UberDrive (no signal with effect engaged) *now with extra updates!*

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gutter0909

New member
Hey all,

Second pedal not working right off the bat and second thread I've started. No shorts, everything seems to be wired up correctly compared to the directions. The power works, LED is good but no sound with effect off or on. No sound period. I get the buzz if I touch the tip soldering point for both the input and output.

I'm so lost. I'm also getting discouraged because I'm 1 for 3 so far for pedals that aren't kits and I've screwed up 2 enclosures with crap drilling.

Please help! Thanks in advance.
 

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Okay, I'll give that a shot. The metal is continuous over the top so I thought it wouldn't matter which side they were soldered to but I will move those two and see what happens. I'll update later this evening. Thank you!
 
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Do you have a multi meter? I would check what voltages you are getting at the 8 pins of the op amp. Put the negative lead on ground and tap the positive lead to each of the op amp's legs in succession and post here what your voltage readings are.
 
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Ok those values all look correct. We've verified the op amp is secured in place correctly and operating correctly as well.

Silence when the circuit is engaged usually means the signal is shorted to ground somewhere.

How are the pins underneath your tone pot? On the backside of the switch PCB, are any of the leads touching each other?
 
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I have scoured this thing and I can see no possible shorts or bridges. I re-flowed a bunch of the connections that looked even slightly off and no change.

What are the chances it's the board? Maybe a faulty footswitch? I'll try swapping the 3pdt later today to see if that makes a difference.
 
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The footswitch may be possible. IME, I've only received one dud in the mail. If it works in bypass we can confirm the 3pdt half works (which I think is position 1 in the pic below). You can use your meter to check for continuity on the switch itself.
1775578867224.png

Does the circuit work when it is not boxed in the enclosure?
 
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I can't fully remove it from the enclosure due to the DC jack but I was able to isolate it from the enclosure using a cloth and no change to the situation. I'm assuming that was to check to see if it's getting grounded on the enclosure?

However, when checking continuity with the 3pdt, I get continuity in, say, position 1 but nothing in position 2 so I'm going to swap the 3pdt and see what happens.

Thanks for the ideas!
 
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Why'd you circumcise your solder joints? Clip the leads, not the solder. Puts unneeded stress on the joint and can screw up the through hole trace connection. Not fun to track down. It's not like welding.
/end rant
 
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