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Microwave oven

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Cursitor Doom

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Mar 22, 2019, 3:37:05 PM3/22/19
to
Hi all,

I have had the same Daewoo microwave oven since I bought it new 7 years
ago and it's always performed *perfectly* up until today. This morning I
stuck some bread in it to defrost and it came out still frozen. No trace
of any heat at all. The platter rotates, the light comes on, the timer
counts down, the fan runs; all is working fine except for the total
absence of heat.
I'm given to understand that microwave ovens typically have a working
life of only around 2 years nowadays, so I'd really like to fix this one
up rather than replace it with something inevitably inferior. Any
suggestions as to what to check for? I have the gear to measure up to
50kV if necessary, and I'd guess the magnetron HT is considerably less
than that figure. So... where to start looking first?



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tabb...@gmail.com

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Mar 22, 2019, 5:18:06 PM3/22/19
to
On Friday, 22 March 2019 19:37:05 UTC, Cursitor Doom wrote:
> Hi all,
>
> I have had the same Daewoo microwave oven since I bought it new 7 years
> ago and it's always performed *perfectly* up until today. This morning I
> stuck some bread in it to defrost and it came out still frozen. No trace
> of any heat at all. The platter rotates, the light comes on, the timer
> counts down, the fan runs; all is working fine except for the total
> absence of heat.
> I'm given to understand that microwave ovens typically have a working
> life of only around 2 years nowadays, so I'd really like to fix this one
> up rather than replace it with something inevitably inferior. Any
> suggestions as to what to check for? I have the gear to measure up to
> 50kV if necessary, and I'd guess the magnetron HT is considerably less
> than that figure. So... where to start looking first?

Likely candidates are the HV diode & HV fuse. Of course it can be other things. And of course they're in the killer section.


NT

John-Del

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Mar 22, 2019, 5:46:20 PM3/22/19
to
On Friday, March 22, 2019 at 3:37:05 PM UTC-4, Cursitor Doom wrote:
> Hi all,
>
> I have had the same Daewoo microwave oven since I bought it new 7 years
> ago and it's always performed *perfectly* up until today. This morning I
> stuck some bread in it to defrost and it came out still frozen. No trace
> of any heat at all. The platter rotates, the light comes on, the timer
> counts down, the fan runs; all is working fine except for the total
> absence of heat.
> I'm given to understand that microwave ovens typically have a working
> life of only around 2 years nowadays, so I'd really like to fix this one
> up rather than replace it with something inevitably inferior. Any
> suggestions as to what to check for? I have the gear to measure up to
> 50kV if necessary, and I'd guess the magnetron HT is considerably less
> than that figure. So... where to start looking first?


The easy place to start is with the door switches. Microwaves usually have several as a fail safe.

With the microwave running, watch the interior light carefully and listen for any change in sound as you slowly rock the door. If the light dims and you hear a buzz begin, you've got a cranky safety interlock switch. There could be a broken activator tang as well and it might be visible right on the door.

Inside, the relays are known to develop cracks in the solder at the pc board, so leaning on the relay and edge connectors could restart the cooking.

Cursitor Doom

unread,
Mar 22, 2019, 5:46:47 PM3/22/19
to
On Fri, 22 Mar 2019 14:18:03 -0700, tabbypurr wrote:

> Likely candidates are the HV diode & HV fuse. Of course it can be other
> things. And of course they're in the killer section.
>

Familiar territory then. I've spent god knows how many years prodding
around inside the HT cages of CROs and whatnot.

tabb...@gmail.com

unread,
Mar 22, 2019, 6:46:22 PM3/22/19
to
On Friday, 22 March 2019 21:46:47 UTC, Cursitor Doom wrote:
> On Fri, 22 Mar 2019 14:18:03 -0700, tabbypurr wrote:

> > Likely candidates are the HV diode & HV fuse. Of course it can be other
> > things. And of course they're in the killer section.
> >
>
> Familiar territory then. I've spent god knows how many years prodding
> around inside the HT cages of CROs and whatnot.

That's good.

Re interlocks, they're designed to short out via a power resistor if any one fails to operate correctly. So usually interlock failure results in an oc shorting resistor - which is a hazardous state in which to run a nuke. So it's always worth checking continuity of the big resistor when you have the cover off. IME interlocks are low on the list of likely suspects.


NT

Peter Jason

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Mar 22, 2019, 7:09:06 PM3/22/19
to
On Fri, 22 Mar 2019 19:37:03 -0000 (UTC), Cursitor
Doom <cu...@notformail.com> wrote:

>Hi all,
>
>I have had the same Daewoo microwave oven since I bought it new 7 years
>ago and it's always performed *perfectly* up until today. This morning I
>stuck some bread in it to defrost and it came out still frozen. No trace
>of any heat at all. The platter rotates, the light comes on, the timer
>counts down, the fan runs; all is working fine except for the total
>absence of heat.
>I'm given to understand that microwave ovens typically have a working
>life of only around 2 years nowadays, so I'd really like to fix this one
>up rather than replace it with something inevitably inferior. Any
>suggestions as to what to check for? I have the gear to measure up to
>50kV if necessary, and I'd guess the magnetron HT is considerably less
>than that figure. So... where to start looking first?

Replacing the lamp has me defeated. I buy a new
mwave then.

Cursitor Doom

unread,
Mar 22, 2019, 9:02:12 PM3/22/19
to
On Sat, 23 Mar 2019 10:09:02 +1100, Peter Jason wrote:

> Replacing the lamp has me defeated. I buy a new mwave then.

I don't want a new one, though! The existing one is built to an amazingly
high standard and the manufacturer has taken time and trouble to finish
it beautifully as well. I'll struggle to find anything around today that
comes close to that quality.

jjhu...@gmail.com

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Mar 23, 2019, 1:15:49 PM3/23/19
to
Most of the tests can be done with the power off (continuity checks)...to summarize:
Ck door switches
Ck power resistor
Ck HV diode
Ck magnetron
Ck HV transformer

I won't repeat/elaborate on these but here is some detailed diagnostic techniques.
https://www.partselect.com/Repair/Microwave/No-Heat/

Ebay is a source of parts, especially magnetrons at reasonable prices. You will see the name Galant as a mfg. The produce something like 70% of the worlds magnetrons and they sell to everybody (panasonic, toshiba, daewoo, etc, etc.
Most of the others are low quality knockoffs...YMMV

You should search online for a schematic for your unit...all will become clear with that in hand. Fairly simple.
J

tabb...@gmail.com

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Mar 23, 2019, 1:53:32 PM3/23/19
to
On Saturday, 23 March 2019 17:15:49 UTC, jjhu...@gmail.com wrote:
> On Friday, March 22, 2019 at 9:02:12 PM UTC-4, Cursitor Doom wrote:
> > On Sat, 23 Mar 2019 10:09:02 +1100, Peter Jason wrote:
> >
> > > Replacing the lamp has me defeated. I buy a new mwave then.
> >
> > I don't want a new one, though! The existing one is built to an amazingly
> > high standard and the manufacturer has taken time and trouble to finish
> > it beautifully as well. I'll struggle to find anything around today that
> > comes close to that quality.

> Most of the tests can be done with the power off (continuity checks)...to summarize:
> Ck door switches
> Ck power resistor
> Ck HV diode
> Ck magnetron
> Ck HV transformer
>
> I won't repeat/elaborate on these but here is some detailed diagnostic techniques.
> https://www.partselect.com/Repair/Microwave/No-Heat/
>
> Ebay is a source of parts, especially magnetrons at reasonable prices. You will see the name Galant as a mfg. The produce something like 70% of the worlds magnetrons and they sell to everybody (panasonic, toshiba, daewoo, etc, etc.
> Most of the others are low quality knockoffs...YMMV
>
> You should search online for a schematic for your unit...all will become clear with that in hand. Fairly simple.
> J

If it's mechanical control, the circuit is much the same for them all. And the cct is usually printed inside the outer cover. Why they're the one appliance to have that I don't know.


