Something that should easily catch the eye is the large metal blocks. These are heat sinks for a few of the parts that handle a large current. On each of the heatsinks, you may find a different part, but on mine, I found High Voltage Regulators. They were attached to the heat sinks by a paste that allows for a better transfer of heat from the regulator to the heat sink. Also, the heat sink and regulator are both attached to the board by solder points. Be sure to remove all of the solder before prying the part off the board.
To remove the relay, simply pull on it, or pry underneath it with a flathead screwdriver.
Another glance at the circuit board leaves it looking much cleaner, now a lot of the bigger pieces are no longer causing clutter on the board. There are still a few parts that are rather large and in the way, so we will want to remove those next. One piece on the board is a big black cylinder sticking up on the board. This piece is known as a capacitor. It is exactly the same as many of the other round cylinders on the board, it can just handle a higher charge. In fact, it comes in a variety of shapes across the board. The easiest way to fnd it is by reading the numbers identifying parts on the board. It should always be proceeded by the letter "C".
In this single photo, you can see the large black Capacitor, smaller blue ones, and even some flat brown ones. Each of these are identified by the numbers on the sides of them. It explains exactly what their specific elements are. For example, the large black one is a 200 volt, 1000 micro Farad capacitor. Each of the capacitors should have two leads connecting it to the board making removal of them quite easy. Also, each individual capacitor will be able to be put to good use in your projects later. Along with the capacitors, the tv contains another two pronged part that is easy to remove. It contains hundreds of tiny resistors. The ones pictures below are actually coated in a fire retardant.
The resistance of each one is denoted by the colored rings. In most TVs, you will find hundreds of resistors ready for harvesting. You will be hard pressed to find an electronic project without the use of resistors. This particular TV has a special type of resistor called a Standoff Resistor. These resistors are held off the board to keep from overheating surrounding components.
The last kind of resistor contained within my TV looks a little different than the standard two pronged resistor. It is a variable resistor. These are used to adjust the flow of current through them, to fine tune a project. They can be adjusted with a small screwdriver, usually.
Like the capacitor, resistors can be easily located on the board by the letter "R" followed by some numbers. Also, in the picture above, you will notice a part that looks like a resistor, but is notated by "D409". This part is known as a Diode. The most familiar form of a diode you will be an LED or Light Emitting Diode. After removing a few resistors and diodes, I noticed the small red cubes on the side of my board. These parts were denoted by a T preceding the numbers, letting me know they are Transformers. They are usually easy enough to spot by a copper wire coiled around them.
In this particular instance, the wire is covered by a protective coating. It will usually require 4 or more connections to be removed of solder, to be able to pull it from the board. They will be found across the board in various shapes and sizes. Other than those, another notable part comes in the form of long black strips with many little pegs across them. These are integrate circuits and are denoted by IC.
In my particular instance, there were 4 or 5 of them across the board. They can be researched online, through their identifying numbers, and you can find out exactly what they are hardwired to do. After removing all these various pieces, I came across one other oddly shaped object. It was packaged as a little blue square and was preceded by the letter "X".
These pieces will be pretty rare across the board, and are called crystals. They are commonly used to keep the timing of the entire circuit in check. With these and the rest of the parts, you will have plenty of things to remove from the board. After removing them all, we can begin the process of categorizing and checking for the parts to be in working order. All of that will be covered in my next post.
Happy Hunting,
Fletch
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