Debugging help for Madbean Dirtbag Deluxe needed!!!!!

[njkmonty]

this is the project

http://www.madbeanpedals.com/projects/Dirtbag/DirtBagDeluxe.pdf



Ive followed the Coolaudio V3205 Build

*  Overload led appears to be working correctly
*  Level Pot works
*  Blend Pot Works ( But no delay signal)
*  Feedback,Modulation,Delay,Chorus/vib  pots and switch are not responding.
* When using an audio trace lost guitar signal at 1st BBD (Ic4) Pin 7
*  The BBD Chips were working on a Breadboarded  Aquaboy Deluxe using 2 delay chips
My Voltages are as follows:

input voltage 8.94v

Ic 1 , Ic 3 & Ic 8 (All Tl072)
1  4.5v
2  4.5v
3  4.5v
4  ground
5  4.5v
6  4.5
7  4.5v
8  8.94v

Ic 2   V5710 Cool Audio

1  1.2v
2  1.87v
3  1.87v
4  1 milli volt
5  1.87v
6  1.87v
7  6.95v
8  1.87v
9  1.87v
10  7.4v
11  5.2v
12  1.87v
13  8.94v
14  1.87v
15  1.87v
16  60 milli volts

Ic 4  V3205D Cool Audio

1  ground
2  8.94v
3  3.76v
4  3.85v
5  8.1v
6  80 millivolts
7  4.31v
8  7.83v

Ic 5  V3205D Cool Audio

1  ground
2  8.94v
3  3.95v
4  4.05v
5  8.1v
6  80 millivolts
7  3.97v
8  7.83v

Ic 6      Tl072
1  3.97v
2  3.97v
3  3.97v
4  ground
5  4.72v
6  4.72v
7  4.72v
8  8.94v

Ic 7      Tl062
1  0.6v - 5.5v
2  4.6v - 4.7v
3  4.1v - 5.3v
4  ground
5  4.6v - 4.7v
6  4.6v - 4.7v
7  4.1v - 5.3v
8  8.94v

Ic 9   Cd4047
1  1 milli volt
2  8.94v
3  8.83v
4  8.94v
5  8.94v
6  8.94v
7  1.6 milli volt
8  ground
9  1.6 milli volt
10  85 milli volt
11  8.94v
12  1 milli volt
13  2 milli volt
14  8.94v

[Marcvv]

That is not an easy build 
First of all i would advice to post this at the Madbean forum as there are many that have build this.
The version with the V3205 is known to be problematic. There are quite some posts at Madbean's about that.

Second: did you read the section on biasing the delay and did you follow the directions? That is a very precise procedure and if not then it is totally possible tht you have no signal after the BBD.

The voltage on the output of the compander should be half the powersupply. So that is something that is not correct. But again if you did not bias then you mightnhave no signal at all.

Succes!

[Scruffie]

Your 4047 isn't working correctly (pins 10 & 11 should have near 1/2 supply) so check that area and remember CMOS are static sensitive.

Also yeah your compander outputs are high, what values did you use for R11 & 12.

[njkmonty]

Ive made the deluxe micro man before with no probs, so i feel this isnt out of my league.
http://youngpedals.com/Deluxe_Micro_Man_Rev_A.pdf

will check your suggestions

[njkmonty]

woohoo!  got it working!
replaced 4047  adjusted the trim pots using the audio probe , see below video
a little distortion and whine on the long delay settings, similar to my micro man,, is this the best to expect with this build?

 i used 2 x 47K  resistor for  R11 & 12

thanks for your help
dont go too far Ive got a half working string ringer for debugging!

http://youtu.be/pAR0KRODPcw

having trouble embedding youtube video?