NT

Chuck

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Mar 23, 2019, 2:22:35 PM3/23/19
to
On Fri, 22 Mar 2019 19:37:03 -0000 (UTC), Cursitor Doom
<cu...@notformail.com> wrote:

>Hi all,
>
>I have had the same Daewoo microwave oven since I bought it new 7 years
>ago and it's always performed *perfectly* up until today. This morning I
>stuck some bread in it to defrost and it came out still frozen. No trace
>of any heat at all. The platter rotates, the light comes on, the timer
>counts down, the fan runs; all is working fine except for the total
>absence of heat.
>I'm given to understand that microwave ovens typically have a working
>life of only around 2 years nowadays, so I'd really like to fix this one
>up rather than replace it with something inevitably inferior. Any
>suggestions as to what to check for? I have the gear to measure up to
>50kV if necessary, and I'd guess the magnetron HT is considerably less
>than that figure. So... where to start looking first?

Sometimes the relays go intermittent. Try tapping them with an
insulated probe if it isn't door switches, themal cut-off sensor,
filament connections, HV diode or capacitor.

Phil Allison

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Mar 23, 2019, 5:22:36 PM3/23/19
to
Cursitor Doom wrote:

> >
> > Likely candidates are the HV diode & HV fuse. Of course it can be other
> > things. And of course they're in the killer section.
> >
>
> Familiar territory then.
>

** Massive false assumption.


> I've spent god knows how many years prodding
> around inside the HT cages of CROs and whatnot.
>
>

** There is no comparison - microwave ovens are highly lethal to repairers, hundreds of times more so than scopes.

Never play down the risk, that would be a criminal thing to do.




.... Phil

tabb...@gmail.com

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Mar 23, 2019, 5:33:29 PM3/23/19
to
On Saturday, 23 March 2019 21:22:36 UTC, Phil Allison wrote:
> Cursitor Doom wrote:

> > > Likely candidates are the HV diode & HV fuse. Of course it can be other
> > > things. And of course they're in the killer section.
> > >
> >
> > Familiar territory then.
> >
>
> ** Massive false assumption.
>
>
> > I've spent god knows how many years prodding
> > around inside the HT cages of CROs and whatnot.
> >
> >
>
> ** There is no comparison - microwave ovens are highly lethal to repairers, hundreds of times more so than scopes.

but the techniques for dealing with EHT are the same. He's an electrical guy with experience with EHT, not a random newb.


> Never play down the risk, that would be a criminal thing to do.

did anyone? No.

Phil Allison

unread,
Mar 23, 2019, 6:19:12 PM3/23/19
to
tabb...is a dangerous MORON

>
>
> Phil Allison wrote:
> > Cursitor Doom wrote:
>
> > > > Likely candidates are the HV diode & HV fuse. Of course it can be other
> > > > things. And of course they're in the killer section.
> > > >
> > >
> > > Familiar territory then.
> > >
> >
> > ** Massive false assumption.
> >
> >
> > > I've spent god knows how many years prodding
> > > around inside the HT cages of CROs and whatnot.
> > >
> > >
> >
> > ** There is no comparison - microwave ovens are highly lethal
> > to repairers, hundreds of times more so than scopes.
>
> but the techniques for dealing with EHT are the same.


** That is another dangerous false assumption.


> He's an electrical guy with experience with EHT,


** More likely to make him careless with a microwave oven.


> not a random newb.


** Yawnnnn....



> > Never play down the risk, that would be a criminal thing to do.
>
> did anyone?


** Well, you just did and so did he.

But having wanked yourselves bind you cannot read your own posts.


> No.

** Complete fuckwits like you and CD need a giant kick up the arse.

I could not give a SHIT about either of you being electrocuted - but there are others who read these pages and they are not so deserving.



.... Phil

tabb...@gmail.com

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Mar 23, 2019, 8:16:59 PM3/23/19
to
I'm pretty sure how I approach it is safe, but enjoy your trip.

Cursitor Doom

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Mar 24, 2019, 10:26:10 AM3/24/19
to
On Sat, 23 Mar 2019 17:16:57 -0700, tabbypurr wrote:


> I'm pretty sure how I approach it is safe, but enjoy your trip.

Phil would probably like to see me and several other posters here dead if
the truth be known. There is so much hatred in that man. Fortunately,
since I perma-plonked him some time ago I rarely have to see his so-
called "contributions" any more.
I could accept Phil's attitude problem if he gave 100% accurate advice,
I'd happily ignore all the bile as a personality quirk, but he's
frequently wrong and when that's pointed out to him he invariably attacks
whoever exposed it in the most visceral way. I struggle to see how
personal attacks are going to improve his credibility, but if that's what
he believes there's nothing you or I or anyone else can do about it.

Cursitor Doom

unread,
Mar 24, 2019, 11:12:49 AM3/24/19
to
On Sat, 23 Mar 2019 10:15:46 -0700, jjhudak4 wrote:

> Most of the tests can be done with the power off (continuity
> checks)...to summarize:
> Ck door switches Ck power resistor Ck HV diode Ck magnetron Ck HV
> transformer
>
> I won't repeat/elaborate on these but here is some detailed diagnostic
> techniques.
> https://www.partselect.com/Repair/Microwave/No-Heat/
>
> Ebay is a source of parts, especially magnetrons at reasonable prices.
> You will see the name Galant as a mfg. The produce something like 70%
> of the worlds magnetrons and they sell to everybody (panasonic, toshiba,
> daewoo, etc, etc.
> Most of the others are low quality knockoffs...YMMV
>
> You should search online for a schematic for your unit...all will become
> clear with that in hand. Fairly simple.

Many thanks for that info. This is also worth a look:

https://tinyurl.com/y4gh8cdb

Trevor Wilson

unread,
Mar 24, 2019, 1:38:59 PM3/24/19
to
On 23/03/2019 6:37 am, Cursitor Doom wrote:
> Hi all,
>
> I have had the same Daewoo microwave oven since I bought it new 7 years
> ago and it's always performed *perfectly* up until today. This morning I
> stuck some bread in it to defrost and it came out still frozen. No trace
> of any heat at all. The platter rotates, the light comes on, the timer
> counts down, the fan runs; all is working fine except for the total
> absence of heat.
> I'm given to understand that microwave ovens typically have a working
> life of only around 2 years nowadays, so I'd really like to fix this one
> up rather than replace it with something inevitably inferior. Any
> suggestions as to what to check for? I have the gear to measure up to
> 50kV if necessary, and I'd guess the magnetron HT is considerably less
> than that figure. So... where to start looking first?
>


**First off: As Phil has stated, these things are VERY dangerous.
NOTHING like working on the EHT of a TV set (which certainly can bite).
2kV+ of DC WILL kill. No doubt about it.

Next: If it has a big ole' transformer (easy to tell, if you need two
hands to carry it), it should be an easy fix. Diode or magnetron. Most
likely the magnetron, though they usually fail slowly, due to emission
loss. It could be something else though.

Lastly: If it employs an SMPS, rather than a big lump of iron and
copper, dump it and buy a new one. Not worth the effort.


--
Trevor Wilson
www.rageaudio.com.au

---
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Phil Allison

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Mar 24, 2019, 4:15:22 PM3/24/19
to
Cursitor Doom wrote:

>
>
> Phil would probably like to see me and several other posters here dead if
> the truth be known.



** Just all the trolls - like you.



> There is so much hatred in that man.

** Yep - I hate trolls.

They ruin newsgroups for everyone.


> Fortunately,
> since I perma-plonked him some time ago


** What a gutless waste of space you are.


> I could accept Phil's attitude problem if he gave 100% accurate advice,


** No such thing is possible or required of anyone here.

You are completely insane.


> I'd happily ignore all the bile as a personality quirk, but he's
> frequently wrong


** FFS prove it - not once have you ever done that.

You lying pile of shit.



..... Phil

Cursitor Doom

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Mar 24, 2019, 4:40:14 PM3/24/19
to
On Mon, 25 Mar 2019 04:38:56 +1100, Trevor Wilson wrote:

> **First off: As Phil has stated, these things are VERY dangerous.
> NOTHING like working on the EHT of a TV set (which certainly can bite).
> 2kV+ of DC WILL kill. No doubt about it.

