Digest for sci.electronics.repair@googlegroups.com - 21 updates in 8 topics

John Robertson <spam@flippers.com>: Sep 27 10:23AM -0700


> This is another one where I look at how it is built and go "Why ?". They got the choppers on a standup car, the transformer on the motherboard and the rectifiers on another standup card. The logical assumption is they intended for service to be able to be performed on a modular level. All fine and good, but a part of me goes "Are you kidding ?".
 
> I can't bitch. I couldn't design the thing at all. But I can go "Huh ?".
 
> Anyway, thanks. And if you catch wind of any "reset" routine for HP stuff let me know. I am going to triple check that there are no blown components, like fuzibes n shit.
 
With everything on sub-boards the first suspects are the card edge
connectors. Take a close look at the sockets to see if the plastic is
breaking down and the body of the edge connector socket is spreading out
at the middle.
 
Of course clean the PCB edge connectors, etc...
 
John :-#)#
 
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JC <Chipbee40_SpamNo@yahoo.com>: Sep 27 03:54PM -0400


> This is another one where I look at how it is built and go "Why ?". They got the choppers on a standup car, the transformer on the motherboard and the rectifiers on another standup card. The logical assumption is they intended for service to be able to be performed on a modular level. All fine and good, but a part of me goes "Are you kidding ?".
 
> I can't bitch. I couldn't design the thing at all. But I can go "Huh ?".
 
> Anyway, thanks. And if you catch wind of any "reset" routine for HP stuff let me know. I am going to triple check that there are no blown components, like fuzibes n shit.
 
There is a lot of info on the 3561A on the Yahoo HP-Agilent_equipment
group including a PSU schematic in the files section. You might want to
sign up with them. A quick read through and there's a lot about flyback
burnup but I'm not familiar with the unit. I can send the PSU schematic
if your email address is valid, size 3MB
Jeff Liebermann <jeffl@cruzio.com>: Sep 27 02:15PM -0700


>Anyway, thanks. And if you catch wind of any "reset" routine for HP stuff let me know. I am going to triple check that there are no blown components, like fuzibes n shit.
 
I couldn't find anything on a "reset" procedure.
Maybe try the operating manual instead of the service manual:
<http://exodus.poly.edu/~kurt/manuals/manuals/HP%20Agilent/HP%203561A%20Operating.pdf>
<http://exodus.poly.edu/~kurt/manuals/manuals/HP%20Agilent/HP%203561A%20Service.pdf>
 
Incidentally, the 7912 regulator is short circuit protected and should
easily recover from a short to ground. It's probably something else
that blew. I would guess(tm) a fuse.
 
--
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
jurb6006@gmail.com: Sep 27 06:13PM -0700

>connectors. Take a close look at the sockets to see if the plastic >is
>breaking down and the body of the edge connector socket is spreading >out
>at the middle."
 
Not this time. I understand what you are saying but in this case that isn't it. I did look at the connectors actually and they are that blue plastic. I KNOW that blue plastic is not stronger or better due to its color but I think they have a tendency to only use that color for really good plastic. Thaat is really only an impression I got, but it is based on real world observations.
 
At any rate, I looked at them pretty good and they are not splitting. And the fact that the new fault came after I sliped with the probe, that ain't it, at least right now.
 
>"Of course clean the PCB edge connectors, etc... "
 
Been wiping the edge down with LPS2 which is really fantastic. Never ever becomes conductive and really does the job better than I thought it should. Someone showed it to me about 35+ years ago and I have been sold ever since. I have never ever used Deoxit, I simply have no need for it.
jurb6006@gmail.com: Sep 27 06:19PM -0700

On Sunday, September 27, 2015 at 2:54:24 PM UTC-5, JC wrote:
> sign up with them. A quick read through and there's a lot about flyback
> burnup but I'm not familiar with the unit. I can send the PSU schematic
> if your email address is valid, size 3MB
 
I would GREATLY appreciate the PSU print. It is JURB six zero zero six at gmail dot com. (numbers are numerals) That would be great so I can see what I have to do to get at least back to where I started. I am starting to think it needs some sort of software reset but that might not be true. No way to tell.
jurb6006@gmail.com: Sep 27 06:31PM -0700

>"Incidentally, the 7912 regulator is short circuit protected and >should
>easily recover from a short to ground. It's probably something else
>that blew. I would guess(tm) a fuse. "
 
Yes, but the center pin is input and I thought it might short the protection diode or something. I am sure something upstream went, unless it is now in software. That worries me because them fuckers could make it so the SMPS will never get drive again unless you buy tool J-1120953A.
 
