how to test a microwave control board

Capacitor C1 is connected … Many times when troubleshooting a Whirlpool-built dishwasher (also sold under the Kenmore and Kitchenaid brands), you'll have a problem that looks like it could be either a bad touchpanel or the control board, but you can't really be sure. That means, like light and radio waves, it doesn’t kick out radioactive particles. We will test your board and give you a price to repair it. Gutting my microwave does not make my bowels trepidate as much as the way you propose to discharge the HV capacitor. How to tell whether the touchpanel or control board is bad in a Whirlpool dishwasher, How to check and replace the main circulation impeller in a Bosch dishwasher, Reading wiring diagrams: How the Defrost Cycle works in a Danby refrigerator, Whirlpool Quiet Partner II normal light blinking, Schematic Exercises to Help You Step Up Your Troubleshooting Game, How to Never Get Tricked by an Open Neutral Again, Identifying Power Supplies on a Samsung Control Board. – a cavity magnetron which converts high-voltage electric energy to microwave radiation – a magnetron control circuit (usually with a microcontroller, an electronic control board or PCB, which stands for “printed circuit board”) – a waveguide (to control the … So you have to do a little battery enhancement to be able to check it in reverse and forward bias. If you're measuring the resistance of resistors, connect one probe to each end of the resistor. it will respond by turning on a Drain Motor for 2 minutes. Learn how your comment data is processed. Did you know that light is also a form of radiation? Source: Whirlpool Quiet Partner II normal light blinking, Sensei Reg and the Samurai say "take that, all you parts-changing monkeys out there!". $449.03 In-Stock. The Samurai shall reveal all these truths unto thee and the Truth shall set thee free. Most of the time, your typical multi-meter isn’t strong enough to properly check the HV rectifier (or “rectumflyer” as we call it in the trade). It fits the Samsung built-in microwave oven. – Or badly damage the contacts Here’s a typical configuration of these switches: And here’s a table of the other major components inside that can go bad and how to check ’em: Just one enhancement to the parts-checking table above. Test the microwave for radiation leakage after servicing. – Or produce internal damage to the capacitor, resulting in further malfunctioning of the said microwave, whose life could end in quite dramatic fashion if the internal insulator between the plates of the capacitor is damaged. ➔If the control is OK (no longer sees shorts with the keypad unplugged). Keep your hands on the plastic potion of the probes so you don't get shocked. Use a damp cloth to wipe down the control panel, dry it and then test again. The control board supplies the touchpad with low voltage signals. Place the control panel in the service position. UPDATE: Whirlpool has finally publicly admitted (kind of) that they’ve left their customers “high and dry” with this control board issue. The new board does away with that and replaces it with solid-state components. Anything that is prepared or has package instructions is an excellent candidate for this test. If your unit is not working then replace the main control board could solve the problem. You can buy a monitor at Radio Shack or a similar electronics store. W10811884 Jenn-Air Microwave Electronic Control. – a magnetron control circuit (usually with a microcontroller, an electronic control board or PCB, which stands for “printed circuit board”) – a cavity magnetron which converts high-voltage electric energy to microwave radiation With the screws removed, open the microwave oven door and then the slide the grill to the left or just lift it right up to remove it. Next remove the control panel mounting screw then lift the control panel up to detach. You can adjust your cookie settings, otherwise we'll assume you're okay to continue. GE Control Boards, Commercial Microwave Ovens, Control Boards Parts, Countertop Microwaves, maury microwave, Lcd Controller Board Hdmi, Emerson Microwaves, amana microwave, Rangemate Microwave … indicates one or more key switch lines are stuck or shorted on either the control or the keypad. The red probe goes to the test point and the black probe goes to ground or common. Run the oven and check all functions. Check your model, find the right part, and compare lowest prices here! In this post, I’ll just go over some of the basics to de-mystify microwave ovens for you. Gird up your loins like a man! W10306616 KitchenAid Microwave Oven Control Panel. This might require minimum microwave repair. Plug in dishwasher or reconnect power. Behold: Awwite, there you be. Transformers convert voltage for use in appliances. Unplug the appliance before installing this part. Do not close the dishwasher door. 4. Examples include: - Normal light keeps blinking but the dishwasher won't run, - none of the lights on the panel work and the dishwasher won't run. It is built around 5V voltage regulator 7805 (IC1), microcontroller (MCU) AT89C52 (IC2), four 12V relays (RL1 through RL4), five pnp transistors (BC557), 14 tactile switches, one 16×2 line LCD (LCD1) and a few discrete components. $53.76 Special Order. The radiation in microwave ovens is what we professionals call “non-ionizing” radiation. Make sure all other connections are made. When the two minutes has elapsed (timer at zero) Transformer X1 reduces voltage to 12 volts. Dragon NaturallySpeaking 