Problem with haier tv model HTAF21S looks half screen
friend. In that stage of the TV. you have reviewed the elements as diodes and capacitors
I removed the plate and started at the source I reached the horizontal stage checking the horizontal transistor that was not short, but without finding anything suspicious at the moment, as I said I found a cold welding near the 3 color transistors
Is the audio of the channels heard?
What do you see if you put a DVD through the auxiliary AV inputs
I measured the yoke and in the measurement of the green and yellow wire coils it gives me 8.3 ohms that would be the upper ones and between the blue and red wire it gives me 2.6 ohms
How to contribute to the forum: please indicate the procedure or what elements change to enlarge the screen?
I had already solved the entire part of the yoke connector and the board in general was already completely serviced for cold welds resolves fly and choper
At first glance the yoke is observed in good condition I do not see it sulfated but the coils of the horizontal are not internally, the strange thing is that it turns on in that way pro I do not hear any strange noise in any component of having short in the yoke should not present some symptom like noise or even smoke
friend already get it to turn on well but on blue screen that is without signal it has a little green screen at the top will be that it has problems with the demagnetizer screen or that they had already placed some type of magnet near the screen and damaged it a little, well finally the person in charge was a 250v 22uf capacitor that was totally damaged although it seemed to be in perfect appearance, as I had already checked the majority and I dedicated myself to check those that were missing to be discarded. thanks for the support
friend. If it has a strong magnetized signal, check the welds of the ic. vertical, or it may be that the ptc. this bad or also the socket is sulfated, if everything was fine it is like you say that some magnet has come close to it, or the screen suffered some blow
ok I will check everything to see if you can correct that last but I already tried it with your signal and it is working fine
today I finished the tv, fix what was magnetized, it was the ptc that was in poor condition marked me 177ohm being that it was 7 replace it with one of another 14ohms tv and I look good again thanks for everything