*CAN* kill. *Not* WILL. Depends on *several* factors so your "no doubt
about it" is incorrect.
There is one large fat potentially-lethal capacitor in there that needs
to be discharged as the first job to do after the removal of the outer
casing. It doesn't appear to have a bleed resistor for some reason (not
with this particular oven anyway.)

tabb...@gmail.com

unread,
Mar 24, 2019, 5:27:06 PM3/24/19
to
On Sunday, 24 March 2019 14:26:10 UTC, Cursitor Doom wrote:
> On Sat, 23 Mar 2019 17:16:57 -0700, tabbypurr wrote:
>
>
> > I'm pretty sure how I approach it is safe, but enjoy your trip.
>
> Phil would probably like to see me and several other posters here dead if
> the truth be known.

I don't doubt it.

> There is so much hatred in that man. Fortunately,
> since I perma-plonked him some time ago I rarely have to see his so-
> called "contributions" any more.
> I could accept Phil's attitude problem if he gave 100% accurate advice,
> I'd happily ignore all the bile as a personality quirk, but he's
> frequently wrong and when that's pointed out to him he invariably attacks
> whoever exposed it in the most visceral way.

Yup

> I struggle to see how
> personal attacks are going to improve his credibility, but if that's what
> he believes there's nothing you or I or anyone else can do about it.

It would be sensible to say microwaves can electrocute people, not so sensible to insist everyone, despite not knowing what skills they do or don't have, does not have the necessary skills to work with them. It's not difficult, just need to know the issues/gotchas. There's EHT, soakage, leakage, and the principles of the interlock system. Otherwise it's just more electrical equipment, with its design quirks like the transformer.


NT

Phil Allison

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Mar 24, 2019, 9:13:16 PM3/24/19
to
Criminal troll tabb...@gmail.com wrote:


>
> It would be sensible to say microwaves can electrocute people,
>

** Idiotic to say otherwise - you fool.


not so sensible to insist everyone, despite not knowing what skills they do or don't have, does not have the necessary skills to work with them.


** Insane crap.

You must KNOW the person has the knowledge, skill and necessary safety gear on hand. Plus they must not work alone.

Impossible to ascertain that via usenet so the only safe option is to advise against and offer no help.


> It's not difficult, just need to know the issues/gotchas.


** Totally insane crap.

One needs to be trained on the proper precautions with microwaves ovens and USE them.

You are one dangerous fucking idiot.
----------------------------------



..... Phil

tabb...@gmail.com

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Mar 25, 2019, 8:06:07 AM3/25/19
to
On Monday, 25 March 2019 01:13:16 UTC, Phil Allison wrote:
> Criminal troll tabby wrote:
>
>
> >
> > It would be sensible to say microwaves can electrocute people,
> >
>
> ** Idiotic to say otherwise - you fool.

so we get abuse for agreeing with you lol


> not so sensible to insist everyone, despite not knowing what skills they do or don't have, does not have the necessary skills to work with them.
>
> ** Insane crap.
>
> You must KNOW the person has the knowledge, skill and necessary safety gear on hand. Plus they must not work alone.

Neither I nor you need know what skill Mr Doom has.


> Impossible to ascertain that via usenet so the only safe option is to advise against and offer no help.

There are people taking that tack on any subject. Thankfully some are more constructive.


> > It's not difficult, just need to know the issues/gotchas.
>
> ** Totally insane crap.
>
> One needs to be trained on the proper precautions with microwaves ovens and USE them.

If you understand the gotchas & are sensible you're going to use them. We can't do more than that on usenet.


> You are one dangerous fucking idiot.

With respect you don't know what my working practices are with microwaves, which makes your statement a bit silly.


NT

Cursitor Doom

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Mar 25, 2019, 11:24:20 AM3/25/19
to
On Mon, 25 Mar 2019 05:06:04 -0700, tabbypurr wrote:

> With respect you don't know what my working practices are with
> microwaves, which makes your statement a bit silly.
>

See, you politely disagree with him and all you get in response is a load
of foul-mouthed abuse. As if that's really going to win people over! :-D

Cursitor Doom

unread,
Mar 25, 2019, 11:29:52 AM3/25/19
to
On Mon, 25 Mar 2019 05:06:04 -0700, tabbypurr wrote:

> On Monday, 25 March 2019 01:13:16 UTC, Phil Allison wrote:

>> Impossible to ascertain that via usenet so the only safe option is to
>> advise against and offer no help.
>
> There are people taking that tack on any subject. Thankfully some are
> more constructive.

Funny, that. Phil has offered advice to all-comers over the years with
questions about how to fix mains-powered appliances which of course CAN
also kill if you don't know what you're doing. So there you have it: more
proof he doesn't even follow his *own* advice! :-D

John-Del

unread,
Mar 25, 2019, 12:15:29 PM3/25/19
to
On Monday, March 25, 2019 at 11:29:52 AM UTC-4, Cursitor Doom wrote:
> On Mon, 25 Mar 2019 05:06:04 -0700, tabbypurr wrote:
>
> > On Monday, 25 March 2019 01:13:16 UTC, Phil Allison wrote:
>
> >> Impossible to ascertain that via usenet so the only safe option is to
> >> advise against and offer no help.
> >
> > There are people taking that tack on any subject. Thankfully some are
> > more constructive.
>
> Funny, that. Phil has offered advice to all-comers over the years with
> questions about how to fix mains-powered appliances which of course CAN
> also kill if you don't know what you're doing. So there you have it: more
> proof he doesn't even follow his *own* advice! :-D
>


The difference is everyone knows that mains inputs will kill, but most people are unaware of just how dangerous a microwave is compared to any other plug in appliance around the home.

"The U.S. Consumer Product Safety Commission reports that four people are electrocuted each year trying to repair their microwave ovens."

https://www.richmond.com/news/man-dies-while-fixing-microwave/article_ee48c2ac-0128-5530-b7c3-4c7a1c3ff15a.html

Cursitor Doom

unread,
Mar 25, 2019, 12:34:31 PM3/25/19
to
On Fri, 22 Mar 2019 14:18:03 -0700, tabbypurr wrote:

> Likely candidates are the HV diode & HV fuse. Of course it can be other
> things. And of course they're in the killer section.

Spot on. Blown 5kV fuse and HV diode open circuit both directions.
Transformer secondary showing 188 ohms across the winding, so *hopefully*
a quick fix. But I'd better just check the magnetron first.......
:-/

Fox's Mercantile

unread,
Mar 25, 2019, 12:38:49 PM3/25/19
to
On 3/25/19 11:15 AM, John-Del wrote:
>
> The difference is everyone knows that mains inputs will kill, but most people are unaware of just how dangerous a microwave is compared to any other plug in appliance around the home.
>
> "The U.S. Consumer Product Safety Commission reports that four people are electrocuted each year trying to repair their microwave ovens."
>
> https://www.richmond.com/news/man-dies-while-fixing-microwave/article_ee48c2ac-0128-5530-b7c3-4c7a1c3ff15a.html
>

Ya-but.
How many people die from accidents with guns?
Drunk driving.
Trying to make "jack ass" videos for you tube?

Considering the number of microwave ovens out there,that's a
pretty low death rate.

The best advice you can give about working on micro wave ovens
is:
The voltages, and the components that use/store them are lethal.
In the words of Sgt. Phil from Hill Street Blues, "Let's be
careful out there."


--
"I am a river to my people."
Jeff-1.0
WA6FWi
http:foxsmercantile.com

peterw...@gmail.com

unread,
Mar 25, 2019, 12:44:05 PM3/25/19
to
On Monday, March 25, 2019 at 12:15:29 PM UTC-4, John-Del wrote:

> The difference is everyone knows that mains inputs will kill, but most people are unaware of just how dangerous a microwave is compared to any other plug in appliance around the home.
>
> "The U.S. Consumer Product Safety Commission reports that four people are electrocuted each year trying to repair their microwave ovens."
>
> https://www.richmond.com/news/man-dies-while-fixing-microwave/article_ee48c2ac-0128-5530-b7c3-4c7a1c3ff15a.html

Some opinions here:

Tabby would try the patience of Job, and is no more right, nor wrong than Phil on a general basis. Which is damned with faint praise, if ever there were.

