Informant voltage request

[ElReverendoRyan]

Hey gang,

I’m getting a pretty weird squeal coming from my informant build, be it engaged or not (using the buffered output option)

Have put the solder bead as instructed in regardes to the charge pump.

I’m probing slowly but surely but once I start hitting the tl072s I get the squeal. I was wondering if anyone had the voltages I should be getting on the ICs so I can cross reference?

Thanks

 

[BuddytheReow]

What voltages do you have? Board shots would be appreciated too.

 

[ElReverendoRyan]

The board’s clean, just went over all of it, making sure there are no stray strands of wire etc. Reflowed most of the joints etc. I’ll get some pics up if nothing comes out of the voltages.

I get input fine until I hit ic1, so pretty early. It’s from then on a mix of input signal and squealing.

Voltages are as follows

Ic1
1-15.8
2-15.6
3-012
4-0
5-018
6-15.8
7.15.8
8-16

Ic2
1-8.56
2-8.56
3-2.66
4-0
5-2.67
6-8.56
7-0
8-1710

Tc1044
1-8.87
2-6.86
3-0
4-0
5-0.23
6-4.40
7-403
8-8.87

 

[ElReverendoRyan]

The board’s clean, just went over all of it, making sure there are no stray strands of wire etc. Reflowed most of the joints etc. I’ll get some pics up if nothing comes out of the voltages.

I get input fine until I hit ic1, so pretty early. It’s from then on a mix of input signal and squealing.

Voltages are as follows

Ic1
1-15.8
2-15.6
3-012
4-0
5-018
6-15.8
7.15.8
8-16

Ic2
1-8.56
2-8.56
3-2.66
4-0
5-2.67
6-8.56
7-0
8-1710

Tc1044
1-8.87
2-6.86
3-0
4-0
5-0.23
6-4.40
7-403
8-8.87

Hey guys, switched out the charge pump and no dice, still the same problem. I took a video of what’s happening, in case the symptom speaks to anyone