12 Home. 5 minute fix - and my otherwise excellent GE Profile microwave was back up and running perfectly. However, this is rarely the case. Touch the multimeter probes to the circuit board test points if you're measuring voltage. Learn appliance repair online from experts at the Master Samurai Tech Academy! To test for the presence of microwave energy within a cavity, place a cup of cold water on the oven turntable, close the door and set the power to HIGH and set the microwave timer for two (2) minutes. Click to play video . Your Maytag microwave has a … You know those plastic hooks on the open end of the door? 2. See page 16 7-4 for removal instructions of the control panel. You just have to be patient enough to let the resistor discharge the capacitor and handle the resistor with the proper insulated pliers, but what’s 5 minutes of your life, just crack a beer. So whaddya gonna do, go live in a dark cave the rest of your life or get a little edumucation from the Samurai? Control boards are often misdiagnosed—check all of the more commonly defective parts. The membrane switch is often attached to the control panel and is usually connected to the electronic control board with a flat ribbon style connector. Well, they go into slots on the cabinet and jiggle some little switches called interlock switches. To learn more about your microwave oven, or to order parts. MISSION STATEMENT: We strive to provide affordable component-level repair of microwave oven displays, control panels, and circuit boards (ideally within 2-3 weeks, but of course subject to workload backlogs and part order delays) with the aim of correcting and preventing … Samsung DE94-02001C Assembly Control Panel. We won’t get into that here but if you need help with your specfic model, just start a new topic in the Kitchen appliance forum at the Samurai School of Appliantology and we’ll hepya there. Unplug dishwasher or disconnect power. This self-test is usually accessed by pressing a couple of keys on the touch pad. High-voltage or "step-up" transformers turn lower voltages into higher intensities. It may because of its touch pad or control panel that are defective or has been damage or it may have defective in its main control board. Turn on the oven. The Defrost Board is located in the control cabinet and actually looks like it was designed to use a conventional control because of the screws that hold the board in place. After you get the control panel open, there’s just one other safety thing to do before you start sticking your paws all in there: discharge the high voltage capacitor. WB27X10791 GE Microwave Main Control Board. Now, don’t the let the word “radiation” make you all a-sceered and quivery. Here is a service manual for the jenn-air microwave hood combos, that shows how to remove the control panel. Open console and disconnect the keypad ribbon connection from the control (at P1). Appliances like microwaves make use of high-voltage transformers. Although you may have done this successfully numerous times in the past, I would respectfully recommend that you replace the said procedure with a discharge through a suitable HV resistor to prevent all of the above on top of the big spark, and that for your own future well-being you stop doing that yourself. Powered by Invision Community. Could take on lots of other variations but the thing they'll all have in common is that dishwasher won't run. – a cooking chamber. Remove the kickpanels below the door and you'll find a tech sheet in a plastic pouch (unless some sleaze bag stole it). As an electrical engineer, I feel deeply trepidated to bring to your attention that the capacitor may hold enough charge to maybe: I know, most DIY repairmen do not have such a resistor, but it is still IMO a better proposition than the screwdriver. Basically, the oven control board should be back where it should be, except there is no ribbon linking it with the touchpad. Feeling better already? Don’t start freaking out on me, all’s you gotta do is short the terminals together like ahso. You Talk, Dragon Types. indicates one or more key switch lines are stuck or shorted on either the control or the keypad. Have you been told you need a new control board in your appliance? The conundrum you face is which part to replace: the touchpanel or the control board? Now offering on site control board repairs! The circuit diagram of the microwave oven is shown in Fig. 4. The HV capacitor can hold up to 2,000 volts which can really curl your hair. This is not a joke: let’s say a 2000uF capacitor still measures 2kV, that’s 4 coulombs of charge, which, when discharged within, say, 10 ms, a conservative estimate, still yields 400 A of current, not to be messed with. Learn how to troubleshoot like a Master Samurai Tech... MASTER SAMURAI TECH Because high-voltage capacitors in a microwave can retain a lethal electrical charge even when the microwave is unplugged, a service technician should install this part. how to test oven control board, Oven control board 316455430 is an original equipment manufacturer (OEM) part that fits some Kenmore 790-series gas ranges. – a high voltage power source, commonly a simple transformer or an electronic power converter, which passes energy to the magnetron lg microwave oven control panel with pc board and touch pad (silver) 3 times faster than typing! If you have determined that all of the other components are working properly,replace the main control board. If you have determined that all of th... e other components are working properly,replace the main control board. Note the orientation of the wires attached to the electronic control board. For example, if the item should be cooked for five minutes for … Electronic control board 00771183 manages various microwave functions such as heating, lighting and turntable operation. How to test the components in a microwave oven. It the capacitor is holding charge, it can snap like a fire cracker and make a cool-looking flash-bang so… heads up! The main control board might be defective. To determine if the control or keypad is faulty, do the following test: 1. Cook the food according to the instructions on the package. 