- Home


Air Conditioners | Dehumidifiers | Dishwashers | Disposals | Dryers | Freezers | Humidifiers | Ice Makers | Microwave Ovens | Ovens, Ranges, Stoves | Refrigerators | Trash Compactors | Washers | Water Filters

FAQs | Contact | Apprenticeship | Parts | Model Number Help | Newsletter | Beer

Find Appliance Parts & Diagrams Here
Enter a model number, part number, type of appliance, brand, or even a part description.

365-day return policy on all parts ordered through this site!


 Moderated by: BrntToast, RegUS_PatOff, appl.tech.29501 Search Our Sites for More Info! Page:    1  2  Next Page Last Page  
New Topic Reply Printer Friendly
panasonic microwave problem  Rating:  Rating
AuthorPost
 Posted: Wed Oct 21st, 2009 02:32 am
  PM Quote Reply
1st Post
jwj2357
Senior Apprentice Appliantologist
 

Joined: Thu Aug 3rd, 2006
Location:  
Posts: 68
Flavorite Brew: 
Status: 
Offline
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

Back To Top PM Quote Reply  

 Posted: Wed Oct 21st, 2009 03:14 am
  PM Quote Reply
2nd Post
Cactus Bob



Joined: Fri Apr 4th, 2008
Location: Apache Junction, Arizona USA
Posts: 242
Flavorite Brew: Coffee
Status: 
Offline
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
Back To Top PM Quote Reply

 Posted: Wed Oct 21st, 2009 03:28 am
  PM Quote Reply
3rd Post
jwj2357
Senior Apprentice Appliantologist
 

Joined: Thu Aug 3rd, 2006
Location:  
Posts: 68
Flavorite Brew: 
Status: 
Offline
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?

Back To Top PM Quote Reply  

 Posted: Sat Oct 24th, 2009 10:26 pm
  PM Quote Reply
4th Post
jwj2357
Senior Apprentice Appliantologist
 

Joined: Thu Aug 3rd, 2006
Location:  
Posts: 68
Flavorite Brew: 
Status: 
Offline
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.

Back To Top PM Quote Reply

 Posted: Sat Oct 24th, 2009 10:35 pm
  PM Quote Reply
5th Post
jwj2357
Senior Apprentice Appliantologist
 

Joined: Thu Aug 3rd, 2006
Location:  
Posts: 68
Flavorite Brew: 
Status: 
Offline
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?

Back To Top PM Quote Reply  

 Posted: Sat Oct 24th, 2009 10:54 pm
  PM Quote Reply
6th Post
Chat_in_RI



Joined: Tue May 16th, 2006
Location: Rhode Island USA
Posts: 606
Flavorite Brew: Newport Storm, Bass
Status: 
Offline
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
Back To Top PM Quote Reply

 Posted: Sat Oct 24th, 2009 10:55 pm
  PM Quote Reply
7th Post
Samurai Appliance Repair Man
Fermented Grand Master of Appliantology


Joined: Mon Mar 21st, 2005
Location: Otterville, New Hampshire USA
Posts: 16082
Flavorite Brew: Kirin Ichiban
Status: 
Offline
jwj2357 wrote:

it seems shorted to me .25 ohms.


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



____________________
To ask a question, use our new forums==> http://appliantology.org

365-Day No-Hassle Return Policy on all parts purchased through this site, even electrical parts that have been installed!
Back To Top PM Quote Reply  

 Posted: Sat Oct 24th, 2009 11:02 pm
  PM Quote Reply
8th Post
jwj2357
Senior Apprentice Appliantologist
 

Joined: Thu Aug 3rd, 2006
Location:  
Posts: 68
Flavorite Brew: 
Status: 
Offline
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?

Back To Top PM Quote Reply

 Posted: Sun Oct 25th, 2009 11:40 am
  PM Quote Reply
9th Post
Budget Appliance Repair
Fellow, Academy of Sublime Masters of Appliantology
 

Joined: Sat Apr 2nd, 2005
Location: Eureka, California USA
Posts: 2870
Flavorite Brew: 
Status: 
Offline
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
Back To Top PM Quote Reply  

 Posted: Sun Oct 25th, 2009 08:11 pm
  PM Quote Reply
10th Post
jwj2357
Senior Apprentice Appliantologist
 

Joined: Thu Aug 3rd, 2006
Location:  
Posts: 68
Flavorite Brew: 
Status: 
Offline
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.

