Hi all,
Amp powers up but no output.no oscillations on U2000 and U2002. Found Q2012 open. But I changed Q2001 and Q2010 as well. Also I changed U2000 and U2002. Now I am getting oscillations on only u2002. On driver board I changed 74hc ic also. Any help will be appreciated. Thank you.
Amp powers up but no output.no oscillations on U2000 and U2002. Found Q2012 open. But I changed Q2001 and Q2010 as well. Also I changed U2000 and U2002. Now I am getting oscillations on only u2002. On driver board I changed 74hc ic also. Any help will be appreciated. Thank you.
Which terminals do you see a square wave on U2002?
What's the part number on your class D driver board?
What's the part number on your class D driver board?
Yes I am seeing on pins 2 and 4 on U2002. Part number of board is 1325-52874-06.
When I remove T2000 then I am getting oscillations on U2000 also.
Pin 1: 0.598v
Pin 2: 3.7v
Pin 3: 0v
Pin 4: 3.8v
Pin 5: 1.1v
Pin 6: 3.4v
Pin 7: 1v
Pin 8: 6.5v
I am having 50v on CR1004 middle pin and -2v on CR1005 middle pin. Rectifier is good and getting oscillations on pin 1 and 3.
Are the negative voltages low or is it just the positive voltages?
What's the DC voltage on the terminals of U1000?
What's the DC voltage on the terminals of U1000?
The regulator transistors getting very hot. 5110 getting hot but not so much. Driver board is normal. I removed outputs out of the board just to make sure they are not leaky and pulling current.
Amp idles at 1.8amp. I just got all the voltages correct and with in a second they all drop. This happened only one time. Do you feel if main caps are bad?
I don't think so from the information so far.
Remove the 5110s to see if the voltages remain normal on the regulators.
It's possible that you have a bad driver transformer.
Remove the 5110s to see if the voltages remain normal on the regulators.
It's possible that you have a bad driver transformer.