YakSabbath
New member
Hello! I am currently working on an Informant Overdrive but ran into a snag – LED works but I have no signal through the pedal on buffered or effect mode.
Strangely I am getting 17V on the second opamp but not the first, I have switched the chips around with same results to it must be circuit related, see voltages below:
IC1
1 - .01V
2 - .01V
3 - 7.22V
4 - 0V
5 - 7.22V
6 - 0V
7 - 0V
8 - 0V
IC2
1 - 8.81V
2 – 8.8V
3 – 7.22V
4 – 0V
5 – 7.22V
6 – 8.8V
7 – 8.84V
8 – 17.52V
IC3
1 – 9.1V
2 – 4.56V
3 – 0V
4 - 0.17 V
5 - 0.38V
6 – 4.38V
7 – 6.81V
8 – 9.1V
I seem to be getting noise floor – the volume and drive controls give proportional noise when dialed up and down, cut control seems to filter the noise, seems like the latter section of the circuit is functioning but no signal getting through IC1
Using a MAX1044 for voltage charge pump with bead of solder across jumper pad as per instructions, I have tried two different chips with same results
Picture attached of back and front of board attached, i have reflowed twice already
Any help would be appreciated – thanks!
Strangely I am getting 17V on the second opamp but not the first, I have switched the chips around with same results to it must be circuit related, see voltages below:
IC1
1 - .01V
2 - .01V
3 - 7.22V
4 - 0V
5 - 7.22V
6 - 0V
7 - 0V
8 - 0V
IC2
1 - 8.81V
2 – 8.8V
3 – 7.22V
4 – 0V
5 – 7.22V
6 – 8.8V
7 – 8.84V
8 – 17.52V
IC3
1 – 9.1V
2 – 4.56V
3 – 0V
4 - 0.17 V
5 - 0.38V
6 – 4.38V
7 – 6.81V
8 – 9.1V
I seem to be getting noise floor – the volume and drive controls give proportional noise when dialed up and down, cut control seems to filter the noise, seems like the latter section of the circuit is functioning but no signal getting through IC1
Using a MAX1044 for voltage charge pump with bead of solder across jumper pad as per instructions, I have tried two different chips with same results
Picture attached of back and front of board attached, i have reflowed twice already
Any help would be appreciated – thanks!