Rangkaian pesawat televisi-TV circuit diagram
Sunday, February 14, 2010
Television how to Work? Before we know the working principles of the television set, it's good that we know little about the way ordinary objects images we see on the screen. The pictures we see on television is the result of production of a camera
Object images are captured camera lens will be separated according to three basic colors, namely red (R = red), green (B = blue). Results will be emitted by a television transmitter (transmitter). On television transmitter sestem, visual information that we see on the screen at the beginning of change of the object image into electrical signals. Electrical signal will be transmitted by the transmitter to the receiver (receiver) television.
WORKING PRINCIPLE TELEVISIPesawat television will change in the electrical signal received into an object image in accordance with the intact ditranmisikan object. On television in black and white (monochrome), the image will be formed in the production of color images in black and white with gray shadows. In color television sets, all natural colors that have been separated into primary colors R (red), G (green) and B (blue) will be mixed back in the circuit of the color matrix to produce an image signal luminasi.Selain, also brought the sound? Apart pictures, television transmitters also brings in the voice signal with the signal tranmisikan image. Broadcasting telavisi actually sound like the radio system but includes images and sounds. Radiated noise signal by frequency modulation (FM) on a separate wave in one channel transmitter with image signals. Modulated image signal similar to a radio transmitting system which has been known previously. In both cases, the amplitude of a carrier wave radio frequency (RF) is made varies with the voltage signal of pemodulasi.Modulasi is the fundamental frequency (base band). Frequency modulation (FM) used in the voice signal to minimize or avoid the noise (noise) and interference . FM sound signal in a television is essentially the same as in FM radio but not the maximum frequency swing but 75khz Standard 25 khz.Saluran and frequency transmitter in TelevisiKelompok set for a relay station for the signal transmission is called channel (chenel). Each has a 6 mhz channel in one field of frequency (band) is allocated for television broadcasting low-frequency fields komersial.VHF channels 2 to 6 from 54 MHz to 88 high-frequency field MHZ.VHF channel from 7 to 13 to 174 MHZ 216 MHZ.UHF channel 83 from 14 to 470 MHz to 890 MHZ.Sebagai example, channel 3 broadcast at 60 MHz to 66 MHz. RF carrier signal for both picture and sound are included in each channel tersebut.JENIS-TYPE SYSTEM TELEVISISistem television transmitter, as we know them: NTSC (National Television System Committee) PAL (Phases Alternating Line) SECAM (Sequential Couleur a Memorie) PALBNTSC ( National Television System Committee) is used in the United States, PAL systems (Phases Alternating Line) in use in the UK, the system SECAM (Sequential Couleur a Memorie) used in France. Meanwhile, Indonesia itself PALB system. Things that distinguishes these systems is the image format, the distance carrier and the carrier frequency of the sound.
TELEVISIRangkaian PARTS Power Supply (Power Supply) circuit serves to convert AC current into DC and then distributed to the entire series. Power supply circuit is limited by the white line on the PCB and the areas within the red box. Areas within the white lines is a series of inputs that are high-voltage area (live broadcast). Meanwhile, the areas within the red box is the output power supply which then distributes the DC voltage to the entire TV series.
Circuit tuner (tuner) This series consists of the amplifier high frequency (HF amplifier), mixers (mixer), and lokal.Rangkaian tuning oscillator function to receive signals in (TV waves) from the antenna and turn it into a frequency signal IF.
Amplifier IF (Intermediate Frequency) circuit serves as a signal amplifier to 1,000 times. The resulting output signal tuning (tuner) is a weak signal and that depends on the signal transmitter, receiver position, and the landscape landscape. This circuit is also useful to get rid of another wave of unnecessary services and reducing the interference of the carrier wave of disturbing sound image.
VideoRangkaian detector circuit serves as a composite video signal detector is out of the picture IF amplifier. In addition, this circuit also functions as a silencer all the disturbing signal because if there is another signal that will result in poor image quality. One signal that the damping is the voice signal.
Video Rangkaian amplifier circuit serves as a signal amplifier luminan from deteltor video so it can run a screen or CRT (catode ray tube). In the video amplifier circuit is also ABL (automatic brightness level) or a strong regulator of the automatic light function to protect the high voltage circuit of the load voltage due to more powerful light on the screen kaca.Rangkaian AGC (Automatic Gain Control) AGC circuit functions to regulate strengthening input automatically. This circuit will stabilize itself input television signal changing so the output becomes constant.
SinkronisasiRangkaian deflection circuit consists of four blocks, namely the synchronization circuits, vertical deflection circuits, horizontal deflection circuit, and the high voltage generating circuit.
AudioSuara series we hear is the work of this series, the sound IF carrier signal is detected by the frequency modulator (FM). Previously, this signal is separated from the picture carrier signal.
TYPES OF SCREEN TELEVISITipe Screen CRT TV (catode ray tube) In this type of television screen looks more convex than other types. Technology CRT tube television with the oldest and most belong to the present continue to be used and developed. Despite new technologies emerge. CRT tube only contains a cathode ray tube (cathode-ray tube) are for comparison, the plasma consists of one million fluorescent tubes are so small.
Television Display Type PlasmaDalam principle, plasma screen consists of two sheets of glass. In between is filled thousands of cells, which contain hundreds of xenon and neon gas. Two types of long electrodes, address display electrode and a transparent electrode, stretched between the glass plates. When turned on the plasma screen, electrodes that intersect at the cell's electrical charge given by the computer screen to ionize the gas in the cell. This took place thousands of times in a split second. An electric current was passed gas in the cell and generate the flow of electrically charged particles that quickly, which stimulates the gas atoms release ultraviolet photons.
Ultraviolet photons interact with fosforKemudian, ultraviolet photons interact with phosphor which eventually release energy in the form of a clear-ray photons. Each pixel consists of three cells that separate sub-pixels, each with a different phosphor color, ie: red, green, blue colors will mix to produce uniform strength pixel.Untuk electric current flowing through the different cells, the control system will increase or reduce the intensity of each sub-pixel color. This is to generate hundreds of combinations of red, green, and blue are different. In this way, the control system can produce colors in a broad spectrum, there are approximately 16.77 million colors can produce a plasma screen. This is what makes plasma display very sharp images and clear.
