sci.electronics.repair - 26 new messages in 9 topics - digest

sci.electronics.repair
http://groups.google.com/group/sci.electronics.repair?hl=en

sci.electronics.repair@googlegroups.com

Today's topics:

==============================================================================
TOPIC: sharp CD loader, tape and radio power problem
http://groups.google.com/group/sci.electronics.repair/t/e0db2f844f71308e?hl=en
==============================================================================

== 1 of 1 ==
Date: Sun, Dec 5 2010 8:34 am
From: Sjouke Burry

fynnashba@yahoo.com wrote:
> a friend of mine plugged his Sharp SD-GX2-s 110 volts AC into 220
> volts. The small standby transformer blew, 2 other diodes also went
> bad. I detected and changed the transformer and the diodes. after
> switching on the power came but quickly the relay cut out with this
> message on the screen (b4 going off) Er MDRO .
> subsequent check shows a short zener diode the number on the board is
> D903. Identifying the part number on the diode is a problem. it reads
> something like 1N141.48 or 1N1418. I have cross check in a data book
> but no help.
> I would be v. glad if someone can help. Thanks
For a test, just remove the zener.
Protection zeners often fail shorted.
As long as yo plug into the right mains voltage,
you can do without the diode during test.
If everything works, measure the voltage, and solder in a zener
of 2-4 volts higher.

==============================================================================
TOPIC: 100v--> 10V Trans. on 120V
http://groups.google.com/group/sci.electronics.repair/t/c8528fdeff78820d?hl=en
==============================================================================

== 1 of 1 ==
Date: Sun, Dec 5 2010 8:37 am
From: Meat Plow

On Sat, 04 Dec 2010 19:05:14 -0800, David Nebenzahl wrote:

> On 12/4/2010 4:36 PM Meat Plow spake thus:
>
>> On Sat, 04 Dec 2010 16:07:47 -0800, David Nebenzahl wrote:
>>
>>> What I perceive
>>
>> Is you being bitch-slapped.
>
> q.e.d.

Looks like things didn't go the way you wanted them huh?

...heh

--
Live Fast, Die Young and Leave a Pretty Corpse

==============================================================================
TOPIC: Question for the group...
http://groups.google.com/group/sci.electronics.repair/t/9de2c59f54ee9292?hl=en
==============================================================================

== 1 of 7 ==
Date: Sun, Dec 5 2010 8:36 am
From: Reinhard Zwirner

Dave schrieb:
> Am working on a waffle iron that doesn't register when power is applied,
> suspecting the solid state relay on the control boad. Question is, who is
> it that has their logo looking like an R with a backwards J up against it?
> Once knew, now can't remember. Would appreiate any help. Part number is
> JH3001, if that helps.

<http://www.ul.com/global/deu/pages/>

HTH

Reinhard

== 2 of 7 ==
Date: Sun, Dec 5 2010 9:17 am
From: "Wild_Bill"

Placing the JH3001 relay type-number into a search engine should result in a
lot of info/datasheets for a small AC relay with a 15A rating.

Any time you request information about an appliance, machine or electronic
device, it's most helpful to you and others, if you include a brand name and
model number of the appliance.
Mentioning where you are in the world may also be helpful, as numerous
devices are manufactured differently for use in different countries.

The relay you saw may just be a common electro-mechanical type, not an SSR.

http://jinhairelay.en.ecplaza.net/7.asp

I'd see if the power cord has continuity, and if not, in some countries a
replaceable fuse is placed in the power cord plug.

--
Cheers,
WB
.............