Phil, were he to behave "at home" as he does "away" on this group would be, rapidly, rendered incapacitated, probably on a permanent basis. There is some significant pathology going on there, rendering Phil a figure to be pitied.

I am as good with invective and vituperation as the next guy, here, and seldom find the need to use vulgarity. But, Phil is one sort of special case, being as that is all he has. And Tabby is another sort of special case, as he *must* find the exceptional case for everything. Which, at the very least, gets tiresome.

Peter Wieck
Melrose Park, PA

John-Del

unread,
Mar 25, 2019, 12:47:14 PM3/25/19
to
On Monday, March 25, 2019 at 12:38:49 PM UTC-4, Fox's Mercantile wrote:
> On 3/25/19 11:15 AM, John-Del wrote:
> >
> > The difference is everyone knows that mains inputs will kill, but most people are unaware of just how dangerous a microwave is compared to any other plug in appliance around the home.
> >
> > "The U.S. Consumer Product Safety Commission reports that four people are electrocuted each year trying to repair their microwave ovens."
> >
> > https://www.richmond.com/news/man-dies-while-fixing-microwave/article_ee48c2ac-0128-5530-b7c3-4c7a1c3ff15a.html
> >
>
> Ya-but.
> How many people die from accidents with guns?
> Drunk driving.

In fairness, pretty much all guns are handled at some point, and a LOT of people drive drunk daily. And like mains voltages, pretty much everyone knows guns and drunk driving are and is dangerous. Really, how many people take apart their microwaves? Gotta be a tiny percentage I would think.


> Trying to make "jack ass" videos for you tube?
>

Cripes Jeff, I make one Jack Ass video and you won't let me live that down. No more shares for you.


Look165

unread,
Mar 25, 2019, 12:59:43 PM3/25/19
to
The only guilty part can be : mains transtormer, HV diode and HV capacitor.
A magnetron never dies.
A HV diode cannot be checked with standard tools.
The best is to check the HV at the cap (take care to your hands).
It must be some 10 kV or more.
For heating, refer to your control board.

Ralph Mowery

unread,
Mar 25, 2019, 1:20:49 PM3/25/19
to
In article <q7avuk$u4q$1...@dont-email.me>, cu...@notformail.com says...
>
> > Likely candidates are the HV diode & HV fuse. Of course it can be other
> > things. And of course they're in the killer section.
>
> Spot on. Blown 5kV fuse and HV diode open circuit both directions.
> Transformer secondary showing 188 ohms across the winding, so *hopefully*
> a quick fix. But I'd better just check the magnetron first.......
> :-/
>
>
>

What did you use to check the diode ? Many of the high voltage diodes
are actually several in series in the same package. Most meters will
not check them as there are several volts dropped across them.
The meters will often show them as open in both directions evenif they
are good.



mako...@yahoo.com

unread,
Mar 25, 2019, 1:45:38 PM3/25/19
to

> A magnetron never dies.


say what?

the filament can open.

m

three_jeeps

unread,
Mar 25, 2019, 1:45:49 PM3/25/19
to
Aside from sprinkling bits of technical troubleshooting and safety advice in a string of email exchanges, I was reminded of this comprehensive 'Microwave repair' document. Should be read and understood before one even unplugs the device to be repaired.

(When one considers that the charge stored in the microwave capacitor is significantly (x10+) the charge from public defibrillators (AEDs) the energy is definitely high enough to put a human being horizontal - permanently!)

https://www.repairfaq.org/sam/micfaq.htm#micpre

j

Fox's Mercantile

unread,
Mar 25, 2019, 3:23:14 PM3/25/19
to
On 3/25/19 11:47 AM, John-Del wrote:
> Cripes Jeff, I make one Jack Ass video and you won't let me live that down. No more shares for you.


Bwahahaha

Jeff Liebermann

unread,
Mar 25, 2019, 4:08:42 PM3/25/19
to
Yep. The normal "diode check" found on most meters doesn't work. I
usually get about 100Kohms in the forward direction and infinity in
the reverse on my Simpson 260 meter (which uses a 15v battery for the
high resistance scales):
<https://www.partselect.com/Microwave+test-diode+repair.htm>

Or, use a 9V battery
<https://www.youtube.com/watch?v=1pp4LUrq4DM>
<https://www.youtube.com/watch?v=F1mTElvwcBg>
<https://www.youtube.com/watch?v=R7wpRRU8vEY>

If the microwave oven doesn't kill you, perhaps the popcorn will?
"Man shocked to death by exploding microwave"
<https://www.news24.com/World/News/man-shocked-to-death-by-exploding-microwave-20181109>
Please remember that you have only one life to give to your hobby or
profession.

--
Jeff Liebermann je...@cruzio.com
150 Felker St #D http://www.LearnByDestroying.com
Santa Cruz CA 95060 http://802.11junk.com
Skype: JeffLiebermann AE6KS 831-336-2558

Cursitor Doom

unread,
Mar 25, 2019, 4:49:55 PM3/25/19
to
There are two (safe) checks to test a magnetron: resistance between pins
both ways round should be less than 1ohm and resistance between each pin
and the 'tron case should be open-circuit.

Cursitor Doom

unread,
Mar 25, 2019, 4:52:17 PM3/25/19
to
On Mon, 25 Mar 2019 13:20:41 -0400, Ralph Mowery wrote:

> What did you use to check the diode ? Many of the high voltage diodes
> are actually several in series in the same package. Most meters will
> not check them as there are several volts dropped across them.
> The meters will often show them as open in both directions evenif they
> are good.

I used a 9v battery and just checked for low-res one way and high-res the
other. Totally dead in both directions.

Look165

unread,
Mar 25, 2019, 4:55:29 PM3/25/19
to
You cannot check a HV diode.
The only way for a microwave is to chek the HV at the cap, and the
filament some 10 A.

Cursitor Doom

unread,
Mar 25, 2019, 6:44:17 PM3/25/19
to
On Mon, 25 Mar 2019 21:55:27 +0100, Look165 wrote:

> You cannot check a HV diode.

I just have! Maybe it's YOU who has a problem with them?

Phil Allison

unread,
Mar 25, 2019, 8:09:54 PM3/25/19
to
tabb the criminal moron troll ...@gmail.com wrote:


> >
> > > It would be sensible to say microwaves can electrocute people,
> > >
> >
> > ** Idiotic to say otherwise - you fool.
>
> so we get abuse for agreeing with you lol
>

** We do not agree on anything.

>
> > not so sensible to insist everyone, despite not knowing what skills they do or don't have, does not have the necessary skills to work with them.
> >
> > ** Insane crap.
> >
> > You must KNOW the person has the knowledge, skill and necessary safety gear on hand. Plus they must not work alone.
>
> Neither I nor you need know what skill Mr Doom has.


** Irrelevant to you posting bad advice on a public forum which anyone can read at any time.


> > Impossible to ascertain that via usenet so the only safe option is to advise against and offer no help.
>
> There are people taking that tack on any subject.


** Completely irrelevant garbage.

A false argument of the dumbest kind.



> > > It's not difficult, just need to know the issues/gotchas.
> >
> > ** Totally insane crap.
> >
> > One needs to be trained on the proper precautions with microwaves ovens and USE them.
>
> If you understand the gotchas & are sensible you're going to use them. We can't do more than that on usenet.
>
>

** Dangerous drivel.

Erring on the side of caution is a foreign concept to a raving fuckwit like you.


> > You are one dangerous fucking idiot.
>
>
> With respect you don't know what my working practices are with microwaves,


** Utter and COMPLETELY irrelevant, I was NOT talking about your or CD practices !!!!

The danger is of course to folk reading you fucking tripe on this NG.


