GssL 20th Anniversary edition

[Andado]

All that doesnt matter - you have a lot of problems, well cover the basic trouble shooting first - posting stacked "Now I found this, now this", is also generally confusing when we try to trouble shoot, but dont worry, well get there.

I marked the voltage points we need to measure, as well as the refernece to measure them to.

Start by verifying those.

Gustav

Here is the measurement

 

[Andado]

@Andado It's gonna be way easier for Gustav to troubleshoot when he has a list of all the voltages written down instead of video!

Sick idea with the 3d panel btw ! Good job

Thanks man. Yes 3d printers is a must have

 

[Gustav]

The neg 12 part I guess I’m wrong can’t measure from ground to that right?

You can measure all the points to the reference point I marked.

Here is the measurement

And you posted it here, unless you measured it some other way?

If you did get -12V relative to ref, its all fine.

Post a picture of the whole board, pls.

Gustav

 

[Andado]

You can measure all the points to the reference point I marked.



And you posted it here, unless you measured it some other way?

If you did get -12V relative to ref, its all fine.

Post a picture of the whole board, pls.

Gustav

Yes I did get -12 and yes from the reff point.
Here’s the board.
Really appreciate all the help Gustav

 

[Andado]

@Gustav when I probe the 0Ohm resistor we was supposed to change from 10k to 0 80% of the noise goes down. If that can maybe help you to track some the problem. Added a video of it.

 

[Gustav]

Yes I did get -12 and yes from the reff point.
Here’s the board.
Really appreciate all the help Gustav

Alright, good to hear the voltages are there.

I took a look at the picture. Of course, trouble shooting this is new to me as well, and with time, we gain some experience and have a faster eye. Most important thing is just to be patient and methodical, and any poking around you do while we follow basic trouble shooting steps, youll probably learn something from it as well.

1. The AGND.

It runs to the node through a jumper, and also to a pad, in case you want to isolate it. You ran it to both, and they meet on the case.

I would cut he jumper on AGND, so you dont loop it, but...

That is not the cause of the greater problem here.

2. Release ribbon cable

Looking further, please recheck orientation of the ribbon cable set-up for release. You can try just unplugging it and see what happens, since its not crucial to make the rest work, and may clear up your problem.

It sort of looks to me like you may have reversed one end of the connector when making the cable.

Gustav