tv daewoo DTQ20-V1FS CHASSIS 01n. It does not turn on
Good afternoon, surely the chassis must be CN-001N, complete the data if I am correct, the procedure is the same on any television that does not turn on, take out or remove the horizontal output transistor, measure it, remove the avalanche diode and measure it, make comments on your measurements. You can use a lamp in series to avoid any eventual that you do not want, connect a phantom load to the plus B (+ B) and comment results, you must measure 133 volts, any other number than this, the source needs to be repaired, or check more in depth remember you can't
Measure voltages from the pins or legs of the source transformer, nor can you measure voltages directly on the fly-back legs, I emphasize this, actually because I do not know where he is standing in the repair, so far he has not given much to be able to develop a diagnosis ...
Cheers
Comment ...
hello good afternoon. I commented that after having checked the avalanche diode and capacitors c804, c812, c814, c815c820 and c706 (and they are good) I took out the coil L805 to cut the 133volt that should reach the flyback and in doing so all appeared the voltages and turned on the stand by, then reconnected the L805 to power the flyback and cut the power of pin 6 of LA7841 and the collector of horizontal D2499, but it remained the same.
hello good afternoon. I commented that after having checked the avalanche diode and capacitors c804, c812, c814, c815c820 and c706 (and they are good) I took out the coil L805 to cut the 133volt that should reach the flyback and in doing so all appeared the voltages and turned on the stand by, then reconnected the L805 to power the flyback and cut the power of pin 6 of LA7841 and the collector of horizontal D2499, but it remained the same.