HOME  |  NEWS  |  BLOGS  |  MESSAGES  |  FEATURES  |  VIDEOS  |  WEBINARS  |  INDUSTRIES  |  FOCUS ON FUNDAMENTALS
  |  REGISTER  |  LOGIN  |  HELP
Blogs
Made by Monkeys

Microwave Has a Bad Connection

NO RATINGS
View Comments: Newest First|Oldest First|Threaded View
Page 1/2  >  >>
Amclaussen
User Rank
Platinum
Re: They don't make them like they used to
Amclaussen   2/9/2015 6:08:41 PM
NO RATINGS
Your are right, 78RPM.

Both touch buttons for control and displays are a large part of the weak, failure prone points.  fortunately for me, living in a less developed country has the large advantage that people has to be creative and has a large desire (necessity) to keep their things operating for much longer. Therefore, here in Mexico City, if you go to the old part of the center of the city (downtown), you can find dark places where they sell a lot of parts, like new display units and boards, numerical touchpads and similar parts, so that very poor people buy them in quantities of about a dozen, and then they scourge the garbage lots to find Microwave ovens discarded by less poor people, that with the simple and ingenious change of the failed parts and a through cleaning, live for many more years.  I got a replacement Magnetron for my failed less than 4 years old LG Microwave oven. the part that they gave me as the correct replacement was NOT the same... and even had an smaller magnet and shorter cooling fins. As I was argumenting to them that that piece could not be the correct one, the seller told me: "Take it with you, install it, and if it does not work perfectly, yo return it to me and I give you another that works for free and return the price of this one, but, believe me, this works".  And certainly, it now has endured TWO more years than the original one, so I repaired my failed oven and the oven heats as fast as new! 

As a side note, the previous oven before the LG was a much older Litton, that was working perfectly apart from the partially failed digital display (some segments didn't light) after close to 27 years.  The only modification I did to that old oven, was soldering a pair of MOV Varistors at the AC entrance before the transformer.

Amclaussen, Mexico City.

78RPM
User Rank
Platinum
Re: They don't make them like they used to
78RPM   2/8/2015 12:24:31 PM
NO RATINGS
In my own experience with appliance failures, I find that the touch controls are among the first points of failure, especially on dishwashers and microwave ovens.  I was trying to teach my wife my hypothesis by suggesting that we minimize use of the most-used buttons on the microwave -- 0 and 1. I heat water for tea for 1 minute 50 seconds. I suggested to her that we do it this way: Touch 5,2 for seconds, Start, then +1minute, and voila! One minute, 52 seconds without touching 0 or 1. She gave me stink eye. "Think like and engineer. Think like and engineer," I said as she walked away.

78RPM
User Rank
Platinum
Re: They don't make them like they used to
78RPM   2/8/2015 12:12:16 PM
NO RATINGS
Yes, Larry M, I agree. When you consider the lack of reliability of lead-free solder it makes little sense to use it, particularly in high-reliability components like aircraft, automotive, space, and military components.  I recall that someone in a Design News forum had mentioned that some manufacturers treat lead-free solder as if they were using lead solder, thus making unreliable connections.  And much of our electronics gets recycled today, so the solder can be reclaimed rather than going into ground water.  Weigh the small amount of lead in electronics against the tons of lead in ammunition that gets shot all over the place by gun enthusiasts. But good luck getting the NRA to accept the idea of lead-free ammunition.

rob johnson
User Rank
Iron
short lifetime
rob johnson   1/29/2015 11:05:27 AM
NO RATINGS
A co-worker was telling me about his LG fridge with the ice maker and water dispenser in the door. It was something in the neighborhood of 2 years old. The waterline that is routed in the door sprung a leak. the water then froze causing the door to buldge. He had a service person come out and look at it. The person took the door apart. The waterline was buried in expanding foam insulation and to get to it would have amounted to digging out the expanded foam. The only fix was a new door. The service person tried to order a new door. found that it was not available. LG had discountinued making that style of fridge. So he ended up buying a new fridge. He told me it wasn't another LG. Me,I would have purchased the new fridge then I would have taken the door apart and dug out the insulation got rid of the wet stuff. then I would have gotten a can of expanding foam from the hardware store and refoamed it,reassembled and I would have moved it to the basement as an extra fridge. Forgetting about the icemaker.

Amclaussen
User Rank
Platinum
Re: They don't make them like they used to
Amclaussen   1/28/2015 5:10:52 PM
NO RATINGS
Good point bdcst, in a recent performance evaluation run, a consumers magazine found that more than 80% of the domestic refrigerator problems were related to ice cube makers and cool water dispatchers mounted on the doors. a simple, basic refrigerator is a better design.

bdcst
User Rank
Platinum
Re: They don't make them like they used to..so apply Darwin!
bdcst   1/28/2015 4:52:20 PM
NO RATINGS
If you buy products judiciously you don't need to worry about the cost of field service which, because it requires human labor, has become way out of balance to the value of the original product.  Case in point.  MY 1000 watt microwave oven cost me $50 on sale.  Heck, I couldn't buy a new magnetron tube for what I paid for the entire oven! 

