SOLVED Kentauride No Sound

joelorigo

joelorigo

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jhaneyzz said:
Any chance the PCB on the footswitch is upside down? I soldered one onto the wrong side of a board once and that didn't work.
Click to expand...
Interesting that you ask that. I don't think it's upside down. The numbers on it are matched up with the numbers on the main PCB. And the way I have it matches this photo from this previous successful build:

EffectsLayouts Kentauride

Another 2-in-1 from EffectsLayouts. This one is a TS10/Klon. For the Klon side I used old 1N34a diodes from stompboxparts.com. They measured a bit all over the place, but I did find two relatively close to the target Vf of .350V on my DCA55. Sounds great! The combination was obviously inspired...
forum.pedalpcb.com forum.pedalpcb.com

However, I did have it upside down first. So I solder sucked all the solder off, removed it and re-soldered it in the correct orientation. Is it possible one of the pads got messed up? The continuity for on and off are correct though. Also, these footswitch PCBs are a tight fit compared to the PedalPCB ones.
 
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jhaneyzz said:
Two things

We have a ground bridge somewhere
  1. solder connections on the jack
  2. Input pad
  3. solder bridge between input positive and input ground
  4. Solder bridge between output positive and output ground
Click to expand...
I don't see any solder bridges on either side of the PCB for the input "S" & "T" pads or output "S" & "T" pads. The connections on the jacks seem ok. I think. I am getting continuity between the "T" pads and the jack tips and the "S" pads and the jack sleeves on both input and output..
 
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joelorigo said:
Interesting that you ask that. I don't think it's upside down. The numbers on it are matched up with the numbers on the main PCB. And the way I have it matches this photo from this previous successful build:

EffectsLayouts Kentauride

Another 2-in-1 from EffectsLayouts. This one is a TS10/Klon. For the Klon side I used old 1N34a diodes from stompboxparts.com. They measured a bit all over the place, but I did find two relatively close to the target Vf of .350V on my DCA55. Sounds great! The combination was obviously inspired...
forum.pedalpcb.com forum.pedalpcb.com

However, I did have it upside down first. So I solder sucked all the solder off, removed it and re-soldered it in the correct orientation. Is it possible one of the pads got messed up? The continuity for on and off are correct though. Also, these footswitch PCBs are a tight fit compared to the PedalPCB ones.
Click to expand...
You may have o er heated the switch causing an internal short. In one position pins 1-4-7 should have continuity with the row below it, and the bottom row should have continuity with the middle row.
 
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Looks like we're on to something. In the on position (LED is lit), there is continuity with the top row (1-4-7) and the row below (2-5-8). In bypass, there is continuity with the bottom row (3-6-9) and the row above (2-5-8), which I believe is normal.

BUT ALSO in bypass pins 7 & 8 have continuity. That's not normal, right?

And I don't know if this means anything but in bypass touching 4 & 5 makes the LED light up.
 
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joelorigo said:
Looks like we're on to something. In the on position (LED is lit), there is continuity with the top row (1-4-7) and the row below (2-5-8). In bypass, there is continuity with the bottom row (3-6-9) and the row above (2-5-8), which I believe is normal.

BUT ALSO in bypass pins 7 & 8 have continuity. That's not normal, right?

And I don't know if this means anything but in bypass touching 4 & 5 makes the LED light up.
Click to expand...
You’re right. 7,8,9 should not hav continuity all at the same time, here is a pic of stomp board wiring and what each lug is doing.
 

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joelorigo said:
Ah ha! So the idea is you can test the soldering right away, knowing if you have a problem before wiring/assembly in the enclosure?
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Yep, makes trouble shooting easier and removes extra variables. Every builder should have one. Mine came from jmkpcbs before I found this place. I had one for 10 years before that, but I needed something with an audio probe.
 
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I replaced the footswitch in question and I get signal in bypass! Thanks guys!

However, the TS side doesn't have any signal when activated. The Klon side works.

Since I have visually inspected this thing quite bit already and verified the component values, should I go to audio probing?
 
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joelorigo said:
I replaced the footswitch in question and I get signal in bypass! Thanks guys!

However, the TS side doesn't have any signal when activated. The Klon side works.

Since I have visually inspected this thing quite bit already and verified the component values, should I go to audio probing?
Click to expand...
Yessir
 
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Anything in these numbers look wonky?

Here's what I'm getting:

IC1 JRC4558
1 4.33
2 4.46
3 4.25
4 0
5 4.33
6 4.33
7 4.33
8 8.71

IC2 TL072
1 4.16
2 4.16
3 1.27
4 0
5 4.06
6 4.17
7 4.16
8 8.38

IC3 TL072
1 4.15
2 4.16
3 4.11
4 0
5 4.11
6 4.16
7 4.17
8 16.07

IC3 7660SCPAZ
1 8.37
2 4.32
3 0
4 -3.93
5 -3.77
6 3.75
7 3.8
8 8.37

Q1 2SC1815
E 2.82
C 8.7
B 2.48

Q2 2SC1815
E 4.21
C 8.7
B 3.48
 
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Also, I got the audio probe out and I am still not getting anything at R1. Getting signal at the IN pad. Since that is the first component in the schematic, there should be signal at R1, correct?
 

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