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LCD TVs - LED
TV PLASMA LG 50PQ60-UA does not turn on
220
hace 5 años
hace 5 años
greetings to all and happy year, one of my tv is damaged and does not turn on, I opened it and check the voltages of 17, 12v and 5v in the comb P813 and these are not found, when you connect the source to the current you can hear the relay and immediately it is deactivated, that is to say, it clicks twice with a second of space, within the doubts that were generated it is if I have to bridge some pins so that some of the voltages appear, I hope someone can support me with the diagram of this source the number is 3PAGC00002A-R
Checking a bit the most common rectifier and transistor components are not short in my opinion, the PWM regulator gets 12v at its input but I am not sure if it is operating correctly
THANKS
31
hace 5 años
hace 5 años
Hello friend, check if the source has a pin that has 5v and another pin that says on / off if you have them bypass them and if it gives you the voltages it means that your evil is in the bad card and if it doesn't give you anything. Voltages your evil is at the source
22.858
hace 5 años
hace 5 años
If the relay is opened, you have a short one, what is most damaged is the ysus and zsus card, disconnect these cards from the source and check if it already gives you the tensions, if it gives you tensions you have one of the 2 damaged cards, connect one and then the other to see which one gives you the problem.
6.567
hace 5 años
hace 5 años
Good afternoon, to verify the source you must verify the voltages at the source, the 5v, 17v plus the VS and VA voltages, which are responsible for feeding the Y sus and Z sus cards.
6.567
hace 5 años
If you disconnect all the connectors from the source, and connect it to ac, the voltage Vs and Va, 5v should appear in the respective connector, but it appears that the source is bad.
6.567
hace 5 años
There should be 5v voltages, go, vs on the large connector, but the source is the one that has problems, obviously without any plugged in.
hace 5 años
hace 5 años
In the source of power come the voltages of vs and it goes Czech that they are the correct ones to check them disconnect them from the source
220
hace 5 años
If the main regulator actually changed and the source was normalized, only that it also had a problem and its two 30f124 shortly changed them to 45f127 and the screen began to give normal image, what I only notice is that in the hey a bubble as I don't know how to explain it correctly, like a swing but the screen is working so far.
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