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Jeff Liebermann <jeffl@cruzio.com>: Dec 15 05:47PM -0800 On Tue, 15 Dec 2015 07:37:42 -0800, John Robertson <spam@flippers.com> wrote:   >troubleshooting time. It is true that perhaps 60% of the caps replaced >are fine, but the rest are marginal at best and make all sorts of errors >creep in that would take hours to find otherwise.   <http://802.11junk.com/jeffl/pics/repair/slides/bad-caps.html> I also do pre-emptive replacements on caps. Worse, if I find a cap that is bulging or fails an ESR test, I replace *ALL* the caps that are the same brand and value. Also, if I find a string of parallel caps, and one is bad, I automatically assume that all of them are either bad, or will soon fail. That may seem extreme, but I spend more time extracting and replacing motherboards boards than I do fixing them. It's easier and cheaper to replace everything that is suspicious, than to deal with returns, rework, complaining customers, reputation issues, etc. If the customer returns with the same problem, but from a different cap, I have to do the rework for free, which wipes all my profit from the initial repair. Do it right and do it all the first time.   However, it also helps to pay attention. Do you see a problem here? <http://802.11junk.com/jeffl/crud/GX520-bad-caps.jpg>     -- 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

Sjouke Burry <burrynulnulfour@ppllaanneett.nnll>: Dec 16 03:27AM +0100 On 16.12.15 2:47, Jeff Liebermann wrote: > it all the first time.   > However, it also helps to pay attention. Do you see a problem here? > <http://802.11junk.com/jeffl/crud/GX520-bad-caps.jpg>   A blue one with a headache.

Jeff Liebermann <jeffl@cruzio.com>: Dec 15 06:43PM -0800 On Wed, 16 Dec 2015 03:27:36 +0100, Sjouke Burry   >> However, it also helps to pay attention. Do you see a problem here? >> <http://802.11junk.com/jeffl/crud/GX520-bad-caps.jpg>   >A blue one with a headache.   The "bad-caps" is in the URL, so that's rather obvious. However, that's the result, not the problem. The cause is quite obvious once you see it. I posted the picture previously and Phil Allison caught the problem almost instantly. I didn't.       -- 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

Allodoxaphobia <knock_yourself_out@example.net>: Dec 16 03:21AM On Tue, 15 Dec 2015 17:47:13 -0800, Jeff Liebermann wrote:   > However, it also helps to pay attention. Do you see a problem here? > <http://802.11junk.com/jeffl/crud/GX520-bad-caps.jpg>   Either the (out of focus) black capacitors are installed backwards or the board is mis-labled with the "+" signs.   Jonesy -- Marvin L Jones | Marvin | W3DHJ.net | linux 38.238N 104.547W | @ jonz.net | Jonesy | FreeBSD * Killfiling google & XXXXbanter.com: jonz.net/ng.htm

Jeff Liebermann <jeffl@cruzio.com>: Dec 15 08:08PM -0800 On 16 Dec 2015 03:21:01 GMT, Allodoxaphobia   >Either the (out of focus) black capacitors are installed backwards >or the board is mis-labled with the "+" signs. >Jonesy   Yep, you got it. Electrolytic capacitors are identified by a wide stripe on the negative end. To make it easy to hand insert electrolytics, the PCB is usually silk screen with a wide white area around the corresponding negative wire. Usually, except for this find Dell motherboard, that marks the positive lead instead with a wide white area. To their credit, they added "+" marks, which I missed. Having replace plenty caps on boards where the negative terminal is marked, I didn't think to look for the "+" sign, and so installed it backwards. The computer actually ran for a day or so, before it started acting funny and blew the tops open. I initially thought I had a batch of bad caps, so I replaced them a 2nd time, inserting them backwards again. I knew I was in trouble when the caps got rather warm. In desperation, I posted the photo to this newsgroup and got an instant response. Only then did I notice that the PCB silk screen markings were backwards.   Like I said, it pays to pay attention when re-capping.       -- 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

"Michael A. Terrell" <mike.terrell@earthlink.net>: Dec 16 12:15AM -0500 Jeff Liebermann wrote:   > However, it also helps to pay attention. Do you see a problem here? > ?http://802.11junk.com/jeffl/crud/GX520-bad-caps.jpg?     85C?

