BOSS DD-3 repair help

samboskull · #1 04-02-2012, 04:14 PM

I have a DD-3 pedal, always worked, but I hadn't used it in a while due to not being in a band. So I decided to set up my pedal board and do some trimming and what not and noticed the DD-3 has stopped giving out sound. Now, the direct out works, and if I crank my amp I can hear the AC hum.

One forum said it was underpowered, and the user manual also says this. However it was running off AC power. It's a multi-voltage power adapter set to AC 9V and all my other Boss pedals work with it. I do believe the DD-3 takes quite some power though so maybe the current is lacking.

Anyways I've ordered a Boss PSC-100 to plug into my BCB-60 (No idea how I lost the original power supply, probably gig gremlins) and hopefully that will work, but in the mean time, I've taken off the bottom of the DD-3 to have a peek inside.

To remove the PCB completely you have to take off the pots, and right now I cba completely dismantling something that can be solved with just the correct PSU. However I pulled the PCB a bit and looked inside and I couldn't see any wires soldered onto the output port. On the other side of the coin though, I couldn't see any wires that didn't connect to anything and there is one side of the port I couldn't see without totally dismantling it.

I was wondering if anyone else had experience in this, and might be able to share some wisdom? I really don't want to lose this pedal, I love it's clean cut digital feel and the space-y tones you get out of it.

samboskull · #2 04-07-2012, 11:27 AM

Right the new BOSS power supply came, and it didn't work, the pedal still has no output through the effects chain, only through it's Direct out. I'm going to open it up now, but I have no idea what to look for. I'll update with my findings haha

UPDATE: Opened it up, pulled everything out, no crossed or broken connections. Poked around and nothing. I'm guessing one of the resistors or diodes has blown. Going to have build an audio probe with the looks of it!

RickenBoogie · #3 04-07-2012, 02:52 PM

If you ran 9 volts AC into it, it's probably been fried.

Schlatte · #4 04-07-2012, 03:06 PM

Quote:

Originally Posted by RickenBoogie

If you ran 9 volts AC into it, it's probably been fried.

Not necessarily... every boss pedal I repaired had at least one protection diode in it. So you just replace one diode and the whole thing is fixed.
Also- If it really was fried, why would the second output still work?

TomA1234 · #5 04-08-2012, 02:58 AM

Try tightening all of the nuts on the pots and in/outputs. My chorus pedal stopped working due to this as that is where the ground connection is.

If that doesn't work, then you probably fried it with the AC and it is probably a matter of time before your other pedals are fried.

bassmanbigs · #6 03-26-2013, 09:57 AM

I am repairing a DD-5 and after the D1 Diode was replaced the pedal could send a signal through but it has no effect in it. And the switch does not turn off the LED.