Question about Microwave Ovens
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Posted on Jan 02, 2017
I had looped externally P1 and P2 and now it is working , to assure myself I also checked current in primary of transformer it was measured to be from 300 mA to 600 mA when I started to use microoven. For safety I had now fixed 2 Amp fuse between P1 and P2. Is that all ok. To add I checked all voltages mentioned on PCB viz. 30volt, 5 volt etc which on measuring were found almost ok. Any comments please
Posted on Mar 29, 2007
SOURCE: Hi my Panasonic Dimension 4
Re: Thermister at rear of unit is open at room temp. Isn't it supposed to be closed at room temperature? The thermistor is surely defective. Also the door switch testing procedure is not clear. If it is three terminal you mas check that the switch is closing between COM and N.O. terminals when you close the door ( I am generally talking about a three terminals microwave switch, I do not have your oven's model number).
Also test the inverter separately. Read DC in, then make sure that your multimeter can test AC out and read AC out to know if inverter is working. To test the inverter thoroughly you should also use an oscilloscope to check AC phase. Inverter going out of phase is unlikely the problem.
After testing the inverter check oven again (diode and capacitor, door again, wiring , control). Remember to discharge the oven capacitor or you risk to get shocked by an heavy discharge.
Posted on Aug 11, 2011
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