"Dave" <db5151@hotmail.com> wrote in message
news:-8ednfAI0JghOmbRnZ2dnUVZ_sCdnZ2d@posted.internetamerica...
> Am working on a waffle iron that doesn't register when power is applied,
> suspecting the solid state relay on the control boad. Question is, who is
> it that has their logo looking like an R with a backwards J up against it?
> Once knew, now can't remember. Would appreiate any help. Part number is
> JH3001, if that helps.
>
> Thanks much,
>
> Dave
>
>

== 3 of 7 ==
Date: Sun, Dec 5 2010 9:17 am
From: Smitty Two

In article <idgf1g$135$02$1@news.t-online.com>,
Reinhard Zwirner <reinhard.zwirner@t-online.de> wrote:

> Dave schrieb:
> > Am working on a waffle iron that doesn't register when power is applied,
> > suspecting the solid state relay on the control boad. Question is, who is
> > it that has their logo looking like an R with a backwards J up against it?
> > Once knew, now can't remember. Would appreiate any help. Part number is
> > JH3001, if that helps.
>
> <http://www.ul.com/global/deu/pages/>
>
> HTH
>
> Reinhard

A link to a German version of the UL homepage, with the referenced logo
barely visible in the background? I guess that could help. But if not,
yeah, it's one of Underwriter's Laboratory's logos.

== 4 of 7 ==
Date: Sun, Dec 5 2010 10:03 am
From: "Dave"

"Wild_Bill" <wb_wildbill@XSPAMyahoo.com> wrote in message
news:AOPKo.442276$pX3.424648@en-nntp-11.dc1.easynews.com...
> Placing the JH3001 relay type-number into a search engine should result in
> a lot of info/datasheets for a small AC relay with a 15A rating.
>
> Any time you request information about an appliance, machine or electronic
> device, it's most helpful to you and others, if you include a brand name
> and model number of the appliance.
> Mentioning where you are in the world may also be helpful, as numerous
> devices are manufactured differently for use in different countries.
>
> The relay you saw may just be a common electro-mechanical type, not an
> SSR.
>
> http://jinhairelay.en.ecplaza.net/7.asp
>
> I'd see if the power cord has continuity, and if not, in some countries a
> replaceable fuse is placed in the power cord plug.
>
> --
> Cheers,
> WB
> .............
>
>

Aah. Apologies. I hadn't had my coffee yet, and made more than one
mistake. The brand of the waffle iron is DeLonghi. Model WR25. And the
logo is a backwards R butted up against a forward facing J. And, it is not
a SSR, it appears to be a SS fuse, 15A. Thanks for the advice on finding
it's datasheet. Will definetely check that out. Thanks to the group for
all the replies and help. Will check out the links, too.

Much appreciated...

Dave

> "Dave" <db5151@hotmail.com> wrote in message
> news:-8ednfAI0JghOmbRnZ2dnUVZ_sCdnZ2d@posted.internetamerica...
>> Am working on a waffle iron that doesn't register when power is applied,
>> suspecting the solid state relay on the control boad. Question is, who
>> is it that has their logo looking like an R with a backwards J up against
>> it? Once knew, now can't remember. Would appreiate any help. Part
>> number is JH3001, if that helps.
>>
>> Thanks much,
>>
>> Dave
>>
>>
>

== 5 of 7 ==
Date: Sun, Dec 5 2010 11:46 am
From: JeffM

Wild_Bill wrote:
>include a brand name and model number of the appliance.
>Mentioning where you are in the world may also be helpful,
>
To the OP:
See also the altered Subject line.

== 6 of 7 ==
Date: Sun, Dec 5 2010 12:58 pm
From: greenpjs@neo.rr.com

On Sun, 5 Dec 2010 12:03:03 -0600, "Dave" <db5151@hotmail.com> wrote:

>Aah. Apologies. I hadn't had my coffee yet, and made more than one
>mistake. The brand of the waffle iron is DeLonghi. Model WR25. And the
>logo is a backwards R butted up against a forward facing J. And, it is not
>a SSR, it appears to be a SS fuse, 15A. Thanks for the advice on finding
>it's datasheet. Will definetely check that out. Thanks to the group for
>all the replies and help. Will check out the links, too.
>
>Much appreciated...
>
>Dave
>
As others have mentioned, that logo is the one UL uses on approved
components (as apposed to products where they use "UL" in a circle).
It is not a manufacturer's logo.

