November 17, 2019 at 12:06 am #7607
So I’ve built my first pedal, and I’ve come unstuck. I’ve read through the beginners guide here and gone through basic fault checking, but I cannot get a signal to pass through this pedal!
I’ve checked solder joints, all looking good. No dry joints or bridges.
I’ve checked polarity of components (including ICs) and all looking good there.
I’ve used continuity mode to go from input to output and my multimeter beeps.
I’ve checked each component and I’m getting a value returned on my multimeter.
I’m just testing it using alligator clips to go to a battery and jack sockets, but I cannot get a sound out of it.
Are there any other troubleshooting steps I have missed? What could be the problem here?
Thanks in advance.November 17, 2019 at 8:03 am #7608
Do you get power to the pcb and bypassed signal
Post pictures of both sides of the pcb and offboard wiring to jacks, 3PDT etc so that it can be easily tracedNovember 17, 2019 at 8:31 am #7610
Thanks for the reply. I get power, but no bypass signal. I haven’t wired the witch up yet as I just want to test it before going any further.
I’ll get a picture up later (it’s late here in Aus) to see if that helps.November 17, 2019 at 11:20 am #7611
Double check you’ve wired the T for tip pad on the pcb in and out to your jack tips
Its easy enough to get them wrong even if you are aware that the in and outs have one pad for jack tips labelled with a small T and another for grounding the jacksNovember 17, 2019 at 4:07 pm #7643
I did miss the T early on, but after reading the guide I did correct that.
I’m sending T to tips, the other pad to sleeve, 9v pad to + on the battery, ground pad to – on the battery. Does that sound right for testing purposes?November 17, 2019 at 4:41 pm #7645
Yes that will work to test it as long as you have 9v powering the board, everything that needs grounding connected to ground and your in and outs are correct it should fire right up
Are you using 2 mono jacks if using a stereo jack for in make sure you don’t have the tip or ground connection from the pcb going to the ring connection on the in jackNovember 17, 2019 at 7:54 pm #7659
Clear photos of the board itself front and back as well as separate photos of the off-board wiring would likely be very revealing. When there is no sound the wiring is usually the suspect. If we can see it may help.November 22, 2019 at 11:34 pm #7822
Why when I post images the post doesn’t show? Has it gone to a moderation queue or something?November 23, 2019 at 1:55 am #7824
There is no queue.
Here is a photo of Rory as a test.
Without knowing more all I can guess is to make sure you are using the photo icon in the menu bar and uploading an actual photo and not trying to post a link.November 23, 2019 at 3:18 am #7826
Ok, here’s another try. Maybe one picture at a time might work.November 23, 2019 at 3:19 am #7827November 23, 2019 at 3:21 am #7828
ok, looks like it was just an issue with putting two images in one post.
Wiring is just “T” pad to tip, other I/O pads to sleeve (using mono jacks for both), +9v to positive battery terminal and GND pad to negative battery terminal.November 23, 2019 at 11:48 am #7829
Do you have an image with the jacks and battery snap wired
A few of your solder joints look dry remove the ICs from thier sockets and reflow them all especially those that look dull
Also check you have continuity from the in and out T pads and the jack tips and all groundsNovember 24, 2019 at 12:56 am #7847
Thanks for the advice, I’ll reflow the solder joints and report back. Hopefully it’s just a few dry joints.November 24, 2019 at 1:15 am #7848
When you put everything back please take a couple photos showing the off-board wiring since that is a huge suspect when there is no sound. We need to see the wiring to Jacks and the wiring to the 3PDT switch especially.
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