Boss DD-3 Delay Pedal - Troubleshooting and Repair (#001)

Troubleshooting and repairing a Boss DD-3 Delay Pedal. This is an earlier version which appears to share the same schematic as the DD-2 and has all through-hole components.

Symptom: No sound at the main output.

Clarification: The 400mV note at 1:56 is peak to peak voltage.