Angry charles not working
- Thread starter eeejar
- Start date
BuddytheReow
Moderator
Do you have a multimeter? That will help check voltages on the chips.
BuddytheReow
Moderator
Report back on the readouts for all 8 legs of the chips starting with the upper left corner and working CCW.
falco_femoralis
Well-known member
Use continuity mode and see if ground is shorted to the audio signal (the two lugs of one of the audio jacks is an easy way to check this). Also does the LED turn on when the pedal is on?
z2amiller
Member
Doublecheck the 2.2uF electrolytic capacitors in the middle of the board. The graphic on the landing
page shows the silkscreen with the + facing south, but your caps are all installed with the - facing south.
But -- the build doc says that all of the capacitors face the same direction with - facing south, and I
don't have one of these particular boards to check the silkscreen. I'd probably trust the silkscreen on the
board the most. Checking other random build pictures online, these probably are installed correctly.
Check R5 and R18. Orange and red can be hard to tell apart in these photos but those look like they could be 100K (brown/black/black/orange) and not 10K (brown/black/black/red).
Check R8/R9. Those are supposed to be 22k (red/red/black/red). Again maybe the lighting but those don't look like 22K.
Check R13 and R16. Supposed to be 2.2k (red/red/black/brown). It's possible that the red looks brown on those lighter colored resistors.
If you don't have an audio probe it's a great idea to build one. It's probably even more useful than a multimeter in finding out where something broke. (Look at the schematic and follow the audio thru the circuit until you find the place where the audio cuts out and it really helps narrow down the problem)
Good luck!
page shows the silkscreen with the + facing south, but your caps are all installed with the - facing south.
But -- the build doc says that all of the capacitors face the same direction with - facing south, and I
don't have one of these particular boards to check the silkscreen. I'd probably trust the silkscreen on the
board the most. Checking other random build pictures online, these probably are installed correctly.
Check R5 and R18. Orange and red can be hard to tell apart in these photos but those look like they could be 100K (brown/black/black/orange) and not 10K (brown/black/black/red).
Check R8/R9. Those are supposed to be 22k (red/red/black/red). Again maybe the lighting but those don't look like 22K.
Check R13 and R16. Supposed to be 2.2k (red/red/black/brown). It's possible that the red looks brown on those lighter colored resistors.
If you don't have an audio probe it's a great idea to build one. It's probably even more useful than a multimeter in finding out where something broke. (Look at the schematic and follow the audio thru the circuit until you find the place where the audio cuts out and it really helps narrow down the problem)
Good luck!
