Build Your Own Arcade Controls Forum
Main => Monitor/Video Forum => Topic started by: Ghoward on November 01, 2003, 07:41:19 am
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Hi,
Ok I know pulling the suction cab off the back of a monitor is going to give you a bad shock without discharging it
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The large power supply capacitors can be lethal,if they don't discharge properly after power off.If the tv/monitor is working properly though it should discharge itself properly straight after power-off,and i've opened a few monitors,tvs and amplifiers and have yet to find any charge...its not worth the risk though so I make sure to disharge every time,as you never know when it could happen.BTW these caps are probably more dangerous than the charge in the crt as the crt charge is very large voltage but low current and unless you short it straight to your heart,you'll probably just get a mighty scare....not recommended if you have a heart condition though,lol.
I guess other risks are crt implosion on older and some recent monitors i.e don't drop any tools on the tube or could get glass flying everywhere and lose an eye in the process.
Besides those few risks theres really not that much to be worried about ,people tend to be scared of these things simply because they don't understand them,but if you always take the proper precautions and have a decent understanding of how it all works inside you are very unlikely to hurt yourself and sometimes you have to get inside them if you don't want to pay through the roof for a new monitor or pay for the labour costs of a serviceman to do it for you and if your building a cabinet you'll probably have to open up at least once to wire the thing in.
DL
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The largest electrolytic power supply capacitor can hold a pretty hefty charge for a while. If the monitor is working properly this capacitor will be fully self discharged after about 15 to 20 minutes once you turn the power off to the monitor. If, however, your monitor is not working properly AND the fuse is blown this capacitor has no place to discharge. It can hold it's full charge for about a week. I discharge them with a common 60 or 100 watt home light bulb across the capacitor terminals. Once you see this bulb light up and fade out you'll have a safe chassis to work on.