oasis problem

[MarcoCrt]

Hi i m new in the forum,
I tried to mount the oasis kit but something didnt work, initially there was only the 3-position switch that in one of the three made a strange sound similar to a gloomy fuzz, and raising the volume over 70% became mute .
Then it started to stop working even in the central position, and now it only goes to the left position. the other things seem to work, only bandwith I dont feel the difference from one position to another.
I dont understand what I could have done wrong, I checked several times. I will try to unsolder the switch to check it.

What else could it be?
Thanks

 

[music6000]

Did you wait for toggle tabs to cool down between soldering Toggle switch.
You should solder one Pad, PAUSE, Skip the next, Solder next Pad, Wait a Minute!!!
Repeat process to missed Tab.
Remove the Damaged Toggle and for testing, try a jumper wire from Middle Pad to End Pad on PCB to see if it functions, Repeat jumper wire from Middle Pad to opposite End Pad & see if that works

 

[MarcoCrt]

No I did not wait, thank you tomorrow I'll try to do as you said

 

[music6000]

No I did not wait, thank you tomorrow I'll try to do as you said

Did you have a Win?

 

[MarcoCrt]

I removed the switch that got ruined by too much heat. without that there is no sound. in the central position + right it works, central + left plays but no gain control that remains at zero.

 

[MarcoCrt]

I must say that during assembly due to misleading instructions I soldered the inverted LED d5 and to remove it it was a disaster, I ruined the PCB at that point, so I connected the LED directly with a wire connecting the left pin of 2n7000 ( q3) with the pin of the IC1 next to the diode d3

 

[MarcoCrt]

should I connect the LED to something else?

 

[MarcoCrt]

no the d5 should be between c10 and c11

 

[music6000]

Sorry, Without pictures it's hard to decipher what is being talked about.
This looks like the alternative's you have.
With a Digital Multi Meter, Do a Continuity check on the ones I highlighted

 

[MarcoCrt]

ok today i will do this, but the pcb also has a circuit on the opposite side, is there anything that could be interrupted?

 

[music6000]

If it was me, I would place the LED directly on these 2 points underneath.
The LED Long leg (Anode) at 22k Red dot. The short leg (Cathode) at 2N7000 Green dot.

 

[MarcoCrt]

that's what I did but it didn't seem to work well, so I moved to the opa2134 pin, but it still doesn't work.
another strange thing is that the LED turns on as soon as I connect the power, even if the foot switch is set to off, and changes intensity by changing the position of the 3-position switch.

I have to check what you were saying before, however it would be useful to have a drawing on the back of the pcb to see if the led connects something even on that side

 

[MarcoCrt]

If it was me, I would place the LED directly on these 2 points underneath.
The LED Long leg (Anode) at 22k Red dot. The short leg (Cathode) at 2N7000 Green dot.

I connected the diode, then the opa2134
I will also try with the 22k

 

[music6000]

Put a jumper wire from 22k & LED Anode to Q4 2N7000 as pictured.

 

[MarcoCrt]

Put a jumper wire from 22k & LED Anode to Q4 2N7000 as pictured.

do you mean for the back of the pcb?

 

[music6000]

Yes, It should work as designed if there is no damage to components.

 

[MarcoCrt]

so is it right?

 

[music6000]

Yes, You got it.

 

[MarcoCrt]

sorry but the c12 c11 c10 capacitors in the pin you marked there is the positive pole, is it correct?

 

[music6000]

This is all you need to do as listed above.