FYI:

You have a monstrous reading disability along with rampant autism and a bloated and diseased ego.

Plus you are a vile coward hiding behind a fake name and complete anonymity.

Fuck you.


.... Phil





Phil Allison

unread,
Mar 25, 2019, 8:17:01 PM3/25/19
to
Fox's Mercantile wrote:
>
> John-Del wrote:
> >
> > The difference is everyone knows that mains inputs will kill,
> > but most people are unaware of just how dangerous a microwave
> > is compared to any other plug in appliance around the home.
> >
> > "The U.S. Consumer Product Safety Commission reports that four
> > people are electrocuted each year trying to repair their microwave ovens."
> >
> > https://www.richmond.com/news/man-dies-while-fixing-microwave/article_ee48c2ac-0128-5530-b7c3-4c7a1c3ff15a.html
> >
>
>
> Ya-but.
> How many people die from accidents with guns?
> Drunk driving.
> Trying to make "jack ass" videos for you tube?
>


** Completely irrelevant to posting dangerous advice on a public forum.


> Considering the number of microwave ovens out there,that's a
> pretty low death rate.
>

** Lets try to keep it that way by never encouraging "joe public" to tackle a microwave oven.


> The best advice you can give about working on micro wave ovens
> is:

** Don't.

I see you use your real name here so are at risk of being sued for posting advice that leads to personal injury or death.

The two irresponsible shitheads I am up against here are both anonymous.


.... Phil

tabb...@gmail.com

unread,
Mar 26, 2019, 10:22:39 AM3/26/19
to
On Monday, 25 March 2019 17:45:49 UTC, three_jeeps wrote:
> On Monday, March 25, 2019 at 12:34:31 PM UTC-4, Cursitor Doom wrote:
> > On Fri, 22 Mar 2019 14:18:03 -0700, tabbypurr wrote:
> >
> > > Likely candidates are the HV diode & HV fuse. Of course it can be other
> > > things. And of course they're in the killer section.
> >
> > Spot on. Blown 5kV fuse and HV diode open circuit both directions.
> > Transformer secondary showing 188 ohms across the winding, so *hopefully*
> > a quick fix. But I'd better just check the magnetron first.......
> > :-/

> Aside from sprinkling bits of technical troubleshooting and safety advice in a string of email exchanges, I was reminded of this comprehensive 'Microwave repair' document. Should be read and understood before one even unplugs the device to be repaired.
>
> (When one considers that the charge stored in the microwave capacitor is significantly (x10+) the charge from public defibrillators (AEDs) the energy is definitely high enough to put a human being horizontal - permanently!)
>
> https://www.repairfaq.org/sam/micfaq.htm#micpre
>
> j

like so many documents, too many errors early in the piece to finish reading.


NT

tabb...@gmail.com

unread,
Mar 26, 2019, 10:25:33 AM3/26/19
to
On Monday, 25 March 2019 20:08:42 UTC, Jeff Liebermann wrote:

> If the microwave oven doesn't kill you, perhaps the popcorn will?
> "Man shocked to death by exploding microwave"
> <https://www.news24.com/World/News/man-shocked-to-death-by-exploding-microwave-20181109>
> Please remember that you have only one life to give to your hobby or
> profession.

Which part of a microwave is even capable of explosion? And how would said explosion result in electrocution?


NT

tabb...@gmail.com

unread,
Mar 26, 2019, 10:26:42 AM3/26/19
to
On Monday, 25 March 2019 22:44:17 UTC, Cursitor Doom wrote:
> On Mon, 25 Mar 2019 21:55:27 +0100, Look165 wrote:
>
> > You cannot check a HV diode.
>
> I just have! Maybe it's YOU who has a problem with them?

Put the diode in series with a 15w filament lamp, connect to mains.


NT

tabb...@gmail.com

unread,
Mar 26, 2019, 10:38:01 AM3/26/19
to
On Tuesday, 26 March 2019 00:09:54 UTC, Phil Allison wrote:
> tabbypurr wrote:

> > > > It would be sensible to say microwaves can electrocute people,
> > > >
> > >
> > > ** Idiotic to say otherwise - you fool.
> >
> > so we get abuse for agreeing with you lol
> >
>
> ** We do not agree on anything.

obviously we did on that point


> > > not so sensible to insist everyone, despite not knowing what skills they do or don't have, does not have the necessary skills to work with them.
> > >
> > > ** Insane crap.
> > >
> > > You must KNOW the person has the knowledge, skill and necessary safety gear on hand. Plus they must not work alone.
> >
> > Neither I nor you need know what skill Mr Doom has.
>
>
> ** Irrelevant to you posting bad advice on a public forum which anyone can read at any time.

I won't ask how pointing out the existence hazards is bad advie


> > > Impossible to ascertain that via usenet so the only safe option is to advise against and offer no help.
> >
> > There are people taking that tack on any subject.
>
> ** Completely irrelevant garbage.
>
> A false argument of the dumbest kind.

on the contrary. We routinely discuss circuits with hazards here. Next you'll object to any and all safer driving advice.


> > > > It's not difficult, just need to know the issues/gotchas.
> > >
> > > ** Totally insane crap.
> > >
> > > One needs to be trained on the proper precautions with microwaves ovens and USE them.
> >
> > If you understand the gotchas & are sensible you're going to use them. We can't do more than that on usenet.
>
> ** Dangerous drivel.

no, understanding & working safely is the solution to work hazards.


> Erring on the side of caution is a foreign concept to a raving fuckwit like you.

2 silly claims in one


> > > You are one dangerous fucking idiot.
> >
> > With respect you don't know what my working practices are with microwaves,
>
> ** Utter and COMPLETELY irrelevant, I was NOT talking about your or CD practices !!!!
>
> The danger is of course to folk reading you fucking tripe on this NG.

The hazards of nuke repair exist whether I mention them or not. Mentioning them enables people to get informed & competent/safe & motivates them to do so.


> FYI:
>
> You have a monstrous reading disability along with rampant autism and a bloated and diseased ego.

you say that about most who disagree with you.


> Plus you are a vile coward hiding behind a fake name and complete anonymity.
>
> Fuck you.

I wonder why, with nutcases like you online.


NT

Fox's Mercantile

unread,
Mar 26, 2019, 10:48:48 AM3/26/19
to
It's your typical fake news article in a tabloid, what did you expect?

Fox's Mercantile

unread,
Mar 26, 2019, 10:53:18 AM3/26/19
to
Are you that insecure that you have to argue with Phil?

tabb...@gmail.com

unread,
Mar 26, 2019, 12:06:28 PM3/26/19
to
On Tuesday, 26 March 2019 14:53:18 UTC, Fox's Mercantile wrote:
> Are you that insecure that you have to argue with Phil?

What does insecurity have to do with it? Nothing.
Your playground antics may be though.

Fox's Mercantile

unread,
Mar 26, 2019, 12:14:52 PM3/26/19
to
Thank you for proving my point.

tabb...@gmail.com

unread,
Mar 26, 2019, 12:24:54 PM3/26/19
to
On Tuesday, 26 March 2019 16:14:52 UTC, Fox's Mercantile wrote:
> On 3/26/19 11:06 AM, tabbypurr wrote:
> > On Tuesday, 26 March 2019 14:53:18 UTC, Fox's Mercantile wrote:

> >> Are you that insecure that you have to argue with Phil?
> >
> > What does insecurity have to do with it? Nothing.
> > Your playground antics may be though.
> >
>
> Thank you for proving my point.

Well you're entitled to your opinion, but I'm hardly going to regard it as realistic in this case. Telling others what they think & feel when you don't know is a fool's game.

three_jeeps

unread,
Mar 26, 2019, 12:57:20 PM3/26/19
to
Care to elaborate on the errors? aside from the dead links....

Cursitor Doom

unread,
Mar 26, 2019, 3:23:05 PM3/26/19
to
On Tue, 26 Mar 2019 07:25:30 -0700, tabbypurr wrote:

> Which part of a microwave is even capable of explosion? And how would
> said explosion result in electrocution?

