Tyrian distortion, no output

[Markk]

I cannot figure out why the effect doesn't work. In bypass I have signal, the LED works, when I engage the effect, it kills the signal. I have reflown everything, I've tested my resistors, can't figure it out it's driving me mad, please please help!!

 

[BuddytheReow]

Check power on you IC pins

TUTORIAL - Troubleshooting 101

There comes a time for every builder to spend multiple hours soldering, wiring, and breadboarding a certain circuit just to have it work incorrectly, if at all. This could happen on your first build or any build after that. This write up is to help you in your quest to figure out why it isn't...

forum.pedalpcb.com

 

[Markk]

Check power on you IC pins

TUTORIAL - Troubleshooting 101

There comes a time for every builder to spend multiple hours soldering, wiring, and breadboarding a certain circuit just to have it work incorrectly, if at all. This could happen on your first build or any build after that. This write up is to help you in your quest to figure out why it isn't...

forum.pedalpcb.com

All four ic's read this.

1. 4.5
2. 4.5
3. 4.3
4. 0
5. 4.5
6. 4.5
7. 4.5
8. 9.1

 

[BuddytheReow]

ICs look good. Your next step would be to use an audio probe to find out where the signal dies. Do you have one?

 

[Markk]

ICs look good. Your next step would be to use an audio probe to find out where the signal dies. Do you have one?

Yes it dies at r22,

 

[BuddytheReow]

Ok, so the gain stages are good. Triple check the values of r22, c15, and c16 with you DMM. Also check your soldering there

 

[Markk]

Ok, so the gain stages are good. Triple check the values of r22, c15, and c16 with you DMM. Also check your soldering there

Will do, I'll report back when I do.

 

[Markk]

Will do, I'll report back when I do.

So I had the wrong cap in c16. Replaced it, getting output but no distortion

 

[BuddytheReow]

Do the eq controls work? If so then check the diodes right after r22

 

[Markk]

Do the eq controls work? If so then check the diodes right after r22

The eq works, the diodes after r22 are LED, they appear to be in the right position.

 

[BuddytheReow]

Does your gain stage work? Might be the other culprit

 

[Markk]

Does your gain stage work? Might be the other culprit

I'm not sure what do you mean

 

[ADAOCE]

Just a general suggestion but try increasing your iron temp for whatever solder you are using and try to use a little less solder. Not sure what tip you like to use for these but I tend to use a chisel tip or angled round tip. If you’re using a really small thin tip because the pads are small sometimes you end up putting more heat on the pad or component than you should. Once I went to bigger tip with higher temp (350 to 375 C) my solder joints have been so much better

 

[BuddytheReow]

I'm not sure what do you mean

Sorry, the gain pot. Is there a difference in sound when you turn it?

 

[Paradox916]

@BuddytheReow I was just about to say that..I knew what you meant.

 

[Markk]

Sorry, the gain pot. Is there a difference in sound when you turn it?

A little bit but not really.

 

[BuddytheReow]

I would check your IC voltages again. Specifically IC1, but check IC2. If the gain control isn't working it will be around there. Also triple check your component values and solder joints. Just be patient.

 

[Paradox916]

I believe the clipping LEDs (D6 andD7) should light up when clipping. Not trying to derail the process here just curious if that is operating normally.

 

[Markk]

I believe the clipping LEDs (D6 andD7) should light up when clipping. Not trying to derail the process here just curious if that is operating normally.

No it doesn't work

 

[jimilee]

Have you checked all of your resistor values?