Parts of The LCD TV (1)

The following is part of the LCD TV with a brief explanation for each function:

1. Front Panel Display

When compared with CRT TV then the Front Panel LCD Display is a Flat panel of his generally currently used mammal TFT LCD. Although many were using Plasma technology.

On the front panel display block is the Backlight to produce white light across the surface of the LCD. Diffuser that serve as filters, Polariser, backlight Back arrangement of TFT LCD, RGB Filters and Polariser Front.

The workings of the Front panel LCD display, more or less at the time of the LCD gets voltage then the molecule is a molecule crystals will be composed into horizontal so that the light from the translucent layers of the backlight can be front LCD. This could happen because the LCD is very crystal molecules between solid and liquid.

2. Backlight and Inverter

Backlight is part which also includes Front Panel Display. Inverter here is not part of the main power supply. We often see on the edge of the LCD if we overhaul will look like a small transformer transformer, that is the inverter. Its function is to change the voltage DC 12V into 1000 – 4000 VAC.

Because the display requires a voltage that is large enough so that it can produce a bright light. The Backlight itself is currently commonly used with type LED lamps.

3. TCON Board/FRC Matrix

The TCON is also a unity with The LCD Panel display, backlight and inverter. We know on CRT TV image is generated when electrons are controlled by Yoke def. CRT tubes fired at the luminous colours of so. The difference with this light the LCD is generated from every pixel on the LCD.

There are thousands of pixels/pixel LCD and every element has one transistor to be able to turn on/off the pixel.

The lighting of this pixel is controlled by a module or TCON Board FRC module is determined, the transistor which is active or inactive.

On the modules provided a TCON connector that has a pin that much to be connected to the main board. This module is usually closed aluminium to avoid interference.

4. Main PCB/Main Board

The function of the module in the main board is to process all signals that either an audio or video that is captured by a tuner. Still remember how to work the TV not CRT, where images are processed by the main IC got fed into a series of RGB Video amplifier for later given directly into the tube CRT.

In contrast to the workings of TV CRT, LCD there is a process to convert analog signal video signal into digital form – due to the presence of thousands of pixel transistor controlled by modules TCON.

On the main module includes tuner, analog to digital converter, mikrokontrol, determine which input is used and a variety of other TV functions.

Because there are still many parts of the LCD TV that has not been described, then this article will continue to section 2, ... may be useful

Motion Sensor Components In Electronics

Perhaps we never got into a huge mall with automatic door open as we approach the door? that is one of the application components of the motion sensor in the electronics. Components that can detect movement commonly referred to as PIR or Passive Infrared Sensors.

PIR sensors can detect small movements of this and also feel if there is any man who moved out of range sensor.

For those of you who do not know this motion sensor PIR, its small, low power consumption and not easily worn away with quite a hefty hargayang. Also called PIR is also called Pyroelectric IR or motion. Not to be confused with the light sensor that yesterday I had a chance to discuss also, both are often used in a series of sensors. This is a form of censorship of PEARS:

How does it work? PIR motion Sensor works by measuring infrared energy that is detected by sensors that exist therein. They do not emit infrared itself so it is referred to as passive. Whereas in ordinary IR sensor, usually needed an infrared beam/laser as an indicator of the existence of light detected. Think about it like this way of working motion sensors:

Infrared energy is produced by heat, humans and animals including can produce heat even though small, an average rate of 9-10 micrometer infrared energy.

Usually range motion sensor this can reach 5 meters. Quite effective as a motion sensor is not it? Also note how the image above, this sensor PIR can't detect how much the number of people who were in the area range of the sensors, can only feel a change in heat energy/infrared only.

How much is a motion sensor PIR? If you are interested in based on the info I get the price could range anywhere between 200 thousands. Quite expensive, but in the hands of people who are creative, can be useful tools/missing .

Knowing The Value Of The Resistors Burned

Various kinds of damage to the TV is very likely to happen and not even frequent there are components that are on fire, to find out the value of the resistors burned I have little tips.

Surely we as techs often confusion how when finding a resistor that his condition had been burned in a series of PCB TV so it's not possible to know/to read the value of the resistor.

To be able to apply the techniques that I will need to first outlines we know how the heck the structure/offal from these resistor component itself?

According to the definition, his special kind of carbon Resistor is a very commonly used consisting of a resistive element that has hindered nature/forms such as tubes and has a metal lid has a wire at both ends.

This carbon wrapped wire on both ends and then soldered and printed color code. About like this structure the appropriate definition of offal resistor above:

Can be inferred from the value of the resistor is the value of the carbon that is wrapped by the upholstery of the resistor itself isn't it?

So if we find a resistor burning and trouble finding its value then we can split the 2 resistors with pliers cutters and then we measure from the carbon pieces to the legs of the resistor that is still intact. Likewise with carbon the other. And then both of them combined.

No doubt the result is not accurate because after all the resistors are burned, but at least we have a reference value. Value added this myself would not show the actual values benar2. Therefore after summing the value of both pieces of burning resistor resistor value should assume the most approaching, list the value of the resistor that is commonly seen in the value of the resistor that exist in the market.

And of course the most important see also where the resistor is mounted in series. For example, if we find the value of the resistor with the above trick discovered the value of 100 k. But in the series resistor is used as a Fuse Resistor that is usually worth 0.1 – 1 Ohm, so we should really observant .

Hopefully the article about knowing the value of the resistors burned this is helpful to fellow technician

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