== 7 of 7 ==
Date: Sun, Dec 5 2010 1:41 pm
From: Nancy Norelli

On Sun, 5 Dec 2010 08:54:41 -0600, Dave wrote:

> Am working on a waffle iron that doesn't register when power is applied,

Will it fit on my clit?
--
Don't FUCK with me. I'm tuff. And stupid but don't dare FUCK with me.

==============================================================================
TOPIC: common problem with Dell PCs
http://groups.google.com/group/sci.electronics.repair/t/47ad46d2aa2d5bf7?hl=en
==============================================================================

== 1 of 2 ==
Date: Sun, Dec 5 2010 9:00 am
From: "Wild_Bill"

The Optiplex 200 series and numerous other models have a bad reputation
already, so go ahead and call them crap.

You would be wise to begin looking for replacement machines now, as the
remaining models will most likely be failing in various ways, causing
numerous work-related problems as they die.

These products, like most anything manufactured in recent years, are
manufactured with low-cost components, and aren't built to have long
operational lifetimes.

As Baron recommended, the Bad Caps website lists these machines as being one
of the many machines that suffer from electrolytic capacitor failures.

I bought a used 3GHz GX270 a while ago for $40, just to have as a spare
machine, and while looking up specs and motherboard features, I discovered
that this model is also listed as a Bad Caps model.
A short time later, I spotted a fresh refurbished m-bd from Dell for $13 on
eBay. The refurb boards were stocked by Dell as replacement parts for
early-failure Optiplex machines.
I haven't actually put the GX270 to use yet, but I have it for a spare
machine, just in case I'd need one.

One characteristic of the GX270 is that the PSU weighs about 2x more than a
generic PSU of the same output rating.

--
Cheers,
WB
.............

<fynnashba@yahoo.com> wrote in message
news:ebea5c4e-46c4-43b8-99d4-adbbe1a184f3@u25g2000pra.googlegroups.com...
>I have noticed a problem with Dell PCs but b4 I advice my boss I want
> to be sure.
> Almost all our Dell machines (both optiplex 240 and 270) 22 out of 28
> machines are all having problem with the primary IDE. After trying to
> use the secondary IDE it also could not be detected.
> at startup the screen will say primary, secondary IDE not found or
> something like that. For one machine the CD ROM drive was detected but
> when it was unplugged and plugged later the machine could not detect
> it again. Is there a way round it?
> We've had this problem b4 all effort to repair them failed so they
> were discarded.
> I don't want to jump into conclusion as a company's name is at
> stake.
> Thanks.

== 2 of 2 ==
Date: Sun, Dec 5 2010 10:33 am
From: Jeff Liebermann

On Sun, 5 Dec 2010 04:23:08 -0800 (PST), "fynnashba@yahoo.com"
<fynnashba@yahoo.com> wrote:

>I have noticed a problem with Dell PCs but b4 I advice my boss I want
>to be sure.
>Almost all our Dell machines (both optiplex 240 and 270) 22 out of 28
>machines are all having problem with the primary IDE. After trying to
>use the secondary IDE it also could not be detected.
>at startup the screen will say primary, secondary IDE not found or
>something like that. For one machine the CD ROM drive was detected but
>when it was unplugged and plugged later the machine could not detect
>it again. Is there a way round it?
>We've had this problem b4 all effort to repair them failed so they
>were discarded.
>I don't want to jump into conclusion as a company's name is at
>stake.
>Thanks.

<http://www.nytimes.com/2010/06/29/technology/29dell.html?_r=1>
<http://www.zdnet.com/blog/projectfailures/dell-lawsuit-pattern-of-deceit/10165>
<http://dellhellagain.com>
A study by Dell found that OptiPlex computers affected by
the bad capacitors were expected to cause problems up to
97 percent of the time over a three-year period, according
to the lawsuit.

