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Simple repair method for LCD flat panel television

In Electronic Infomation Category: S | on April 27,2011

Do not worry! Time! LCD TV, uses only horizontal and LT1206CT7 datasheet and vertical sync signals. No horizontal and LT1206CT7 price and vertical drive circuits, there is no horizontal and LT1206CT7 suppliers and vertical output circuit. Meet

it simply, it is how to reproduce the image? Using a liquid crystal display films, to produce the image, but not light itself, it needs a light source through the LCD, to shine. LCD TV to use, the backlight lamp high voltage power supply circuits. Inverter is high.

Inverter to +12 V or +24 V power supply, backlight into AC voltage required to light up the backlight. Inverter drive circuit, the brightness control circuit is from the CPU. Liquid crystal film can not repair damage, but the high-voltage inverters can repair damage.

Note: Some LCD televisions which used two inverters, and some only one.

LCD screen for high-voltage inverter the size of the different manufacturers, can not be substituted. Backlight lamp is not parallel, nor in series, several lamps, there are several high-voltage transformer output circuit, a few incentives to match the circuit.

A lamp fails, the control circuit to stop work incentives, can not light up display. Comparison of methods can be used to check.

Note: the same as the voltage inverter with alternative, if the voltage is not the same, it will accelerate the damage to the backlight and shorten the use of the backlight time.

In the LCD TV, the high-voltage inverter is a high-voltage, high current components, is the fault-prone parts. Easy to damage the power module. It is by the N-channel, P-channel MOS composed of tubes, similar to the line of ordinary TV output tube. Backlight lamp in the LCD screen, the screen components are generally can not be repaired, only replaced the LCD screen.

Note: Do not use the meter or oscilloscope, direct measurement of high voltage output of the inverter, this will cause damage to high voltage components, as well as personal injury.

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