Source TV BGH LCD MOD 47 BL4709S
Hi, I measured the voltage at C 903 and gives 302 Volt. Then I measured in the traffic and in LNK 564 and it does not matter but there is no output voltage in the traffic. I'm afraid the regulator is not working. Then I injected 5 Volt into the C907 and the Stand By voltage appeared, I pressed and hit the relay and the three sources were tense. Place the board and the TV turned on without problem and it was 12 hours running. For me it is the regulator but I would like if they indicate me some other measurement that guides me more. Thank you.
Hi; I already found the solution at the end was not the AC / DC converter LNK 564, what was wrong was the diode indicated on the circuit as VD 902 type 1N5819 which in my source was actually a FR 104 fast recovery diode 1A - 400 V , I measured all the diodes and this gave bad measurement, I changed it and the source started. I asked the question because what struck me the most is that there was nothing burned in sight or even the fuse, that is, there was no violent short and also as I explained, feed with 5 external Volts and turned on the TV. Thank you very much for the circuit and the indication.