inc. All rights reserved. All tip submissions are carefully reviewed before being published. This image may not be used by other entities without the express written consent of wikiHow, Inc.
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\u00a9 2020 wikiHow, Inc. All rights reserved. This article has been viewed 6,038 times. If you get no reading across both terminals, the winding will be open. The best place to find ground is where the mounting holes, where the screws are on the transformer. We will talk about how to fix that later. The part number for the transformer is RTRN-765WRZZ, AP4360086. And we will want to go ahead and set our meter to R times 10 and calibrate. It is carried out as a type test as well as routine test. Attach your amp probe to the line splitter, plug in and run microwave 10-20 seconds. There is power to the HV transformer. If there are no voltage or lower voltage then it suppose to be, the transformer need replacement. If the exterior of the transformer is bulgy or shows any kind of burn marks, don’t test the transformer. You do not need to remove the door or the button panel to access the magnetron. Your primary winding with the thicker wires, your secondary high voltage winding with the thinner wires, and your secondary low voltage winding that is between the primary and secondary windings. It's a good idea to test that your transformer is working before heading out on a long trip. For an easy test, track the temperature change of water when you heat it inside your microwave. But where is the fun in that? Checking to make sure you have no reading. On this part, look for blackened pieces or signs of smoke. I'm not an appliance repair person but this doesn't seem right. The polarity is checked using the flick method (application of direct current) and … That's the type of transformer you started out with. If you get no reading, your winding is open. https://www.manualslib.com/manual/444029/Sharp-R-403kk-T.html?page=14#manual, https://www.microwavespecialties.com/pdfs/E10-2010-06%20Mag%20Test%20Bulletin.pdf, consider supporting our work with a contribution to wikiHow. % of people told us that this article helped them. Filter. In this method, you will first need to unplug the microwave oven from the main power supply and discharge all the high voltage capacitors. This image is not<\/b> licensed under the Creative Commons license applied to text content and some other images posted to the wikiHow website. This image may not be used by other entities without the express written consent of wikiHow, Inc.
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\u00a9 2020 wikiHow, Inc. All rights reserved. To test our last winding, the secondary low voltage, which goes to the magnetron, set your meter back to R times one and calibrate. Avoid using cold water since it could make the test results inaccurate. Latest Reviews Top Load Washing Machines Front Load Washing Machines Electric Dryers Gas Dryers Electric Range Gas Range Single Built In Ovens Double … wikiHow, Inc. is the copyright holder of this image under U.S. and international copyright laws. The capacitor inside your microwave can still contain voltage even after you unplug it. And you have 230v. To test the transformer, start with the primary winding, looking for less than five ohms. Make sure the leads don’t slip or come loose while you’re taking your measurement. If the microwave magnetron is working right, the minimum difference between the initial and ending temperature should be about … This image may not be used by other entities without the express written consent of wikiHow, Inc.
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\u00a9 2020 wikiHow, Inc. All rights reserved. OUTPUT VOLTAGE = INPUT VOLTAGE * (NUMBER OF SECONDARY TURNS) / (NUMBER OF PRIMARY TURNS) Our primary has 100 turns and … This image is not<\/b> licensed under the Creative Commons license applied to text content and some other images posted to the wikiHow website. Microwave Transformer Test Video. The transformer consists of three windings. Method 6 Shorting the Leads of Capacitor (Traditional Method – only for Professionals) The method described here is one of the oldest methods to test a capacitor and check whether it is a good one or a bad one. It doesn’t matter which prong you choose since the measurement will be the same. Fill the PYREX bowl with water at room temperature. 1. wikiHow's. You’ll also want to check each terminal to ground. All; Auction; Buy It Now; Sort: Best Match. Add some spacers (in my case, i used two pieces of metal). First of all, you need to inspect the transformer visually. A winding resistance test of a transformer is carried out as a type test, routine test and also as a field test. Troubleshooting Top Load Washer Front Load Washer Electric Dryer Gas Dryer Electric Range Gas Range Refrigerator Microwave Dishwasher View All. Other Potential Electrical Problems with Your Microwave: ... and then the high-voltage side of your transformer. Add room-temperature water to the cup until it’s level with the 2 cups (470 ml) mark on the side. If you ever reading between ground and one of the terminals, the winding is shorted. wikiHow, Inc. is the copyright holder of this image under U.S. and international copyright laws. Best Match. You need something soft to hit the … Use caution when you grab the glass and be careful not to spill. Your support helps wikiHow to create more in-depth illustrated articles and videos and to share our trusted brand of instructional content with millions of people all over the world. We use cookies to make wikiHow great. Microwave Transformers. wikiHow, Inc. is the copyright holder of this image under U.S. and international copyright laws. Clamp the transformer, open side down, to a surface. In this article I am going to present my struggling about rewinding a microwave oven transformer (MOT) in order to make a low voltage (20-30V) but high current (15-30A) transformer. Don’t touch any wires inside the microwave since they could possibly still have a charge. This image may not be used by other entities without the express written consent of wikiHow, Inc.
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