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PostPosted: Tue Sep 27, 2016 10:26 pm 
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Hello!

I got a kit for a 5 Knob Compressor and assembled it, but it isn't really working.

When turned on, the pedal does not compress. In fact, the only knobs that appear to do anything are the ratio and level knobs.
The level knob functions how it is supposed to.
The ratio knob only works if it is somewhere in the middle of its sweep. If it's all the way to the compressed side, no sound. If it's all the way to the dry side, still no sound. If it's somewhere between those two then signal comes through.

I have gone through and resoldered/reflowed again because I was told some spots seemed a little solder starved and it didn't change anything.
I even found a spare 10k pot to try just in case my kit's pot was defective. No change.

Any ideas as to what the problem could be?


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PostPosted: Tue Sep 27, 2016 10:27 pm 
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Here's one more picture


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PostPosted: Wed Sep 28, 2016 5:38 am 
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The soldering of the pots to the PCB look iffy at best. Specifically lugs 1&3 of the Level pot and lugs 1&2 of the Ratio pot. All 3 lugs of the Sustain pot look a bit solder starved. I suggest going back and soldering them again. Be sure to get good heat transfer from the iron to the pot lug and solder pad. Poor heat transfer while soldering is the #1 problem we see with most builds.

Some of your solder joints look cold. There may be more that we can’t see since they are hidden by the pots. Make sure your joints have a good cone shape to them. If they look like a hook or barb they are cold and need to be corrected. There might be a few solder bridges as well. You’ll need to take a close look. If they have a trace connecting the pads together then the bridge is not a problem.

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PostPosted: Wed Sep 28, 2016 10:22 pm 
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Thanks.
I looked into that and added some more solder to the pots. I looked around at the other solder points and tried to tidy up anything that didn't look pretty. They seem to all have cone shapes to them, I just left more of the wire sticking out than was needed. I've cut off any wire that sticks up too much now.
Still no change in the pedal.


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PostPosted: Thu Sep 29, 2016 3:42 pm 
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Please take voltage readings of the following places:

Pin 9 of the BA6110
pin 6 of BA6110
center lug of ratio pot
center pin of Q1
center pin of Q6
center pin of Q7

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Please do not PM me. email is prefered. keith@buildyourownclone.com


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PostPosted: Thu Sep 29, 2016 4:59 pm 
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Battery Voltage: 8.65V
Pin 9 BA6110: 8.65V
Pin 6 BA6110: 3.32V
Center Ratio Pot: 0.0V
Center Q1: 1.51V
Center Q6: 0.85V
Center Q7: 0.85V


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PostPosted: Fri Sep 30, 2016 1:25 pm 
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I think those voltages look good. You're going to need to build a signal tester and trace out what's going on with your signal. The way you describe the ratio pot makes no sense at all. It is a passive crossfader. All the way clockwise is 100% compressed signal. All the way counter clockwise is 100% dry signal. It makes no sense that you wouldn't get signal at either extreme of the pot, but you get signal when the pot is at center rotation. If you got all compressed and no dry, or all dry and no compressed that would make sense. Unless you have a short somewhere, what you are describing is not possible.

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Please do not PM me. email is prefered. keith@buildyourownclone.com


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PostPosted: Sat Oct 01, 2016 1:40 pm 
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Ok. I made a signal tester and found a sloppy area right before the dry side of the ratio pot. I fixed that and now the ratio pot has sound when all the way dry, but still nothing when all the way right. I poked around and tried to follow the schematic and the last point I have signal on the compressed side is pins 6 and 7 of BA6110. Is the IC possibly broken?


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PostPosted: Sat Oct 01, 2016 1:49 pm 
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One more update.
I was talking to Nick here from BYOC and he sent me a replacement BA6110 and I swapped it and now the pedal works!!


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PostPosted: Mon Oct 03, 2016 11:06 am 
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Glad to hear you got it working!

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Please do not PM me. email is prefered. keith@buildyourownclone.com


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