Question about Panasonic NN-SN657SMicrowave Oven
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
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