Ridiculous but I need help troubleshooting a Paradise

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Seano

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I'll post up some pics in a while but can someone tell me what voltages to expect at the IC pins in this pedal? This thing only has like 9 parts and I can't figure it out its problem.:rolleyes: I get bypass signal fine, but when I click on the switch, I just get a white noise mess. The pots seem to affect the noise but no guitar signal goes through.
Thanks.
 
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Robert said:
Post a pic of your build and if possible list the voltages you have on the IC.
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Thanks for responding and I will, but can you tell me what I should expect to see at the IC? I just figure if I'm in there taking pics and measuring voltage, I might be able to figure it out myself, this being a relatively simple circuit. I'd like to learn what to expect at the IC. Hope that doesn't sound like I'm being obstinate, I just like to learn as I go.
 
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KR Sound said:
From another thread:

1 : 1.347v & 8: should be exactly the same, they are Linked.
2: 0v
3: 8.8mv
4: 0v
5: 5.98v
6: 9.22v
7: 4.66v
8: 1.347v
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Thanks. This is what I was looking for. I appreciate it. I can figure it out I think, once I know what to look for and while I know there's a way this forum does things, I'd really like to solve it as independently as possible. Thanks again.
 
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spi said:
In all my years building pedals I've never had an issue that was solved by looking at IC voltages.

I guess some people have because it comes up time to time in troubleshooting threads, but it seems like a last resort.

I would start with checking your wiring, soldering, and component values.
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I flowed and reflowed all solder joints, even tried a new footswitch, IC and DC jack. Checked and double checked the i/o jacks. I even triple checked component values and orientation of the electrolytics before making the thread . Even used a magnifier to look for shorts. I feel like maybe I cooked one of the caps.

Bypassed signal is fine. The drive pot seems to affect the white noise.
I'm just annoyed because this is the simplest build I've done since taking up this hobby, I feel like I should be able to figure it out.
 
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Example... last week I resorted to checking the voltages on the pins of my 555 chip on a Sushi Box FX Particle Accelerator. I was reading 9V on every pin of the chip.....

Which of course meant that I had the + and - connections to power reversed... doh!
 
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Seano said:
I flowed and reflowed all solder joints, even tried a new footswitch, IC and DC jack. Checked and double checked the i/o jacks. I even triple checked component values and orientation of the electrolytics before making the thread . Even used a magnifier to look for shorts. I feel like maybe I cooked one of the caps.

Bypassed signal is fine. The drive pot seems to affect the white noise.
I'm just annoyed because this is the simplest build I've done since taking up this hobby, I feel like I should be able to figure it out.
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Been there... Do you have an audio probe?
 
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OK, so voltage look pretty good except for pin 3. I'm reading 0 there and should have 8.8. Thats the pin that connects to the input, if I'm reading the schematic correctly.
 
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So if I'm not reading proper voltage at that pin but everywhere else is fine, would I assume its something between that jack and pin or would that be incorrect? All there is there is the drive pot, jack, 2 caps and a resistor.
 
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Seano said:
So if I'm not reading proper voltage at that pin but everywhere else is fine, would I assume its something between that jack and pin or would that be incorrect? All there is there is the drive pot, jack, 2 caps and a resistor.
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that pin shows 8 millivolts not volts. Your setting in your dmm might be showing 0 because it’s set to 20v not the millivolt setting. If you are getting white noise I would wager you have your input jack and output jack backwards. It will work in bypass this way and give you some white noise with the effect on. I’ve done this more times than I care to admit.
 
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Locrian99 said:
that pin shows 8 millivolts not volts. Your setting in your dmm might be showing 0 because it’s set to 20v not the millivolt setting. If you are getting white noise I would wager you have your input jack and output jack backwards. It will work in bypass this way and give you some white noise with the effect on. I’ve done this more times than I care to admit.
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I didn't see it said millivolts, thanks. hmmm... I'll check the wiring again. How about the jack itself? Could a defective jack cause the same symptom?
 
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Defective jacks are pretty unusual - especially if they are new. If they've been plugged/unplugged a few thousand times or left for years to oxidise that can be a problem. In any case it's easy to check - plug a (known good) lead in and check continuity from the tip to the signal wire coming off the socket, and from the shield to the ground wire.
 
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Your jacks are fine it works in bypass. Could always audio probe this. Would probably take 30 seconds to figure out where the issue is. A picture would help to narrow our suggestions down as well.
 
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