3. 30-Day Money Back Guarantee. This site uses Akismet to reduce spam. Awwite, with that bit of funness outta the way, we can proceed to the meatus of this troubleshooting membrane. Check the manual for any self-test … W10403039 Whirlpool Microwave Main Control Board. Control boards are often misdiagnosed—check all of the more commonly defective parts. then the drain motor will NOT respond and will remain off. – a waveguide (to control the direction of the microwaves) You can usually test things like keys, switches controller etc. The light bulb is not turning on July 8, 2013. A more realistic estimate would be to consider that the 2kV will discharge through the internal resistance of the capacitor plus that of the screwdriver, which will be at most half an ohm, producing an instantaneous initial discharge current of 4000 A. Microwave ovens should not be run empty. This part replaces the following: 318010102 Because they pose a risk of shock, the transformer must be … , e l 2. Free shipping for many products! Unplug dishwasher or disconnect power. I uploaded it to my google drive for you to download. California 19410 Business Ctr Dr. Northridge, CA 91324 1-877-477-7278 Tennessee 240 Edwards St. S. E. Cleveland, TN 37311 1-877-477-7278 Almost all microwave ovens have a control compartment that you access in various ways. Search the vast repository of wisdom at Fixitnow.com: Here’s a generic troubleshooting table that applies to almost all microwave ovens in current use: One of the most common things to test (‘cuz they go bad a lot) are the door interlock switches. Zfitei Microwave plate cover . Faced with their first microwave oven repair, the bowels of many Grasshoppers begin to quake uncontrollably with trepidation. Diodes D1 and D2 act as rectifier diodes. To remove the PCB: 1. Samsung Microwave Control Board DE92-02136A Page 35: Microwave Key Panel Test This item Samsung DE92-02434B Microwave Control Board. Videos for related products. The original design board had a transformer which burned out. This oven control board includes the digital clock but doesn't include the overlay that marks the control buttons. Therein it is written this simple procedure for determining whether the touchpanel or control board is the culprit: A rapidly blinking LED over one of the keys of the keypad (or sometimes a “dead” keypad/console). This is a new GENUINE appliance replacement part, Samsung Microwave Control Board DE92-02136A. (Caution: The microwave oven can store thousands of volts of electricity in its high voltage capacitor, even after the microwave oven has been unplugged. Well, you just relax, Grasshopper, and clean out those skivvies ‘cuz once you know a few tricks, you’ll see that microwave ovens are no more complicated than any other appliance. Find many great new & used options and get the best deals for WB27X11215 Microwave Control Board at the best online prices at eBay! Some microwave ovens have a self-test feature. 0:47 . ... Microwave Thermostat and Fuse Continuity Test . They published this Class Code 91 Letter (though they never actually explain what “class code 91” means and Google wasn’t any help) with a list of all the model numbers that use the control board discussed in this article… and there are a lot. Check and/or replace the keypad if the control responds OK. ➔If the control is not OK (still sees shorts with the keypad unplugged). Put the oven control board back together and return it to its original position. You can test your microwave oven with food. The circuit is powered with 230V AC. Check the connection first and if it appears okay, then you can test the membrane switch for continuity with a multi-meter. Is there anyway to force a defrost? So it’s a complete misnomer to refer to microwaving food as “nuking” because it has nothing in common with nuclear radiation. No need to pay for a new control board. $136.40 Special Order. When you press a button on your microwave touchpad, the control board sends a signal to the other microwave components to begin heating. – Produce a current high enough to weld the screwdriver to one or both the contact, depending on materials involved. – Or worse, produce enough sudden internal heat inside the capacitor to boil the electrolyte (if any) which may in turn cause the capacitor to violently discharge its guts in, say, your eye. Please open your Appliantology hymnal and sing along with me now. Videos for related products. Electronic control board WB27X10866 manages various microwave functions, such as heating, lighting and turntable operation. Leave the oven alone for about an hour. 5. Put console back together. 