I’m trying to consolidate information from past threads regarding the topic of that annoying popping noise you sometimes get when engaging a pedal. Here are the main possible causes and fixes that I gathered so far:
-Faulty/dry solder joints at 3PDT
Fix: Reflow solder joints on 3PDT
-Lack of input and output caps & pulldown resistors
Fix: PEDAL PCB includes them on the majority of their PCB’s. Test these component values and capacitor leakages before installing them. Use high quality capacitors.
-Faulty input and output caps or pulldown resistors
Fix: Test these component values and capacitor leakages before installing them. Use high quality capacitors.
If you didn’t to test beforehand, check for DC voltage to ground at input and output wires. High DC readings indicate that there is an issue with either the caps, resistors, or faulty solder joints at these components. (My question: What are acceptable DC readings, if any?)
-LED causing the issue
Fix: Jumper LED switch at 3PDT to keep it on, engage the 3PDT, if noise is gone then it’s the LED. Proceed with one of the recommended repairs on the AMZFX page.
(My question: Would installing another or a smaller LED fix it?)
-Cheapie 3PDT switch
Fix: Replace it with a higher quality switch after you’ve tried everything above.
Please correct any mistakes/misinformation and add what you feel is pertinent. Thanks in advance!
-Faulty/dry solder joints at 3PDT
Fix: Reflow solder joints on 3PDT
-Lack of input and output caps & pulldown resistors
Fix: PEDAL PCB includes them on the majority of their PCB’s. Test these component values and capacitor leakages before installing them. Use high quality capacitors.
-Faulty input and output caps or pulldown resistors
Fix: Test these component values and capacitor leakages before installing them. Use high quality capacitors.
If you didn’t to test beforehand, check for DC voltage to ground at input and output wires. High DC readings indicate that there is an issue with either the caps, resistors, or faulty solder joints at these components. (My question: What are acceptable DC readings, if any?)
-LED causing the issue
Fix: Jumper LED switch at 3PDT to keep it on, engage the 3PDT, if noise is gone then it’s the LED. Proceed with one of the recommended repairs on the AMZFX page.
(My question: Would installing another or a smaller LED fix it?)
-Cheapie 3PDT switch
Fix: Replace it with a higher quality switch after you’ve tried everything above.
Please correct any mistakes/misinformation and add what you feel is pertinent. Thanks in advance!