Thanks Philip; I notice another item I neglected to mention in this. A capacitor works 'sort of' like a flashlight battery with a couple major exceptions.
1: it can hold VERY high voltage 2: it normally releases that voltage in a large burst as opposed to slow and steady like flashlight batteries However, LIKE flashlight batteries, it CAN hold its punch even when the item is not plugged in... so pulling the plug does not render it 'safe'. Therein lies a capacitors biggest 'bee sting' ability. When it seems safe, still be careful not to let your guard down. Related humor story: I had a science teacher who liked to get a moderately low voltage capacitor and charge it. He'd leave it on his desk conveniently located for access by incoming students who might be curious enough to 'explore' things that were not theirs to touch. Being a guy of about 250 lbs, he could take a bit more shock than the 140 lb teens could, so he picked his capacitor accordingly. When he'd break between classes he'd often lay it there and step conveniently out of the room as teachers are known to do. He was often seen to come into the room and take an old screwdriver to 'check' this little unknown 'thing' on his desk... till later in the year when we understood what it was and why he did it. More than one time a student was heard to have choice things to say to the teacher with his back turned...however they managed to eventually 'get the message' eventually. Now days some parent would probably sue him for abuse. For those of us who never got 'got' it was a great laugh to finally know why some had been so 'anti teacher' all year. Don - - - - - - - - - - - - - - - - - - - - - - - - - - - - >From: Philip Stortz, [EMAIL PROTECTED] >Reply-To: 1st PowerMacs, [EMAIL PROTECTED] >To: 1st PowerMacs, [EMAIL PROTECTED] > >mostly you want to be careful of the "big red wire" and careful of >everything when it's >plugged in and turned on. pieces of metal may actually have a high >voltage on them rather >than being grounded, on older tv sets even the metal chassis was often >connected directly >to one side of the power line! please be extremely careful. note that >you'll want to use >a mirror so you can be behind the monitor and see the screen rather than >awkwardly and >dangerously reaching around while being in front of the monitor. usually >the focus(es) >(sometimes there are 2) adjustments are on the high voltage multiplier >(the thing the big >red wire comes out of, the other end being connected to the picture tube, >and possibly >another somewhat thick "focus" wire connected to the picture tube socket). > these do >usually take a little time to settle as you adjust them so go slow. also >make sure to >degauss the monitor thoroughly first, sometimes this will solve the >problem. definitely >use an insulated screw driver (and one that's clean, crud can conduct high >voltage rather >nicely) and keep your hand on the plastic part (wood is not an adequate >insulator for high >voltage, especially since it does tend to absorb moisture etc. over >time!). BE CAREFUL! >DON'T DO IT WHILE YOU ARE TIRED OR IN A HURRY! i've worked on a lot of >monitors, and i'm >still very, very careful and only do it when i'm well rested and have >plenty of time, and >no kids or pets etc. around creating distractions and other hazards. > >Don wrote: >-------- >> >Manuals for anything you might need. The manual for the 1710 display doesn't >> >mention getting in and doing any sort of gun adjustment, but at least now I >> >know how to get into it! :-) >> > >> >David Bilenkey >> >Ottawa, Ontario, Canada >> > >> >> David; >> >> Monitors contain capacitors that can pack a huge electrical >> punch. It is possible to stop the human heart from a shock >> from one of them. Please exercise EXTREME caution if you >> ever attempt to open a monitor for any reason whatsoever. >> >> Even if you know what you're looking for and 'discharge' one, >> a capacitor can STILL hold enough charge to dish out seconds >> if you have a belief that you've already made it safe by >> discharging it. >----------- -- 1st-PowerMacs is sponsored by <http://lowendmac.com/> and... Small Dog Electronics http://www.smalldog.com | Refurbished Drives | -- Sonnet & PowerLogix Upgrades - start at $169 | & CDRWs on Sale! | Support Low End Mac <http://lowendmac.com/lists/support.html> 1st PowerMacs list info: <http://lowendmac.com/lists/1st-powermacs.shtml> --> AOL users, remove "mailto:"; Send list messages to: <mailto:[EMAIL PROTECTED]> To unsubscribe, email: <mailto:[EMAIL PROTECTED]> For digest mode, email: <mailto:[EMAIL PROTECTED]> Subscription questions: <mailto:[EMAIL PROTECTED]> List archive: <http://mail.maclaunch.com/lists/1st-powermacs/> --------------------------------------------------------------- >The Think Different Store http://www.ThinkDifferentStore.com ---------------------------------------------------------------
