Led Tv Backlight Tester Schematics

Once the cover was opened i could see three circuit boards i e. 3v is sufficient to turn on any led but is within its reverse break down voltage rating that is why i did not use the common 9v battery. Leds use dc voltage to work unlike normal leds the high power leds that used in tv works at 3vdc per led.

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Adjustable boost converter high voltage boost converter led tv backlight tester mc34063 circuit tv repair tool.

Led tv backlight tester schematics. If you are troubleshooting your led lcd or plasma tv to find out what the issue is these repair and service manuals will assist you to install your tv correctly or to discover what the problem is within your television. With just one bad led the tv will shut down thus no picture can be seen. This kind of problem usually caused by one of the bad backlight led in the led bar. A very usefull circuit for every tv technician.

The proposed circuit is based on the principle of pfm inductive boost converter concept. An effective led driver circuit for lcd back lighting application has been discussed here which utilizes the ic zxld1100 1101 1937 from zetex. One of the led strips went out and my screen went black. Led tv is the same as lcd tv the only difference is that lcd tv uses ccfl as backlight and inverter as driver board but led tv uses leds as backlight and boost driver board as driver.

Until i shone a flashlight straight into the screen and saw an image i had no. This one is quite simple a tester for an led strip for your tv repairs i had a bit of trouble with my led tv. This device provides the various voltages we need to test backlight led arrays or single led s. The power supply board main board and t con board see the photo below.

From replacing a power supply circuit board a t con circuit board or simply securing a loose ribbon cable connection these tv repair manuals will help you to fix your tv. Simple led tester schematic why 3v.