04.04.2016
Here’s a block diagram of a Digital LCD TV and if possible you may print it out for future use. This is a big subject and i suggest that you find a book that can explain all these in details for you. Its very nice knowledge and now a days LCD becomes common and major changing in community mind-set so as to buy LCD or digital imaging products with respect to CRT base . I invariably found some the problem of LCD monitors that are thin white line horizontally or vertically and black circle spot on the screen.
The aim of this article is to present examples of typical defects of TVs we have encountered during our years of experience with flat screens. The aim of this site is to make it easier for you, the users, to be able to describe of any defect in your TV and consult it with our Service Department. The Image Gallery contains pictures of defects which were either caused by wrong manipulation or a manufacturing fault.
Especially with brand new panels, typically several hours of watching the same TV channel is enough to burn the TV logo in the panel (see the Gallery). Furthermore, beware of the possibility of burning-in black horizontal edges at the top and bottom or the screen, when using inappropriately chosen picture size. Note that this defect is not eligible for warranty repair and the only solution to this problem is to replace your entire display unit, which is always a very costly repair.
Plasma screens are designed to be more "children proof" but some caution is needed here too. Older models used to have a removable protective glass placed in front of the PDP panel, but TV producers abandoned this idea due to the settling dust in between the glass and the panel. Newer Plasma models have the cover glass glued directly to the PDP panel, and for this reason, it can not be replaced.
Intro: DIY Electron Accelerator: A Cathode Ray Tube in a Wine BottleLearn how to build your own subatomic particle accelerator in a weekend! Step 3: Clean The BottleThe first step in our adventure is to clean out the wine bottle and remove any internal or external labels it might have. Step 6: Assemble the TubeTo finish construction of your cathode ray tube, first, apply a layer of epoxy over the rim of the mouth of the wine bottle.
Step 7: Prepare the PumpIf you've worked with vacuum pumps before and already know what goes where and who connects to what, then you can skip this step. Step 10: Fire it Up!Once you've assembled the vacuum system and connected the high voltage power supply, you're ready for a test. As complex as the idea of a particle accelerator might seem, it's actually strikingly simple to implement. For your information I used to understand an equipment block diagram first before i go into the schematic and analyze the circuit functions.This is the first step if you wants to venture into new electronic equipment repair.


Disable the pico fuse or cut open the circuit trace (usually is the 12 to 14 volt line) if the board does not have pico fuse.
Since a broken LCD screen is an irreparable damage, the LCD panel needs to be replaced and this can have a serious impact on your family budget. This simple project will allow you to investigate a variety of intriguing effects including magnetic deflection of an electron beam, Crookes dark space, plasma striations in a gas discharge tube, and many others. In the Gallery bellow you can find pictures of the defects that will help you correctly identify your problem. Follow our team for updates featuring event coverage, new product unveilings, watch industry news & more! The lines shown in your pics are classic symptom of a bad T-Con (Time Control PCB) as they are repetitive and evenly spaced ("timed") across the entire display. It is very similar to yor problem except with your symptoms, there is video behind the distortion. It can easily be used for a high school physics or science fair project and is compact enough to be demonstrated virtually anywhere. Thomson and subsequently used to make several important discoveries about the fundamental nature of the atom and the electron.
Sometimes it also depends on the problem of the inverter board too and not necessary you have to cut open the circuit trace. The T-Con is the cheapest board (other than remote sensor) to replace on the set and is what I would try before condemning the TV. You could be accelerating electrons to non-relativistic velocities after a trip to Home Depot and a visit to your local AC repair store and neon sign shop! Best of all, no advanced electrical or mechanical knowledge or tools are required.Judges, see step 12 for contest entry details.
Nowadays, advanced versions of this type of accelerator are commonly used for radiotherapy and ion implantation. Essentially, our cathode ray tube is just two electrodes in a vacuum chamber with a high voltage applied between them.
This project was featured on Hackaday, Slashgear, Engadget, Gizmodo, Gadgetblog, Tecmundo, Matuk, Zedomax DIY, and Make, as well as in the weekly newsletter and multiple times on our own front page!
When enough of the air in the chamber has been removed, electrons will freely accelerate from the negative electrode (cathode) towards the positive electrode (anode). However, instead of impacting the anode and returning to the power supply, some electrons will fly right past it and keep going until they hit a glass wall.
Some interesting effects that can be observed at this stage are sputtering and magnetic deflection. Sputtering: If the acceleration potential is high enough, then some electrons striking the anode will have enough energy to knock metal ions right off the electrode.


Magnetic Deflection: In physics, we all learned the Lorentz force law ( F = q[E + v x B] ), or the force on a point charge due to electromagnetic fields. In this context, it tells us that electrons will be accelerated from the cathode to the anode due E, the electrostatic field created by the high voltage power supply and that those electrons will also be accelerated by another field, B, in a manner that is dependent on the velocity, v, of those electrons.
Since the velocity vectors of the electrons will be pointing roughly from the cathode to the the anode without an external magnetic field, we can use this to find out what effect a magnetic field will have if we introduce one. Let's say we bring a magnet close to the tube while it's energized and we align it so that its field is roughly normal to the surface of the vacuum chamber.
If we compute qv x B, we will find that the force due to the magnetic field is perpendicular to the paths of the electrons and to the magnetic field (by the definition of a cross product). In other words, the magnet curves the paths of the electrons and this effect is amplified by the duration that the electrons spend in the field. This effect can easily be observed inside of our cathode ray tube if a magnet is present nearby.
I had recently become obsessed with Cathode Ray Tubes and their essential place in history and being able to make one with your instructions made it all the better. I am attempting to do a project on voltage and electron speed for my 8th grade science project, and this instructable has been very helpful, but the only issue I've had with producing all of the materials for the project was when I attempted to find a relatively affordable power supply. I really do appriciate you taking the time to post this instructable, and replying to questions. There was a constant purple stream touching the anode with about an inch of crooke's effect. After about 45 seconds the stream turned white like it usually does when the bottle gets hot and the contaminent is killed.
The stream came down in a tornado-like fation then went back up and there was just a swirling white tornado touching the side with 3 inches of crooke's effect. There were a few electric lighting- like strikes at the end of the anode before it repeated the process. With less than 10kV to 15kV of accelerating potential, the x-rays are stopped by the glass, but above that they can start making it through. Ideally, you would want to test for this with a Geiger counter, but if you don't have access to one, you can just lower the potential somewhat and stay back and operate everything remotely to keep your exposure as low as possible. This way, you'll be able to see where the electron beam strikes the bottom of the tube (I suspect it will be everywhere, since the beam is not focused).




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Comments Plasma tv repair toronto

  1. Hooligan
    You're gluing?stuck together forever before you opening tools.
  2. Tarman
    If one decides to invest in a UV lamp rated touch's kit comes with.