Which pin of which IC drives audio into the 4080? Pin 7 is the audio input of the 4080.
What's the amplitude of the triangle waveform on pin 6 of the 4080?
What's the amplitude of the triangle waveform on pin 6 of the 4080?
Post a photo of the distorted waveform.
Does this amp use a jfet for protection like the Fusion FP9001 amp?
Does this amp use a jfet for protection like the Fusion FP9001 amp?
Is that capacitor that you initially replaced but reinstalled within tolerance?
That triangle waveform shouldn't be distorted like that. Are you sure that you were using a good ground reference?
That triangle waveform shouldn't be distorted like that. Are you sure that you were using a good ground reference?
Use the ground pin for the 4080 as the ground, using the short ground clip lead that clips into the end of your scope probe.
The triangle waveforms using the VDD pin on 4080 vs circuit board ground.
If I pull the lm837N by theory there should not be a triangle wave form on pin 7 or if I just pull pin 8 on the op amp
If I pull the lm837N by theory there should not be a triangle wave form on pin 7 or if I just pull pin 8 on the op amp
If you do nothing more than take the input signal from the amp, you should have no signal on pin 7 of the 4080.
Photo of the distorted output signal?
Photo of the distorted output signal?
You have a square wave on pin 8 when lifted because you opened the feedback loop.
What happens if you just remove the input signal?
What happens if you just remove the input signal?
where would I remove the input signal or are you referring to audio input in that case it’s removed
There shouldn't be any signal into pin 7 of the 4080 with no input to the amp. Is the amp in it's normal, complete configuration as it would normally be (no mods)?