LG TV model 21fs7rl-sl shuts down immediately
suggestions.- 1.- check the b + .- 2 check the oscillation 15750 cycles. 3.- test the fllyback both externally and in the circuit, for the latter you need a power supply of 15 to 50vcd a vpp probe (it is in electronic community), and if possible an external oscillator, a black and white TV can be useful, this not to depend on the oscillation of the jungle. Comment that we have to locate. regards.
Dude you said you changed the vertical and you say that all the voltages are correct but it is my duty to ask when changing the ic did you verify that the vcc is coming to the vertical ic?
greetings colleagues about the ELECTRONIC colleague because I get tired of looking for the q16 and I do not get it and if correctly if the vcc reaches the vertical ic 40 volts the same is the stv9326 a detail that has me thoughtful colleague is that at the time of withdrawing the 200 volt cable from the screen cap plate the TV turns on and does not turn off and the screen is illuminated with a white light and delay lines
Hello friend, on LG TVs we can rule out the stage with problems with a few simple tests. To discard the horizontal stage, the diode D303 is solved, it is a 1N4148, one end is enough, if you do not turn off the TV and you get a horizontal line, your problem is in the vertical stage. If the problem persists, do the same with the D401 diode, thus discarding the X-ray protection. Finally, you can do the same with the R423, 82K, it is useful to discard the horizontal stage. I hope this works for you. regards
greetings colleagues thank you for your collaborations I tell you that the chassis does not bring the q16 I found a capacitor of 1000 uf x 25 volts in poor condition replace it and now they arrive at the vv of the vertical stv9326 16 volts but the tv is still turning off if I remove the ic vertical because the TV turns on and I can visualize the vertical line more when I place it again the TV does not give image the extra high voltage is heard but there is no video and it turns off immediately
Hi Alexander, did you do the tests I recommended? Although it seems that your problem is in the vertical stage, it is better to make sure. Then we can continue to help, having a clear idea of the stage in which the problem is. regards