"Ralph Mowery" <rmowery28146@earthlink.net>: Dec 15 10:52AM -0500 "John Robertson" <spam@flippers.com> wrote in message news:v72dnRqUANBaru3LnZ2dnUU7-V-dnZ2d@giganews.com... > troubleshooting time. It is true that perhaps 60% of the caps replaced are > fine, but the rest are marginal at best and make all sorts of errors creep > in that would take hours to find otherwise.   It all depends on the cost and how much later down time you want to take a chance on.   At work we had a 200 HP motor drive control that quit and we called in a factory repair man. He determined that 2 large diodes ( arund 600 volt and 100 amp or so) were bad. AS this was a 3 phase unit , there were 3 diodes. I told him to replace the 3 rd one as it may have had some stress on it and may fail later. He said he would but it was $ 50 for the diode. I told him that at what we were paying him and the ammount of production it would cost that $ 50 was nothing worth even thinking about.

John Robertson <spam@flippers.com>: Dec 15 11:12PM -0800 On 12/15/2015 6:43 PM, Jeff Liebermann wrote: > that's the result, not the problem. The cause is quite obvious once > you see it. I posted the picture previously and Phil Allison caught > the problem almost instantly. I didn't.   Do you mean where someone mixed 85C caps (that failed) with 105C caps, that look OK?   John :-#)#   -- (Please post followups or tech inquiries to the USENET newsgroup) John's Jukes Ltd. 2343 Main St., Vancouver, BC, Canada V5T 3C9 (604)872-5757 or Fax 872-2010 (Pinballs, Jukes, Video Games) www.flippers.com "Old pinballers never die, they just flip out."

John Robertson <spam@flippers.com>: Dec 15 11:13PM -0800 On 12/15/2015 8:08 PM, Jeff Liebermann wrote: > instant response. Only then did I notice that the PCB silk screen > markings were backwards.   > Like I said, it pays to pay attention when re-capping.   Oh...that was too obvious. Missed it!   John :-#(#   -- (Please post followups or tech inquiries to the USENET newsgroup) John's Jukes Ltd. 2343 Main St., Vancouver, BC, Canada V5T 3C9 (604)872-5757 or Fax 872-2010 (Pinballs, Jukes, Video Games) www.flippers.com "Old pinballers never die, they just flip out."

thekmanrocks@gmail.com: Dec 15 05:21PM -0800 Ralph Mowery wrote: " "Jeff Liebermann" <je...@cruzio.com> wrote in message news:kf717bp4p5j377q45i5t8qvfq51q500cj7@4ax.com... > and they then act normally. It's probably read errors on the hard > disk, but SMART shows nothing interesting. At this time, I boot to > the BIOS screen, wait about 10-15 mins, and then boot normally.   If I got out of bed and it was 45 F, I would be looking into the heating system first. I don't function when it is that cold.   Sounds like you may want to look into a solid state drive for the computer so it will start up cold. "     If I got out of bed and it was that cold, I would be looking into some INSULATION first! Something 'Murricans seem to be averse to, even after decades of evidence in favor of it.

"Michael A. Terrell" <mike.terrell@earthlink.net>: Dec 15 08:29PM -0500 > into some INSULATION first! Something 'Murricans seem > to be averse to, even after decades of evidence in favor > of it.     I've woken up to -40F, during survival training.   I've installed more fiberglass batts than I care to think about, starting in the early '60s.

thekmanrocks@gmail.com: Dec 15 05:35PM -0800 8:29 PMMichael Terrell wrote: "- show quoted text - I've woken up to -40F, during survival training.   I've installed more fiberglass batts than I care to think about, starting in the early '60s. "   Then you must almost never turn your heat on.   'Murricans, thinking they all tough by never using heat in the winter...

