Sharp

Sharp was founded in 1912 in Japan. The name comes from one of the first inventions of the founder Tokuji Hayakawa, 1915, the Ever-Ready Sharp Pencil, invented a mechanical pencil. From 1925 Sharp has produced crystal radios, tube radios from 1929. Since 1953 TV produced in series. In 1962, Sharp to build the first microwave ovens, and in 1963 started the mass production of silicon solar cells and photovoltaic cells. 1964 built Sharp one of the first transistor-based desktop computer, in 1969 the first computer with LSI circuits, the QT-8D, 1971, on the electronics of the QT-8D-based first portable electronic calculator EL-8 and 1973, the first LCD calculator. In the 1980s, Sharp was instrumental in the development of portable computers, not just for IBM-compatible laptops were the so-called programmable in BASIC pocket computers known. 1981 Sharp managed the mass production of laser scanning for a CD player.

LG

The LG Group is a diversified company headquartered in South Korea in Seoul. In Germany and Austria, especially the daughter of LG Electronics bekannt.Das Korean company that now ranks among the world’s leading electronics companies, was founded in 1947 by In-Koo hwoi (aka Yonam) as “Lucky Chemical Industrial Co.” was founded. The first product was a cosmetic product, “Lucky Cream”. Yonam wanted to make as a cheap package for its creams essay, he began abruptly with the production of plastics. Later came combs, soap cups, toothbrushes and tableware. In 1958, the “GoldStar Inc.” was founded a year later produced the first Korean radio. The now well-known brand name is an abbreviation of the interim trade name “Lucky GoldStar” LG shortly.

Samsung

The Samsung Group is the largest South Korean conglomerate (chaebols). The Samsung Group employs more than 250,000 people and it is among the world’s largest company measured by sales and market strength. Samsung in South Korea will pay 5 billion euros in taxes, representing 8 percent of government revenues, and denies a fifth of South Korean exports. The name of Samsung in Korea means “three stars” and represents the three sons of the founder Lee Byung-Chull. President of the Samsung conglomerate, Lee Kun-hee was the third son of the founder, who resigned in a major scandal in 2008 as chairman of all items. Since then, the Samsung Group is led by the CEOs of each company. Samsung Electronics is the flagship of the group, the largest TV manufacturer and second largest mobile phone manufacturer in the world.

Samsung LE40C650 40-inch LCD TV

LCD TVs souped-up with LED backlights have taken over from ‘normal’ LCD TVs, correct?
Not if this model from Samsung’s Sequence six is anything to go by; packed using the brand’s extremely latest multimedia functions and on-line trickery, this 40-inch LCD Tv sports excellent photos and an all-round usability that helps put the ageing liquid crystal show tech back on the map.
Available for around £800 on-line, the LE40C650 features a Full HD panel alongside HyperReal picture processing, a Freeview HD tuner, Samsung’s personal Internet@TV online platform and AllShare DLNA streaming over a house network. Not poor to get a ‘budget’ Tv.
Regardless of that tempting haul of features, the LE40C650 is actually close to the bottom of Samsung’s line-up for 2010. For £200 or so much more, the step-up C750 Sequence adds 3D compatibility and 200Hz Movement Plus, but small else, while Samsung also makes 4 separate ranges of LCD-LED TVs and plasmas.

Toshiba RV635 Series LCD TV (32", 37", 42")

Manufacturer's Description

32" REGZA RV635 offers a Full HD 1080p ready LCD TV, blending superb picture and audio quality and delivering it in a stylish high gloss black design. The 32" RV635 provides Toshiba's acclaimed Active Vision II picture processing technology delivering stunning images from any high definition or standard definition source as well as featuring Resolution+ technology which enhances edge detail and texture to upscale high definition content to near high definition quality providing clearer, sharper, richer images.

Sharp - AQUOS 70" Class

This HDTV features full 1080p resolution for exceptional detail and picture clarity. The Quattron quad pixel technology adds yellow to the traditional RGB pixel format, enabling a wide array of vibrant colors on the screen. Connect to the Internet via built-in Wi-Fi.
Smart TV

Get a world of instant entertainment on this smart TV. Connect to the Internet and stream movies, listen to music and access a wide variety of other content on your HDTV.

What's Included

    Sharp AQUOS 70" Class / LED / 1080p / 120Hz / HDTV
    Stand
    Owner's manual

LG time macine TV

Creative visual translation of the basic product proposition: 24-hour live recording that makes TV run on your own time.

Data travo flyback 154-177B and its equation

Pin functions:
1.  H (Colector)     2.  180V      3. B+110     4.  GND      5. 12V      6. 24V      7. 40V                          8. ABL       9. HT(Heater)      10. AFC
Equation : 154-064P   FCK-14B047   JF0501-1206   JF0501-91802   154-374A   6174Z-6238L
FCM20B058   FCM14047   FCM20B009   FCM14B009   6174V-6006D   6174Z-8003A
6174Z-8004R   FUY20B009

JVC image dark, normal OSD and sound

This TV comes with symptoms: a dark image but the OSD (On Screen Display) and Normal Voice. If you've had, this is exactly like the damage that often occurs in TV Sony Chassis BG-2S caused the ABL resistor open.
But despite its symptoms look the same, but the cause is completely different.

Initially we also thought that the damage must be on the ABL, but After measurements were taken both on the voltage and its supporting components reveals no problems in this area of ​​the ABL.

Power amplifier BTL

Audio amplifiers operate either in a BTL (bridged) or single-ended ("normal") configuration. In the single-ended setup, the output lead goes to the "hot" or "+" side of the load (speaker or speaker box since we are talking audio) and the "-" or "negative" side of the load is tied to a common ground shared with the amplifier. In the BTL configuration, one amp is connected to the "+" side of the speaker (load) and a second amp is connected to the "-" side of the load. For this to work, the output signal from the second amplifier must be a "mirror image" (identical in every respect, but 180 degrees out of phase) of the output from the first amp. The BTL configuration is most often seen in low-voltage, battery-powered applications (like cell phones or "walkman" type personal tape or cd players etc) or in automotive applications over about 10 watts per channel.

In the BTL configuration, each amp drives half the load impedance. With the signals being out of phase, the voltage swing across the load appears to be doubled, and with each amp driving half the impedance the current is doubled. In theory the bridged pair will produce 4 times the power into the load that either amp acting alone could provide. In reality it seldom works that well.

This is an power amplifier circuit of a BTL system, which comprises a first op-amp chip which outputs an output signal having a same phase as an input signal input to a signal input terminal, a second operational amplifier which outputs an output signal having an opposite phase to the input signal, a voltage divider which generates a midpoint voltage of the input signal, a first resistor connected between an output terminal and a negative phase input terminal of the first operational amplifier, second and third resistors connected in series between the negative phase input terminals of the first and second operational amplifiers, a fourth resistor connected between an output terminal and the negative phase input terminal of the second operational amplifier, and an impedance converter connected between a midpoint voltage node of the voltage divider and a series-connection node of the second and third resistors. (end of abstract)

List Componet:
R1, R2,R3, R4, R6..................... 10kOhm.
R3............................................. 20kOhm.
C1, C2, C3, C4........................... 10µF.
Catu daya (VCC) ±12 V.



source : http://elektroarea.blogspot.com