The file I already had indicates no real hard fuzibles that would go. And I have physically looked. I will look again. I really want an easy solution, like some little one ohm resistor or some shit. It should not be that hard, it was a simple short circuit.
 
Who knows, this may totally overshadow the vertical sweep problem. But this is not something I can just st aside.
JC <Chipbee40_SpamNo@yahoo.com>: Sep 27 10:45PM -0400

>> burnup but I'm not familiar with the unit. I can send the PSU schematic
>> if your email address is valid, size 3MB
 
> I would GREATLY appreciate the PSU print. It is JURB six zero zero six at gmail dot com. (numbers are numerals) That would be great so I can see what I have to do to get at least back to where I started. I am starting to think it needs some sort of software reset but that might not be true. No way to tell.
 
emailed it to you, let me know if you don't receive.
jurb6006@gmail.com: Sep 27 09:43PM -0700

I got it. Thanks.
 
Next, once it is up and running again I got to tackle that vertical circuit. I noticed alot of hash on the output of a 12 volt regulator, not sure if that is the cause of the problem. I don't even know what supplies it runs off of. I did see the vertical drive waveform but I did not note its amplitude. It could have been ten volts or fifty. I wasn't looking for amplitude, I was looking for that little glitch in it. It was there. It indicates an upset for the feedback loop, because of the inability of the circuit to impress the voltage on the (yoke) coil to result in a sawtooth current.
 
We will be getting back to that soon. I will check everything.
JC <Chipbee40_SpamNo@yahoo.com>: Sep 28 10:56AM -0400

> I got it. Thanks.
 
> Next, once it is up and running again I got to tackle that vertical circuit. I noticed alot of hash on the output of a 12 volt regulator, not sure if that is the cause of the problem. I don't even know what supplies it runs off of. I did see the vertical drive waveform but I did not note its amplitude. It could have been ten volts or fifty. I wasn't looking for amplitude, I was looking for that little glitch in it. It was there. It indicates an upset for the feedback loop, because of the inability of the circuit to impress the voltage on the (yoke) coil to result in a sawtooth current.
 
> We will be getting back to that soon. I will check everything.
 
If you want to spend some beans the manual is here for download
 
http://www.qservice.tv/vpasp/shopexd.asp?id=843&bc=no
 
There's a guy here with one, recent blog, maybe you can help each other out.
 
http://jimmyauw.com/2015/03/01/hp-agilent-3561a-dynamic-signal-analyzer/
Phil Hobbs <pcdhSpamMeSenseless@electrooptical.net>: Sep 28 10:42AM -0400

Hi, all,
 
I have one of these nice lead salt vidicon cameras, good from about
700-1900 nm, but it's on the fritz with a blank image. Fiddling with
the +300V adjust pot will make the image appear for a few tenths of a
second, so it looks like the tube's fine and there's some resistor
that's out of spec and offsetting the bias someplace.
 
All the power supplies look fine--apart from the +300, they're all
78xx/79xx regulators, so it's easy to check. I have the user manual,
which talks briefly about all the adjustment pots, but after going
through their abbreviated procedure, it's still flatline.
 
It's all through-hole, so I can probably do OK without a schematic, but
before I spend a day on it, does anybody have a lead on a schematic?
(It's the 7290, not the 7290A.)
 
Sofradir (formerly Electrophysics) hasn't responded to my query.
 
