Led Tv Backlight Strip Tester Circuit Diagram

This device provides the various voltages we need to test backlight led arrays or single led s.

Led tv backlight strip tester circuit diagram. Specially designed for the majority of electronic. This kind of problem usually caused by one of the bad backlight led in the led bar. Once the cover was opened i could see three circuit boards i e. Multifunction adjustable led lamp beads service tester is a test and maintenance equipment led lamp beads.

The zener diodes are included in the circuit so it can also be used. Here are available some popular smart universal led tv board schematic diagram and service manual that is easily available to download for free. With just one bad led the tv will shut down thus no picture can be seen. If we reference the chart above it appears that the current draw will drop from 120 ma per led to about 40 ma.

A very usefull circuit for every tv technician. Will the leds still run at 2 75v. You can easily increase that number by using a higher supply voltage. Adjustable boost converter high voltage boost converter led tv backlight tester mc34063 circuit tv repair tool.

Posted friday april 26 2013 shares. This circuit can be used to test up to three leds at once connected in series. If you do so you should allow 2 7 v for each additional led. Because in a 12v led strip there are 3 leds and a resistor in series supplying 11v instead of 12v is a bit like reducing the voltage for each led by 0 25v.

This device provides the various voltages we need to test backlight led arrays or single led s. Today i will give you a collection of all smart universal brands lcd led tv board schematic diagram circut diagram. The power supply board main board and t con board see the photo below.