Photo a blown mains transformer there are really heavy induction loads inside variety of circuitry so other than switch failure many of these faults are beyond financial repair a Magnetron $20+ a Transformer $40 also a thermal fuse $10. (Solid BeO isn’t specially dangerous.) A ceramic manufactured from BeO is a wonderful temperature conductor and for this explanation may be present in the insulating elements of radar magnetrons including high energy laser tubes and stuff like that.
This question was posed by someone who desired to alter the circuitry to their microwave range to give constant control and a continuing heating rate. Discharge the HV capacitor again, reconnect cable and disconnect the 2 wires towards the magnetron. Oven heats but power appears low or erratic. It is crucial – for your safety and also to avoid injury to the device under test plus your test gear – your big high voltage capacitor in microwave oven generator be completely discharged before touching anything or making dimensions.
Cooling for the anode block must be given by forced air, water, or oil since the microwave generation procedure is about 60 to 75 % efficient and these in many cases are high energy tubes (numerous kilowatts). We break microwave fix down by typical symptoms, like your touchpad is not responding, your microwave is noisy, your tray will not turn, or your door is stuck.
Often these homemade solutions never survive for long but will definitely make sure microwave oven power exists inside the oven chamber. However, high voltage fuses are notably unusual on domestic ovens. The majority of microwave oven dilemmas are often fixed with for the most part a multimeter (DMM or VOM). When purchasing magnetrons off their versus maker, i’ve discovered it best to head to a supplier who specializes in microwave oven parts (i.e. AMI, Worldwide Micro-parts, QB products).
WARNING: don’t use a DMM for checking voltage on the capacitor unless you have actually a suitable high voltage probe. Because of this problem, first check out the thermal cutoffs for both the oven plus the magnetron. If the convection preheat cycle never ever completes as well as the oven is cool when exposed, then either the heating element is bad (test with an ohmmeter) and/or relay managing the heating element and/or controller it self is bad.
These hazards never disappear completely even if unplugged as there is an electricity storage space unit – a top voltage capacitor – that may retain a dangerous charge صيانة ميكروويف شارب for a long period. Bad interlock switches probably take into account most microwave range dilemmas. Plug in capacity to test, the microwave oven range works well.
Shorted magnetron (will most likely not blow primary fuse but HV fuse if used). A triac where half was shorted would end up in a blown fuse due to it acting as a rectifier pumping DC through HV transformer. A microwave range featuring its cord cut or eliminated and its own high voltage capacitor safely discharged is an inanimate object.