Thanks
 
Phil Hobbs
 
--
Dr Philip C D Hobbs
Principal Consultant
ElectroOptical Innovations LLC
Optics, Electro-optics, Photonics, Analog Electronics
 
160 North State Road #203
Briarcliff Manor NY 10510
 
hobbs at electrooptical dot net
http://electrooptical.net
"Ian Field" <gangprobing.alien@ntlworld.com>: Sep 27 06:23PM +0100

"Michael Black" <et472@ncf.ca> wrote in message
news:alpine.LNX.2.02.1509252309590.22814@darkstar.example.org...
 
> First, all he did was take the innards out of a commercial clock and
> transplant them into his own box. People actually built digital clocks in
> the late sixties and early seventies, wiring up all that TTL
 
Way back then I started one from a design in the back of a Henry's radio
catalogue.
 
The LSI chips turned up before I finished it, a ready made clock was
suddenly such a reasonable price that building one with dozens of SSI TTL
seemed hardly worth it.
 
The board might even still be in a tea chest somewhere at the back of the
garage.
Michael Black <et472@ncf.ca>: Sep 27 01:33PM -0400

John-Del <ohger1s@aol.com>: Sep 27 02:31PM -0700

On Saturday, September 26, 2015 at 12:07:18 PM UTC-4, Don Bruder wrote:
Kinda like the dumbfuck cops trying to defend their mishandling
> of the case by trotting out some moron to explain "Well, we were too
> stupid to actually think, so we ran the kid through the mill to try to
> justify our existence.")
 
Yeah, I'm sure that was the motivation. And btw, that "clock" looked a lot more like a bomb that the Pop-tart bitten into the shape of a gun looked like a weapon. All that "clock" needs is some C-4 and it's a bomb. And do you think the CIA won't inspect that "clock" closely when it arrives at the White House?

> The kid done good.
 
The kid did nothing. He built nothing. Ironically, this is one time Obama could have said "you didn't make that" to anyone and he would have been right.
Oltimer <nup@nup.com>: Sep 28 09:00PM +0800

On 28-Sep-15 1:33 AM, Michael Black wrote:
> if you compare to the general population, there were a few interested in
> high school, we all knew who the other ones were.
 
> Michael
 
I don't doubt the kid likes to tinker & good luck to him.
 
What I don't believe is that his father (check out his history) was
surprised about the response. I still reckon the father facilitated the
response.
 
How good would it be to be a kid today with a real interest in
engineering, science or electronics. Stuff is so cheap and available.
Information is just a click away.
mjb@signal11.invalid (Mike): Sep 28 03:14PM +0100

In article <alpine.LNX.2.02.1509271324290.26622@darkstar.example.org>,
>He follows the Make culture, doing anything, even pasting together
>circuitry sold to people so they don't have to solder, is "Making".
 
The "components" are simultanouesly getting smaller (SMD) and
bigger -- canned modules are a "component" now.
 
>The funny thing is, "Make" has been pushing this, and in their regular
>advertising email, they offered a selection of clocks from their store,
>including one made to look like a bomb.
 
There was an instructable (www.instructables.com) where someone
designed a clock -- rebuilt an existing mains powered clock -- into
a "dynamite stick bundle with wires and red LED" project. It looked
great, but my immediate worry was -- what happens when a cop
sees it? As usual, "oh that's just a theoretical worry, it wouldn't
happen, cops aren't that stupid" etc. responses ...
 
Well, sometimes it does happen! Even an LED/magnet "throwie" chucked
somewhere up under a bridge can trigger an alert. Not through
stupidity, as such, just a bit of paranoia!
--
--------------------------------------+------------------------------------
Mike Brown: mjb[-at-]signal11.org.uk | http://www.signal11.org.uk
 
--- news://freenews.netfront.net/ - complaints: news@netfront.net ---
N_Cook <diverse@tcp.co.uk>: Sep 28 11:41AM +0100

Just in case others find it useful.
http://www.aliexpress.com/wholesale?catId=0&initiative_id=&SearchText=sot-323+marking+24
just requiring style code and marking code in the search box, as easy as
that, for otherwise an awkward 2 digit code.
I suspected it was a digital transistor , so DTC114.
dsi1 <dsi1@fishing.net>: Sep 27 04:48PM -1000

On 9/26/2015 2:58 PM, Ashton Crusher wrote:
> to. It would be funny if there really wasn't very much difference and
> they did this just to get 31.9 mpg instead of 31.2 mpg and 0-60 of
> 12.0 seconds rather then 12.3.
 
