BYOC Envelope Build Problem (Pedal Only Lights Up w/ Plug Partially Inserted)

Started by NCSUZoSo, December 12, 2013, 06:36:25 AM

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NCSUZoSo

http://buildyourownclone.com/effects-pedals/eq/envelopefilter.html

Ok guys, so this has me scratching my head and I have removed the PCB and checked all solder points and how it is wired, everything looks good.  Even BYOC Tech Support couldn't spot anything obvious.

Basically the problem is the pedal LED comes on when the plug is partially inserted, but if you move it at all in either direction (including plugging it in all the way) the LED goes off.  The point at when the pedal lights up is when that insulated part of the plug hits the tip part of the jack.  Does this give anything obvious off the bat by knowing that?  

Here is a picture of the board prior to re-soldering the input connections and making them more solid.  (Sadly this build didn't come out as clean/pretty as my ESV Bender build):



Full Size: http://www2.picturepush.com/photo/a/13915770/img/Guitar-and-Related/DSCF3382.jpg




Full Size: http://www5.picturepush.com/photo/a/13915768/img/Guitar-and-Related/DSCF3379.jpg


You can see in these pictures how the plug has to be inserted to light up the LED (yes the LED is oriented correctly, I double checked this with a multimeter).

So far the only issues I have found is that 2 potentiometers are swapped incorrectly (both are 100K though, I think just the sweeps are different).  I even re-soldered all three connections going to the input jack.

Thanks for any help or tips.

(I'll have pics of the backside of the PCB as soon as I can)



Edit:  Here is the backside of the PCB, sorry for the iffy quality, but I had to have a coworker use their phone for the picture (I work 3rd Shift):




So far everything I have checked for continuity is correct, including the entire foot switch.



When I touch the solder contact point for the ring it will show continuity at both plug contact points (is this supposed to happen?). If I touch the tip (in), it has continuity with one of the plug contact points (the longer of the two).

Now when I consider this is happening that would be a short between ring and tip if the ring is flowing at both points.


EDIT: It only does this with the battery plugged in... This goes back to what I told BYOC and they said it did not matter, now I thinks it does. the traces were partially cut by alligator clips from my "Helping Hands" and now when I touch the negative solder point at the battery and the tip solder point, the light comes on. There is something weird going on with the battery plugged in that is not happening when it is unplugged.

Can someone explain to me why the ring is actually touching the sleeve of the jack?  Does this have anything to do with why it lights up (won't output sound though) when it is about 50% inserted?

Mark Hammer

BYOC has supplied what you used, and from the pics I can see (picturepush boocked at work), everything seems to be soldered in the right place.

However....

The pic I can see shows the input jack uninstalled.  What I'm wondering is whether the issue is one of the jack needing to be rotated a bit such that pushing the plug all the way in (and there are far too many immature jokes prompted by that to list here) results in a lug being nudged over and shorting out against something else.

Yet another one of those it-worked-before-I-boxed-it-up affairs.

dwmorrin

Looks to me like the footswitch is rotated 90 degrees and thus wired incorrectly.

NCSUZoSo

damn, you are right.

the foot switch is rotated 90 degrees.... how did I miss that.. (and how did BYOC not notice it)

deadastronaut

https://www.youtube.com/user/100roberthenry
https://deadastronaut.wixsite.com/effects

chasm reverb/tremshifter/faze filter/abductor II delay/timestream reverb/dreamtime delay/skinwalker hi gain dist/black triangle OD/ nano drums/space patrol fuzz//

NCSUZoSo

The sad part is I spent probably 5 hours going over it while working 3rd shift IT (paid do it though, lol) and BYOC Tech Support saw it multiple times (not putting it on them, they have been great about any issues (like missing parts)).

Forgot to say thanks for pointing that out, you are the first of many people to notice it.

dwmorrin

Quote from: NCSUZoSo on December 12, 2013, 11:18:41 AM
damn, you are right.
That was a "thanks" in my book! ;D
Only so many ways to light a LED through a jack.  Once the connections one the jack looked good, my gaze went to the footswitch - and aha!
Always helps to have a lot of pairs of eyes on a problem.

NCSUZoSo

Just wanted to officially say that was the problem, the pedal works beautifully now!

Thanks to everyone!