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#31
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O.T. Cleaning computer
J. P. Gilliver (John) wrote:
In message , Mr Pounder Esquire writes: J. P. Gilliver (John) wrote: In message , Mr Pounder Esquire writes: [] Oh, I've always earthed myself to a radiator before I take the desktop into the garage. Good idea, but voltage is relative - it's more important that you touch (an exposed metal part of) the chassis before touching anything inside - in theory, it probably doesn't matter if you're at 1 kV, if the chassis is also at 1 kV. (Well, I exaggerate for effect, but YKWIM.) If the chassis and you are both grounded, even better. Often achievable by leaving the mains lead (US: line cord) plugged in, assuming it's a 3-pin plug. I need to take it into the garage and take the panels off before I can touch the chassis. Then I have to find an earth. That might be one case where, indeed, you and the chassis are at the same potential (thus you're unlikely to cause damage by a discharge), even if that potential isn't earth potential. (Although I'm surprised you don't have a handy earth in your garage - don't you have power there, e. g. for a battery-charger? If so, I'd _hope_ it has earth terminals!) Plenty of power sockets in there. Are you suggesting that I remove the cover off one of them, find the earth and hold it? JPG Ever been frustrated that you can't *disagree* with a petition? If so, visit 255soft.uk - and please pass it on, too. |
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#32
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O.T. Cleaning computer
Pounder,
Are you suggesting that I remove the cover off one of them, find the earth and hold it? Exactly that. .... unless you do not trust your own homes wiring in that regard ... :-) Better yet: connect your 'puter to it and than touch the 'puters chassis before doing anything else. If you don't *you* might have no static charge, put if your 'puter does have some it may still discharge toward you - creating the exact same destruction as when it happens the other way around. Regards, Rudy Wieser |
#33
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O.T. Cleaning computer
R.Wieser wrote:
Pounder, Are you suggesting that I remove the cover off one of them, find the earth and hold it? Exactly that. ... unless you do not trust your own homes wiring in that regard ... :-) Better yet: connect your 'puter to it and than touch the 'puters chassis before doing anything else. If you don't *you* might have no static charge, put if your 'puter does have some it may still discharge toward you - creating the exact same destruction as when it happens the other way around. Regards, Rudy Wieser I have a pipe like thing that goes into the ground. The power wires to the garage go through it. Would this do as an earth? |
#34
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O.T. Cleaning computer
In message , Mr Pounder Esquire
writes: R.Wieser wrote: Pounder, Are you suggesting that I remove the cover off one of them, find the earth and hold it? You shouldn't need to remove the cover to get at the earth; the earth pin socket is earthed. If the sockets are metal, their casing should be connected to earth anyway. Exactly that. ... unless you do not trust your own homes wiring in that regard ... :-) Better yet: connect your 'puter to it and than touch the 'puters chassis before doing anything else. If you don't *you* might have no static charge, put if your 'puter does have some it may still discharge toward you - creating the exact same destruction as when it happens the other way around. Regards, Rudy Wieser I have a pipe like thing that goes into the ground. The power wires to the garage go through it. Would this do as an earth? Ideally, any such conduit - if metal - should be connected to earth anyway. If it isn't, then yes, it should still be a fairly good earth, except in very dry conditions. But as Rudy says, the important thing is that you and the computer chassis are at the _same_ potential, so that neither can discharge into the other; if both are at earth, so much the better. If one is and the other isn't, it _can_ potentially (!) cause damage when they touch. visit 255soft.uk -- J. P. Gilliver. UMRA: 1960/1985 MB++G()AL-IS-Ch++(p)Ar@T+H+Sh0!:`)DNAf "Victory does not bring with it a sense of triumph - rather the dull numbness of relief..." - Cecil Beaton quoted by Anthony Horowitz, RT 2015/1/3-9 |
#35
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O.T. Cleaning computer
Pounder,
I have a pipe like thing that goes into the ground. The power wires to the garage go through it. Would this do as an earth? Not likely. a) Is it a *metal* pipe (yeah, I know. A bit of a "duh". But I have to ask) b) Does it go down into groundwater level ? (don't think so, as electricity and water do not mix very well) c) Is the pipe electrically "connecting" to that groundwater (is it blank (non-coated) where it goes that deep) ? A grounding terminal is mostly just a (mostly) copper pipe/rod driven vertically into the ground, with a single (often blank) wire coming from it going to the fusebox. If your outlets in the garage have earth terminals and the wiring was laid by a verified electrician that those terminals *have* to be earthed correctly (by law). If some cheap, off-the-books blunderer put those sockets there you would be *lucky* if they where not connected at all. If they would be connected to other power sockets, but not (correctly) to a ground terminal than a short in one machine could go thru the earth wiring and "come out of" it into a fully different device - or even cause other metal things, like central heating radiators, faucets and showers become electrified. In short, you would than be living in a death-trap. So don't "wing it", but make sure. Your life depends on it (no joke). Regards, Rudy Wieser |
#36
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O.T. Cleaning computer
Pounder,
