WSG completed but with sound problems

[Monstruarte]

hello friends. I just finished building a WSG. but I found many problems when testing their sound.
There are several knobs that do not work. but mostly all of the filters are what caused me more problems. When I touch the knobs (coarse, fine and resonance), it sounds an awful noise that overshadows everything else. this occurs at the touch of my fingers with these knobs.
I check the pcb and solder a thousand times. as well as the connections between the cables and pcb. and not know where to go.
I also want to clarify that already tried to change the integrated U1 and U2. so this is not the problem.
Any help?
(And sorry for my English, I'm from Argentina and I'm using a translator;)

[Monstruarte]

ok. I think I have more problems than I thought.
In the picture you can see red dots. These red dots are those that run well. everything that is not marked in red, does not work.

This would be the list of things that work well:

R29 B zaniness: Modifies the pitch of a single point of lfo
R26 B Zany Modifies the lfo rate
R25 B weird Modifies general pitch
S7 B unusual Modifies lfo waveform

R1 A wacky Modifies general pitch
S1 A Wackytoo off the wacky knob

As for filters, none work, although there is something that strikes me when I play with my fingers is heard: Huuuuuuummmm ... sounds like a problem with the ground. do not know.
I must remark that my box is wooden. and review and the connections between the knobs and pcb, also change the two IC with new ones. the problem is not in the IC.
The output and the switch on/off, work nice.

Please I am very frustrated with the WSG.

any clues?

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[adambee7]

Check all ground connections. This could well be causing the hum. what are the pots mounted to? If you have a metal panel run a ground wire from it to ground on pcb. If your using wood or plastic, ground all pot bodies together with wire and connect to ground on pcb. Its basically check all wiring to pots, switches and anything going to ground.

[Monstruarte]

thanks for replying adam.
The WSG will be built in a wooden box.
At this time the circuit is completely assembled on my desk. I am testing the circuit before putting it in the box. always taking precautions not to touch the knobs and wires between them.
I will check especially the ground wires. then I'll tell you.

I will cross my fingers, that would be a simple solution.

[Monstruarte]

I just checked all ground connections. in the circuit (following the path of the image stopping at every weld and component)

No problems with the welds. also check all connections between the cables, knobs and circuit. there is nothing wrong with it and are connected in a perfect and orderly way.

Something about the components?

[inlifeindeath]

the wsg board is a double sided board. is it possible you haven't made the top side connections?
when i made mine, i managed to find a layout that someone had edited to be one sided.

[Monstruarte]

Hello, and thank you for responding.
I understand that the board is a double side board. I did the other side of the board with cables. and are connected in a clean and correct mode (and check many times). I do not think this is the problem. However I am interested in the board you are talking about. You've got the picture?

I'm thinking it must be some component, resistors, capacitors, or something like that. But I have no idea how to find the problem.

[inlifeindeath]

i found the link! it is here good sir:
http://electro-music.com/forum/topic-34165.html&highlight=

As for your WSG issues, only thing i can suggest is to print out a copy of the schematic and trace the filter and each osc. voice against the schem. verifying component values and highlighting as you go along.
hope it works out for you!

[Monstruarte]

first, thanks for image inlifeindeath (I will use in the future). For now I need to resolve this that I am building.
ok. let's review.
I was doing a cable bridges between some resistors and note that the sound varied. So replace the resistors with new ones and started to run things before they did not.
I changed these components:
R7, R15 (Voice A)
R23 (Voice B)

When I changed R23 new one. Wacky (B) brought to life as the switches "wackiness" and "wackytoo."
The voice B is fully functional.

When I switched R7 and R15, "weird freq" and switch "wackiness" began to make his own. A big smile on my face.
But (it seems there is always a but), I found no way to fix "zaniness" and "Zani freq (A), like the switch" Unusual. " I have no clue.

I could solve the problem of "Huuuuummmm" by touching the metal of the knobs (in filters) with my hands. Only grounding them
However, the filters still not working.

The green dots are the new arrangements, and red are the ones who always worked. Those who are without color are the ones I have still problems.

I think the problem of voice A is found here (see picture).

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