Cut the ground wires from the tube
In order to separate the circuit board from the tube and the casing, you need to cut off all the ground wires from the around the tube. Here is an example shown above.
You should also remove the springs attached to the wire which may come in handy for later use.
Remove the Main Circuit Board
On this monitor, to remove the circuit board, two tabs under the bottom must be first be unlatched before the metal base with the circuit board can be removed.
With the tabs released, the circuit board can now be moved freely.
The last set of wires are attached the the smaller circuit board, so cut them off from that end.
Once all the wires are removed, the main circuit board can be removed.
Take special care not to damage the circuit board because you will desolder the onboard components later.
The desoldering of the circuit board will be covered in another detailed tutorial.
Here's the main prize, the flyback transformer. It will be useful for all sorts of high voltage projects which I will cover in the future.
The monitor as a unit may be nonfunctional, but, I bet a lot of these still have an interesting life ahead of them.
Remove the smaller circuit board
The next step is to remove the small circuit board attached to the tube. It is normally held on by a strong adhesive at the base of the CRT connector. Just take a flat head screwdriver and pry in between the seam of the tube connector and the tube until it comes apart as shown below.
The glue was the only thing holding the circuit board fixed to the glass tube's base.
Stripping the neck
Since I intend to strip out everything from the monitor leaving only the tube and the casing, that meant I had to remove the stuff from the tube's neck as well.
You should prevent from breaking the tube because sometimes breaking the tube, means it can't be recycled once your done.
So take care when handling this part of the disassembly.
There is a lot of copper wire around the lower neck of the tube. There is a market from recycled copper, so you could make a buck or so here. There is also a lot of copper wire in the taped loop the surrounds the tube. It is connected by two wires to the main circuit board.
To begin taking the stuff off, there is usually one or two clamps that must be loosened first.
Loosen the clamps and carefully remove the spacers from around the neck.
These are all the spacers removed from the neck of the tube and one of the two metal clamps.
Once the spacers and other obstructions are moved out of the way, the steering coils can come off.
To do so, first pry off the four insulated cushions at the base of the coils and then the coils should be free to slip off.
Now that the last piece is off, this monitor is now fully salvaged for it's useful parts.
This is what is actually called the Cathode Ray Tube or CRT for short.
It's a heated filament and is in a vacuum created inside the glass tube. The "ray" is named after a stream of electrons that is emitted from the heated cathode into the vacuum tube.
The screen is coated with phosphor, which glows when struck by the beam of electrons and the steering coils paints the images you see on the screen.
Putting the case back together
At this stage, the casing is put back together. The tube was not removed from the casing because it's a lot safer and prevents the neck from accidentally breaking off.
Now you can take the CRT to a recycling facility. Keeping the CRT out of the
landfill is the objective here. As mentioned before, you don't want the toxic substances such as lead to seep into the earth which may contaminate underground water supplies.
If you followed all the steps closely, then you will have a similar compilation of parts shown above.
Please note that I also spared the monitor's swivel base that may be of great use on a later project.
Of coarse, your final compilation will vary depending on make and model and whether it is a TV or computer monitor.
I hope you have found this tutorial useful.
If you have any comments or questions, please state it below.