- Panasonic microwave, blown inverter board transformer - 2 Updates
- Wiring a 480V Single Phase Circuit - 1 Update
| Andrew <andy29.uk@gmail.com>: Jun 08 12:02AM +0100 Hi, I have an NN-A554W and the transformer on the inverter board has blown. Microwave wouldn't start cooking so I ran it for a moment with the cover off, transformer did a light and smoke display and now it smells like fireworks. I made sure the magnetron was discharged and between the two connections I am getting 0 ohms, but I only have a basic multimeter. Between those and the casing is open. This microwave is at least 10 years old with a lot of use, so how likely is it that the transformer has just gone by itself vs the magnetron or the small mains input board dying and taking the transformer with it? The other thing is that the part number of the inverter/transformer board is A6645M304GP, and the magnetron is a 2M236-M42. A lot of other models seem to use boards that look identical, but not exactly the same part number. For example I have found a site saying that this magnetron can be used with an A66454T05AP or F66454T07AP board, which do look the same as mine, so are they just a different revision or something or are the differences going to be bigger? Even if I need exactly the same board, it looks like I could be chasing a part that would work in many different models, even different brands, if only I knew which one to look for (it seems there are no parts for my model). Am worried about replacing it and having the new one get instantly blown up though. Andrew |
| "pfjw@aol.com" <peterwieck33@gmail.com>: Jun 08 09:04AM -0700 OK. On the one hand: Purchase new Board: US$25 + shipping Install New Board: 2 hours work It all works: All good! Magnetron is bad: Purchase new Magnetron for US$65 + shipping Install new Magnetron: 2 hours work. It wall works: 4 hours + US$90 + shipping. On the other hand, a brand new 1,000 watt microwave: US$150, complete with warranty. I admire your wish to reduce landfill, but I have to wonder at the investment in a 10 year old device that is heavily used by your own description. Peter Wieck Melrose Park, PA |
| bruce2bowser@gmail.com: Jun 08 06:41AM -0700 > to realize that it was single phase rather than terminating > it 3 phase.for Single phase 480v just land the 2 hits and a ground. There > is no such thing as a stupid question my friends. I assume you mean 2 "hots" which would be different phases (not hits) and then a third wire being a green ground connection, a total of three wires. (2 hots of the same phase would be like wiring-up switching devices where one wire is line and the other is load. |
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