6. Test the wet signal path A with the signal test probe. PURPLE 1 - 22 is signal path of
the wet delayed signal from the output of the first delay chip to the input of the second
when the pedal is in normal echo mode, not pingpong mode. If the first delay chip is
receiving dry signal to PIN16, but is not producing a delayed signal at PIN14, then there
is a problem with the chip. Make sure it's oriented correctly.