What is wrong with my wiring? No sound..

[bt2513]

I've been over it time and time again and I can't for the life of me figure out why I have no sound.  This is an SHO clone...

Some background:
- wired it up without the switch first and it worked fine
- added the switch and an LED and no sound
- took out LED and no sound
- bypass works fine
- when not bypassed, there is no noise made when plugging/unplugging power jack
- can't for the life of me figure out what I've wired wrong... maybe its just late and I'm tired 

White wire from board = board input
Yellow wire from board = board output
Black = Ground
Red = V+

[tomek]

Sounds like your switch wiring is messed.  Can't help you T/S that one, but if you want "true by-pass"

this method works for me.




1 - Connect pins 3 and 6

2 - Connect circuit input to pin 5

3 - Connect pins 4 and 9

4 - Connect pin 4 to the input jack tip

5 - Connect pin 2 to circuit ground

6 - Connect pin 1 to the indicator LED cathode (-)

7 - Connect pin 7 to circuit output (usually the volume pot)

8 - Connect pin 8 to the output jack tip

9 - Connect output jack ring to circuit ground

10 - Connect input jack ring to output jack ring

11 - Connect LED anode (+) to a 1K-10K resistor, then to circuit (+) (A lower value will give a brighter LED, but drain the battery faster, so experiment and see what you need)

12 - Connect battery negative to input jack sleeve

13 - If no AC adapter, connect battery positive to circuit (+), and you're done!

14 - If you have an AC adapter, connect battery positive to middle lug on AC jack (so that the "switch" disengages when a plug is inserted)

15 - Connect AC jack tip to circuit (+), and you're done!

[LucifersTrip]

If you're really sure you wired the switch correctly (I would triple check), I'd check the switch with a DMM to make sure you didn't solder the switch to it's death.
I've done that with a couple smaller switches.

You can also use clipleads to bypass the switching to check if your circuit still works.

[bt2513]

OK..

Unwired everything back down to the jacks and the circuit board (with onboard pot).  No sound.

I've probed a bit with my DMM and from what I can tell, nothing is making it to the output jack.  The output board connection seems to be fine but it appears that the entire output solder "pad" (or tiny glob) is dead.  Any ideas what would be causing this?

The input side seems to be fine.  When I plug my amp into the input jack I can hear the pot sweeping back in forth when I turn it.  I have nothing on the output jack.

[bt2513]

Fixed the output problem.. something came unsoldered during assembly.  Also notices a broken solder joint around the output and repaired that too.

I now have sound but the volume is very low and the treble is muted.. like a tone knob turned all the way down.  Would this be a sign of a damaged cap?

[jable1066]

I would go over every joint again with a light and mag glass if you've got one. If not just look at each joint under good light to look for any more areas where solder may not be sticking down. Once you've gone over each joint again, check nothing is shorting out and check that there is no solder bridges. Barry from guitarPCB.com has a really good wiring diagram on his site... http://www.guitarpcb.com/apps/forums/topics/show/2278418-easy-pedal-wiring-diagram-works-for-most-pedals-. If you follow that wiring diagram you should be cool. It sounds as though there could be a cold/dry joint however. If you have no luck after that post some detailed pictures of the component side and solder side of the board and people can get a better look at it. In my very limited experience when I have sound, but it's not quite right like yours, it's been my shoddy soldering - not a parts failure. A hot iron usually does the trick!

[LucifersTrip]

Fixed the output problem.. something came unsoldered during assembly.  Also notices a broken solder joint around the output and repaired that too.

I now have sound but the volume is very low and the treble is muted.. like a tone knob turned all the way down.  Would this be a sign of a damaged cap?

...just to be clear & recap...

1) You first wired it up without a switch and it worked fine. 2) You then wired the switch and led & got no sound. 3) You found some bad joints, repaired them and now you have sound again, but not as in 1) ?   I doubt if the cap is damaged. For me it's always been just good or bad.  But it sounds like you're still missing a bad joint or accidentally soldered something together during your repair that changed the tone.

It is very common that if something is not making a good connection that you will get a low or dull sound. It happens all the time when one of my clip leads is not making good contact.

...and the longshot. If you overtighten the 1/4" jacks you can sometimes cause a bad connection with the guitar plug. This happened to me twice with low quality (cheap plastic) ones and took me a while to diagnose....but it looks like you have quality (heavier plastic or fiberglass) ones.

good luck