SOLVED Viceroy Build Not Working

[PraisetheSunn0]

Currently working on a Viceroy boneyard edition. Bypass works, but the effect does not come on, nor does the LED. The "Juice" switch LED does turn on though.

Q1 is a 2n5457, instead of the PF5102 that is called for. Would that perhaps be causing the problem?

Pics incoming

 

[PraisetheSunn0]

I appreciate the help. The power situation is fixed.

Bypass is now working fine, I can turn on the effect, LED comes on, but the sound is really low, noisy, and intermittent.

 

[music6000]

I appreciate the help. The power situation is fixed.

Bypass is now working fine, I can turn on the effect, LED comes on, but the sound is really low, noisy, and intermittent.

Make sure those 3 pot Backs in the middle of the PCB are not touching the PCB!!!!

 

[PraisetheSunn0]

Make sure those 3 pot Backs in the middle of the PCB are not touching the PCB!!!!

They are not

 

[TravisM]

It is time to validate voltages. Start with VCC and ground throught the signal path and then measure the source to gate volatage (I think that is the one to check in this configuration, maybe someone else can correct me).

 

[PraisetheSunn0]

I spent an hour last night verifying continuity for the entire circuit. Everything seems fine.

So I went through it with the audio probe and I get guitar signal on pin 3 of Q1 but nothing after that.

 

[music6000]

I spent an hour last night verifying continuity for the entire circuit. Everything seems fine.

So I went through it with the audio probe and I get guitar signal on pin 3 of Q1 but nothing after that.

Q1 is suppose to be PF5102, might be causing the issue????

 

[PraisetheSunn0]

Q1 is suppose to be PF5102, might be causing the issue????

Yeah that was my original thought.

 

[PraisetheSunn0]

Well the PF5102s came In yesterday, swapped it out, same issue. Back to square one. Tearing my hair our a bit.

 

[carlinb17]

have you tested continuity on the foot switches? another thing you can try for the led is set your ddm to the diode setting, attach the Leeds to the led appropriately and the led should light up a little bit, you can test to see if that is working or if it's burnt as well as the orientation of it. The bypass switch looks a little melted on the side, I can't imagine this has anything to do with it but did you have issues wiring it initially?

 

[PraisetheSunn0]

Footswitch is fine. Tested that for sure. LEDs are fine. Both come on when they should. Bypass works. When Circuit is engaged it just makes this low buzz. Knobs seem to even work (they affect the volume, tone, etc of said buzz)

Audio probe gets guitar signal up to pin 3 of Q1 and then nothing.

 

[music6000]

Footswitch is fine. Tested that for sure. LEDs are fine. Both come on when they should. Bypass works. When Circuit is engaged it just makes this low buzz. Knobs seem to even work (they affect the volume, tone, etc of said buzz)

Audio probe gets guitar signal up to pin 3 of Q1 and then nothing.

Check for Continuity on matching Circles:

 

[PraisetheSunn0]

Check for Continuity on matching Circles:

View attachment 24084

Everywhere is good except 2nd pin of Q1 to R4.

 

[music6000]

Everywhere is good except 2nd pin of Q1 to R4.

Solder a piece of resistor lead between the 2 pads on the underside of PCB, it may be your issue!!!

 

[PraisetheSunn0]

Jumper did the trick. I noticed that one little place on non continuity a while ago but assumed I was screwing up. Should have trusted myself. Works great now thanks so much everyone! Now I have to find some good knobs...

 

[music6000]

Jumper did the trick. I noticed that one little place on non continuity a while ago but assumed I was screwing up. Should have trusted myself. Works great now thanks so much everyone! Now I have to find some good knobs...

View attachment 24095

Make it a point to test for Continuity where there has been an Issue with a Component or that has been replaced every time you do a Build.
Next Pedal !!!


Cheers music6000