I recently bought a ham radio handy-talkie from a Chinese manufacturer via Amazon.  Total cost for VHF/UHF synthesized radio with Lithium Ion battery, charging stand and free shipping was $35!!  Almost everything electronic these days is made in China.  For fun, I bought a green laser pen on-line for $1.50 including shipping!  Really?  It came with a nice magnetic latching gift box and batteries!

Want to buy only from US stores?  How about an 8 inch Dell tablet computer running Windows 8.1 and also equipped with Office 2010 suite for $199.  Can you by MS office alone for that little money?

As consumers, we have a lot of clout with our wallets and pocketbooks. Buy only well made products at reasonable prices and the crap will eventually go away via "natural selection."

 

Amclaussen
User Rank
Platinum
Re: They don't make them like they used to
Amclaussen   1/28/2015 4:50:39 PM
NO RATINGS
Another s-too-pid measure from the obsessed "eco-illogical" persons and politicians that impose measures that end up causing more harm than good (more electronic garbage that pollutes more than the previous, more durable tin-lead solder built products.

Add this to the ever expanding list: The prohibition of incandescent lightbulbs in favor of CFL's, the impossed use of flammable refrigerants in car air conditioners, the promotion of exclusive mass transit lanes that are empty 99%+ of the time, etc.

bdcst
User Rank
Platinum
Re: They don't make them like they used to
bdcst   1/28/2015 4:36:52 PM
NO RATINGS
Larry, it depends upon the solder formulation.  Early versions of lead free solder were bad news.  I think most of those issues have now been resolved.  There was/is a learning curve.  That said, I still use standard 60/40 tin/lead rosen core solder for my personal projects.

I do wish the consumer appliance industry did not follow the example of the computer, smartphone, software industries with their propensity to declare product lives of only 24 months.  That's way too wasteful, way too expensive and it contributes greatly to runaway technology not allowing humans to catch up and fully adapt to it.

Looking at the explosion of mobile personal communications including the Internet, I think the accelerated progress in electronic wizardry is moving ahead way too quickly for humans to sort out what, in the long haul, will really work for them.   And temporarily, at least, it is skewing human behavior in some unnatural, probably unhealthy ways.

One could, in retrospect, say the same for the televison age.  Households without televison or with serious viewing limits tended to produce children with better reading habits and learning ability.  Binge viewing of on-line video series' today is yet another example of poor human adaptation to new technological resources.

William K.
User Rank
Platinum
Re: They don't make them like they used to
William K.   1/28/2015 3:56:07 PM
NO RATINGS
It sounds like the service tech used the same line all the time. Or else, equally as likely, he used the same diagnosis as the previous service call.

There is no substitute for actual competence.

dbell5
User Rank
Platinum
Re: They don't make them like they used to
dbell5   1/28/2015 3:49:11 PM
NO RATINGS
Well, like the OP, I'm hoping "they" still are making good products.

Our over-range microwave+convection oven was around 10 years old when the microwave went out. My wife called out a (non-manufacturer) tech, who took it down, opened it up, and diagnosed a bad magnetron. $60 service call, creditable against an estimated $250 repair. We had him put it back up for the time being, and since we had another uwave, used it as a convection oven for the last year and a half.

I finally prevailed 2 weeks ago and took it back down, opened it up, and checked it out myself. Shorted high voltage diode! Had one in 2 days from Amazon for <$5.
 Microwave works perfectly again...

OTOH, our 25 year old Jenn-Aire dishwasher has developed a leak under the body. New LG unit being delivered today, so let's hope it lasts as long!

Dave

Page 1/2  >  >>
Partner Zone
More Blogs from Made by Monkeys
Made by Monkeys highlights products that somehow slipped by the QC cops.
Made by Monkeys highlights products that somehow slipped by the QC cops.
Made by Monkeys highlights products that somehow slipped by the QC cops.
Made by Monkeys highlights products that somehow slipped by the QC cops.
Design News Webinar Series
2/25/2015 11:00 a.m. California / 2:00 p.m. New York
12/11/2014 8:00 a.m. California / 11:00 a.m. New York
12/10/2014 8:00 a.m. California / 11:00 a.m. New York
11/19/2014 11:00 a.m. California / 2:00 p.m. New York
Quick Poll
The Continuing Education Center offers engineers an entirely new way to get the education they need to formulate next-generation solutions.
Feb 23 - 27, Baremetal C Programming for Embedded Systems
SEMESTERS: 1  |  2  |  3  |  4  |  5  |  67


Focus on Fundamentals consists of 45-minute on-line classes that cover a host of technologies. You learn without leaving the comfort of your desk. All classes are taught by subject-matter experts and all are archived. So if you can't attend live, attend at your convenience.
Learn More   |   Login   |   Archived Classes
Twitter Feed
Design News Twitter Feed
Like Us on Facebook

Sponsored Content

Technology Marketplace

Copyright © 2015 UBM Canon, A UBM company, All rights reserved. Privacy Policy | Terms of Service