Aion Azimuth - pass thru and LED. nothing when engaged.

[Marcos - Munky]

Volume pot.

[broomhandle]

Ok.... awesome!!! I have sound, and I have finally heard the effect.

when it "works", I have volume and gain etc...

so...

-volume pot lug 2 and main board output--------->no sound
-volume pot lug 2 and switch board effect out------------>WORKS!
-volume pot lug 2 and output jack----->WORKS!
-main board out and switch board effect out------->WORKS!
-main board out and output jack---->WORKS!
-switch board effect out and output jack-------->no sound.

[Marcos - Munky]

But that wasn't the test I asked you to do! We already knows there's output at the end of the volume pot. We need to know the exact point between the volume pot and output jack the signal is being cut.

2) with your multitester on continuity mode, press the switch so the effect is engaged. You don't need to connect any cables or even keep the power supply, as long as the effect is on. Check the continuity between those points:
-volume pot lug 2 and main board output;
-volume pot lug 2 and switch board effect out;
-volume pot lug 2 and output jack;
-main board out and switch board effect out;
-main board out and output jack;
-switch board effect out and output jack.

Those readings should tell us a lot of what's happening here.

[broomhandle]

Then I am not understanding you. I did exactly what you asked here:

"So here what should you do now:
1) repeat the test 1 again. One alligator clip directly to the output jack, the other one to lug 2 of the volume pot. Check if the pot changes the volume. If it doesn't, move the alligator clip from lug 2 to lug 3 and check if the pot changes the volume.
2) with your multitester on continuity mode, press the switch so the effect is engaged. You don't need to connect any cables or even keep the power supply, as long as the effect is on. Check the continuity between those points:
-volume pot lug 2 and main board output;
-volume pot lug 2 and switch board effect out;
-volume pot lug 2 and output jack;
-main board out and switch board effect out;
-main board out and output jack;
-switch board effect out and output jack.

Those readings should tell us a lot of what's happening here."


by doing this, I was able to get the board to engage. I was able to use the volume knob, and the gain knob. Before I was not able to do this.

If you can explain what I did incorrect. I feel I have done the test you asked. and gave results.

[broomhandle]

oh... multimeter....

duh....

I'm sorry...  ( I am working at the same time as guitar pedals.. and I work for the health department, so it is a little crazy right now.) I work on this to take a break.... so.. thank you for helping....

[broomhandle]

with multimeter...

-volume pot lug 2 and main board output--------->002
-volume pot lug 2 and switch board effect out---->002
-volume pot lug 2 and output jack----------------->1 (Nothing)
-main board out and switch board effect out------>002
-main board out and output jack------------------->1 (Nothing)
-switch board effect out and output jack----------->002

[Marcos - Munky]

So we have:
(1)volume pot lug 2 and main board output--------->002 > continuity between those points. Nice!
(2)volume pot lug 2 and switch board effect out---->002 > continuity between those points. Nice!
(3)volume pot lug 2 and output jack----------------->1 (Nothing) > no continuity
(4)main board out and switch board effect out------>002 > continuity between those points. Nice!
(5)main board out and output jack------------------->1 (Nothing) > no continuity
(6)switch board effect out and output jack----------->002 > continuity between those points. Nice!

We identified where the signal is interrupted... but there's something wrong with those results. Let's see things this way:

The output of the circuit is on volume pot lug 2. From lug 2, it's connected to the board and goes to main board out (1). From main board out, it goes to switch board effect out via a wire (4). Then, the switch sends the signal to the output jack (6). Everything is fine so far.

From (3), we know the signal isn't reaching the output jack, so we have to track where it is being stopping.

So, keeping the start point to track the signal on volume pot lug 2 and following the signal path, the next point to check is if the signal is reaching the switch board (2), and it is indeed.

What is between the switch board and the output jack? The switch. So we can conclude the problem is here, right?

Nope. On (6) you said the signal is going from the switch board effect out pad to the output jack. And by analyzing (1), (2), (3) and (4), (6) shoudn't have no continuity between those two points.