8.14) Microwave oven test-mode (From Mark Paladino (paladino@frontiernet.net)). Good, let’s continue with our hymnal. Supplying Demand. Oven control board 316455430 monitors the temperature and controls the oven heat. If you need more hand-holding, come start a new topic in the Samurai Appliance Repair Forums. $183.58 Special Order. We are here to help! Or that your control board is no longer available? How to Test the Major Components in a Microwave Oven, Fixitnow.com Samurai Appliance Repair Man, Troubleshooting Flow Chart for a Gas Dryer with No Heat, http://search.digikey.com/scripts/DkSearch/dksus.dll?Detail&name=100KBJCT-ND. The buttons of microwave are not working; An indication that your microwave is not working is that its button is not functional. When you’re ready to disassemble the microwave oven and do some troubleshooting, you’ll begin the same way you would for any other appliance: UNPLUG IT! Because high-voltage capacitors in a microwave can retain a lethal electrical charge even when the microwave is unplugged, a service technician should install this part. To determine if the control or keypad is faulty, do the following test: 1. ZFITEI. If you don’t own one resistor yourself, you can order a pack of 10 here http://search.digikey.com/scripts/DkSearch/dksus.dll?Detail&name=100KBJCT-ND . Page 34: Microwave Power Control Board (Pcb) Microwave Power Control Board (PCB) The PCB is mounted to the control panel and can be accessed by placing the control panel in the service position. I had a fridge today, ED2VHEXTB01 4 years old, coil was frozen, thawed it manually with a heat gun then applied 115 to the Heater directly, and the heater works. We have placed cookies on your device to help make this website better. Experience says that it's almost always the touchpanel that goes bad in these cases-- a keypad gets stuck closed or worn on the inside so it no longer makes contact. Fortunately, there's a way to tell for sure without any guesswork! For continuity with a multi-meter means, like light and Radio waves, it doesn ’ start! Samurai Tech Academy to help make this website better page 16 7-4 for removal instructions of the door sees! The more commonly defective parts Radio Shack or a similar electronics store your is! Remove the control is OK ( no longer available almost all microwave ovens for.... Curl your hair things like keys, switches controller etc do not have such a resistor, it... Stuck or shorted on either the control or the control panel mounting screw then lift the control panel repair the! That your control board DE92-02136A and disconnect the keypad a price to repair it oven heat of are! Holding charge, it can snap like a Master Samurai Tech Powered Invision. The plastic potion of the microwave oven, or to order parts much as the way, we proceed. Working ; An indication that your microwave is not functional point and the black probe goes to the test and. Is usually accessed by pressing a couple of keys on the touch pad signal to the circuit diagram the. Touch the multimeter probes to the circuit board test points if you 're measuring the resistance resistors! Should be, except there is no ribbon linking it with the keypad ribbon from... @ frontiernet.net ) ) and the Truth shall set thee free on the open end of the more defective! The open end of the other microwave components to begin heating, replace the main control board 316455430 the... Ge Profile microwave was back up and running perfectly ’ s you got ta do is short the together! Doesn ’ t how to test a microwave control board out radioactive particles marks the control buttons Radio waves it! Samurai Tech Powered by Invision Community like light and Radio waves, it doesn ’ t kick out radioactive.! On your microwave is not functional oven control board, replace the main control board supplies the.. Faulty, do the following test: 1 you 're measuring the resistance of resistors, connect one probe each... I know, most DIY repairmen do not have such a resistor, but is... So you have determined that all of th... e other components are working properly, replace the control. In your appliance more hand-holding, come start a new topic in the Samurai repair! A resistor, but it is still IMO a better proposition than screwdriver... Of resistors, connect one probe to each end of the microwave oven is shown Fig... Connect one probe to each end of the other microwave components to begin heating all! All of th... e other components are working properly, replace the main board! C1 is connected … Put the oven control board start a new topic in the Samurai appliance Forums. Will remain off heating, lighting and turntable operation connection from the control mounting! It with the keypad ribbon connection from the control board have in common is that its button not... Common is that dishwasher wo n't run can hold up to 2,000 volts which really. Check the manual for the jenn-air microwave hood combos, that shows how to troubleshoot like a Samurai! Mark Paladino ( Paladino @ frontiernet.net ) ) t start freaking out on me, all s... That and replaces it with solid-state components a monitor at Radio Shack or similar. Probes so you have determined that all of the resistor, otherwise we 'll assume you 're measuring resistance! This post, i ’ ll just go over some of the other components are working properly, replace main... Hand-Holding, come start a new control board 00771183 manages various microwave functions such as heating lighting... To download components are working properly, replace the main control board in your?... The black probe goes to ground or common order parts and replaces it with solid-state components with me now to! Board back together and return it to my google drive for you to download voltage signals probe to end... But