Seems some poor, terrified folk here appear to believe defusing an IED to
be less of a hazard than fixing a common domestic appliance!

Cursitor Doom

unread,
Mar 26, 2019, 3:25:48 PM3/26/19
to
The barrier height potential of a HV diode isn't that great that it can't
be more safely checked with a simple 9V battery. That's what I used and
it's perfectly OK for the purpose.

peterw...@gmail.com

unread,
Mar 26, 2019, 3:33:48 PM3/26/19
to
On Tuesday, March 26, 2019 at 3:23:05 PM UTC-4, Cursitor Doom wrote:

>
> Seems some poor, terrified folk here appear to believe defusing an IED to
> be less of a hazard than fixing a common domestic appliance!

Not so much. What it comes down to is that a microwave oven is a commodity cheaply available and generally pretty reliable, that also, with basic care will last very nearly indefinitely. In the 40 years I have used such devices, I can state with absolute specificity that I have never had to trash such a unit for failure. Wear, cosmetics, unsuitability, sure. But total failure, no.

The most expensive unit we own is at our summer house, an over-stove device with pretty much every bell and whistle out there, including the wash-car, walk-dog options. Which we purchased on-sale for $150. We have a equally "optimized" counter-top unit at home that we got for $115, and it just turned 10. We have no place for an over-counter unit in any case.

With that in mind, there is no reason on this planet to attempt to repair such a device, especially without the necessary specific tooling, the time involved and the cost of any parts or pieces. I would rather spend that time doing something of use - such as restoring a vintage bit of audio equipment, or a clock or similar. We know that a junker would be recycled, so even that concern is soothed.

Peter Wieck
Melrose Park, PA

tabb...@gmail.com

unread,
Mar 26, 2019, 4:11:42 PM3/26/19
to
On Tuesday, 26 March 2019 16:57:20 UTC, three_jeeps wrote:
From the bit I read...


"Microwave ovens are without a doubt, the most deadly type of consumer electronic equipment in wide spread use. "

nothing to do with reality


"Connoisseurs of fine dining will turn up their collective noses at the thought of using a microwave oven for much beyond boiling water - if that."

half true. Reality is microwaving is the best way to cook some things taste-wise - as well as being a lousy option for some.


"the microwave oven has not changed substantially in the last 20 years."

half true, most haven't changed significantly in about 40 years.


"Touchpads are now nearly universal because they are cheaper to manufacture than mechanical timers (and also more convenient)"

cheap nukes are normally mechanical control, thus I could conclude mechanical controls are cheaper.


"Bad interlocks switches or door misalignment causing fuses to blow or no operation when the start button is pressed. Locate and replace defective switches and/or realign door."

risky advice. The shorting resistor must always be checked, otherwise the oven may cook but interlock has no ability to cut the power by shorting if there is a further door/interlock fault.


"Blown fuse due to power surge or old age: Replace fuse. On rare occasions, the main fuse may even be intermittent causing very strange symptoms. "

again the shorting resistor must be checked.


"if you can do the repair yourself, the equation changes dramatically as your parts costs will be 1/2 to 1/4 of what a professional will charge"

I never paid anything like that for nuke parts
I didn't read any further.


NT

tabb...@gmail.com

unread,
Mar 26, 2019, 4:14:04 PM3/26/19
to
On Tuesday, 26 March 2019 19:33:48 UTC, pf...@aol.com wrote:
> On Tuesday, March 26, 2019 at 3:23:05 PM UTC-4, Cursitor Doom wrote:

> > Seems some poor, terrified folk here appear to believe defusing an IED to
> > be less of a hazard than fixing a common domestic appliance!
>
> Not so much. What it comes down to is that a microwave oven is a commodity cheaply available and generally pretty reliable, that also, with basic care will last very nearly indefinitely. In the 40 years I have used such devices, I can state with absolute specificity that I have never had to trash such a unit for failure. Wear, cosmetics, unsuitability, sure. But total failure, no.
>
> The most expensive unit we own is at our summer house, an over-stove device with pretty much every bell and whistle out there, including the wash-car, walk-dog options. Which we purchased on-sale for $150. We have a equally "optimized" counter-top unit at home that we got for $115, and it just turned 10. We have no place for an over-counter unit in any case.
>
> With that in mind, there is no reason on this planet to attempt to repair such a device,

A simple nonsequitur. You might not wish to do a minor repair to save $100-400, but some do. And sometimes getting an oven that fits a certain space can be tricky, repairing is then much quicker.


NT

Trevor Wilson

unread,
Mar 26, 2019, 4:28:09 PM3/26/19
to
On 26/03/2019 3:59 am, Look165 wrote:
> The only guilty part can be : mains transtormer, HV diode and HV capacitor.
> A magnetron never dies.

**Huh?

In what universe do you imagine that a vacuum tube:

* Does not lose emission?
* Does not suffer a filament failure?

Magnetrons do, indeed, fail. I've replaced quite a number of the years.
Usually, they gradually lose emission and take longer to heat food.
Sometimes, they just fail, due to an O/C filament.


--
Trevor Wilson
www.rageaudio.com.au

---
This email has been checked for viruses by Avast antivirus software.
https://www.avast.com/antivirus

Fox's Mercantile

unread,
Mar 26, 2019, 4:56:32 PM3/26/19
to
On 3/26/19 3:14 PM, tabb...@gmail.com wrote:
> A simple nonsequitur. You might not wish to do a minor repair
> to save $100-400, but some do. And sometimes getting an oven
> that fits a certain space can be tricky, repairing is then
> much quicker.

I haven't paid more than $30 for a microwave oven in the past
20 years. And typically between $15-20 at the Good Will.

The two failures I've had were the processor based control from
The first one just quit working. In retrospect it might have
just been something loose from moving to Texas. The other was
a "twist the knob" timer. The knob fell apart. I found a new,
not matching, knob and found out why the old one broke. The
mechanical timer seized up.

One of the microwaves I bought, I paid $10 for and rewound the
transformer to turn it into a spot welder.

But, hey, if you want to spend $100-400 on a microwave oven, be
my guest.

tabb...@gmail.com

unread,
Mar 26, 2019, 5:55:11 PM3/26/19
to
On Tuesday, 26 March 2019 20:56:32 UTC, Fox's Mercantile wrote:
> On 3/26/19 3:14 PM, tabbypurr wrote:

> > A simple nonsequitur. You might not wish to do a minor repair
> > to save $100-400, but some do. And sometimes getting an oven
> > that fits a certain space can be tricky, repairing is then
> > much quicker.
>
> I haven't paid more than $30 for a microwave oven in the past
> 20 years. And typically between $15-20 at the Good Will.
>
> The two failures I've had were the processor based control from
> The first one just quit working. In retrospect it might have
> just been something loose from moving to Texas. The other was
> a "twist the knob" timer. The knob fell apart. I found a new,
> not matching, knob and found out why the old one broke. The
> mechanical timer seized up.
>
> One of the microwaves I bought, I paid $10 for and rewound the
> transformer to turn it into a spot welder.
>
> But, hey, if you want to spend $100-400 on a microwave oven, be
> my guest.

Combi cookers are in that price range, and hard to find used.


NT

Fox's Mercantile

unread,
Mar 26, 2019, 6:11:17 PM3/26/19
to
A cheap microwave for under $30 used.
And a new toaster oven for under $30.

Any questions?

Phil Allison

unread,
Mar 26, 2019, 9:38:03 PM3/26/19
to
three_jeeps wrote:

>
> >
> > > https://www.repairfaq.org/sam/micfaq.htm#micpre
> > >
> > > j
> >
> > like so many documents, too many errors early in the
> > piece to finish reading.
> >
> >
> > NT
>
> Care to elaborate on the errors?
>
>

** The is nothing wrong with the information in the link.

There is EVERYTHING wrong with NT's lunatic ideas.

