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    • Samurai Appliance Repair Man

      Webinar Recordings Index Page   10/03/2017

      On-demand appliance repair training videos for Professional Appliantologist members Over 30 hours (and growing!) of original, high quality appliance training webinars developed and given by yours truly are at your fingertips, on topics you won't find anywhere else. Fill in those knowledge gaps, strengthen those areas of uncertainty, and boost your skills. Watch on mobile or desktop at your convenience whenever, wherever.  Ultra Short Primer on Basic Electricity, Circuits, Ohm's Law, and Schematic Reading (Length: 1:04:48) Basic Refrigerator Troubleshooting (Length: 1:10:45) Schematic Reading Workshop, 10/2015 (Length 1:19:08) Troubleshooting Strategies for Computer-Controlled Appliances (Length: 48:34) Semiconductors and PN Junctions (Length: 1:04:37) Appliance Temperature Sensing Devices & Technology (Length: 1:27:33) Voltage Measurements, Meters, Ghost Voltages, and Triac-controlled Neutrals (Length: 1:29:32) Troubleshooting with Tech Sheets, Part 1, 4/2016 (Length: 1:09:26) Troubleshooting with Tech Sheets, Part 2, 4/2016 (Length: 1:21:11) Tech Sheet Review, 4/9/2016: Bosch Speed Cooker, Amana Refrigerator, GE Glass Cooktop Range (Length: 1:22:58) Pulse Width Modulated (PWM) Switches used in Samsung Switched Mode Power Supplies (SMPS) (Length: 27:07) PWM Computer Cooling Fan in a Whirlpool Refrigerator (Length: 14:53) Understanding AC Split-phase Household Power Supplies (Length: 52:41) Troubleshooting a Samsung Electric Dryer without Disassembly using Live Tests and the Schematic (Length: 22:47) Troubleshooting a Bosch Dishwasher No-Heat Problem using the Schematic and Live Tests (Length: 15:38) Linear Motors and Linear Compressors (Length: 55:54) Bi-directional PSC Drive Motor Systems in Whirlpool VM Washers (Length: 56:52) Appliance Service Call Structure and Troubleshooting Strategies (Length: 1:00:16) The Ten Step Troubleshooting Tango and Workshop Exercises (Length: 1:35:39) Troubleshooting Ten-Step Tango Advanced Workshop (Length: 1:32:06) Ten-Step Tango Troubleshooting Workshop: Refrigerators (Length: 1:35:57) Whirlpool Duet Washer Schematic Analysis & Whirlpool Dryer Moisture Sensor System (Length: 1:03:04) Neutral Vs. Ground, Inverter Microwave, Digital Communications, Loading Down in DC loads, and more! (Length: 1:14:45) Gas Oven Service Call After a Parts Changing Monkey (Length: 36:04) AFCI and GFCI Circuit Protection Technology (Length: 41:26) Troubleshooting Samsung Refrigerators and more (Length: 1:29:58) 3-way Valves and Dual Evaporator Refrigerators (Length: 1:15:45) Split-Phase Compressors and PTC Start Devices (Length: 1:11:57) Gas Dryer Ignition Systems (Length: 53:50) Refrigerator Sealed System Thermodynamics, Part 1 (Length: 43:07) Refrigerator Sealed System Thermodynamics, Part 2 (Length 1:09:09) To access these webinars and all the other info-goodies here at Appliantology, become a Professional Appliantologist today. If you need cost-effective, time-flexible, state-of-the-art appliance technical training, check out the Master Samurai Tech Academy.
    • Samurai Appliance Repair Man

      [Webinar] Practical Refrigeration Sealed System Thermodynamics - 10/30/2017 @7PM ET   10/19/2017

      Having laid some theoretical groundwork in the last webinar, we're going to focus on practical considerations in this one. Here are the topics we're going to discuss: Review homework from the first session on 10-2-2017. Home refrigerator practical design and operating rules-of-thumb useful for troubleshooting Practical application exercises Troubleshooting scenario exercise Techniques for making system temperature measurements for determining superheat and subcooling Sealed system diagnosis homework assignment (to be reviewed in the next webinar in this series) See this calendar event for more details                   
ngravina

GE Double Oven Microwave not heating

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ngravina

Hi all, I wanted to run this by some of you experts since my knowledge of microwaves is limited.  I have a double oven microwave that runs fine but no heat.  I removed the microwave unit from the oven and brought to shop for diagnose.  So far I have checked all fuses and the capacitor and they check fine.

 

Tested diode and it drops to 6V on a 9volt battery and reads mV when reversed. 

 

I tested the magnetron terminals and they both had resistance of less than 1 ohm, also checked from terminal to mag body and showed infinity.  It looks as though the magnetron is ok.  Is this a foolproof test?

 

I didn't really know how to test the transformer and I can't power the unit on without it installed in the double oven.

 

Any thoughts out there?

 

Thanks,

Nick

 

 

 

 

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Cactus Bob

The ohms test is no way to test a magntron , all your testing is the filament , and most bad magntrons have good filaments 

 

i always thought the ohms test was stupid , but i guess it's the only way to test the thing

 

my rule of thumb : check everything else , if it's all good and you still have no heat , replace the magntron . i have been right 100% of the time

 

I am lucky , i have a bunch of used "test" magntrons , to just switch it out and see what happens

 

just so you know , magntrons are all wired the same inside , as long as you can mount the mag even if it's just 2 screws , you can use it to test for heat .  just use your head and be sure to mount it with a good seal and don't leave an incorrect one on for more that a few mins while testing

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RegUS_PatOff

and the the original problem was no heat ?

(not a blown Fuse) ?

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ngravina

Thanks for the reply!  

 

Yes original problem was no heat, and I the ceramic and thermal fuses check out ok.

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jumptrout

Why can't you make a test cord to power the M/W?

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Samurai Appliance Repair Man

The ohms test is no way to test a magntron , all your testing is the filament , and most bad magntrons have good filaments 

 

Check out the Willie Method™ for testing a magnetron ==> http://appliantology.org/blog/1/entry-236-the-willie-method%E2%84%A2-for-testing-a-microwave-oven-magnetron-tube/

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Chat_in_FL

Why can't you make a test cord to power the M/W?

No model number here, but a test cord to the primary side of x-fmr to by-pass door switches, relays, etc...  and if your diode and cap check out OK, narrows it down to the mag if no heat.

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