Opening up a CRT: dangerous?

You're lucky to be alive.

Amen to that.

 

Your mad anti...

 

I think I'm lucky to be alive then, some years ago me & my brother were tinkering with a 22" Supermac workstation screen, we had the plastic casing off while it was running (trying to figure out a way to connect it with its weird 13w3 connector) - though it did have huge metal sheets around it.

Problem solved though, my brother decided to buy the CRT even though the button is dodgy. End loss: 0 euros

 

How many times in your life have you heard, "that would explain a lot" b/c of your incident?

 

have to agree with everything being said, a few years ago I was messing about with an old 14" TV, it just died one day and me being the clever sod I think I am I went ahead and stripped the plastic off.

Took an electricians screwdriver and poped it under a sealed rubber hose attached to the neck of the CRT, needless to say my hand and arm was shot away from the tube, the screen "popped" and I was left crying on the floor breathless for a good 10mins clutching my arm and waiting for my heart to stop beating like a bastard.

So in short, CRT + Cock sure attitude = sticky horrible burning fleshy tingling sensation.

to quote zammo, just say no.

 

I saved someone's ass then. My friend's brother wanted to fix their TV.

I told the guy to stay the fuck away from it . Trash it and get a new one.

 

Anything that involves opening one of these up - take it to a proffesional or flog it. Getting it fixed is very pricey but better than killing yourself. I have also heard a lot of stories about people trying to mess with CRT's.

 

Well that in particular is the nasty part, that's why it's insulated so well...

 

Just a quick note while I remember, along the same lines - don't put potted plants on top of your TVs and then water them for several months, either. My mum did this at one stage and ended up filling a few inches of water in the bottom of the TV, at which point, predictably, it stopped working. The engineer who came to look at it had a fit, but it worked fine once emptied and I got it as a spare... cheers mum...

 

i think i remeber you need a crt tool with a 10 Megohm (maybe larger) resistor...
crts can store a lethal charge for years not just days, so id allways be very carefull.

plus the crt isnt the only thing you need to watch out for, there could be a number of capacitors that could do some damage to you.


do not use a screwdriver and a piece of wire... unless you have a friend standing by with an automatic defibulator.

 

The tube itself acts as a huge capacitor, very similar to the first capacitors known as Dewar Jars.

Due to the high insulation properties of the glass tube, these charges can remain for a very long time.

If you touch the contacts at the back of the tube, the only resistance in the circuit is you. Using the formulas V=IR and Q=I^2R (I'll let someone else work out the maths) you can work out that there's a lot of energy there which WILL kill.

 

If you never have worked on one and have not had electrical training stay clear. I have worked with electronics for years and not knowing what you are doing can kill you or at least paralize you for life. Problem with electricity is it offsets your heart pattern so even if you are shocked today the results may not show up till later.

 

I'd say instantaneous death is another problem.

 

just a small one.

 

I'd actually rather have it over and done with if the heart problem isn't fixable .

 

Funny, that's how I've been discharging tubes for the last ten years. Then again I've seen people discharge monitors with two screwdrivers, a Multimeter lead and a crocodile clip and even just wire.

I know someone that has had tube shocks at least 10 times, he says it feels like someone hit your elbow with a sledgehammer (he has also said it felt like a static electric shock too) but he is still walking around. Unless you have a heart condition then a tube shock probably won't kill you, but you'll probably wish it had.

The vast majority of deaths from monitors are caused by shocks when there is electricity going through them (ie plugged in and switched on) as then you are dealing with around 20KV at a fairly reasonable current.

High voltage won't kill you, current kills you. If you've ever had a static shock then that is effectively 10,000V discharging via your body... I've had a 200V 2000Uf Cap (generally the largest cap on a board, ignoring the mylar 2KV 1000pf caps which don't hold charge) shock and it felt like a static shock. I only got this shock by removing the main board from a chassis and dropping the board and touching said cap when trying to catch it.

 

Dewar Jars? I think that's what we use for temporary storage of liquid nitrogen (well, we call em 'dewars' but they resemble a jar)

 

I get bad static electricity shocks here in Japan. Some are so bad that I see the blue spark. THey really hurt but won't kill me. I now walk around with a discharger when ever I drive or go the arcades. It's just a small metal tube with a LED inside. If I touch a metalic item with this the LED lights up with the electricity from my body. After that it's safe to toch anything fora while I remember once in Sega World I went to put my 100 yen in to the slot of a machine when I suddenly received a very nasty shock. I ended up throwing the 100 yen in to the air where it landed on some guys head next to me He wasn't impressed at all.

Yakumo

 

i think you bowed your head and said Surrimasen and told why you got shocked.

 

It's "sumimasen". You should play Shenmue 2 more

And yeah, Japan must suck for that kind of stuff - mains sockets don't even have earth pins, FFS!