The strong and very correct warning out the risk of going inside a microwave oven:

" Careless troubleshooting of a microwave oven can result in death or worse. Experienced technicians have met their maker as a result of a momentary lapse of judgement while testing an oven with the cover removed. Microwave ovens are without a doubt, the most deadly type of consumer electronic equipment in wide spread use. "


NT is a dangerous, raving nut case who needs to be driven off usenet.



..... Phil



Cursitor Doom

unread,
Mar 26, 2019, 9:40:05 PM3/26/19
to
On Tue, 26 Mar 2019 13:14:02 -0700, tabbypurr wrote:

> A simple nonsequitur. You might not wish to do a minor repair to save
> $100-400, but some do. And sometimes getting an oven that fits a certain
> space can be tricky, repairing is then much quicker.

And of course it's not all about the money. AFAIC, the prime motivation
is not throwing out a perfectly serviceable appliance simply because it
"packed up one day" when the fault most often is the failure of some
minor component costing just pennies.

If there's one thing I can't stomach, it's waste. It's verging on
criminal for someone with an electrical background to not even bother to
investigate the cause of a problem in an electrical appliance.

Cursitor Doom

unread,
Mar 26, 2019, 9:43:20 PM3/26/19
to
On Tue, 26 Mar 2019 17:11:09 -0500, Fox's Mercantile wrote:

> A cheap microwave for under $30 used.
> And a new toaster oven for under $30.
>
> Any questions?

Your *own* microwave back in service for under $3 worth of parts and half
an hour of your time.
No contest.

Fox's Mercantile

unread,
Mar 26, 2019, 10:16:55 PM3/26/19
to
On 3/26/19 8:43 PM, Cursitor Doom wrote:
> On Tue, 26 Mar 2019 17:11:09 -0500, Fox's Mercantile wrote:
>
>> A cheap microwave for under $30 used.
>> And a new toaster oven for under $30.
>>
>> Any questions?
>
> Your *own* microwave back in service for under $3 worth of parts and half
> an hour of your time.
> No contest.

Have you priced a mechanical timer? Or a CPU based controller?

tabb...@gmail.com

unread,
Mar 26, 2019, 10:17:23 PM3/26/19
to
On Tuesday, 26 March 2019 22:11:17 UTC, Fox's Mercantile wrote:
Yes. What wally thinks a cheap nuke and a toaster oven is a good replacement for a combi oven?

tabb...@gmail.com

unread,
Mar 26, 2019, 10:39:45 PM3/26/19
to
On Wednesday, 27 March 2019 02:16:55 UTC, Fox's Mercantile wrote:
> On 3/26/19 8:43 PM, Cursitor Doom wrote:
> > On Tue, 26 Mar 2019 17:11:09 -0500, Fox's Mercantile wrote:

> >> A cheap microwave for under $30 used.
> >> And a new toaster oven for under $30.
> >>
> >> Any questions?
> >
> > Your *own* microwave back in service for under $3 worth of parts and half
> > an hour of your time.
> > No contest.
>
> Have you priced a mechanical timer? Or a CPU based controller?

I don't recall paying more than around $3 for a dead nuke for tranplant purposes.
And a lot of faults are cheap parts like diodes & fuses.


NT

peterw...@gmail.com

unread,
Mar 27, 2019, 8:44:22 AM3/27/19
to
On Tuesday, March 26, 2019 at 4:14:04 PM UTC-4, tabb...@gmail.com wrote:

> A simple nonsequitur. You might not wish to do a minor repair to save $100-400, but some do. And sometimes getting an oven that fits a certain space can be tricky, repairing is then much quicker.

OK - let's cut to the chase:

a) Combination Microwave Ovens are much like BMW cars. Wannabes. As a BMW wannabe a Porsche or Wannabe a Mercedes, but does neither as well, a combination microwave does neither function as well as a dedicated oven. That is not to suggest that a BMW is not a well-made vehicle, but that it is neither a Porsche nor a Mercedes.

b) "For a certain space" - Fitting a function to a specific device has consequences, and in the case of a failure, not good ones. And, for the record, when it comes to a kitchen, aesthetics will ALWAYS defer to function, cleanliness and good light on our house. It is entirely possible to have both, but built-in devices are difficult to service, often difficult to replace quickly - as in on the Wednesday before Thanksgiving, or Christmas Eve.

c) Quicker - sure. If the parts are in hand and/or the problem is simple. If not, I could have a new *insert appliance here* installed in our house within 24 hours at the outside, and if on a non-holiday before 8:00 pm, within 2 hours.

d) Waste and Landfill - metal parts, appliances and such in this region go to Acelor-Mittal in Coatesville, PA, where they are shredded, materials separated, then become new steel in the oldest continuously operating steel mill in the United States - over 206 years.

https://usa.arcelormittal.com/our-operations/steelmaking/coatesville

https://hsp.org/blogs/archival-adventures-in-small-repositories/the-land-of-iron-and-steel

So, at one level, recycling steel reduces the use of energy, mine waste, transportation, coking, smelting and so forth. And. Acelor's shredding plant pulls out the copper, aluminum, glass and plastics as well - all highly automated.

Cursitor Doom

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Mar 27, 2019, 11:54:56 AM3/27/19
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On Tue, 26 Mar 2019 21:16:48 -0500, Fox's Mercantile wrote:

> On 3/26/19 8:43 PM, Cursitor Doom wrote:
>> On Tue, 26 Mar 2019 17:11:09 -0500, Fox's Mercantile wrote:
>>
>>> A cheap microwave for under $30 used.
>>> And a new toaster oven for under $30.
>>>
>>> Any questions?
>>
>> Your *own* microwave back in service for under $3 worth of parts and
>> half an hour of your time.
>> No contest.
>
> Have you priced a mechanical timer? Or a CPU based controller?

Why on earth would I? Only a fuse and a diode failed!

tabb...@gmail.com

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Mar 27, 2019, 12:56:07 PM3/27/19
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On Wednesday, 27 March 2019 12:44:22 UTC, pf...@aol.com wrote:
> On Tuesday, March 26, 2019 at 4:14:04 PM UTC-4, tabby wrote:
>
> > A simple nonsequitur. You might not wish to do a minor repair to save $100-400, but some do. And sometimes getting an oven that fits a certain space can be tricky, repairing is then much quicker.
>
> OK - let's cut to the chase:
>
> a) Combination Microwave Ovens are much like BMW cars. Wannabes. As a BMW wannabe a Porsche or Wannabe a Mercedes, but does neither as well, a combination microwave does neither function as well as a dedicated oven. That is not to suggest that a BMW is not a well-made vehicle, but that it is neither a Porsche nor a Mercedes.

Firstly that's total rubbish. They also do what a separate nuke & oven never can, even if you don't know how they work.
Second, your opinion on other people's appliance buying decisions really has nothing to do with whether they're better repaired or chucked.
3rd there is nowhere here you can go to buy a used combi cooker, they're seldom sold used, so there is no quick cheap availability.


> b) "For a certain space" - Fitting a function to a specific device has consequences, and in the case of a failure, not good ones. And, for the record, when it comes to a kitchen, aesthetics will ALWAYS defer to function, cleanliness and good light on our house. It is entirely possible to have both, but built-in devices are difficult to service, often difficult to replace quickly - as in on the Wednesday before Thanksgiving, or Christmas Eve.

too much waffle, a little nonsense. One of the reasons some buyers get combis is lack of enough space for separate appliances. In those cases they're often fitted appliances, making getting a replacment harder & more expensive than a simple new buy.


> c) Quicker - sure. If the parts are in hand and/or the problem is simple. If not, I could have a new *insert appliance here* installed in our house within 24 hours at the outside, and if on a non-holiday before 8:00 pm, within 2 hours.

again what do your appliance buying policies have to do with others' choices?


> d) Waste and Landfill - metal parts, appliances and such in this region go to Acelor-Mittal in Coatesville, PA, where they are shredded, materials separated, then become new steel in the oldest continuously operating steel mill in the United States - over 206 years.

Guess what, most of the world is not in PA, and most of the world does not run according to US practices.


