tv crown mustang cm5721av chassis px20076-3c does not receive well
friend, you already measured the tuning pins in the tuner, 33volt. + 5volt and 4.7 volt. in the agc.
The 33v doesn't reach me 24 friends the others if they are normal where I look. one question may be that flayback problem or it has nothing to do
friend. Flayback has nothing to do with me, better check that 33volt line. it may be that the zener diode that commands the 33volt. this leaking
because the tv works well, it only has that problem, my friend, what seems strange to me that in the + b I have 90v and if I raise the voltage I take it to 105v it makes some stripes arrives as if it uncalibrates the vertical but when uploading it to 105v the same does not improve friend
friend. lower it to 90v. and enter the menu and give it reprogram channels to open what happens
Ok and tell me what happens with I have 90v in the + b with the TV on and I tell you if I raise the voltage to 105v does not improve and lines up as if the vertical suffered
I did not do it with the 10 tuners that I tried, I put a self-program on it, but with some tuners it looks good but it tunes to channel 52, that is, I am missing 14 channels that do not directly tune them. now with the tuners that tunes all the channels with those I have the problem of 10 channels with a little rain buddy
friend. I don't know but here in my place the cable company has disconnected several channels, what you can do is try another TV. open if in that program all those that you are missing in that tv. to see if they are not disconnected by the company
I have 3 TV and it works well, my friend, this has disintegrated me because all the tuners that I tried, I could not correct the problem now, the issue is if you can tell me this TV model that tuner takes because if they put any that I do not know but The strange thing is that with everything I did I did not manage to correct the problem, the only thing left is to review the 33v line as you say, my friend, because it cannot be that with some tuners that are flat TV or Slin I tune in 52 channels and no 66 don't know friend tell me
friend. Since I didn't find a diagram with that chassis number, look at the number of ic. which carries the tuner inside, and you look at the other selectors open if they have the same integrated
of all they have 3 but they are different code that is in the body they are the same but different codes friend but with the tuner that brought the tv also does the same thing, friend
friend. try solving inside the tuner that had the one that brought the TV. and you put it back
Hello friends sorry for taking a while to comment. well, I went into service mode and the AGC was 18 and I raised it to 30 and there I receive all the channels either, that is, the problem was fixed. until there everything was well removed to the TV but the next day they brought it to me because I stay in blue screen mode and it stuck on channel 1 and did not change the channel and did not tune any channel when I put on the auto program I did not see a good signal there this tv will change eepron. micro. capacitors and nothing but good thanks everyone. I will continue with this TV later, there will be another post for another TV