it is still IMO a better proposition than the screwdriver if the control at... As much as the way you propose to discharge the HV capacitor and controls oven... N'T include the overlay that marks the control panel on either the control sends! On a Drain Motor will not respond and will remain off let ’ s continue with hymnal. Cabinet and jiggle some little switches called interlock switches be back where it should be where. Capacitor C1 is connected … Put the oven control board back together and return it to original! The main control board includes the digital clock but does n't include the overlay that the! Determined that all of th... e other components are working properly, the! On your device to help make this website better, like light and waves... And compare lowest prices here Drain Motor for 2 minutes ” radiation that means, light! Signal to the other components are working properly, replace the main control DE92-02136A. You can adjust your cookie settings, otherwise we 'll assume you 're measuring voltage touch pad t freaking. Back together and return it to my google drive for you to download electronics... Cool-Looking flash-bang so… heads up determine if the control buttons sees shorts with touchpad... It with solid-state components it with solid-state components test your board and give you a to... Next remove the control panel mounting screw then lift the control panel together and return it to my drive...: the touchpanel or the keypad probe to each end of the attached! Hold up to detach have determined that all of th... e other components are working,... Most DIY repairmen do not have such a resistor, but it is still IMO a proposition. Return it to its original position self-test is usually accessed by pressing couple! T the let the word “ radiation ” make you all a-sceered and quivery remove! Oven is shown in Fig be able to check it in reverse and forward.... Misdiagnosed—Check all of the more commonly defective parts like a Master Samurai...! Electronic control board should be cooked for five minutes for … the control board solve... Wo n't run some little switches called interlock switches repair it start a new GENUINE appliance replacement part, microwave. ( from Mark Paladino ( Paladino @ frontiernet.net ) ) touchpad with low voltage signals usually! Open end of the wires attached to the electronic control board orientation of the wires to... 'S a way to tell for sure without any guesswork these truths unto thee and the Truth set! A Master Samurai Tech... Master Samurai Tech... Master Samurai Tech Academy have determined all! Board supplies the touchpad that you access in various ways Key panel test electronic control supplies... Cookie settings, otherwise we 'll assume you 're okay to continue hood combos, that shows how remove. Samurai appliance repair online from experts at the Master Samurai Tech Powered by Invision Community Shack or similar! Way you propose to discharge the HV capacitor or the keypad troubleshooting membrane working properly replace! More commonly defective parts you know that light is also a form of radiation buttons of are... And the black probe goes to ground or common check it in reverse and forward bias multi-meter! Oven, or to order parts and turntable operation now, don ’ t start freaking out me... To learn more about your microwave oven, or to order parts not working is that its button not!, that shows how to troubleshoot like a Master Samurai Tech Academy the black probe goes ground! Five minutes for … the control ( at P1 ) turning on a Drain Motor will respond. Other microwave components to begin heating much as the way, we can to. For 2 minutes let ’ s continue with our hymnal by Invision.!, like light and Radio waves, it can snap like a fire cracker and a. Button is not working then replace the main control board WB27X10866 manages various microwave functions, such as heating lighting... Know those plastic hooks on the cabinet and jiggle some little switches interlock! Cracker and make a cool-looking flash-bang so… heads up unplugged ) of other variations but the thing they 'll have... More about your microwave touchpad, the oven control board food according to the test point and black! For five minutes for … the control is OK ( no longer sees shorts the! Powered by Invision Community wires attached to the electronic control board keys on the cabinet jiggle. What we professionals call “ non-ionizing ” radiation for a new topic in the Samurai appliance Forums! Like keys, switches controller etc more commonly defective parts the new board does away with that replaces!, most DIY repairmen do not have such a resistor, but it is still a!, don ’ t kick out radioactive particles resistance of resistors, connect one to. And give you a price to repair it switches called interlock switches n't! Microwave touchpad, the bowels of many Grasshoppers begin to quake uncontrollably with trepidation way we. In reverse and forward bias a similar electronics store first and if it appears okay, then you buy. Forward bias radiation ” make you all a-sceered and quivery oven test-mode ( from Mark Paladino ( Paladino @ )... Shall set thee free the following test: 1 of th... e other components working. Self-Test is usually accessed by pressing a couple of keys on the package does make! Keypad is faulty, do the following test: 1 8.14 ) microwave oven test-mode ( Mark! The resistor 7-4 for removal instructions of the resistor replaces the following test: 1 told need...

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