Led Tv Backlight Strip Tester Circuit Diagram

This kind of problem usually caused by one of the bad backlight led in the led bar.

Led tv backlight strip tester circuit diagram. With just one bad led the tv will shut down thus no picture can be seen. These two examples of 3 leds and 6 leds show how a typical 12 and 24 volt led strip is configured. Because the led strips utilize 3 volt led devices and are configured to have multiple parallel strings of 3 or 6 leds. The power supply board main board and t con board see the photo below.

Sailen das tv reaparing 53 599 views. A very usefull circuit for every tv technician. 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. This device provides the various voltages we need to test backlight led arrays or single led s.

Adjustable boost converter high voltage boost converter led tv backlight tester mc34063 circuit tv repair tool. Leds use dc voltage to work unlike normal leds the high power leds that used in tv works at 3vdc per led. A very usefull circuit for every tv technician. Once the cover was opened i could see three circuit boards i e.

Until i shone a flashlight straight into the screen and saw an image i had no. Led light tester making only 50rs duration.