Jeff Liebermann <jeffl@cruzio.com>: Dec 15 06:05PM -0800 On Tue, 15 Dec 2015 17:21:14 -0800 (PST), thekmanrocks@gmail.com wrote:   >If I got out of bed and it was 45 F, I would be looking into the heating >system first. I don't function when it is that cold.   <http://802.11junk.com/jeffl/pics/home/slides/wood-burner.html> <http://802.11junk.com/jeffl/pics/home/slides/firewood-2015.html>   Below about 45F, I have problems working, especially when I'm walking around the house in pajamas and no shoes. I do it often and it doesn't bother me much. However, that requires that I keep moving, which is often difficult in front to the computah. So, I fire up the wood burner and run the temperature up to 60 to 70F.   >Sounds like you may want to look into a solid state drive for the computer >so it will start up cold. "   An SSD is in the works. The problem is that every time I buy one for myself, some customer arrives and needs it more. Since prices are dropping, I don't mind delaying my SSD upgrade. However, for the present situation, I'm looking into an adjustable cat or dog warming electric blanket. I had a mysterious data corruption problem about a month ago, when it began to become cold, that was probably due to the startup problem. I recovered fairly easily, but it burned too much time.   >into some INSULATION first! Something 'Murricans seem >to be averse to, even after decades of evidence in favor >of it.   This is not a conventional house: <http://802.11junk.com/jeffl/pics/home/slides/BL-house3.html> Insulation is possible, but there are other priorities that come first. Eventually, I'll need to build up the roof, which is where insulation will do the most good. One of my neighbors did that to their house that was similarly built, and it worked very well.   -- 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

"Michael A. Terrell" <mike.terrell@earthlink.net>: Dec 16 12:12AM -0500 > Then you must almost never turn your heat on.   > 'Murricans, thinking they all tough by never > using heat in the winter...     No, but then I live in Florida. :)   I have a 1000W electric heater, for the rare times that it is in the 30s for several days in a row.

"Michael A. Terrell" <mike.terrell@earthlink.net>: Dec 15 07:03PM -0500 John-Del wrote:   > This has an ESMT logo and F25L32QA on one line and D301W on another. Googling only returns hits for programmers that can read and write to it, but no place to buy and no info for a sub. Anybody have any ideas? Even Alibaba returns zero hits (odd).     Have you tried looking at the base part number, 25L32? It appears to be an old 32K EPROM that was made by a lot of companies, an is likely out of production. Is this like what you are looking for?   http://www.ebay.com/itm/321330554965

John-Del <ohger1s@aol.com>: Dec 15 04:54PM -0800 On Tuesday, December 15, 2015 at 7:03:17 PM UTC-5, Michael Terrell wrote: > be an old 32K EPROM that was made by a lot of companies, an is likely > out of production. Is this like what you are looking for?   > http://www.ebay.com/itm/321330554965     No, it's a current production eeprom that you find in typical "Black Friday" grade TVs (this is a Funai-Emerson). Looks like this:   http://www.people.com/article/star-trek-actress-karen-montgomery-dead?utm_source=zergnet.com&utm_medium=referral&utm_campaign=zergnet_805415&xid=partner_zergnet   I have an email out to Funai Corp to see if they sell the eeprom; most TV manufacturers won't sell parts, just complete boards.   I had the same model in a couple of months ago for repair and copied the image file in case I ever needed it (I do now), but the eeprom in this particular main board won't take a reprogramming as many do if they're just corrupted. If I can find the eeprom or a sub, I can load it and finish the job.

