Acrobat won't pass sound

[Mr. Strypes]

Just finished putting the Acrobat together. It lights up just fine. Testing with a multimeter, I'm getting voltage to all of the ICs. I assumed (and partially still think) there's a grounding issue, but I'm not sure. Of course, it gets power, so maybe not.
I've tried:
- Scraping all the paint away from the enclosure's 1/4" holes so there's bare aluminum touching the CLIFF washers.
- Attaching a ground wire between the CLIFF washers and then attaching that to an external ground.

Any ideas? Thanks in advance! (Love this community!)

 

[Brett]

Can you pull the assembly out of the enclosure and take some clear pictures of the back of the board?

 

[Mr. Strypes]

Can you pull the assembly out of the enclosure and take some clear pictures of the back of the board?

Sure!

 

[Brett]

So, to be clear, you do not have continuity between the two points circled in red?

 

[Mr. Strypes]

So, to be clear, you do not have continuity between the two points circled in red?
View attachment 83446

That's correct. I don't have continuity between those two points. (Same on the output side.)

 

[Brett]

You do not have continuity, even without the plugs inserted?

 

[Mr. Strypes]

You do not have continuity, even without the plugs inserted?

No, there is no continuity, whether cables are inserted or not, whether in bypass or not.

 

[jwin615]

@Robert do you recall if both tip pads are routed?
I'm still stuck on a switching jacks, but that only even partially makes sense if both pads aren't routed.
@Mr. Strypes, can you check continuity on the other tip jack pad? The one directly to the left of the red circled one Brett posted.
Also, check both each tip pad vs the cable tip.
And against each, all with cable inserted.
So cable in,
Left tip pad vs each red circle
Left tip vs other cable end tip
Right tip vs other cable end tip
And, for S&G cable end tip and sleeve.


Sidenote. is this an Easter egg?

I swear those are letters but I can't make it out.
____ on?

 

[Brett]

I'm still stuck on a switching jacks

You can see in the first image that the trace is routed to the pad that I marked/circled red in the bottom of the board image that was posted. That should be the always connected tip for the jack if we're talking about standard Neutrik NMJ6HCD2 jacks (which is what this board appears to be designed to use).

If red does not have continuity with red, and green does not have continuity with green, one can only assume that the traces were separated somewhere along the way.



I promise that I'm not challenging your abilities here @Mr. Strypes, but are you sure you are using your DMM in the correct mode? I only ask because it seems unlikely that both of these traces are damaged unless you've had to do some major surgery and removed the switch or jacks or something at some point.