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Perhaps we should clarify that all those tools can come in real handy for those who either want to test or just tinker; but are not necessary to build a system. Wouldn't bother trying to repair a mobo (unless very minor). Most of the parts inside are FRU's--Field Replacable Units. In other words, it costs less in time and manhours just to replace the unit with a new one. (Not trying to throw cold water on this one, mind you; just clarify a little for anyone considering building their own for the first time).
Now, for those of us who can't keep their hands out of a perfectly good running system and keep hearing little voices in our heads saying "Tinker....tinker....must upgrade....gotta "mod" that sucker"....." https://discussions.virtualdr.com/
[This message has been edited by bistro (edited 06-05-2001).]
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Hi Bistro, This is true. As was mentioned we will start on Cooling next and thought we could include safety and tools aspect of whatever might be needed in the cooling area to get ahead a little.
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Hmmmmm...with a look-ahead to cooling...sometimes the case needs to be modified, so I'd say a computer tool kit (a regular set of screwdrivers, etc. can become magnetized and could cause problems), a dremel kit for cutting the case (depends; if you need to enlarge a fan grill for a bigger fan such as an intake), and a pair of safety goggles. Yes, I know there are some out there who use dremels and say "We don't need no stinkin' goggles"; but if you've ever been in the hospital Emergency Room with a piece of metal stuck in your cornea...then you'd know. https://discussions.virtualdr.com/ In lieu of a dremel, Radio Shack has "The Nibbler"--hand tool for cutting thin sheet metal; a bit slower and a little hard on the hands, but it works. A few packets of 6/32, 1 1/4" sheet metal screws with nuts come in handy too--just the right size for most fans. And a tube of Artic Silver thermal paste...no tool kit should be without it.
[This message has been edited by bistro (edited 06-05-2001).]
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amps kill
I am a person who's body happens to have low resistance = low number in Ohm.
so I know I should not work barefooted.
and yes, we have 230V voltage nowadays
(this used to be 220)
so YES, I am in greater danger than I would be if we were at 110V
A live wire in a 220 circuit can have 220 (in a circuit with two 220 phases), and can also have 380 on it. (a 380 phase with neuter has 220V potential)
so when I touch a 380 phase, I get 220V potential on me because I am making contact with mother earth (Terra = the neuter)
NOT funny.
I believe if phase is 220, it boils down to 127 or so.
STILL NOT FUNNY
the lower the resistance, the higher the flow. iow, a high Ampere number
in my Flemish laymens
Voltage = potential
resistance= impedance = Ohm
current or flow = Amp
someone calculate the voltage I need to get me killed when I have an impedance of only 50.000 Ohm?
if I am in even worse conditions, like a wet floor, I am down to less than 5000 Ohm
iow, I am in serious danger
EVERYBODY can get in this dangerous condition.
hence the 30mA differential
yes, 100 milliAmp can kill.
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as an aside, the power supply will handle the difference in cycles/s or Hz
I believe desktop power supplies are built for european countries on 50Hz.
I believe notebooks have transformers wich can autoswitch between 60 and 50Hz, and I believe they can even handle the various voltages.
their output will be the regulated DC the notebook requires.
forgive this laymens understanding,
I am a mechanic, no electronics engineer.
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Hi JTDoom, Glad your here. What about summarizing. Are you stll interestied in being the only real life scribe at VirtualDr. This of course would get you a raise of 50% more than your presently getting at VirDr. and of course increased benifits and perks. https://discussions.virtualdr.com/ https://discussions.virtualdr.com/ Some of the others will be envious I suppose..........HeeHee https://discussions.virtualdr.com/
interestied is spelled correctly the way I'm using it.
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[This message has been edited by greengoose1 (edited 06-05-2001).]
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Greengoose
In reference this question: Is there a need to talk about test equipment such as a vom or continuiy tester, pencil soldering irons (circuit board repair), or soldering irons (wire repair)? How to use them safely.
Not really as bistro brought out earlier, it amounts to just plugging different items together.
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If I may be so bold:
To Summarize
1.Electricity can kill. Unplug everything when working inside the case.
(Wearing a wrist strap while it's plugged in is NOT a good "shortcut"--you're flirting with death).
Note: by "everything" we mean everything. Still have the speaker wires plugged in? Is the speaker's AC adapter still plugged into a live outlet? Hey! You have a path for electricity! (Would be rare and odd, but electricity can be a tricky thing).
2.Cleaning the monitor--can do while it's plugged in, but put a small amount of spray on the cloth first, then wipe. Don't spray directly on the screen.
3.Do not attempt to work inside the power supply or monitor. Even unplugged, there are voltages in there that can cause severe injury or kill. Leave those to the techs.
Once the system is unplugged, it is now safe to go inside. However:
4. Use a wood table on an uncarpeted surface. Area should be as dust and clutter free as possible.
5. Protect the components against static--touch the chassis first EACH TIME you stick your hands in there or handle the components.
6. Though not totally necessary, recommend a small computer tool kit; it will have non-magnetic tools. (Magnetized tools can possibly ruin some delicate parts of your components). No need for special testing equipment if you are doing simple upgrades.
7. Go slow. There may be some sharp edges in there that can cut pretty bad. And those components are delicate; can break/fracture fairly easily.
(What did I forget?) https://discussions.virtualdr.com/
[This message has been edited by bistro (edited 06-05-2001).]
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Bistro, That is a pretty good wrapup and as there have not been many questions asked, we will start a new weekly subject.
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Good as place as any to get an answer Dodge. Maybe Bistro and Train can help you out while I change over. Right in the middle of it. https://discussions.virtualdr.com/
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[This message has been edited by greengoose1 (edited 06-05-2001).]
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Weekly Subject 02 now closes. Click here for Weekly Subject 03 - Cooling
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