I'll assume you mean Dell Optiplex GX240 and GX270. The various case
size power supplies are a source of problems with these and other Dell
units. In addition, some models have problems with bad capacitors on
the motherboard. I've seen both. However, the symptoms of both
problems do NOT resemble your description. What I see are boot
failures and turn on/off problems before it quits completely. Ignoring
the possible bad caps and bad power supplies, it sounds like you have
a fair collection of bad hard disks and possibly one bad CDROM drive.
With what information you supplied, I can't tell from here. Open the
case, blow out the filth, and look inside at the electrolytic
capacitors surrounding the CPU. If they are bulging or leaking,
there's your problem. Also, try testing with a known good (new) hard
disk to be sure it's not a HD failure epidemic.
<http://www.google.com/images?q=dell+bad+caps>

I often rebuild the motherboards and some power supplies on these
computers. Replacing 15 caps is generally not worth the effort unless
you have the a vacuum desoldering station and a fair replacement parts
collection. Due to variations in PCB hole sizes, some are easy to
replace, while others risk damaging the board. My success rate has
been about 70% which makes repair a risk. Despite all this, I still
buy, resell and use Dell computers. Some are problematic, some should
be avoided, but most seem to hold together quite nicely.

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

==============================================================================
TOPIC: american beer inferier?
http://groups.google.com/group/sci.electronics.repair/t/79cf21563e25cfa2?hl=en
==============================================================================

== 1 of 8 ==
Date: Sun, Dec 5 2010 9:10 am
From: Dave Smith

On 04/12/2010 8:52 PM, Bryan wrote:
>
>>> There are, IMHO, some enjoyable American beers. But they're
>>> smaller brands - some of which are even claimed thb brewed in
>>> accordance with the old German "Purity Law" - as in
>>> http://en.wikipedia.org/wiki/Reinheitsgebot
>>> --
>>> PeteCresswell
>>
>> I rather like to drink Michelob when I'm stateside, but do I recall someone
>> telling me that's actually a Canadian beer ?
>
> No. It's as American as it gets. For commercial, watery, fairly
> tasteless beer, it's the best of the bunch. It's great for canoeing/
> kayaking because you can get it in cans.

It is sex in a canoe beer.... fucking near water.

== 2 of 8 ==
Date: Sun, Dec 5 2010 9:53 am
From: PlainBill47@yawho.com

On Sat, 4 Dec 2010 13:34:49 -0800 (PST), "Peter Lucas (SAS RET)"
<psyop@lawyer.com> wrote:

>What do Urine and american Beer have in common?
>They both taste the same going in and comming out!!
So you've being extensive comparisons?

PlainBill

== 3 of 8 ==
Date: Sun, Dec 5 2010 11:48 am
From: "Lumpy"

PlainBill47@yawho.com wrote:

> So you've being extensive comparisons?

All of our extensive comparison beings are belongs to us.

Lumpy

You were on CHiPs? Did you wear those sexy
tight pants and high boots like Erik Estrada?
No. Swimtrunks.
www.LumpyMusic.com

== 4 of 8 ==
Date: Sun, Dec 5 2010 12:19 pm
From: Christopher Helms

On Dec 5, 6:22 am, "N_Cook" <dive...@tcp.co.uk> wrote:
> Christopher Helms <Chrishelms...@yahoo.com> wrote in message
>
> news:21d7ea96-b70c-4294-bcc3-eef49ec8265b@m20g2000prc.googlegroups.com...
> On Dec 4, 7:03 pm, "(PeteCresswell)" <x...@y.Invalid> wrote:
>
> > Per Peter Lucas (SAS RET):
>
> > >What do Urine and american Beer have in common?
> > >They both taste the same going in and comming out!!
>
> > The German side of my family refers to our beer as "Pisswasser".
>
> > Bad rap as far as I'm concerned bc the most noticeable fault of
> > American beers like Bud and Coors is the *lack* of taste - piss
> > or otherwise.
>
> We Americans like our beer mediocre. At the end of Prohibition there
> were something like 700 commercial breweries operating in the US.
> Today if you don't count the micros, there are what? Three big
> nationals? Anheuser Busch, Coors and Miller and they are owned by huge
> conglomerates. There are a few medium sized regional brewers like
> Linenkugel and Yuengling still around, but I don't know if they're
> still independent or not. We Americans don't really do beer anymore.
> Or anything else, for that matter.
>
> &&&&&&
>
> The beer in the Simpsons is Duff, is that a joke for the Brits or does the
> word duff in the USA have the same meaning

In the US it's usually used to refer to ones bottom, as in "Why don't
you get off your duff and go find a job?" There's a guy named Duff who
is or was in the band Guns & Roses at one time, and there was a woman
named Duff on MTv back in the 90's, but those are the only non
Simpsons duffs I can think of right now.