NT

Fox's Mercantile

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Mar 27, 2019, 4:12:43 PM3/27/19
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On 3/27/19 11:56 AM, tabb...@gmail.com wrote:
> again what do your appliance buying policies have to do with others' choices?

What makes your opinion more valid than his?

Jeff Liebermann

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Mar 27, 2019, 8:36:36 PM3/27/19
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On Tue, 26 Mar 2019 07:25:30 -0700 (PDT), tabb...@gmail.com wrote:

>On Monday, 25 March 2019 20:08:42 UTC, Jeff Liebermann wrote:
>
>> If the microwave oven doesn't kill you, perhaps the popcorn will?
>> "Man shocked to death by exploding microwave"
>> <https://www.news24.com/World/News/man-shocked-to-death-by-exploding-microwave-20181109>
>> Please remember that you have only one life to give to your hobby or
>> profession.

>Which part of a microwave is even capable of explosion?

It's difficult to tell from the article, which offers several
theories. The first paragraph suggests that microwave exploded,
giving him a shock. The fifth paragraph suggests that he was
electrocuted. Forensic investigators are still investigating. The
usual online expert claimed "The high-voltage microwave oven may have
charged something intentionally left inside and caused the explosion"
which I presume means he left a hand grenade in the oven while
preparing the popcorn. Another suggested that he was murdered by his
wife and then blamed the microwave. For all I know, it could have
been the vacuum cleaners fault.

I prefer to believe that he was killed by the popcorn. Popcorn is
normally quite safe prepared in a microwave oven, as long as each
kernel pops at a different time. However, if all the kernels were to
pop at exactly the same time, they might produce a steam explosion.
Statistically, that's very unlikely, but still possible.

This is what happens when I cooked a yam for 16 minutes instead of 6
minutes:
<http://www.learnbydestroying.com/jeffl/pics/drivel/slides/burned-yam.html>
There was no explosion, but there was plenty of fire, smoke, and
stench. When I opened the door, the inside of the yam was glowing
dull red.

Why do microwaves explode?
<https://www.quora.com/Why-do-microwaves-explode>

>And how would said explosion result in electrocution?

Good questions. I don't have an answer. Explosive disassembly
normally disconnects the wires that might present an electrocution
hazard. In this situation, explosive assembly (with burns) is very
unlikely.

--
Jeff Liebermann je...@cruzio.com
150 Felker St #D http://www.LearnByDestroying.com
Santa Cruz CA 95060 http://802.11junk.com
Skype: JeffLiebermann AE6KS 831-336-2558

tabb...@gmail.com

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Mar 27, 2019, 8:49:34 PM3/27/19
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On Wednesday, 27 March 2019 20:12:43 UTC, Fox's Mercantile wrote:
> On 3/27/19 11:56 AM, tabbypurr wrote:

> > again what do your appliance buying policies have to do with others' choices?
>
> What makes your opinion more valid than his?

ookay. I'm done here.

Jeff Liebermann

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Mar 27, 2019, 8:52:12 PM3/27/19
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On Tue, 26 Mar 2019 12:33:45 -0700 (PDT), "pf...@aol.com"
<peterw...@gmail.com> wrote:

>... there is no reason on this planet to attempt to repair
>such a device...

Waving money at me is usually sufficient reason.

I've only repaired a few microwave ovens. Maybe 10 or so. Most of
the repairs were inspired by the owner having purchased a microwave
oven that was built into a kitchen cabinet, RV cabinet, or was in some
way unique (i.e. smart kitchen with remote controls). All of them
were quite old. Amazingly, I was able to find old stock parts, but at
the usual exorbitant prices. I charged far more for the repair than
the cost of a new microwave oven. None of the owners complained about
the price.

Incidentally, one of these oven repairs had a few broken plastic
parts. I had a machine shop make one from my drawings. It was NOT
cheap. Today, I might try a 3D printing service for appliance parts:
<https://3dprint.com/138241/happy-3d-replacement-parts/>
<https://www.yeggi.com/q/appliance+parts/>
etc...

John Robertson

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Mar 27, 2019, 9:14:02 PM3/27/19
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On 2019/03/27 5:36 p.m., Jeff Liebermann wrote:
> On Tue, 26 Mar 2019 07:25:30 -0700 (PDT), tabb...@gmail.com wrote:
>
>> On Monday, 25 March 2019 20:08:42 UTC, Jeff Liebermann wrote:
>>
>>> If the microwave oven doesn't kill you, perhaps the popcorn will?
...
>
> This is what happens when I cooked a yam for 16 minutes instead of 6
> minutes:
> <http://www.learnbydestroying.com/jeffl/pics/drivel/slides/burned-yam.html>
> There was no explosion, but there was plenty of fire, smoke, and
> stench. When I opened the door, the inside of the yam was glowing
> dull red.
>
>

You aren't married, are you Jeff?

If you are then she is a gem if she lets you blow stuff up in the kitchen!

John ;-#)#

Fox's Mercantile

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Mar 27, 2019, 9:16:50 PM3/27/19
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Good.

Jeff Liebermann

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Mar 27, 2019, 10:43:41 PM3/27/19
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On Wed, 27 Mar 2019 18:13:55 -0700, John Robertson <sp...@flippers.com>
wrote:

>On 2019/03/27 5:36 p.m., Jeff Liebermann wrote:
>> On Tue, 26 Mar 2019 07:25:30 -0700 (PDT), tabb...@gmail.com wrote:
>>
>>> On Monday, 25 March 2019 20:08:42 UTC, Jeff Liebermann wrote:
>>>
>>>> If the microwave oven doesn't kill you, perhaps the popcorn will?
>...
>>
>> This is what happens when I cooked a yam for 16 minutes instead of 6
>> minutes:
>> <http://www.learnbydestroying.com/jeffl/pics/drivel/slides/burned-yam.html>
>> There was no explosion, but there was plenty of fire, smoke, and
>> stench. When I opened the door, the inside of the yam was glowing
>> dull red.

>You aren't married, are you Jeff?

Yes, I are not married, and yes, I are Jeff. (Please don't ask a
negative question, and then append a positive question. It's rather
confusing):
<https://theweek.com/articles/451975/problem-positive-answers-negative-questions>

Most of the women I invite to my lair initially look around in silent
shock, and then ask "You live like this"? I've discovered over the
years that this means that they are calculating if it possible to
domesticate me. The answer is usually clear when they discover two
refrigerators in the kitchen. A small one for food, and a larger one
for chemicals, batteries, and emergency supplies. Punching 16 minutes
into the microwave oven timer instead of 6 minutes is a much lesser
crime.

>If you are then she is a gem if she lets you blow stuff up in the kitchen!

It didn't explode. I just shot flaming "guts of yam" all over the
oven walls, filled the kitchen with smoke, set off the smoke alarm,
and smelled rather awful for about a month. The painted (or possibly
powder coated) white interior of the Panasonic inverter oven was badly
stained orange by the yam smoke. None of the common kitchen chemicals
would remove the stains. I decided that toxic chemicals in the
microwave was a bad idea, so I resorted to small right angle buffer
and some abrasive grit. That was sufficient to make the oven
presentable. However, I had to tear it apart to clean the ducting,
where the common kitchen cleaners were functional.

John-Del

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Mar 28, 2019, 8:04:18 AM3/28/19
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On Wednesday, March 27, 2019 at 10:43:41 PM UTC-4, Jeff Liebermann wrote:

>
> >You aren't married, are you Jeff?
>
> Yes, I are not married, and yes, I are Jeff. (Please don't ask a
> negative question, and then append a positive question. It's rather
> confusing):

LOL! You're a twit Jeff, but the kind of twit I love!!

Actually, his statement is far more clumsy when written. When said out-loud, it's not nearly as confusing (although admittedly still incorrect). Said out loud, it might sound like two sentences - one a statement, and the other a question asked after considering the statement part.

Funny stuff though.

John Robertson

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Mar 28, 2019, 12:20:08 PM3/28/19
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Jeeze, I put a comma where it doesn't belong and get a holy !@#$ storm!

(ducking).

Opps!

John ;-#)#
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