SOLVED Aion tight metal issue

[jimilee]

I’m having some issues and I’m confused about what function the diode serves. I have no audio past this diode and when I left the leg and audio probe it, nothing is getting through. Any help is much appreciated, there is little to no info on this bad boy.

 

[music6000]

I’m having some issues and I’m confused about what function the diode serves. I have no audio past this diode and when I left the leg and audio probe it, nothing is getting through. Any help is much appreciated, there is little to no info on this bad boy.

It looks like a handful of a circuit!.
Can you check for Continuity @ R1-100K VD pad & Volume Leg 1, Power must be unplugged!
Curious to know if Volume is controlling the lack of audio?????

 

[gonzo]

Are you positive you didn't put it in backwards? That would be my guess. Usually the line is where the stripe end goes. Not totally sure what's it's purpose is. Reverse voltage protection?

 

[music6000]

I’m having some issues and I’m confused about what function the diode serves. I have no audio past this diode and when I left the leg and audio probe it, nothing is getting through. Any help is much appreciated, there is little to no info on this bad boy.

Did you mean you lifted the Diode & it made no difference, that was my understanding?
What I mean by the Volume control is it maybe Shunting/ cutting the audio?

 

[jimilee]

Did you mean you lifted the Diode & it made no difference, that was my understanding?

Yes. The volume doesn’t control the audio at all, I wish that were the case.

 

[jimilee]

Are you positive you didn't put it in backwards? That would be my guess. Usually the line is where the stripe end goes. Not totally sure what's it's purpose is. Reverse voltage protection?

Yep. As a matter of fact, I removed the diode and put in another one.

 

[Robert]

I would assume the diode is some form of protection for the input of the opamp.

The circuit should work perfectly fine with the diode removed, it's just a buffer.

 

[jimilee]

I would assume the diode is some form of protection for the input of the opamp.

The circuit should work perfectly fine with the diode removed, it's just a buffer.

Thank you sir, I was wondering about that. I’ve never seen it implemented that way.

 

[Robert]

I've seen it once or twice, I think that was in other Amptweaker designs.

 

[benny_profane]

I've seen it once or twice, I think that was in other Amptweaker designs.

What is the point of that with a non-inverting unity-gain buffer? There's no current in that feedback loop.

 

[jimilee]

Removed them. Holy cow, this thing will peel the paint off the walls, it's insane!!!