== 5 of 8 ==
Date: Sun, Dec 5 2010 1:15 pm
From: "N_Cook"

Christopher Helms <Chrishelms132@yahoo.com> wrote in message
news:ac0aaa04-9121-4546-abc0-59226af39275@y19g2000prb.googlegroups.com...
On Dec 5, 6:22 am, "N_Cook" <dive...@tcp.co.uk> wrote:
> Christopher Helms <Chrishelms...@yahoo.com> wrote in message
>
> news:21d7ea96-b70c-4294-bcc3-eef49ec8265b@m20g2000prc.googlegroups.com...
> On Dec 4, 7:03 pm, "(PeteCresswell)" <x...@y.Invalid> wrote:
>
> > Per Peter Lucas (SAS RET):
>
> > >What do Urine and american Beer have in common?
> > >They both taste the same going in and comming out!!
>
> > The German side of my family refers to our beer as "Pisswasser".
>
> > Bad rap as far as I'm concerned bc the most noticeable fault of
> > American beers like Bud and Coors is the *lack* of taste - piss
> > or otherwise.
>
> We Americans like our beer mediocre. At the end of Prohibition there
> were something like 700 commercial breweries operating in the US.
> Today if you don't count the micros, there are what? Three big
> nationals? Anheuser Busch, Coors and Miller and they are owned by huge
> conglomerates. There are a few medium sized regional brewers like
> Linenkugel and Yuengling still around, but I don't know if they're
> still independent or not. We Americans don't really do beer anymore.
> Or anything else, for that matter.
>
> &&&&&&
>
> The beer in the Simpsons is Duff, is that a joke for the Brits or does the
> word duff in the USA have the same meaning

&&&&&

Duff in the UK can mean anything between inferior to outright broken . ie a
duff amplifier is no longer working and oddly maybe marked U/S by someone
checking such things. U/S being services speak for un-serviceable. Perhaps
at the same sort of time fanny as a word changed meaning as it was
associated with the F.A.N.Y (Female Auxilliary Nursing Yeomanry) in WW2

== 6 of 8 ==
Date: Sun, Dec 5 2010 1:18 pm
From: Ron

On 05/12/2010 21:15, N_Cook wrote:
> Christopher Helms<Chrishelms132@yahoo.com> wrote in message
> news:ac0aaa04-9121-4546-abc0-59226af39275@y19g2000prb.googlegroups.com...
> On Dec 5, 6:22 am, "N_Cook"<dive...@tcp.co.uk> wrote:
>> Christopher Helms<Chrishelms...@yahoo.com> wrote in message
>>
>> news:21d7ea96-b70c-4294-bcc3-eef49ec8265b@m20g2000prc.googlegroups.com...
>> On Dec 4, 7:03 pm, "(PeteCresswell)"<x...@y.Invalid> wrote:
>>
>>> Per Peter Lucas (SAS RET):
>>
>>>> What do Urine and american Beer have in common?
>>>> They both taste the same going in and comming out!!
>>
>>> The German side of my family refers to our beer as "Pisswasser".
>>
>>> Bad rap as far as I'm concerned bc the most noticeable fault of
>>> American beers like Bud and Coors is the *lack* of taste - piss
>>> or otherwise.
>>
>> We Americans like our beer mediocre. At the end of Prohibition there
>> were something like 700 commercial breweries operating in the US.
>> Today if you don't count the micros, there are what? Three big
>> nationals? Anheuser Busch, Coors and Miller and they are owned by huge
>> conglomerates. There are a few medium sized regional brewers like
>> Linenkugel and Yuengling still around, but I don't know if they're
>> still independent or not. We Americans don't really do beer anymore.
>> Or anything else, for that matter.
>>
>> &&&&&&
>>
>> The beer in the Simpsons is Duff, is that a joke for the Brits or does the
>> word duff in the USA have the same meaning
>
>
> In the US it's usually used to refer to ones bottom, as in "Why don't
> you get off your duff and go find a job?" There's a guy named Duff who
> is or was in the band Guns& Roses at one time, and there was a woman
> named Duff on MTv back in the 90's, but those are the only non
> Simpsons duffs I can think of right now.
>
> &&&&&
>
> Duff in the UK can mean anything between inferior to outright broken . ie a
> duff amplifier is no longer working and oddly maybe marked U/S by someone
> checking such things. U/S being services speak for un-serviceable. Perhaps
> at the same sort of time fanny as a word changed meaning as it was
> associated with the F.A.N.Y (Female Auxilliary Nursing Yeomanry) in WW2
>
>

