SOLVED Duocast Hi/Low Gain channel

[u439857293874]

Hello, I put together this Duocast build and the regular channel works but the Hi/Low gain channel only passes clean audio. I traced it with the sound probe and I can't find where the problem is because I'm getting sound through the whole pedal. Looks like the Level 2 trim pot is the last in the chain according to the schematic. I'm getting the right audio up to the end of the chain so maybe its something on the 3DPT switch? Not sure why this is happening.

 

[Synchrony Pedalworks]

Hello, I put together this Duocast build and the regular channel works but the Hi/Low gain channel only passes clean audio. I traced it with the sound probe and I can't find where the problem is because I'm getting sound through the whole pedal. Looks like the Level 2 trim pot is the last in the chain according to the schematic. I'm getting the right audio up to the end of the chain so maybe its something on the 3DPT switch? Not sure why this is happening.

Can you take a better picture of the boost switch or verify your wiring? It is hard for me to tell, but I am wondering if you have two of the wires switched.

 

[u439857293874]

Yeah no problem.

 

[Synchrony Pedalworks]

It is still hard for my eyes to track the wires, but I am still suspicious. Check your wire so that it matches the picture below.

 

[u439857293874]

Just confirmed the wires are going to the right places

 

[u439857293874]

Round 2: Check for Continuity at these matching circles:
View attachment 32958

I'm going through this checking the points for continuity and I'm not getting anything on the red or dark blue dots.

 

[music6000]

To test for Continuity, you must disconnect Power supply to the circuit.

 

[u439857293874]

To test for Continuity, you must disconnect Power supply to the circuit.

Thanks for the tip! Looks like I am getting signal on the red spots now after I disconnected the power. Now its just the two darker blue spots and the yellow spot at the bottom that I'm not getting continuity.

 

[music6000]

Thanks for the tip! Looks like I am getting signal on the red spots now after I disconnected the power. Now its just the two darker blue spots and the yellow spot at the bottom that I'm not getting continuity.

Do you mean these 2 highlighted squares, The Trace runs around the outside edge of the PCB board
If so try a temporary jumper to the 2 pads:

 

[u439857293874]

Thanks for your replay. I just connected them but the output is still the same.

 

[music6000]

Check your pinout???

 

[u439857293874]

Ok I switched the pinout around and it still sounds the same

 

[music6000]

Disconnect Power, Check for Continuity with matching numbers:

 

[u439857293874]

This is how I'm testing for continuity. Am I doing it right? Basically just using this signal tracer. One end on the input then touching the spots to see if I hear a sound.

 

[u439857293874]

Actually I should probably use a multimeter on continuity mode. Makes sense.

 

[u439857293874]

Just checked all the highlighted points with the multimeter for continuity and they all check out.

 

[music6000]

Just checked all the highlighted points with the multimeter for continuity and they all check out.

I need to clarify something, the left Footswitch turns the pedal ON and the the Footswitch on the right only works as a second gain stage.
If you turn the left footswitch OFF, it turns the whole pedal OFF regardless if the Footswitch on the right is ON or OFF.

 

[u439857293874]

When I press the left footswitch the pedal seems to work except the Level 2 knob doesn't do anything. When I press the right footswitch after the pedal is on its very quiet and the only thing I hear sounds like bleed from the first channel if I just turn all the knobs up. Still the Level 2 knob doesn't do anything. When I turn off the right switch then the first channel is very loud.

 

[music6000]

Level 2 knob only works when Right Footswitch is On & Left Footswitch/ Bypass is On!
The High Trimmer is your 2nd Gain stage for Level 2 when in conjunction when the Left Footswitch is On
Check all the matching colours for Continuity, Power Disconnected!:

 

[u439857293874]

Level 2 knob only works when Right Footswitch is On & Left Footswitch/ Bypass is On!
The High Trimmer is your 2nd Gain stage for Level 2 when in conjunction when the Left Footswitch is On
Check all the matching colours for Continuity, Power Disconnected!:
View attachment 43796

I just checked those spots and they all look good for continuity but still the same result. When I press the right footswitch the pedal goes silent.