Worked earlier in the evening. Hour later it would shut off after several seconds. Noticed slight odpr so unplugged it.
If there is spark please do not switch on
unless you have confirmed the fault. It is possible that the Magnetron is
leaking and sparking to the ground. As you have mentioned it was stored, it is
quite possible that insect can get into the oven and create soft spots. When
you switch on these will create a short and make the voltage jump and in the
long run damage the magnetron. Click on replacing waveguides: http://www.espares.co.uk/advice/microwave/a/5/1146/how-to-replace-a-microwave-guide-cover.html
So Remove cover after disconnecting , check for dirt/moisture in the cabin, if
so wipe clean and dry, check the magnetron and area clean and use an jet air to
clean off.
Now switch the microwave power on and use a cup of water to test.
If you notice any sparks shut off as the magnetron or the main HT capacitor can
be faulty. Replace with same type. If not check the waveguides within the cabin
for food particles that can burn and spark, check for rust that can corrode and
spark when the ceramic paint has worn out.
If there is heating without any issues, you can use the microwave safely
Everyone says the interlock switches are the issue when the unit stops after two seconds. In my case, the power relay on the control board just behind the keypad was not conducting when it closed. This requires a replacement relay that you can find online. It is soldered into the board so requires unsoldering the old relay.
You can also cut away the plastic side of the old relay next to the power connections and file down the contacts so the relay conducts again.
This relay and the interlock switches are unnecessarily damaged by opening the door while the microwave is running. Always hit STOP before opening the door.
SOURCE: Panasonic microwave 1200
This model uses an inverter to produce high voltage. That symptom is an usually indication of a problem with the inverter or a bad magnetron. I do not recommend that a person without training and experience ever work on these models. You should be able to locate a Panasonic-authorized servicer here: http://www.pasc.panasonic.com/WhereTo/FindServicer.asp?Pass=1 I would mention the exact symptom when you call so the technician can bring a new inverter with him when he comes out to repair it. Might save you having it pulled into the shop. Good luck!
SOURCE: Microwave shuts off after 3 seconds
Although your model number doesn't seem to show up, the NNS950-series units are powered by an high-voltage inverter. And yours has failed. While an inverter (switched-mode power supply) is more efficient from a power consumption standpoint, it is more complex, thus more statistically prone to fail. These should only be examined and worked on by someone who has the necessary technical qualifications. Seriously. Often the machine-soldered connections in a microwave inverter are too weak, so they eventually fail, especially if heat is high in the area. They sometimes fail catastrophically. When not catastrophically damaged, you may hear clicking or squealing and may smell an electrical odor, which is sometimes obscured by the cooling fan. Sometimes a whole new inverter is cheaper than the time and labor required to fix the old one. If a technician is willing and able to troubleshoot and repair the inverter to component level, it will may be expensive, but may be worth it, especially if he or she will resolder and reinforce connections as needed as part of a thorough repair. That could easily make your inverter beter than a new one! You might be able to get some verbal estimates if you call Panasonic-authorized appliance / microwave repair shops and ask then specifically about inverter component-level repair and simple inverter replacement costs for your exact model number.
SOURCE: operates for 3 seconds on microwave then stops
If
the digital programmer circuit / controller does not get a feedback
signal from the inverter for a period of 3 seconds, the controller will
stop the cook cycle.
It could possibly be as simple as a loose connection in that area. The repair shop your friend used may not have been Panasonic-authorized.
Due to the lethal voltages used and produced, I do not recommend that an inexperienced person work on these.
I would recommend that you contact your nearest Panasonic-authorized servicer.
We're happy to help you with free advice and we'd appreciate your thoughtful rating of our answer.
.
SOURCE: Panasonic Model No. NN-S933BF Microwave Oven
could it be that i didn't follow the manuel because i got it second hand or is it because something is wrong with it,and i have to get it fixed.
SOURCE: Panasonic Genius Sensor 1300W
See if this describes
what's happening:
If so, see http://www.microwavedisplay.com/safety.txt , http://www.microwavedisplay.com/disassembly.txt and http://www.microwavedisplay.com/doorsw.txt
Otherwise, if
the digital programmer circuit / controller does not get a feedback
signal from the inverter for a period of 3 seconds, the controller will
stop the cook cycle.
That may be a loose connection in the wiring between the
inverter, magnetron, and/or control board, or maybe one of
those
components has failed.
Due to the lethal
voltages used and produced in inverters, I do not recommend that an
inexperienced person work on these.
You can find an authorized Panasonic servicer here.
In Canada, you can find an authorized Panasonic servicer here.
We're
happy to help you with free advice and we'd appreciate your thoughtful
rating of our answer.
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