Park and ride Volume problem

[nicubarbieru]

Great kit,convinced tones
But the Volume potentiometer seems that is not working.
I checked everything,all looks good.
By turning left right the volume potentiometer nothing is happening.
The volume remains the same.
And it is lower than I need
Some thoughts and help ? Tks.

 

[nicubarbieru]

Not any soldered bridges on pcb

 

[nicubarbieru]

View attachment 84189

That does sound suspicious.

I believe @jimilee is right about R100 being the CLR, and that it shouldn't be causing your problem, but if there's some doubt about what's going on, starting with the right parts in the right places can't hurt.

Changed R100 with 4k7 value
The LED is brighter…,in rest no changes in volume level.
Any solution to rise up the output signal?
Even a fixed and forgetting volume level.
I am looking to use the pedal for guitar solos parts

 

[nicubarbieru]

Exactly..I will put a right 4k7 in place of R100

I put a 4k7 fir R100
Nothing new…just a brighter LED

 

[Erik S]

It's strange that there's no change when you adjust the volume pot. I know you already did some testing there, but I might try and verify with your meter that the resistance value changes as you rotate the pot just as a double check.

I'm not a very advanced troubleshooter, but looking at the stuff in the schematic around the volume pot, if you've verified that all those parts are the correct value, the pot appears to be functioning, and there are no bridges or questionable solder joints, the TL072 opamp would be the next thing I would wonder about.

@jimilee mentioned that you might want to check the voltages at each pin of that op amp and post your results. I'm not sure what they should be, but others would be able to give you some feedback if any of those looked way off.

 

[nicubarbieru]

Yes,TL072 is the next ..
I will change it and see.
The potentiometer itself working normal
Variable resistance values when rotate the pot,etc.

 

[nicubarbieru]

I have not an available TL072
But I took out the volume pot and replace it with a simple bridge between the legs
Same volume…
And bigger noise

 

[jimilee]

You’re going to be stabbing in the dark all day if you’re not methodical about it. You’re getting audio, so it’s most likely not an IC.

 

[nicubarbieru]

You’re going to be stabbing in the dark all day if you’re not methodical about it. You’re getting audio, so it’s most likely not an IC.

Yes,you are right
Thar’s why I double checked all the components and soldered points.
Especially around the volume pot.
All looks good.
But stil the volume pots is not working
I replaced it with a simple wire bridge.
Nothing changed

 

[BuddytheReow]

Is the volume quiet or loud?

 

[nicubarbieru]

The volume with effect On is lower then the direct signal
If the direct signal ( pedal off) the volume is 2 o'clock, with the pedal on is at 1

 

[jimilee]

audio probe

 

[nicubarbieru]

I thought that if I will buy a new kit I will be in the safe side..
NO. I have the Same problem with the signal volume !
all is working perfect,exemopt teh volume signal out who remains fixed does not matter I do.
Even I have by passed the volume pot,the volume signal remains the same ...
As long the volume is lower then in the by pass mode,the pedal is useless.
Anybody here can tell me how to rise the volume just to use the pedal in solo guitar parts?