"Michael A. Terrell" <mike.terrell@earthlink.net>: Dec 15 08:26PM -0500 John-Del wrote:   > http://www.people.com/article/star-trek-actress-karen-montgomery-dead?utm_source=zergnet.com&utm_medium=referral&utm_campaign=zergnet_805415&xid=partner_zergnet   > I have an email out to Funai Corp to see if they sell the eeprom; most TV manufacturers won't sell parts, just complete boards.   > I had the same model in a couple of months ago for repair and copied the image file in case I ever needed it (I do now), but the eeprom in this particular main board won't take a reprogramming as many do if they're just corrupted. If I can find the eeprom or a sub, I can load it and finish the job.       Then it is an 8 or 16 pin SPI interface, instead of parallel? There are a lot of those out in the wild, as well. DIgikey has both of those styles, in the one dollar price range.     <http://www.digikey.com/product-search/en/integrated-circuits-ics/memory/2556980?k=25L32>

"Michael A. Terrell" <mike.terrell@earthlink.net>: Dec 15 02:22PM -0500 > me violently ill.   > Holy horse-feathers we're lighting that candle from > opposite ends: I positively DRINK the stuff, LOL!     Good. Buy it buy the gallon, and guzzle it. I had to use white vinegar to clean a wound last year. Nine months in Wound Care. It was all I could do to wipe away the dead skin, while holding my breath.

thekmanrocks@gmail.com: Dec 15 11:28AM -0800 Michael Terrell wrote: "- show quoted text - Good. Buy it buy the gallon, and guzzle it. I had to use white vinegar to clean a wound last year. Nine months in Wound Care. It was all I could do to wipe away the dead skin, while holding my breath. "     Wait.. what?

"Michael A. Terrell" <mike.terrell@earthlink.net>: Dec 15 02:36PM -0500 > to clean a wound last year. Nine months in Wound Care. It was all I > could do to wipe away the dead skin, while holding my breath. "   > Wait.. what?   What part don't you understand? Telling you to drink the stuff, or being in wound care for some deep ulcerated wounds on my leg?

thekmanrocks@gmail.com: Dec 15 11:45AM -0800 2:36 PM Michael Terrell wrote: "- show quoted text - What part don't you understand? Telling you to drink the stuff, or being in wound care for some deep ulcerated wounds on my leg? "     I interpreted the second part as: consuming ketchup landed you in the hospital, and I was quizzical as to how that could have happened. LOL     The leg wound part cleared things up. Guess you just have an aversion to vinegar, in any form.

"Michael A. Terrell" <mike.terrell@earthlink.net>: Dec 15 07:14PM -0500 > The leg wound part cleared things up. Guess > you just have an aversion to vinegar, in any > form.     I had a so called 'friend' hold out a bag of potato chips, but I couldn't see the label. He was laughing as I was gasping for breath, because they were full of vinegar. I didn't even have to swallow them to be sick for three days. I have to avoid all condiments on food, because most have vinegar in them. I cook my own food, so that I can make sure there is no vinegar in it.

thekmanrocks@gmail.com: Dec 15 04:32PM -0800 Michael Terrell:   Horrors! I apologize for not appreciating how serious your allergy really is. I have a likewise averse reaction to simple house dust, due to circumstances during my youth I'd rather not go into. Simply put, one speck of dust, one stray hair, and I'm down and out!

"Michael A. Terrell" <mike.terrell@earthlink.net>: Dec 15 08:20PM -0500 > put, one speck of dust, one > stray hair, and I'm down and > out!     We all have something that affects us. The problem is when others ignore the issues they have been told about. I'm diabetic, but people keep trying to get me to eat things that are loaded with sugar. I am already having problems controlling my glucose levels. I am on two 1000 mg of Metformin, which is the maximum dose that is considered safe, along with two shots of 50 units of insulin per day. Add four test strips a day, and that is six times that you have to poke holes in yourself.   As far as dust goes, I used to use a large exhaust fan, and the air compressor to stir it up, and suck it out of the shop. or my home. Always on the upwind side, of course.

Phil Allison <pallison49@gmail.com>: Dec 15 04:00PM -0800 Gareth Magennis wrote:     > The multitude of grey interconnects are not actually screened cable, just a > signal wire lying beside an earth wire. > I don't know what level of protection that actually offers.   ** Close to none.   The layout relies on the two plate wires being in close proximity so the out of phase electric fields cancel at a distance.       ... Phil

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