Today I did this test that I show in the image lifting a leg of the components marked in red and measured with the multimeter and gave me continuity between + and gnd, this should not happen but I am not wrong? Flyback in short or is there anything else that may be escaping me? Photo:
I have reviewed voltage on the IC801S which corresponds to the integrated 3S1265RBV for it I took as ground the negative of the main capacitor of the source and the results were:
paw 1-No stable voltage when measuring in continuous scale 600v the result is an oscillation but there is no measure of stable voltage
Paw 2-0v
3-12v leg
pata 4-0v
5-0v paw
it measures the transformer between continuity between 3 and 4, it should give you a superb resistance, only compared as if you hit the two ends, if it is ok, the vcc has 13v, ok, and the pin5 has to have voltage if the source is oscillating, the IC, but, it measures each element separately, mainly the zener that has to do with pin 5
I missed a detail, it turns out that the horizontal transistor out of the plate measures well but put on the plate I get a beep from the multimeter between emitter and base collector, which would indicate a short, now the million dollar question How can I corner the fault to know exactly where the short is triggered?
In the transformer between pins 3 and 4 I get a beep from the multimeter, and between the main capacitor of the source and the leg 1 of the 3S1265RBV and the positive of the main condenser of the source I get a beep, which would indicate that the route would not be " open".
Hello friend look up, I updated the question and uploaded a photo of the test I did and in the same photo and the comment I put with her I tell you what I got as results to see what you think of my test. Thank you.
At the source there is a 3S1265RBV whose measurement results I just put up. Thank you.
CHECK THE OPTOCOUPLER, CHECK IN THE SECONDARY CONTROL CIRCUIT, CAN THE Z431, REGULAR ZENER THIS SHORT.
THE SOURCES OF THIS INDOLE ARE ALWAYS SAVING A VOLTAGE, THE OTHER, YOU CAN REMOVE THE TIN, THAT DOES NOT TOUCH THE COPPER VENITAS, IF IT STARTS THERE, YOU HAVE A SHORT CIRCUIT IN OTHER VOLTAGES NOT CONTROLLED
Where I do not have stable voltage and if I was wrong I should have it is the leg 1 of the 3S1265RBV that corresponds to the drain, I do not know in this model if it is the same but I know that in other models in the leg 1 there must be voltage and I can not see the why the oscillation when measuring.
Based on that if I put to measure the negative of the multimeter in the - largest filter and the most in said leg 1, I put up a piece of the outline of that zone which can originate that there are only oscillations and no stable voltage in that leg if the route I see is relatively short from the + of said capacitor, as I see it goes from the positive of the capacitor through the transformer from its leg 3 exiting the 4 and in condenser there are the 320v
To get rid of all doubt, I removed the flyback from the plate and I have a multimeter beep between + B and GND which makes me assume that the problem of the TV is that and when being short the flyback did not let work to the source and by I do not have the correct voltage on pin 1 of the IC801S. A warm greeting and thanks for your help.
