Sabtu, 16 Februari 2013

First time TV service

First time TV service
Electronic Components is the smallest part of an electronic circuit, or electronic components can be said to be the elements that make up an electronic circuit. If the electronic circuits that have a specific function are collected and form an electronic system, the electronic system is called a plane, for example: Aircraft Television formed from a collection of circuits that has a function as a tuner, IF, AGC, etc.. Electronic components that make up a television receiver, and there are a variety of different types, here the components are grouped by type for easy to search. Each component is discussed and described in detail, where any discussion of how characteristics include, among others, what basic ingredients, how the physical form and how the schematic drawing, how to find persamaanya if you can not find the same components etc, besides every ahir description is also shown what damage possible and often happens on these components, so it can help in the repair process. The components that make up a television set, among others: Passive components Resistors, Variable Resistor, Capacitor Active components Diodes, Transistors, ICs Inductor / Transformer Inductor, Transformer, Coil, Degausing Coil, Yoke, Flyback Transformer Display Seven Segment, CRT, LCD, Plasma Display Special component Relay, Opto Coupler, Cristal, Cristal Filter, Saw Filter, Delay Line Television is a broadcast tentacle picture. Word comes from the word tele television and vision; away with their respective sense (tele) and visible (vision). So mean visual or television can be seen from a distance. Findings television wheels aligned with the findings, because these findings could change the world civilization. Beginning from television of course can not be separated from the discovery of policy, law of electromagnetic waves discovered by Joseph Henry and Michael Faraday (1831) which is the beginning of the era of electronic communication. Then a row found cathode ray tube (CRT), the black and white television and color television system. Certainly the development of knowledge will continue to grow especially with the discovery of the LCD, which makes the TV in this day and age getting thinner with the photos that are not less good thing with the TV tube.

So at this time we should know very well about the TV system because almost all households have good black and white TV or a color. the types of damage and I know the damage:

Good Tips Techniques Basic Service TV BASIC AND ANALYSIS TECHNIQUES AND HOW TO FIX IT Here is a basic technique to analyze how the damage to the television: -The types of damage and I know the damage: 1. Totally dead. if the television suddenly dies, the first thing to do is: a. open smua existing couplers. b. see if the fuse / fuse broken, if broken try to replace with the same size trus ampere turn on. if the fuse broke again means local power supply is defective. The fix: Try measuring the besar.ukurannya elco 100uf/400v.ukur usually alternating avometer use a scale of 10 ohm.jika both disconnected likely broken diode or transistor. - Try test / measuring diodes that are near the switch on / off, there are 4 pieces . use avometer on a scale of 10 ohm.ukur alternating balik.jika rusak.ganti connect with both mean the same size. - Try measuring transistor large, footed tiga.ukur leg number 2 and 3 alternating use a scale of 10 ohm.jika avometer means rusak.ganti connect both with the same number. - If the measured elco already disconnected mean suply already bagus.coba turn on again - If still want Flash ndak try measuring the existing horizontal transistors deket plyback.caranya replace damaged diatas.jika equal with the number who tried to turn on lagi.insyaallh tv sama.trus can dah flame. Search Procedures Damage Efficiency measures required in the repair procedure is as follows.

1) The state of disorder known When receiving a TV that would be serviced, listen / check damage from consumer to facilitate easy inspection.

2) Estimate of Damaged Block The TV is turned on, set the controls noise, contrast, brightness and color. See symptoms appear on the TV screen for guessing which part is damaged. Make appropriate estimates of damaged block table damage.

3) Divide A Damaged Blocks Despite a series of suspicious has been determined, but the area being examined is extensive. Therefore, the more efficient the damaged part to be found if the area being examined more limited.

4) Find the section of Damaged After creating a suspected area more narrow, measuring voltage and resistance using Multitester. Block TV Color television system using three signals to work perfectly, the three signals are: • Signal sound carrier (FM) • picture carrier signal (AM) • Signal luminance (brightness) and chrominance signals synchronization (carrier color) In general, these signals are known as Signal Audio, Video Signal luminance (brightness) and chrominance signals Video (color), and thanks to the three signals allow us to see color images and hear sounds. The three signals are processed by different circuits, in which each series are grouped by function, but today most television is used in circuits that pack in an IC / Single chip that can hardly identify which parts of its part again unless we have a question or television schematic datasheets of Chip / IC is used. In addition to the three signal processing above, the television also has circuits horizontal deflection vetikal and useful for generating raster images on the tube, and - although it was not a major part of a television receiver - block remote-control circuit along controlnya also includes a series of very important the television generation. Here (in stages) discussed each function of blocks of color television sets where each block will be discussed in depth and detail, in addition to the discussion in ahir each block would show the symptoms if the block in question there is damage that will facilitate in the repair process. Below is shown a block diagram of PAL TV receiver. To go into further discussion you can right click on any image above or use the menu-in addition to the blocks or the link below Tuner RF amplifier, Mixer, Local Oscillator The series of Sound 5.5Mhz detector, Sound IF amplifier, FM detector, amplifier noise Circuit of Figure Picture IF amplifier, Video detector, AFT, AGC, Upholstery Video, Delay Line The series of Color Reproduction Amplifier Band-Pass, Element 1H delay, adder circuit-Deduction, phase switching circuit 180, Upholstery burs, Oscillator 4.43Mhz, UV amplifier, demodulator Synchronization circuit Toll Sync Separator, vertical pulse circuits, pulse circuits Horizontal Deflection Yoke Flyback Transformer Flyback transformer CRT tube Delta Type, Type In-Line, In-Line Type Trinitron The series of Power Supply Rectifier, regulator The type of Television Receivers Basically, television receiver system was divided into two, namely: Television black and white In black and white television images can not be viewed in accordance with the original color. Anything that looks dilayar glass looks just black and white. It is very different with color television, color picture that is displayed on screen will look similar to the originals. Color television picture we see on the television screen is a result of production from a camera. Object snapshot camera lens will be separated into three basic colors, namely red (R = red), green (G = green), and blue (B = blue). This separation results will be transmitted by television transmitter. Color TV transmitters emit signals: Audio (voice) Luminansi (image brightness) Krominansi (color) Sync (vertical / horizontal) Burst In color television receiver, all natural colors that have been separated into basic colors R (red), G (green), and B (blue) will be added back to the network color matrix to produce luminance signal Y and two signal krominansi, that V and U according to the following equation: Y = G+ 0.11BV +0.59 +0.30 R = 0.877 (R - Y) U = 0.493 (B-Y) In addition to pictures, television transmitters also carry voice signals are transmitted together with the picture signal in frequency modulation (FM) to avoid noise (noise) and interference. To transmit this signal, the transmitter and receiver must have the same color and sound. The system would have to follow a global standard and. In the picture there are several delivery systems, including: NTSC, PAL and SECAM.

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