ITTSB.EU Blog Forum
Multimeter | Clamp meter | Insulation Resistance Tester | Panel Meter | Oscilloscopes | Test leads & Accessories | Software Updates => Handheld multimeter => Topic started by: Kiriakos GR on November 29, 2024, 06:40:47 PM
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Long story in sort, since today I am owner of one working Kenwood K20MSS10E 20L microwave oven. :)
This microwave oven were rescued from be recycled.
The actual problem was bad contact issue at HV circuit.
But K20MSS10E repair this take several hours even in my hands, because I had to inspect everything and anything.
This is my first ever microwave oven repair, and when I was up to test the High Voltage Diode ( CL01-12 ) and or RG203, I were also fooled by my own multimeter, and I thought the diode as open.
At the inspection of the transformer (MD-801EMR-1 230V 50Hz), I did a much better job.
2.5 Ohm the primary
201 Ohm the high voltage
Low side coil resistance this is almost zero.
Three coils tested, no issue with sort to ground.
About the diode, I will say again that I were fooled, due all my DMM. :P
But this suggestion bellow, it did helped me too, so to verify that my HV diode this was Good after all. ;)
https://www.youtube.com/watch?v=_Bjlwsichs8 (https://www.youtube.com/watch?v=_Bjlwsichs8)
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About my reborn Kenwood K20MSS10E, this is simple to use and very beautiful.
Unfortunately I did not find with it and the glass table, but I did find the base with the wheels.
As fist test I did heat up my coffee cup successfully. 8)
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I think that for the ACV version of a tester, the circuit below it can also work, if this modified by the addition of safe to use crocodile clips.
DIY DB3 Diode Tester 220 ~ 230V
https://www.ittsb.eu/forum/index.php?topic=1809.0 (https://www.ittsb.eu/forum/index.php?topic=1809.0)