Antonio Rodr�guez wrote:
I have several friends that are either electronics hobbyists, or that even work as repairmans. I have heard several stories about shocks by high voltage discharges from large tubes (more than 20"), and the worst thing I have heard to have happened is a friend of mine being inconscious for half an hour.
Your friend is very lucky to be alive.
Taking into account that big CRTs have an anode tension that is three to four times higher than the present in compact Macs (some big TVs carry more than 30.000 volts!), I would say that you aren't in a big danger when you are working with an (undischarged) compact Mac. To that you should sum that about half of the compacts ever manufactured provide an auto-discharge circuit, and that even in those that doesn't provide with it, you ussually don't need to get your hands near the high tension parts of the analogue board or the CRT.
It's hard NOT to get near the potentially hazardous parts of a compact Mac. Replacing the high voltage circuitry was the most common repair I did on compact Macs (except adding RAM - not really repair) and this was usually accomplished by just replacing the whole analog board. Normally I'd let them sit for a day and discharge by themselves, but on occasion would have to manually discharge them before working if someone was in a hurry. I don't know the actual amperage, but judging by the spark you could generate, it was a pretty healthy (or unhealthy as the case may be) amount.
But I can't say that 100% for sure, so take this advice at your won risk, etc. <--- "cover your ass" sentence.
Anything with mains power going in is potentially dangerous (read deadly) and has to be handled with respect.
Stephen
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