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ApplianceGuru.com: The Samurai Appliance Repair Forums > Do-It-Yourself Appliance Repair Help > The Kitchen Appliance Repair Forum > panasonic microwave problem |
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ApplianceGuru.com: The Samurai Appliance Repair Forums > Do-It-Yourself Appliance Repair Help > The Kitchen Appliance Repair Forum > panasonic microwave problem |
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| panasonic microwave problem | Rate Topic |
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| Posted: Wed Oct 21st, 2009 02:32 am |
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1st Post |
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jwj2357 Senior Apprentice Appliantologist
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STARTS OUT FINE THEN DIMS AND SLOWS AND MAKES A CRACKLIN NOISE MODEL NN-H665BF PANASONIC Last edited on Wed Oct 21st, 2009 02:36 am by jwj2357 |
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| Posted: Wed Oct 21st, 2009 03:14 am |
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2nd Post |
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Cactus Bob Sublime Master of Appliantology 
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SHORTED MAGNTRON 100% if you where to leave it run you would smell wires burning , so dont do it . Last edited on Wed Oct 21st, 2009 03:20 am by Cactus Bob ____________________ SORRY ABOUT THE SPELLING , I FIX GREAT , I DON'T SPELL WELL |
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| Posted: Wed Oct 21st, 2009 03:28 am |
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3rd Post |
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jwj2357 Senior Apprentice Appliantologist
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is this a correct model # hard to see if so do u have a drawing or spec sheet where i could measure resiostance etc maybe just a bad melted connector??? comes apart easy?
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| Posted: Sat Oct 24th, 2009 10:26 pm |
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4th Post |
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jwj2357 Senior Apprentice Appliantologist
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I removed the magnetron. its a panasonic 2M261-M32 number with kl64-0411 0 Y underneath the large numbers above. it seems shorted to me .25 ohms. i used a digital meer but this is a nice meter fluke 87 - true rms multimetr. never went to infinity and bak or anything. is it worth replacing the microwave is only 3 years old? how much is this? Ill look it up and see if I can find it. the wires were fine and connectors etc. the fuse was good like i dsaid it works so door switches are all working and the fuse too it just dims draws toomuch current and makes a good noise.
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| Posted: Sat Oct 24th, 2009 10:35 pm |
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5th Post |
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jwj2357 Senior Apprentice Appliantologist
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they list 3 magnetrons when I type in the 2M261-M32 number? 384531,948384,and 373304. which one would be a direct replacement for this?
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| Posted: Sat Oct 24th, 2009 10:54 pm |
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6th Post |
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Chat_in_RI Sublime Master of Appliantology 
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jwj2357 wrote: they list 3 magnetrons when I type in the 2M261-M32 number? 384531,948384,and 373304. which one would be a direct replacement for this? 384531 has mounting studs on it, the others don't, and 384531 has a different wiring connection than the 373304. So which one looks like yours when you look at them?
____________________ We, the unwilling, led by the unknowing, are doing the impossible for the ungrateful. We have done so much, for so long, with so little, we are now qualified to do anything with nothing. Mother Teresa |
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| Posted: Sat Oct 24th, 2009 10:55 pm |
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7th Post |
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Samurai Appliance Repair Man Fermented Grand Master of Appliantology 
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jwj2357 wrote:
If you measured from one of the mag terminals to ground, then that's affirmative-- you got yerself a short. If between the terminals, that's a normal reading. Match up the magnetron visually: 384531 948384 373304
____________________  If I've helped you with your repair, please consider supporting my flavorite charity: http://beer.fixitnow.com |
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| Posted: Sat Oct 24th, 2009 11:02 pm |
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8th Post |
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jwj2357 Senior Apprentice Appliantologist
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across the two terminals i get .25 ohms that seems normal I get OL from either terminal to ground so no short there. What else could be wrong? where is the cap or transformer on this thing there is a small trans on a board in the front and then on bottom a plastic cover saying caution high voltage but not sure what else to check?
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| Posted: Sun Oct 25th, 2009 11:40 am |
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9th Post |
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Budget Appliance Repair Fellow, Academy of Sublime Masters of Appliantology
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jwj2357 wrote: it just dims draws toomuch current and makes a good noise. It could be a shorted diode, If I remember correctly a shorted diode will make it draw a very large current and make a pretty loud noise, (more of a growling/vibrating noise then crackling thou). You won't usually get the loud noise with a bad magtube unless it is shorted and from checking yours it doesn't seem to be shorted.
____________________ William Burk (Willie) Willie's Budget Appliance Repair Eureka, CA 95501 |
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| Posted: Sun Oct 25th, 2009 08:11 pm |
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10th Post |
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jwj2357 Senior Apprentice Appliantologist
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so where is this Diode on this model and do i need to remove it from a circuit board or what to check it? do you hve any info on this model because I cant seem to find anything on it.
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| Posted: Mon Oct 26th, 2009 02:12 am |
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11th Post |
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RegUS_PatOff Fellow, Academy of Sublime Masters of Appliantology 
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post from 2005 http://applianceguru.com/forum1/347.html
____________________ RegUS_PatOff http://www.youtube.com/watch?v=oPAY2LsKVEw my video production: “Easter Seals Walk With Me” (also in HQ) http://www.youtube.com/watch?v=-EBiLyYXMiA Upon leaving this Earth "Do you want the Smoking or Non-Smoking section ?" |
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| Posted: Mon Oct 26th, 2009 02:17 am |
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12th Post |
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jwj2357 Senior Apprentice Appliantologist
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so how expensive is it to repaie. I do alot of electonics and have tons of diodes at work i like these projects can you help me? I get the blog but would like to know where to check this so I can let my friend know whats up. i will tell her to save her money for a different microwave but would like to fix this if its not way too expensive. thanks!