see 'Fanny Hill' by John Cleland.
In some areas in the mid 18th century, prostitutes were known as Fannys

Ron

== 7 of 8 ==
Date: Sun, Dec 5 2010 2:05 pm
From: Yasser Butterfat

Seems you haven't had any Double Bastard from Stonebrew? The stuff is so
good it will put hair on your ass, have you sweating like a terrorist at
a bomb belt making seminar, and have you crepitating like a Croation
sniper, silent and deadly.

http://www.arrogantbastard.com/doublebastard/

On Sun, 05 Dec 2010 12:19:07 -0800, Christopher Helms wrote:

> On Dec 5, 6:22 am, "N_Cook" <dive...@tcp.co.uk> wrote:
>> Christopher Helms <Chrishelms...@yahoo.com> wrote in message
>>
>> news:21d7ea96-b70c-4294-bcc3-
eef49ec8265b@m20g2000prc.googlegroups.com...
>> On Dec 4, 7:03 pm, "(PeteCresswell)" <x...@y.Invalid> wrote:
>>
>> > Per Peter Lucas (SAS RET):
>>
>> > >What do Urine and american Beer have in common? They both taste the
>> > >same going in and comming out!!
>>
>> > The German side of my family refers to our beer as "Pisswasser".
>>
>> > Bad rap as far as I'm concerned bc the most noticeable fault of
>> > American beers like Bud and Coors is the *lack* of taste - piss or
>> > otherwise.
>>
>> We Americans like our beer mediocre. At the end of Prohibition there
>> were something like 700 commercial breweries operating in the US. Today
>> if you don't count the micros, there are what? Three big nationals?
>> Anheuser Busch, Coors and Miller and they are owned by huge
>> conglomerates. There are a few medium sized regional brewers like
>> Linenkugel and Yuengling still around, but I don't know if they're
>> still independent or not. We Americans don't really do beer anymore. Or
>> anything else, for that matter.
>>
>> &&&&&&
>>
>> The beer in the Simpsons is Duff, is that a joke for the Brits or does
>> the word duff in the USA have the same meaning
>
>
> In the US it's usually used to refer to ones bottom, as in "Why don't
> you get off your duff and go find a job?" There's a guy named Duff who
> is or was in the band Guns & Roses at one time, and there was a woman
> named Duff on MTv back in the 90's, but those are the only non Simpsons
> duffs I can think of right now.

== 8 of 8 ==
Date: Sun, Dec 5 2010 2:05 pm
From: "Charles"

"Peter Lucas (SAS RET)" wrote in message
news:2dfc8571-5943-46b9-ae4b-3bb902d7e431@d24g2000prj.googlegroups.com...

What do Urine and american Beer have in common?
They both taste the same going in and comming out!!

Some American draught beers are really tasty.