My guess is that VW will use a software update rather than spend
thousands on a hardware fix. I think the update should come with a
hundred dollar check and a 2L bottle of Coke - diet or regular as a
jester of goodwill. ;)
 
OTOH, my guess is that a lot of folks will just ignore any fix, if they
can avoid it. The big question is will they be compelled by the state or
feds to do this or will this be be treated as just another recall.
Ashton Crusher <demi@moore.net>: Sep 27 11:01PM -0700


>OTOH, my guess is that a lot of folks will just ignore any fix, if they
>can avoid it. The big question is will they be compelled by the state or
>feds to do this or will this be be treated as just another recall.
 
 
A software fix would be OK if it doesn't wind up overloading the
filter/particle trap every 30 days requiring it to be serviced.
Mike Tomlinson <mike@jasper.org.uk>: Sep 28 05:22AM +0100

En el artículo <mtt0ql$dj1$1@news.eternal-september.org>, ehsjr
 
>Maybe very careful surgery of the old cap, stuff the
>new one inside the hollowed out old one to get the
>old "look"?
 
Posted without comment :)
 
http://www.anonpic.com/images/fakecapacitor1.jpg
 
--
(\_/)
(='.'=) Bunny says: Windows 10? Nein danke!
(")_(")
bv4bv4bv4@gmail.com: Sep 27 12:20PM -0700

The Miracle of Iron
 
 
 
Description: The Quran seems to imply that the iron was something "sent down" and not from this earth, an idea not foreign to 20th century science.
 
Iron is one of the elements highlighted in the Quran. In the chapter known Al-Hadeed, meaning Iron, we are informed:
 
"And We also sent down iron in which there lies great force and which has many uses for mankind..." (Quran 57:25)
 
The word "anzalna," translated as "sent down" and used for iron in the verse, could be thought of having a metaphorical meaning to explain that iron has been given to benefit people. But, when we take into consideration the literal meaning of the word, which is, "being physically sent down from the sky, as this word usage had not been employed in the Quran except literally, like the descending of the rain or revelation, we realize that this verse implies a very significant scientific miracle. Because, modern astronomical findings have disclosed that the iron found in our world has come from giant stars in outer space.[1]
 
Not only the iron on earth, but also the iron in the entire Solar System, comes from outer space, since the temperature in the Sun is inadequate for the formation of iron. The sun has a surface temperature of 6,000 degrees Celsius, and a core temperature of approximately 20 million degrees. Iron can only be produced in much larger stars than the Sun, where the temperature reaches a few hundred million degrees. When the amount of iron exceeds a certain level in a star, the star can no longer accommodate it, and it eventually explodes in what is called a "nova" or a "supernova." These explosions make it possible for iron to be given off into space.[2]
 
One scientific source provides the following information on this subject:
 
"There is also evidence for older supernova events: Enhanced levels of iron-60 in deep-sea sediments have been interpreted as indications that a supernova explosion occurred within 90 light-years of the sun about 5 million years ago. Iron-60 is a radioactive isotope of iron, formed in supernova explosions, which decays with a half life of 1.5 million years. An enhanced presence of this isotope in a geologic layer indicates the recent nucleosynthesis of elements nearby in space and their subsequent transport to the earth (perhaps as part of dust grains)."[3]
 
All this shows that iron did not form on the Earth, but was carried from Supernovas, and was "sent down," as stated in the verse. It is clear that this fact could not have been known in the 7th century, when the Quran was revealed. Nevertheless, this fact is related in the Quran, the Word of God, Who encompasses all things in His infinite knowledge.
 