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| Posted: Mon Oct 26th, 2009 02:49 am |
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13th Post |
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RegUS_PatOff Fellow, Academy of Sublime Masters of Appliantology
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jwj2357 wrote: STARTS OUT FINE THEN DIMS AND SLOWS AND MAKES A CRACKLIN NOISE edit: see photo in following post
____________________ RegUS_PatOff http://www.youtube.com/watch?v=oPAY2LsKVEw my video production: “Easter Seals Walk With Me” (also in HQ) http://www.youtube.com/watch?v=-EBiLyYXMiA Upon leaving this Earth "Do you want the Smoking or Non-Smoking section ?" |
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| Posted: Mon Oct 26th, 2009 03:04 am |
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14th Post |
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jwj2357 Senior Apprentice Appliantologist
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I think it did heat a bit. but lowed so much and dimmed etc.. what are the specs on this diode? where is it located? if i know where it is I can check it and maybe the specs are on it so any info would be great. thanks
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| Posted: Mon Oct 26th, 2009 03:40 am |
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15th Post |
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jwj2357 Senior Apprentice Appliantologist
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hey im sorry but none of these transformers look like what im used to or capacitors for that matter. isnt there any circuit boar pics of these compnents somewhere. theres a circuit board in front behind panel with asmall trnasofrmer there a board with 110 in in back and a high voltage board on bottom with plastic all around it. I removed it so i can see it buit there is a huge heat sink n it and some dark orange maybe caps im not sure nothing like what im use to. would like to check the cap and diode or anything that would produce the issue. I cant even find the model number on the parts site. puts up a different model number older or newer???
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| Posted: Mon Oct 26th, 2009 03:53 am |
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16th Post |
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RegUS_PatOff Fellow, Academy of Sublime Masters of Appliantology
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aahhh .. yes, the Inverter model .. No "conventional" Diode / Transformer / Capacitor one diode is the black rectangular item mounted on Transformer at the bottom of the picture... (there's also another one) click on picture $140 Special Order  Last edited on Mon Oct 26th, 2009 02:18 pm by RegUS_PatOff ____________________ RegUS_PatOff http://www.youtube.com/watch?v=oPAY2LsKVEw my video production: “Easter Seals Walk With Me” (also in HQ) http://www.youtube.com/watch?v=-EBiLyYXMiA Upon leaving this Earth "Do you want the Smoking or Non-Smoking section ?" |
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| Posted: Mon Oct 26th, 2009 12:30 pm |
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17th Post |
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Budget Appliance Repair Fellow, Academy of Sublime Masters of Appliantology
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Ohhhh!!! It's one of those, (inverter models). I've never worked on one of these yet so don't know what kind of things you would find. I don't believe the diode, (if that the black thing on the transformer), comes separate on that unit. It appears to be soldered into place, I believe the complete inverter board needs to be replaced and it maybe more then the microwave is worth.
____________________ William Burk (Willie) Willie's Budget Appliance Repair Eureka, CA 95501 |
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| Posted: Mon Oct 26th, 2009 02:14 pm |
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18th Post |
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RegUS_PatOff Fellow, Academy of Sublime Masters of Appliantology
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edited previous posts ... I did find someone's repair info on the Inverter Board, along with some oscilloscope waveforms, but I don't think you want to go there ... here's an excerpt: "The Control signal turns out to be a TTL-level 220Hz square wave where the duty cycle determines the “Power” from the Magnetron. The Status signal from the PSU is a 110Hz square wave with a fixed 50% duty cycle. This signal seems to be present when there is a current drain, probably to signal that the Magnetron is warm and operating. The Control and Status signals are synchronised to each other, but bear no relationship to AC mains frequency or phase. Notes: 1. At low power levels, the PSU starts at a higher power level (50%) until the Status signal appears, then drops back to a lower level. This could be because the Magnetron filament requires at least the 50% power level for it to heat up, then it sustains itself from back bombardment once RF is being produced. 2. At low levels, the PSU is cycled on and off at the 40% power level over a 22 second period to reduce the average power output."
____________________ RegUS_PatOff http://www.youtube.com/watch?v=oPAY2LsKVEw my video production: “Easter Seals Walk With Me” (also in HQ) http://www.youtube.com/watch?v=-EBiLyYXMiA Upon leaving this Earth "Do you want the Smoking or Non-Smoking section ?" |
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| Posted: Mon Oct 26th, 2009 03:10 pm |
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19th Post |
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jwj2357 Senior Apprentice Appliantologist
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thanks i thought that might be it its on the high voltage board. it has a green dot on side??? maybe different from others for easy identification. Anyway, ill look at this and check it. would there be a part number on it? Do i need to call Panasonic? I just hate to not try to fix things so im willing to tinker. not willing to spend a fortune or replace an expensive board. its less than 5 years old and im wondering if panasonic would fix it for free? whats up with the tamper proof torx screws on the case??? lmao! that is the picture I have of the components so the big copper wire thing is a transformer? never seen one qquite like that. looking at the post below regarding the waves etc. might be willing to actually hook it up to a scope and check it. there is an adjustment pot on board. whats that for any idea?
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| Posted: Mon Oct 26th, 2009 03:11 pm |
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20th Post |
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jwj2357 Senior Apprentice Appliantologist
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ill unsolder it and resolder it if necessary. assuming the board is ok.
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