Now let's analyze your previous test:
-volume pot lug 2 and main board output--------->no sound
-volume pot lug 2 and switch board effect out------------>WORKS!
Here you didn't had sound on test 1 but had on test 2. That means you've jumped the wire that connects the main board output and the switch board and it worked, so the wire should be faulty. But test (4) for continuity said the wire is working.

-volume pot lug 2 and output jack----->WORKS!
Nothing to add here.

-main board out and switch board effect out------->WORKS!
Here, you're jumping the same wire as before, so the results doesn't match with test (4) for continuity.

-main board out and output jack---->WORKS!
Nothing to add here.

-switch board effect out and output jack-------->no sound.
Here, we can conclude the signal isn't reaching the switch board, because you connected the circuit board directly to the output jack. That indeed agree with test (6) and (3). So the signal from the volume pot is getting interrupted either before reaching the main board output (and test (1) says it is reaching this point) or on the wire that connects both boards (and again test (4) says this wire is fine).

My best guess, based on all of those tests? The wire that connect both boards is faulty and sometimes works, sometimes don't. It may be a bad solder joint, or you may moved it a little and it conducted or not based on how you moved it.

It's a hard wire to replace, as you said. Then just cut it, and add a wire with one end soldered to that big solder blob on the main board for the lug 2 of the volume pot (the one in the middle, right above the word volume) and lug 3 of the switch (the one on top right corner). By doing this, you're jumping everything between the volume pot lug 2 (which we know there's signal reaching this point) and the switch (which your continuity tests says it's working). The only thing that will be in the way between the switch and the output jack is that wire that connects the switch board to the output jack, and we know this wire is working or else you woudn't get the bypassed sound out of the stompbox.

[Slowpoke101]

I really do suspect (based on your test results ) that you have a broken track on the little PCB that is soldered to the foot-switch. Have a look at the image below;



If you de-solder the PCB OUT wire on the small PCB and resolder it directly to the foot-switch terminal as shown in the image below, you may have a fully working effects pedal.



If this does not work then your foot-switch may be faulty (damaged contact assembly ) and a replacement switch would be required.

[broomhandle]

If you de-solder the PCB OUT wire on the small PCB and resolder it directly to the foot-switch terminal as shown in the image below, you may have a fully working effects pedal.

I ran a jumper from those points, and "nothing" Would I need to remove the solider from that point?

and it looks like you guys are saying 2 different things.

"Then just cut it, and add a wire with one end soldered to that big solder blob on the main board for the lug 2 of the volume pot (the one in the middle, right above the word volume) and lug 3 of the switch (the one on top right corner)"

I am not sure what you mean by this...

Also, I get sound and the switch works with a jumper from main board "out" to the out jack.

so why not just make a jumper wire for that?

Im a little confused...

[Slowpoke101]

"Then just cut it, and add a wire with one end soldered to that big solder blob on the main board for the lug 2 of the volume pot (the one in the middle, right above the word volume) and lug 3 of the switch (the one on top right corner)"

I am not sure what you mean by this...

Also, I get sound and the switch works with a jumper from main board "out" to the out jack.

so why not just make a jumper wire for that?

Im a little confused...

I'm getting somewhat confused too.....
Follow Marcos' suggestions and ignore mine for the moment. The following image is a visual representation of what Marcos would like you to try next;



Now, the reason for not directly connecting to the output jack is that when the pedal is in bypass, the circuit's output (noise and setting of the volume control ) will still be connected which can affect the guitar's signal.

[broomhandle]

IT WORKS!!!

I just wanted to say thank you. I have the vol 2 jump wire to the switch lug. All knobs work. thank you thank you!! on to the DS-1!!!

[Marcos - Munky]

Glad to know it works!

Now, almost everything you did on this one should help you to find the exact point where the signal is being cut on your ds-1. Start by looking at the schematic, trying to identify the signal path, then do an audio probe...

[broomhandle]

The DS-1 is something else.

Slowpoke figured out I built a 1/2 vintage/modern.

https://www.diystompboxes.com/smfforum/index.php?topic=124235.0

it has a low fizzle sound, possible fake IC chip. I don't know.