Das Face 69er + Charge pump PEDALPCB problem !

AlanH

New member
Hello guys !

I need some help here since I'm not a pro. I have a musikding Ge face kit wich was working fine but I wanted to add this inverter so I could plug it on my board without using an other power supply. Basicly I just needed -9V.

I have bypass. The switch is working fine, LED is turning on and off but when effect is "on" I have no sound. I don't know what I'm missing here. Here is the original schematics, how it was wired and what I have done so far.

The IC was getting quite hot so I troubleshooted and resoldered Diode, Socket and capacitor around it. It's not very pretty anymore and a bit ghetto tbh but I think joints are good and nothing is shorted. (I swapped my wires on the DC jack like a dumbass but I wired it accordingly on the daughterboard. So Black on positive is "normal").

I can read +9V from the DC, on the LED but on the fixed -9V pad, I have no reading it seems... But again, the IC is socketed and everything is biping (IC lug to pad) so there is contact where it should. I'm missing something but I don't understand why !

Thank you for your help 🙏

(EDIT: wiring updated on what I did)
 

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Last edited:
Shouldnt your -9V supply be connected to pad #7, instead of whatever that unmarked pad is on the side?

The pads on the side look like they might be ground, that would explain why things are getting hot.
 
I tried to connect the -9V to pad#7 because, yeah, looks like it's where the negative voltage is coming in but nothing happened when I did. I'm going to wire it again on this !

Thanks for this confirmation ! (I'm not used to read schematics and I'm not very knowledgeable at all on this matter haha)
 
I wired -9V to pad#7 and gutted the pots out of the enclosure to be sure nothing is shorted by these. Still nothing when effect is engaged.

I'll join pictures of the fuzz PCB so you can see the traces if needed.
 

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It's measuring -0,45V on pad#7 when probed with black tip. Is the problem coming beforehand on the daughterboard ? Still read 0V on the -9V pad (maybe I'm doing something wrong when probing but the trace has continuity from -9V pad to the IC )

IC might not be working ? I can test with the one in my Argentum.
 
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