Question about Panasonic NN-A811A Convection/Microwave Oven

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Panasonic Microwave Oven model NN-A883 (inverter) when you switch power on there is a clicking noise comming from the PC board where the mains power comes into the microwave. Front display flashes on/off then displays " refer to manual" it sound like it is trying to switch on

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MicrowaveSvc
  • 8865 Answers

SOURCE: PANASONIC INVERTER MODEL NN-S76OWF

While your exact model in not available for download, you should be able to find one close enough to work here:

http://panasonic.com.au/support/downloads/file_type_results.cfm?fileTypeID=2&productCategoryID=87

We're happy to help and we appreciate your thoughtful rating of our answer.

Posted on Dec 07, 2007

  • 1 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.

Posted on Oct 21, 2008

  • 4 Answers

SOURCE: my microwave says "child" and won't play anymore

Not sure of the TT series models but for the NN series models the procedure is as follows:-

If "Child" is displayed in the display window, then the child safety lock is on.

To remove the child safey lock, press the "Stop/Reset" button 3 times in fairly short succession (less than 3 seconds). The time of day or just the Colon sign (:) is then displayed

If you later want to apply the Child safety lock, then, when the time of day (or colon sign) is displayed, press "Start" 3 times (again in short succession).

Hope this helps

Doug

Posted on Nov 08, 2008

MicrowaveSvc
  • 8865 Answers

SOURCE: Hi, I have a NN-C784MF

Chances are there are other bad parts blowing the diodes, most likely a MOSFET.

Also, the ESR of the electrolytic capacitors should be checked and all board connections must be checked and resoldered if suspect.

If you're not experienced in troubleshooting switched-mode power supplies (inverters) then you can probably save a lot of timer and money by replacing the whole inverter.

You can find the nearest spare parts supplier by selecting your country then the support links at Panasonic.net.

We're happy to help you with free advice and we'd appreciate your thoughtful rating of our answer.

Posted on Jan 02, 2009

  • 1 Answer

SOURCE: Panasonic Microwave NN-A770S getting hot on right side externally

Is it normal for a Panasonic nn-c994s to cycle the fan/inverter
when using combination cook?
16 sec off 6 sec on.
Everything else seems to be working
light, timer counting down, heating food, turntable turning

Posted on Jul 17, 2009

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I have a panasonic microwave with convection oven, grill and steamer. When I switch on the microwave, the house fuse (16 amp) cuts out. With the other functions of the oven, it works fine. Do I need a new...


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test the a) HV rectifier b) Capacitor HV c) HV transformer d) Magnetron e) test the swich for door for short.f) circuit board main is short.
see the diagrams and proceed.

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No power


Either the fuse inside is blown, or the power supply is shot. You can remove the cover of the oven, and look inside at fuse. You can test power supply / inverter with a voltmeter to see if there is power to the main circuit board.

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Purchased a panasonic NN-H965 microwave and yesterday when using it, it started making the following noise: upon starting, the unit works for 3 seconds with funny noises and then it stops. There used to be...


See if this describes what's happening:
  • Put in time, push start and unit runs for 2 seconds, relay clicks, unit goes off. Cook time on display goes off and clock time comes back. Bad upper interlock switch and charred connector
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.

It 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.

If yours is not a Panasonic, please reply back with your brand and model number so we can help you.

We're happy to help you with free advice and we'd appreciate your thoughtful rating of our answer.

Aug 26, 2009 | Panasonic NN-H965 Microwave Oven

2 Answers

Our microwave oven Panasonic NN-S252WF stops after


Our technician suggest that there may be a problem with the Inverter Board in this model, which is something that would need to be looked at by a Service Center.

In rare cases it could be the door switches.

Mar 27, 2009 | Panasonic NN-S252WF Microwave Oven

1 Answer

Microwave cut off


the main control board is "seeingf" a high amprage draw from the inverter board . you have a problem with the inverter or the magntron . parts are more than a new unit . try to stay away from the inverter type , there just not ready for prime time . google "panasonic inverter reviews " and you will see just common your problem is good luck

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Hi, I have a NN-C784MF microwave oven from panasonic which is inverter based. The two diodes # ux-c2b are blown. I replaced them they blew again.Please help. Regards.. Anwar.


Chances are there are other bad parts blowing the diodes, most likely a MOSFET.

Also, the ESR of the electrolytic capacitors should be checked and all board connections must be checked and resoldered if suspect.

If you're not experienced in troubleshooting switched-mode power supplies (inverters) then you can probably save a lot of timer and money by replacing the whole inverter.

You can find the nearest spare parts supplier by selecting your country then the support links at Panasonic.net.

We're happy to help you with free advice and we'd appreciate your thoughtful rating of our answer.

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3 Answers

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This model uses an inverter to produce high voltage instead of a convential transformer system. 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. Some manufacturers do not encourage or assist technicians to repair microwave inverters. Most offer the inverter as a whole assembly. But sometimes that is actually 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 repair shops and ask then specifically about inverter repair and inverter replacement costs for your model number.

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