3
I. Are the lugs on the taps foot switch shorted (use your continuity tester to see if they are
connected when the switch is NOT being pressed)?
•
If they are shorted, (neatly) re-solder the tap foot switch wires to the board.
•
If they are not shorted, this probably means you need a new microcontroller. It was
probably damaged by static electricity during assembly. The pin connected to the
tap foot switch on the microcontroller seems to be the pin most susceptible to getting
damaged by static electricity. This has something to do with the internal architecture
of the IC. Contact info “at” zeppelindesignlabs.com to inquire about getting a new
microcontroller. If you have the means to flash your own chips (via a USBTiny
ISP), you can just get another ATMega328p and use our updater app to flash it.
4. Does the bypass LED turn on and off as you toggle the bypass foot switch? If not...
A. Are the lugs on the bypass foot switch shorted (use your continuity tester to see if they are
connected when the switch is not being pressed)?
•
If they are shorted, (neatly) re-solder the bypass foot switch wires to the board.
B. Is the bypass LED in the correct orientation?
•
Check this with your meter’s diode tester. With the red probe on the LED’s square
pad and the black probe on the round pad, the meter should read around 1.7V
(which is the forward voltage drop of the LED). If it reads around 1.5V then
reverse the probes and check again. If when reversing the leads (red on round,
black on square) it gives a reading of 1.7V, it means the LED is in backwards.
5. Does the pedal pass audio through it (can you play your guitar through it) when the bypass LED
is OFF? If not...
A. Are your instrument cables working properly? I know it’s dumb, but this happens more than
you’d think it should.
B. Are the input and output jacks soldered properly?
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