Ok, so I did something bad to my CL somehow when I boxed it up.
I am not getting any sweep and the rate knob does nothing. As a result the effect
is something like a cocked wah, and I can manually move the range knob to artificially create a sweep.
Am I right in assuming that the sweep comes from the LM324n and that pin 14 should be oscillating?
It is not and is a constant 4.2 volts. Pin 8 is giving a constant 0.56v.
pin 9 is 4.2V
I have replaced the chip with no change.
Ben
Quote from: trickpony on March 07, 2013, 11:29:31 PM
Ok, so I did something bad to my CL somehow when I boxed it up.
I am not getting any sweep and the rate knob does nothing. As a result the effect
is something like a cocked wah, and I can manually move the range knob to artificially create a sweep.
Am I right in assuming that the sweep comes from the LM324n and that pin 14 should be oscillating?
It is not and is a constant 4.2 volts. Pin 8 is giving a constant 0.56v.
pin 9 is 4.2V
I have replaced the chip with no change.
Ben
Out of the box it sounds fine?
maybe stating the obvious, its not the filter switch is it?
Sent from my SC-02B using Tapatalk 2
Fixed. Ok well I replaced c16, but the one I pulled measured fine out of circuit, and I also reflowed either r21 or r23 I forget which...and now I have it working.
Thanks for everyone who tried to help.
PS
Just in case anyone would like to explain which one would be the most likely culprit in causing a constant 4.2v on pin 14 (+) of lm324 please tell me. I am thinking that if r23 wasnt making contact then IC5D would be on its own getting powered from VC->r19->pin12 which I believe I measured at 4.2. Pin 13(-) would only be getting input from the series-opposed capicitor feedback loop that would saturate and become an open circuit. So no feedback and Vout would be 4.2v as I saw...is that correct?