Back To Top PM Quote Reply

 Posted: Mon Oct 26th, 2009 02:12 am
  PM Quote Reply
11th Post
RegUS_PatOff
Fellow, Academy of Sublime Masters of Appliantology


Joined: Sat Sep 24th, 2005
Location: Milwaukee, Wisconsin USA
Posts: 16509
Flavorite Brew: Indian Head. Black & White
Status: 
Offline
post from 2005

http://applianceguru.com/forum1/347.html

 



____________________
The new repair forums==> http://appliantology.org
Back To Top PM Quote Reply  

 Posted: Mon Oct 26th, 2009 02:17 am
  PM Quote Reply
12th Post
jwj2357
Senior Apprentice Appliantologist
 

Joined: Thu Aug 3rd, 2006
Location:  
Posts: 68
Flavorite Brew: 
Status: 
Offline
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!

Back To Top PM Quote Reply

 Posted: Mon Oct 26th, 2009 02:49 am
  PM Quote Reply
13th Post
RegUS_PatOff
Fellow, Academy of Sublime Masters of Appliantology


Joined: Sat Sep 24th, 2005
Location: Milwaukee, Wisconsin USA
Posts: 16509
Flavorite Brew: Indian Head. Black & White
Status: 
Offline
jwj2357 wrote: STARTS OUT FINE THEN DIMS AND SLOWS AND MAKES A CRACKLIN NOISE

edit:

see photo in following post



____________________
The new repair forums==> http://appliantology.org
Back To Top PM Quote Reply  

 Posted: Mon Oct 26th, 2009 03:04 am
  PM Quote Reply
14th Post
jwj2357
Senior Apprentice Appliantologist
 

Joined: Thu Aug 3rd, 2006
Location:  
Posts: 68
Flavorite Brew: 
Status: 
Offline
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

Back To Top PM Quote Reply

 Posted: Mon Oct 26th, 2009 03:40 am
  PM Quote Reply
15th Post
jwj2357
Senior Apprentice Appliantologist
 

Joined: Thu Aug 3rd, 2006
Location:  
Posts: 68
Flavorite Brew: 
Status: 
Offline
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???

Back To Top PM Quote Reply  

 Posted: Mon Oct 26th, 2009 03:53 am
  PM Quote Reply
16th Post
RegUS_PatOff
Fellow, Academy of Sublime Masters of Appliantology


Joined: Sat Sep 24th, 2005
Location: Milwaukee, Wisconsin USA
Posts: 16509
Flavorite Brew: Indian Head. Black & White
Status: 
Offline

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



____________________
The new repair forums==> http://appliantology.org
Back To Top PM Quote Reply

 Posted: Mon Oct 26th, 2009 12:30 pm
  PM Quote Reply
17th Post
Budget Appliance Repair
Fellow, Academy of Sublime Masters of Appliantology
 

Joined: Sat Apr 2nd, 2005
Location: Eureka, California USA
Posts: 2870
Flavorite Brew: 
Status: 
Offline
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
Back To Top PM Quote Reply  

 Posted: Mon Oct 26th, 2009 02:14 pm
  PM Quote Reply
18th Post
RegUS_PatOff
Fellow, Academy of Sublime Masters of Appliantology


Joined: Sat Sep 24th, 2005
Location: Milwaukee, Wisconsin USA
Posts: 16509
Flavorite Brew: Indian Head. Black & White
Status: 
Offline
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."



____________________
The new repair forums==> http://appliantology.org
Back To Top PM Quote Reply

 Posted: Mon Oct 26th, 2009 03:10 pm
  PM Quote Reply
19th Post
jwj2357
Senior Apprentice Appliantologist
 

Joined: Thu Aug 3rd, 2006
Location:  
Posts: 68
Flavorite Brew: 
Status: 
Offline
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?

Back To Top PM Quote Reply  

 Posted: Mon Oct 26th, 2009 03:11 pm
  PM Quote Reply
20th Post
jwj2357
Senior Apprentice Appliantologist
 

Joined: Thu Aug 3rd, 2006
Location:  
Posts: 68
Flavorite Brew: 
Status: 
Offline
ill unsolder it and resolder it if necessary. assuming the board is ok.

Back To Top PM Quote Reply

Current time is 03:53 am Tell a friend about this page... all your other friends are doing it! Page:    1  2  Next Page Last Page    
- > Do-It-Yourself Appliance Repair Help > The Kitchen Appliance Repair Forum > panasonic microwave problem Top



Find Appliance Parts & Diagrams Here
Enter a model number, part number, type of appliance, brand, or even a part description.

365-day return policy on all parts ordered through this site!

FAQs | Contact | Apprenticeship | Parts | Model Number Help | Newsletter | Beer

Your Sometimes-Lucid Host:
- Home
"If I can't help you fix your appliance and make you 100% satisfied, I will come to your home and slice open my belly, spilling my steaming entrails onto your floor."


UltraBB 1.17 Copyright © 2007-2008 Data 1 Systems
Page processed in 0.2143 seconds (40% database + 60% PHP). 31 queries executed.

Web Analytics