American bottled beer tends to be just beer. Drinkable, if you are thirsty.
There are a few notable exceptions.

http://www.hopsaficionado.com/

==============================================================================
TOPIC: PSU voltage instability
http://groups.google.com/group/sci.electronics.repair/t/640c794886b1e24f?hl=en
==============================================================================

== 1 of 4 ==
Date: Sun, Dec 5 2010 10:09 am
From: Jeff Liebermann

On Sun, 5 Dec 2010 19:28:39 +1100, "Phil Allison" <phil_a@tpg.com.au>
wrote:

>>>The LINEARITY of most DMMs is of a very high order - 1 part in 1000 is
>>>typical.
>>
>> Linearity is usually +/- 1 bit or LSB. If it's a 3 1/2 digit cheapo
>> DVM, with a full scale reading of 1999, it probably has 10 bit A/D
>> converter.

> Regular DMMS do not use conventional A-D converters.
> They use "dual slope integration " - ie an analogue technique.
> The "digital" bit is the fucking display.

Thanks. I didn't know that. The DVM's I play with all have SAR
(successive approximation register) type A/D converters, which suffer
from missing code linearity problems. Under ideal circumstances, the
minimum is the display uncertainty of 1 LSB.

Microchip. Analog-to-Digital Converter Design Guide
<http://ww1.microchip.com/downloads/en/devicedoc/21841a.pdf>

> The same meter is used and so the only error is the +/-1 bit display
>uncertainty.

That's also the linearity if everything else were perfect. Reading
between the lines of your copious insults, you seem to be referring to
"analog linearity", which does not include the digital conversion
part. Assuming the integrating capacitor doesn't have a dielectric
absorption problem, the analog section is quite linear.

Unfortunately, you completely missed my point. If you make two
voltage measurements with the same meter, and there was some
non-linearity error, and the two measurements were fairly close
together, then (as you mentioned) any errors in the difference of
these two measurements would probably cancel. That's fine and I have
no problem with that.

If you use either voltage measurement, to determine if the output of
the power supply is within specification (Per ATX 2.2), then the not
so minor problem of absolute accuracy, something you seem to be
ignoring, is important. DMM's are speced at +/-1% or less, so it's
not a huge error when compared to the +/-5% power supply error.
However it does become important when measuring near the power supply
limits.

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

== 2 of 4 ==
Date: Sun, Dec 5 2010 11:51 am
From: "Phil Allison"

"Jeff Liebermann = a lying AUTISTIC ASSHOLE "

** Drop dead you pathetic fuckwit.

..... Phil

== 3 of 4 ==
Date: Sun, Dec 5 2010 1:07 pm
From: David Nebenzahl

On 12/5/2010 11:51 AM Phil Allison spake thus:

> "Jeff Liebermann = a lying AUTISTIC ASSHOLE "
>
> ** Drop dead you pathetic fuckwit.

OK, so my guess is, oh, another week or so before Phil posts a calm,
reasonable (and correct) message here.

Guess it takes that long for the meds to take effect ...

--
How To Access Wikileaks

These sites are still up as of 12/3/10:

http://wikileaks.de
http://wikileaks.fi
http://wikileaks.nl
http://wikileaks.eu
http://wikileaks.pl

And these IP addresses can be used:

http://213.251.145.96/
http://88.80.13.160/

== 4 of 4 ==
Date: Sun, Dec 5 2010 1:12 pm
From: "Phil Allison"

"David Nebenzahl is Donkey Brained Troll "
>
>
>> "Jeff Liebermann = a lying AUTISTIC ASSHOLE "
>>
>> ** Drop dead you pathetic fuckwit.
>
> OK, so my guess is, oh, another week or so before Phil posts a calm,
> reasonable (and correct) message here.

** Shame is pal, EVERY SINGLE TIME I do just that - a bunch of
fucking, autistic RETARDS like YOU come along afterwards and try to piss on
it.

Same all over damn usenet -

nothing but FUCKING TROLLS !!!!!!!!!!!

