You'll have to isolate the FETs to test individually. You can do this by lifting the gate leg or sliding the 10 ohm gate resistors off of the pads. Do not apply power with the gates out of the circuit.
As a side note, we need to try defeating the protection circuit on the 'bad' channel when we get past this problem.
As a side note, we need to try defeating the protection circuit on the 'bad' channel when we get past this problem.
What do you think could have happened? That many FETs don't fail easily.
Iam not sure. Maybe I touched something or shorted something while reading the voltages? Iam not really sure.
Is the 'good' channel producing clean audio?
When comparing the two channels, initially do as much as you can with resistance/diode-check with no power applied.
Set the bias fully CCW for testing. If the FETs start to heat up, they can quickly fail if not clamped to the heatsink.
When comparing the two channels, initially do as much as you can with resistance/diode-check with no power applied.
Set the bias fully CCW for testing. If the FETs start to heat up, they can quickly fail if not clamped to the heatsink.
I clamped it back into the heatsink to play it safe.
The good channel is good again! The bad one is still bad. I did notice that when I was playing audio on the good channel the voltage went up across the resistors to 2.4* vdc and on the distorted channel it was only around 2.14 vdc
The good channel is good again! The bad one is still bad. I did notice that when I was playing audio on the good channel the voltage went up across the resistors to 2.4* vdc and on the distorted channel it was only around 2.14 vdc
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