Instructables
Picture of How to safely disassemble a CRT monitor
Do you have a old CRT monitor lying around your house but you think it's too dangerous.
Now is your chance to do it moderately safely do it.


I take no responsibility for any injuries ect. caused by you disassembling a CRT monitor.
 
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Step 1: Tools

  • Screwdriver (Insulated handle)(one that you don't mind the tip getting a bit melted)
  • Piece of wire, one that you don't mind melting, preferably a thick wire (to ground the screwdriver)
  • Nail (to puncture the tube to fill the vacuum)
  • Rubber shoes (To insulate you from the ground)(optional)

Step 2: Removing the screws from the monitor

Well do what the title says,
Remove the screws and you can remove the base if you want to.
When all the screws are removed carefully take the cover off.

Step 3: Discharge the CRT

Connect the wire that was in the tools list to a ground wire,how to find a earth/ground, on that PCB find the earth terminal of the power input and connect the wire to that. Connect the other end to the insulated screwdriver. Make sure that electricity can flow from the end of the screwdriver to the ground wire.

Put the end of the screwdriver under the suction cap and tap it onto the wire. If it is charged you will hear a loud crack, do that a couple of time just to be sure it doesn't crack it's uncharged but try to discharge it a couple of times anyway.

Step 4: Remove the PCB on the neck of the monitor

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Remove the PCB on the neck of the monitor, there will be zip-ties holding it down or glue. Cut the zip-ties or break through the glue.

You will have to be careful with both methods.

Step 5: Releasing the vacuum of the CRT

Get the nail or small object to break the point where they originally removed the air (vacuumed) from the CRT.

If you want to be extra careful, but a blanket over the monitor and break the fill point.

Tap the nail in with whatever you want, when you hear it start hissing that means you broke the vacuum, once the hissing has stopped you can do whatever you want with the parts.

That concludes my Instructable
Please comment and rate it if you like it.
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logamuthu1 year ago
Very clear exposition of a daunting job. Kudos!!
UATradition3 years ago
So I just straight up cut through all the wires and the big red one leading to the suction cup and no sparks or melting wire cutters ... could something still be charged ? Other than any capacitors ? I haven't removed the suction cup yet ...
IMG_0952[1].jpg
synchr0nize3 years ago
errr why would you need to do this?
Greyfox953 years ago
I disassembles one of these today, i wish i would have seen how to ground it before i shocked myself! dang flyback...
when my tv breaks im goona take it apart cuz i want a flyback but i thin that the tv will have gone bust beacause of the flyback great instructable by the way
RefStone3 years ago
Nice intructable, someday I'll do a follow up on using the parts if there isn't one already.

There is one piece I really like for non-electrical reasons. You can see (step 5) a metal ring going around the tube, just below the green topper, with a bolt through it (the bolt is at a tangent to the green circle, on the bottom left). This thing can be really useful. I keep one on my belt loop to hold a standard plastic bottle at my waist. It just pops in and out, no adjustment necessary, once you get it right.

Be well.
-Ref
drresearch4 years ago
Why do you have to break the CRT? Can't you leave intact?
thermoelectric (author)  drresearch4 years ago
As you already got a answer, I don't need to answer, but I want to. You can leave it intact, but filling it (getting rid of the vacume (I still can't spell that), reduces the risl of implosion etc.
Ooh, I found the answer below!
Xellers6 years ago
Would it be possible to somehow extract the CRT without damaging in and to use it again for another proejct?
thermoelectric (author)  Xellers6 years ago
Yes, but i broke the vacuum so it didn't implode if i dropped it.......
But if someone didn't brake the vacuum, what could be done with just the CRT? I would also be interested to know.
thermoelectric (author)  drresearch4 years ago
There is very little you can do with the CRT once you get rid of the driver circuitry. Making your own drivers are not a good idea, Unless you want to potentially give yourself a mega dose of all types of radiation.
might you be planning on making a CRT fishtank? WOW! I am too!
mason01905 years ago
isnt there like radiation or summin in der!?
thermoelectric (author)  mason01905 years ago
No, unless you call the poisionous lead and phosphors radiation...
if you break the vacume dont you have to worry about explosive decompression????
thermoelectric (author)  golddigger15595 years ago
Yep, Breaking the neck of the CRT or piercing a hole in the place where it was originally filled (at the top of the neck) slows the decompression because there must be a restriction in the neck somewhere... But it's always good to be careful.
joinaqd5 years ago
nice.i gave you a 5 star
thermoelectric (author)  joinaqd5 years ago
Thanks :-)
mg0930mg5 years ago
I just throw rocks at them from 30 or so feet away. Never taken the parts out,though. It was just a monitor in the woods, someone left. May bring it out, and get parts.
thermoelectric (author)  mg0930mg5 years ago
Oh.
Enter 775 years ago
personnaly i find a 12 gauge is the most fast, efficient and most important, FUN method of dismantling and old CRT :P
some assembly required.jpg
thermoelectric (author)  Enter 775 years ago
I, I, I, I'm speechless....... :-P
i was there, that was one hell of a weekend :D. we gota top it next year now lol XD
thermoelectric (author)  Fliboi5 years ago
Good luck.....
also note the mcdonalds toys and nail gun fuil cylinders littering the ground around it. And the burn marks from tracer rounds/butane explosions
thermoelectric (author)  Enter 775 years ago
Yeah, I usually just hit the mcdonalds toys with a hammer, Give them to my dog.....
i talked with a tv repair person and they said that a screwdriver can't handle 10,000 volts.he says that you should use a high voltage probe connected to a 1mega ohm half watt resistor just to be safe. here is a pic of the probe.
PR-28A.jpg
thermoelectric (author)  devicemodder6 years ago
Yeah, But a exploding screwdriver is just part of the fun. Thanks for the warning anyway
your welcom
thermoelectric (author)  devicemodder6 years ago
Yeah...
the screwdriver is grounded so it's 0 volts.
thermoelectric (author)  awang85 years ago
And you discharge that to the positive of the flyback and the capacitor to be safe......
kitrule5 years ago
Don't you need to connect the screwdriver to something really grounded rather than the earth connection from the power cable socket which isn't connected to the mains?
thermoelectric (author)  kitrule5 years ago
Well, I connect it to the ground of the device because it's pretty hard to try to discharge capacitors with only one lead in the ground, But it's worth a try....
use caution because the crt can recharge even if it is unplugged for 2 years. to avoid serious injury or death DO NOT attempt this:-)
thermoelectric (author)  devicemodder6 years ago
Yeah, That's the electrolytic caps charging up, I like challenging myself so I attempt anything dangerous
you don't release vacuum. Vacuum is the absence of particles inside something so when you puncture it it fills up, not comes out. Aren't those things filled with like radon or something... I know there is lead in the glass to reduce radiation.
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