Lemon Rockerverb- no sound when engaged

[megatrav]

I've been working on this build from guitar pcb mania.
I have bypassed sound. No sound when engaged but I do have an LED.
I took some shots of the board and I can't spot any bad connections so I think I might have the switch Ground and Control backwards. The PCB only says CNTRL.
I haven't tried swapping them yet but I wanted to post here to see if anyone might catch something else I may have done wrong.

Thanks!

 

[BuddytheReow]

Are those 2 ground wires coming out of the board? Scratching my head why....

 

[megatrav]

if you have an old guitar cable, a little bit of hookup wire and a .1 uf capacitor somewhere I would recommend making an audio probe.

I may have to go see about getting some gator clips and making one

 

[megatrav]

Are those 2 ground wires coming out of the board? Scratching my head why....

If you're referring to the top of the board the 3 ground wires are for the in/out jacks and dc jack

 

[music6000]

If you're referring to the top of the board the 3 ground wires are for the in/out jacks and dc jack
View attachment 16585

Can you Confirm you have Continuity on the matching Coloured Circles on the 4 J201's pads as pictured :

 

[megatrav]

Can you Confirm you have Continuity on the matching Coloured Circles on the 4 J201's pads as pictured :

View attachment 16586

Q4 is good to go. I actually performed the same test on all the Jfets and Q2 blue doesn't appear to have continuity.

 

[BuddytheReow]

If you're referring to the top of the board the 3 ground wires are for the in/out jacks and dc jack

I was referring to the footswitch

 

[megatrav]

I was referring to the footswitch
View attachment 16588

I'm not sure what you mean?
Would you be able to edit the pic?

 

[BuddytheReow]

OP says Ground and Control. Those 2 wires. What is the control for?

 

[music6000]

OP says Ground and Control. Those 2 wires. What is the control for?

Control is SW

 

[music6000]

Q4 is good to go. I actually performed the same test on all the Jfets and Q2 blue doesn't appear to have continuity.

Use a piece of Resistor lead & Solder between the 2 pads in blue on Q2 board, It maybe your issue!
Sometimes flux can give a false result!

 

[music6000]

Q4 is good to go. I actually performed the same test on all the Jfets and Q2 blue doesn't appear to have continuity.

I actually listed all 4 J201's needed testing in my original message, not just Q4 lol !

 

[zgrav]

asking the obvious question for the symptom you described (sound in bypass, but not when engaged) -- are you sure you have the in and out jacks plugged in correctly?

 

[megatrav]

asking the obvious question for the symptom you described (sound in bypass, but not when engaged) -- are you sure you have the in and out jacks plugged in correctly?

I believe so since I am able to get sound from my guitar when bypassed

 

[BuddytheReow]

I believe so since I am able to get sound from my guitar when bypassed

He's asking because if you've got your in out jacks wired backwards then bypass will work but not when engaged

 

[music6000]

I believe so since I am able to get sound from my guitar when bypassed

Just confirming, Your guitar lead is plugged into the Input jack of the Pedal & Output Jack of pedal is going to Amp.
I have accidently plugged them in the wrong way more than once when the Pedal or Circuit is upside down on the Floor !!!

Have you fixed the Continuity issue with Q2 Blue Pads?

 

[megatrav]

Just confirming, Your guitar lead is plugged into the Input jack of the Pedal & Output Jack of pedal is going to Amp.
I have accidently plugged them in the wrong way more than once when the Pedal or Circuit is upside down on the Floor !!!

Have you fixed the Continuity issue with Q2 Blue Pads?

I did. All the jfets now have continuity. Unfortunately I still don't have any sound
when the pedal is engaged.

 

[music6000]

I did. All the jfets now have continuity. Unfortunately I still don't have any sound
when the pedal is engaged.

Confirm that the guitar lead is plugged into the INPUT jack of the Pedal & Pedal OUTPUT jack is going to the Amp :

 

[megatrav]

Confirm that the guitar lead is plugged into the INPUT jack of the Pedal & Pedal OUTPUT jack is going to the Amp :

View attachment 16612

Yessir that is how I have it connected. I actually tried the other way too just to make sure.
When the pedal is engaged and connected the correct way there is a hum.

 

[music6000]

Yessir that is how I have it connected. I actually tried the other way too just to make sure.
When the pedal is engaged and connected the correct way there is a hum.

Why does Q2 SMD look different to the other 3, Are they all the same Manufacturer?
Where did you purchase these?

 

[temol]

audio probe.. audio probe.. audio probe... au....