The fact that the verse specifically mentions iron is quite astounding, considering that these discoveries were made at the end of the 20th century. In his book Nature's Destiny, the well-known microbiologist Michael Denton emphasizes the importance of iron:
 
"Of all the metals there is none more essential to life than iron. It is the accumulation of iron in the center of a star which triggers a supernova explosion and the subsequent scattering of the vital atoms of life throughout the cosmos. It was the drawing by gravity of iron atoms to the center of the primeval earth that generated the heat which caused the initial chemical differentiation of the earth, the outgassing of the early atmosphere, and ultimately the formation of the hydrosphere. It is molten iron in the center of the earth which, acting like a gigantic dynamo, generates the earth's magnetic field, which in turn creates the Van Allen radiation belts that shield the earth's surface from destructive high-energy-penetrating cosmic radiation and preserve the crucial ozone layer from cosmic ray destruction...
 
"Without the iron atom, there would be no carbon-based life in the cosmos; no supernovae, no heating of the primitive earth, no atmosphere or hydrosphere. There would be no protective magnetic field, no Van Allen radiation belts, no ozone layer, no metal to make hemoglobin [in human blood], no metal to tame the reactivity of oxygen, and no oxidative metabolism.
 
"The intriguing and intimate relationship between life and iron, between the red color of blood and the dying of some distant star, not only indicates the relevance of metals to biology but also the biocentricity of the cosmos..."[4]
 
This account clearly indicates the importance of the iron atom. The fact that particular attention is drawn to iron in the Quran also emphasizes the importance of the element.
 
Moreover, iron oxide particles were used in a cancer treatment in recent months and positive developments were observed. A team led by Dr. Andreas Jordan, at the world famous Charité Hospital in Germany, succeeded in destroying cancer cells with this new technique developed for the treatment of cancer--magnetic fluid hyperthermia (high temperature magnetic liquid). As a result of this technique, first performed on the 26-year-old Nikolaus H., no new cancer cells were observed in the patient in the following three months.
 
This method of treatment can be summarized as follows:
 
1. A liquid containing iron oxide particles is injected into the tumour by means of a special syringe. These particles spread throughout the tumour cells. This liquid consists of thousands of millions of particles, 1,000 times smaller than the red blood corpuscles, of iron oxide in 1 cm3 that can easily flow through all blood vessels. [5]
 
2. The patient is then placed in a machine with a powerful magnetic field.
 
3. This magnetic field, applied externally, begins to set the iron particles in the tumour in motion. During this time the temperature in the tumour containing the iron oxide particles rises by up to 45 degrees.
 
4. In a few minutes the cancer cells, unable to protect themselves from the heat, are either weakened or destroyed. The tumour may then be completely eradicated with subsequent chemotherapy.[6]
 
In this treatment it is only the cancer cells that are affected by the magnetic field, since only they contain the iron oxide particles. The spread of this technique is a major development in the treatment of this potentially lethal disease. Iron has also been found to be a cure for people suffering from anemia. In the treatment of such a widespread diseases, the use of the expression "iron in which there lies great force and which has many uses for mankind" (Quran, 57:25) in the Quran is particularly noteworthy. Indeed, in that verse, the Quran may be indicating the benefits of iron even for human health. (God knows best.)
 
 
Footnotes:
[1] Dr. Mazhar U. Kazi, 130 Evident Miracles in the Qur'an (New York, USA: Crescent Publishing House: 1998), 110-111; and www.wamy.co.uk/announcements3.html, from Prof. Zighloul Raghib El-Naggar's speech.
[2] Ibid.
[3] Priscilla Frisch, "The Galactic Environment of the Sun," American Scientist, January-February 2000, www.americanscientist.org/template/AssetDetail/assetid/21173?fulltext=true.
[4] Michael J. Denton, Nature's Destiny (The Free Press: 1998), 198.
[5] www.inm-gmbh.de/cgi-bin/frame/frameloader.pl?sprache=en&url=http://www.inm-gmbh.de/htdocs/technologien/highlights/highlights_en.htm.
[6] "Nanotechnology successfully helps cancer therapies," IIC Fast Track, Nanotech News from Eastern Germany, Industrial Investment Council, October 2003; www.iic.de/uploads/media/NANO_FT_Nov2003_01.pdf
 
http://www.islamreligion.com/articles/562/miracle-of-iron/
 
 
Thank you
bleachbot <bleachbot@httrack.com>: Sep 27 09:20PM +0200

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