Tv lg 21fj4a
Televisor LG 21FJ4AB
Televisor LG 21FJ4AB
Greetings. I guess all the voltages of the source are correct. According to its reading on channels with antenna it turns off and in video with some movie it works correctly. Check the capacitors that connect cold ground to hot ground, at source. If the duration in which it is switched off is variable, disconnect Q16 completely and try.
Hello, there is no variation in the image when tuned, such as variation in brightness or contrast or some other.
Hello colleagues, yes, all the voltages are correct and when it is on you do not see any variation in the image. I will try the suggestions they give me and comment.
Thank you.
Hello everyone, effectively when disconnecting the transistor Q16 the TV works "normalmete", I will concentrate on checking the associated components and the circuit of the abl, since by decreasing the brightness and with the Q16 connected the TV is held on. The source does not present any type of variations and its regulation is OK.
I greatly appreciate your contributions and, if someone can tell me how to value or give points I would also appreciate it because I don't know how to do it.
Greetings from Colombia.
Hello colleague: I'm glad you you already have the tv working ... don't forget the advice on checking the protections ... the X-ray may be working ... or the FR403 may be undervalued ... as I explained, try welding a R of 1ohm in parallel with the FR403 ... and then connect the Q16 and see if it does not turn off ... if you want to value my contributions you can do it under my first comment as (solution accepted) .... greetings!
Hi nicomena, indeed the problem was in the circuit of abl (devalued resistor) so the x-ray protection acted.
Replace it and go. Thank you very much for your input and I value you.