This pedal board quit completely during the church service. Joe got it going again by rewiring around everything after he realized that the power supplied from this pedal board died. Could the Unbrokenstring Crew get to the bottom of this issue?
Joe has his name on everything! This pedal board is actually a big rugged tool case, with a self-contained power supply for all the pedals. Velcro holds everything in place. As this problem did not actually involve any pedals, they were removed before we got this unit to repair.
This is the model number.
This is the serial number.
Company name and nation of origin. Not China! (Yes, I am one of those people.)
This panel distributes audio and power in and out. When power is applied, there is no power out.
This is a closeup of that panel. HINT: You can use any 9v negative center power source, with sufficient capacity.
Audio jacks are on the right, and power is on the left. This whole assembly is wired like a loop-back panel.’
Removing the connectors allows full access to the circuit boards.
Interestingly, the middle board shares power.and audio. See the diode?
Examination of the solder joints reveal excellent workmanship.
This diode on the center board is a anti-polarity-reversal diode. This prevents bad power from reaching the pedals. When this diode has failed open-circuit, it prevents ANY power from reaching the pedals.
This diode is equal or better than the original part and is the highest-spec’d part that would fit on the board.
Reassembly is the reverse of disassembly.
Audio and power functions are now completely restored!
Thanks for reading all the way to the end!
CONTACT – David Latchaw EE
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