Are you suggesting that I remove the cover off one of them, find the earth and hold it? After re-reading it I'm not at all sure what you mean with "remove the cover". Do *NOT* open a power socket so that all three terminals (nutral, phase and earth) are exposed and try to touch just the earth terminal. Repeat: DO *NOT* DO THAT. Best way to get at that earth terminal ? Grab yourself a do-it-yourself power plug (that you can open and wire yourself), and connect a single wire to the earth pin/terminal. After that simply use the other end of the wire. Suggestion: put a alligator clip on the end and put it on the 'puters frame (easy to put on, eazy to take off). Than touch the frame before working on its innards. Regards, Rudy Wieser |
#37
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O.T. Cleaning computer
On Sun, 2 Dec 2018 18:14:15 +0100, R.Wieser wrote:
Suggestion: put a alligator clip on the end and put it on the 'puters frame (easy to put on, eazy to take off). Than touch the frame before working on its innards. Put a 10megohm resistor between the cable and the alligator clip. That will slow down any discharges so that it won't cause a problem. It's not just the voltage that causes problems it's quick changes in voltage as well. -- Regards - Rodney Pont The from address exists but is mostly dumped, please send any emails to the address below e-mail rpont (at) gmail (dot) com |
#38
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O.T. Cleaning computer
On 21/12/2018 04:39, DK wrote:
Leaf blower! Needs to be done outside because of all the dust it releases in the air but leaves the whole case/motherboard/radiator/fans in pristinely clean condition. Vacuum is not anywhere as efficient. Best solution is to use a hose pipe with a pump to wash out everything in the computer. Alternatively, put the machine in a bath tub to soak it overnight with a good quality bleach!!!. -- With over 950 million devices now running Windows 10, customer satisfaction is higher than any previous version of windows. |
#39
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O.T. Cleaning computer
On Fri, 21 Dec 2018 14:35:13 +0000, ? Good Guy ?
wrote: On 21/12/2018 04:39, DK wrote: Leaf blower! Needs to be done outside because of all the dust it releases in the air but leaves the whole case/motherboard/radiator/fans in pristinely clean condition. Vacuum is not anywhere as efficient. Best solution is to use a hose pipe with a pump to wash out everything in the computer. Alternatively, put the machine in a bath tub to soak it overnight with a good quality bleach!!!. Warm water with a bit of dish detergent and de-ionized water for a rinse, will fix a lot of problems, particularly those that manifest themselves in high humidity conditions due to crude on the circuit boards. BUT it takes a fair amount of electronics knowledge to know which parts are not sealed and should stay dry, and a good drying technique is a practical necessity. A home oven will work to warm and drive off the moisture but a vacuum oven would be a better choice. The folks that use isopropyl alcohol are essentially using a solvent with the same characteristics as water. (most of it is ~30% water) It just evaporates a lot faster than water so is easier to dry. |
#40
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O.T. Cleaning computer
I found a new way of cleaning computers
of odd bits and pieces; scotch tape. I had a hair on the motherboard and used scotch tape to remove it. Simple and easy. Robert |
#41
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O.T. Cleaning computer
On Mon, 24 Dec 2018 07:31:47 -0800 (PST), Mark Twain wrote:
I found a new way of cleaning computers of odd bits and pieces; scotch tape. I had a hair on the motherboard and used scotch tape to remove it. Simple and easy. Be careful, it can generate a lot of static when you pull it off. -- Regards - Rodney Pont The from address exists but is mostly dumped, please send any emails to the address below e-mail rpont (at) gmail (dot) com |
#42
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O.T. Cleaning computer
rp wrote:
On Mon, 24 Dec 2018 07:31:47 -0800 (PST), Mark Twain wrote: I found a new way of cleaning computers of odd bits and pieces; scotch tape. I had a hair on the motherboard and used scotch tape to remove it. Simple and easy. Be careful, it can generate a lot of static when you pull it off. Yup. X-Rays, too. |
#43
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O.T. Cleaning computer
Well, I didn't stick it to anything but I
didn't realize tape would create static or X-rays. I don't think I'll do that again. Robert |
#44
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O.T. Cleaning computer
On Mon, 24 Dec 2018 07:31:47 -0800 (PST), Mark Twain
wrote: I found a new way of cleaning computers of odd bits and pieces; scotch tape. I had a hair on the motherboard and used scotch tape to remove it. Simple and easy. Robert Yup, works like a champ for some applications. One thing everyone here is missing is the ambient humidity. If the humidity is high, it is very hard to screw up a circuit board from static electricity. If you are walking across a carpet and getting shocked on doorknobs - that is not the day you should be messing with electronic circuits. CMOS electronics... or things like computers, etc.. The old bipolar transistors had a much higher tolerance for static discharge. Even when they break-down in reverse bias conditions they survive as long as the current isn't high. CMOS is another ball game entirely. I like using tape to pick up dust and stuff too. But then I live in the southeast and humidity is high 10 months a year. |
#45
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O.T. Cleaning computer
Just use the canned air stuff to clean the dust bunnies etc out of the heat
sink fins. You can use it on the fan blades also, just don't let them spin up much. It will be just fine. Don't overthink it, like some do. Buffalo "Mark Twain" wrote in message ... In your image (2) are actually screws and those were the ones I was attempting to unscrew because I could see that the spring loaded ones were not what I needed to remove the fan. Hmmmm I never thought of metal filings dropping to the motherboard. I think I should leave well enough alone. As I said I don't want to mess things up. Robert |
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