Queen of bone rullywow 1st chanel not working.(solved).

[baloubass]

Hello, i just end the build of a QofB from rullywow.
The second chanel work good.
The first chanel just not work anything no led, and mute the sound.
I check all my solder and re-hot all.
Change the 3pdt.
I swap the ic.
Voltage on ic:
IC 1:
1-8,70v
2-8,10v
3-7,35v
4-0v
5-16,64v
6-8,36v
7-8,33v
8-8,30v

IC2:
1-8,12v
2-8,10v
3-7,35v
4-0v
5-16,64v
6-8,36v
7-8,49v
8-8,30v

IC3:
1-9,28v
2-5,69v
3-0v
4-2,937v
5-9,28v
6-5,77v
7-4,80v
8-2,968v
Some pics:





Does anyone can help to find a new way to solve this problem please? I'm really don't know where i can search.

My new diy pedalboard  familly waiting for the big boy.
Here is some build i make, with any issue, all working first time. Laser engraving and ferric etching. I build 3 u87 mic, 1 1176, 1 ssl comp to.

[duck_arse]

if you renumber your voltages to follow this diagram:



I think your voltages on IC1 & 2 are ok. and the 16V would suggest IC 3 is ok. I would pull IC1 out and check that all its legs are straight, and then re-insert it if it's okey dokey looking.

something puzzles me about some of your resistors - those white bodied ones - what value are they, what value do they measure? and - there is a couple of 6 band resistors fitted, what value are they/measure?

just curious, doesn't hurt to check.

[Govmnt_Lacky]

Its odd that you are getting 16VDC at IC1 and IC2 but no sign of 16VDC from the charge pump chip 

Recommend re-checking your IC numbering (IC1, IC2, and IC3) and reposting voltages according to duck's diagram above.

[baloubass]

 Hello thank for the reply.
IC 1:
1: 8.09      8: 16,44
2: 8,12      7: 8,36
3: 7,36      6: 8,56
4 : 0          5: 8,30

IC 2:
1: 8.12    8: 16,65
2: 8,18    7: 8,36
3: 7,33      6: 8,50
4 : 0          5: 8,31

IC 3:
1: 9,30      8: 9,29
2: 5,71      7: 5,61
3: 0           6: 4,45
4 : -2,92   5: -3,69
The white resistor are 1M resistor tested just before soldering as usual when i populating pcb to avoid mistakes.
It's not 6 resistor but the diode MA856 for the 4 smaller and 1S1588 for the 2 other.

I

Its odd that you are getting 16VDC at IC1 and IC2 but no sign of 16VDC from the charge pump chip 

Recommend re-checking your IC numbering (IC1, IC2, and IC3) and reposting voltages according to duck's diagram above.

What they mean?

I'm working on the audio probe test.
Sorry about my broken english, i'm french.

[baloubass]

Hey, audio probe kill the game.
I was have a cutting trace on the output effect section on the first chanel. This was very fine and the varnish was just a very thin  line cutting.
And for the led, begginer mistake but just reverse mounted.
Thank you guys and hope this thread help someone else. Work with audio probe are really helpfull.
Thank
Marc

[duck_arse]

The white resistor are 1M resistor tested just before soldering as usual when i populating pcb to avoid mistakes.
It's not 6 resistor but the diode MA856 for the 4 smaller and 1S1588 for the 2 other.

the resistor above C3 and 2 places below C12 [and there might be others the same hidden] in your photo have 6 bands of colour denoting the resistance value. I was interested in what their resistance was, as we rarely see the six band type, usually only the 5 band or the 4 band.

and well done on the fixing.

[baloubass]

The white resistor are 1M resistor tested just before soldering as usual when i populating pcb to avoid mistakes.
It's not 6 resistor but the diode MA856 for the 4 smaller and 1S1588 for the 2 other.

the resistor above C3 and 2 places below C12 [and there might be others the same hidden] in your photo have 6 bands of colour denoting the resistance value. I was interested in what their resistance was, as we rarely see the six band type, usually only the 5 band or the 4 band.

and well done on the fixing.

oh ok sorry, it's a 10k resistor the last are temp coef. 50ppm for the red


Now the big boy  going to the pedalboard.