.... Phil

==============================================================================
TOPIC: InovaBrasil
http://groups.google.com/group/sci.electronics.repair/t/0ae7f456c4c738f7?hl=en
==============================================================================

== 1 of 1 ==
Date: Sun, Dec 5 2010 11:17 am
From: Rogerio

As mais lidas da semana em http://inovabrasil.blogspot.com

1. CNPq: edital voltado para área de software e TI
2. Alta frequência de estresse pós-traumático em mulheres que
receberam diagnóstico de câncer
3. Simpósio de Avaliação dos Impactos da Lei de Informática na
Indústria e do Cenário Atual do Setor de Tecnologia da Informação
4. Inaugurada em Brasilia a Embrapa Agroenergia
5. MEI: versão diferenciada para o interior do país
6. ES: Programa Nossa Bolsa - inscrições abertas
7. FNDE: estabelecidas as diretrizes para o Prêmio Professores do
Brasil
8. Lançado o Portal BHL ScieLO sobre a biodiversidade brasileira
9. Prêmio Finep: Cesar vence na categoria Instituição de Ciência e
Tecnologia
10. Tecpar recebe acreditação do Inmetro em ensaios
11. CCTCI: emendas aumentam o orçamento do MCT
12. Paraguay, Brasil y Argentina firmaron acuerdo para manejo
sostenible de los ríos Paraná y Paraguay
13. Redução de CO2 de São Paulo pede novas rotas tecnológicas
14. Relatório Unesco sobre Ciência 2010
15. Retep interliga VTs e CTs de Pernambuco
16. CERTI: Brasil desenvolverá tecnologia OLED
17. Fundação Araucária: bolsas de pós-doutorado
18. IB-USP: criadas linhagens de camundongos geneticamente
modificados que reproduzem a variabilidade clínica da Síndrome de
Marfan
19. MCT: Portaria dispõe sobre processo de seleção de monitores-
bolsistas de telecentros
20. Portaria 977: simplificada a importação de bens destinados à
pesquisa científica e tecnológica
21. Software identifica genes que podem ser alvos potenciais de
terapias para o tratamento de doenças e pode ser aplicado também em
redes sociais
22. Unesp: pós-doutorado em biofísica molecular

InovaBrasil - Assinaturas : inovabrasil.assina@gmail.com
Twitter: @Inovabrasil2010

==============================================================================
TOPIC: Crown Fan Heater
http://groups.google.com/group/sci.electronics.repair/t/1558327974416cb8?hl=en
==============================================================================

== 1 of 1 ==
Date: Sun, Dec 5 2010 9:27 am
From: M.Joshi

I am attempting to repair a Crown branded fan heater. The thermal fuse
has blown.

What is likely to have caused the thermal fuse to blow - failure of the
mechanical cut-out?

There are three cut-out outs. One is the thermostat, the second is the
mechanical one just above the heater elements and the third is the
thermal fuse also above the heater elements.

Thanks.

--
M.Joshi

==============================================================================
TOPIC: Repair Sinclair DM235 DMM
http://groups.google.com/group/sci.electronics.repair/t/d1af8be96ee048ed?hl=en
==============================================================================

== 1 of 1 ==
Date: Sun, Dec 5 2010 1:28 pm
From: Reinhard Zwirner

Hi,

Can somebody please give me a hint where to find a circuit diagram or a
service manual for an old Sinclair DM 235 DMM (for free)? When switched
on only one digit is active displaying a random number. Additionally I'm
searching for a datasheet of AY-5-3507 display driver (?).

Any help is really appreciated.

Best regards

Reinhard

==============================================================================

You received this message because you are subscribed to the Google Groups "sci.electronics.repair"
group.

To post to this group, visit http://groups.google.com/group/sci.electronics.repair?hl=en

To unsubscribe from this group, send email to sci.electronics.repair+unsubscribe@googlegroups.com

To change the way you get mail from this group, visit:
http://groups.google.com/group/sci.electronics.repair/subscribe?hl=en

To report abuse, send email explaining the problem to abuse@googlegroups.com

==============================================================================
Google Groups: http://groups.google.com/?hl=en

Electronics

sci.electronics.repair - 26 new messages in 9 topics - digest

No Response to "sci.electronics.repair - 26 new messages in 9 topics - digest"

Post a Comment

Blog Roll

Blog Archive