Buenos dias perry
Regresé con este amplificador, cambié el lm5110 y tengo una buena señal en uno de entrada y salida y en el otro solo tengo una buena señal hasta la resistencia antes del diodo, me di cuenta de que al alimentar con el RCA y una señal de que hay CC en las salidas, sin embargo, sin la señal no hay voltaje
Regresé con este amplificador, cambié el lm5110 y tengo una buena señal en uno de entrada y salida y en el otro solo tengo una buena señal hasta la resistencia antes del diodo, me di cuenta de que al alimentar con el RCA y una señal de que hay CC en las salidas, sin embargo, sin la señal no hay voltaje
sorry I chose bad translation
I returned with this amplifier, changed the lm5110 and I have a good signal at one of the input and output and on the other I only have a good signal until the resistance before the diode, I realized that when feeding with the RCA and a signal that there is DC at the outputs, however, without the signal there is no voltage
I returned with this amplifier, changed the lm5110 and I have a good signal at one of the input and output and on the other I only have a good signal until the resistance before the diode, I realized that when feeding with the RCA and a signal that there is DC at the outputs, however, without the signal there is no voltage
I continue with this amplifier and still do not understand why there is no good signal at U2002 at the input of the IC only a good signal arrives until the resistance R2014 before the diode D2017, exchange the IC that works correctly as well as the diode without changes, I have noticed that moving the master slave switches tries to build the wave from the side of the IC that is not generating the signal, also by moving the infrasonic filter switch to the off position I get dc at the output when injecting audio into the rca inputs
I remember very little about this old thread so be prepared for me to ask questions that I've already asked.
Do you have a clean signal reaching the class D driver board?
Are you testing without rail voltage?
Did you jump the feedback for the class D circuit?
Which class D driver board do you have?
Do you have a clean signal reaching the class D driver board?
Are you testing without rail voltage?
Did you jump the feedback for the class D circuit?
Which class D driver board do you have?
Good morning Perry
I returned to perform the tests that you have indicated to me throughout the post and without rail voltage and with the skipped feedback I have a signal on the output transistors, with rail voltage I do not get anything I only get signal on the ic u2000 both at the entrance as in the output in u2002 I only get a signal until the resistor before the diode that is at the input of the IC, what I have noticed is that when I move the slave master switch I get a wave signal at the outputs but I also get dc at the outputs , I am already without ideas of what else to review, to see if you orient me please
I returned to perform the tests that you have indicated to me throughout the post and without rail voltage and with the skipped feedback I have a signal on the output transistors, with rail voltage I do not get anything I only get signal on the ic u2000 both at the entrance as in the output in u2002 I only get a signal until the resistor before the diode that is at the input of the IC, what I have noticed is that when I move the slave master switch I get a wave signal at the outputs but I also get dc at the outputs , I am already without ideas of what else to review, to see if you orient me please
Perry when I move the master and slave only switch I get a signal in u2002 and output transistors only at the moment I slide it and then it turns off and if I leave it between master and slave, it will be the switch that is causing the problem, you know its configuration for leave it in one position?
ok I understand that there must be a signal on the doors of the mosfet regardless of the position, changing the tl072 increased the current consumption from 2.63 amps to 4.23 amps and I don't receive cc at the output when I slide the switch, I don't remember if it was at all the outputs that had a signal, I remember that the outputs with the lm317 regulator had a signal, the others I do not remember if I tried them but now that I get home I can verify and confirm. Do you have any image of what the output waveforms should look like in this amplifier? Besides that I can verify to isolate the problem and I changed the lm5110 because I know that my problem is that the outputs do not have a signal in the gate but I still do not find that it is blocking the signal and because it only reaches the resistance in the u2002 and the u2000 has its correct input and output
good night Perry Without the regulators and closing the feedback cycle, I only have a signal in the 4 mosfet that are next to the regulator Q2011, Q2014, Q2013 and Q2015 in Q2006 and Q2008 I get the second the second signal with noise and in Q2007 and Q2009 I get nothing. I attach photos of the signs.
Attachments
Correct Perry, the entry in both 5110 looks the same in both voltage and signal, both ic already changed them thinking they were to blame, but nothing, as for the output, the voltages vary little and the signal a little, but what I see well. Well, I attached the images.
U2000
Pin 1 0.77V
Pin 2 1.73V
Pin 3 0V
Pin 4 1.73V
Pin 5 6.99V
Pin 6 7.93V
Pin 7 10.5V
Pin 8 7.93V
U2002
Pin 1 0.69V
Pin 2 1.73V
Pin 3 0V
Pin 4 1.73V
Pin 5 6.98V
Pin 6 7.78V
Pin 7 10.5V
Pin 8 7.78V
U2000
Pin 1 0.77V
Pin 2 1.73V
Pin 3 0V
Pin 4 1.73V
Pin 5 6.99V
Pin 6 7.93V
Pin 7 10.5V
Pin 8 7.93V
U2002
Pin 1 0.69V
Pin 2 1.73V
Pin 3 0V
Pin 4 1.73V
Pin 5 6.98V
Pin 6 7.78V
Pin 7 10.5V
Pin 8 7.78V
Attachments
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