When load connected I got good oscillations for 1 second then it went into protect and trying to pull current. Using current limiter so it stayed near 1.7amps and protect light flickers.
After trying with the load and after it gone into protect. Now without load there is no oscillations. I removed rectifiers and still no oscillations and this is without load on speaker terminals.
Do you have oscillation on the output pins of the driver board?
Is the mute line dropping fully to ground?
Is the mute line dropping fully to ground?
No oscillations on driver board now. Before applying load yes I had oscillations. 3 pin remaining at 3.2v. Even after removing remote.
That has to be VERY near 0v for the output drive to be present.
Is it producing drive to the power supply FETs?
Is it producing drive to the power supply FETs?
Without rectifiers there is no high side oscillations. Only low side oscillations. But from driver board I have oscillations on two pins. Also both the optocoupler has oscillations on pin 6
The high-side is likely floating but it could be that there is no signal.
With no rail voltage, you can connect the scope ground to the high-side source. Connecting a load across the speaker terminals will also generally allow you to see the signal if it's floating.
With no rail voltage, you can connect the scope ground to the high-side source. Connecting a load across the speaker terminals will also generally allow you to see the signal if it's floating.